@@ -70,7 +70,7 @@ $(subst %,%_BLAKE2,$(objects)) :
$(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
@$(PREBUILD)
@rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar axf $(DIR_DL)/$(DL_FILE)
- cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/mpfr-4.2.0-cumulative-patches-1-to-4.patch
+ cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/mpfr-4.2.0-cumulative-patches-1-to-9.patch
cd $(DIR_APP) && $(CONFIGURE_ARGS) ./configure \
--prefix=/usr \
--enable-thread-safe
deleted file mode 100644
@@ -1,521 +0,0 @@
-diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
---- mpfr-4.2.0-a/PATCHES 2023-04-17 21:17:39.748645280 +0000
-+++ mpfr-4.2.0-b/PATCHES 2023-04-17 21:17:39.792645218 +0000
-@@ -0,0 +1 @@
-+tsprintf-thousands
-diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
---- mpfr-4.2.0-a/VERSION 2023-01-06 10:55:57.000000000 +0000
-+++ mpfr-4.2.0-b/VERSION 2023-04-17 21:17:39.792645218 +0000
-@@ -1 +1 @@
--4.2.0
-+4.2.0-p1
-diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
---- mpfr-4.2.0-a/src/mpfr.h 2023-01-06 10:55:57.000000000 +0000
-+++ mpfr-4.2.0-b/src/mpfr.h 2023-04-17 21:17:39.788645224 +0000
-@@ -27,7 +27,7 @@
- #define MPFR_VERSION_MAJOR 4
- #define MPFR_VERSION_MINOR 2
- #define MPFR_VERSION_PATCHLEVEL 0
--#define MPFR_VERSION_STRING "4.2.0"
-+#define MPFR_VERSION_STRING "4.2.0-p1"
-
- /* User macros:
- MPFR_USE_FILE: Define it to make MPFR define functions dealing
-diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
---- mpfr-4.2.0-a/src/version.c 2023-01-06 10:55:57.000000000 +0000
-+++ mpfr-4.2.0-b/src/version.c 2023-04-17 21:17:39.792645218 +0000
-@@ -25,5 +25,5 @@
- const char *
- mpfr_get_version (void)
- {
-- return "4.2.0";
-+ return "4.2.0-p1";
- }
-diff -Naurd mpfr-4.2.0-a/tests/tsprintf.c mpfr-4.2.0-b/tests/tsprintf.c
---- mpfr-4.2.0-a/tests/tsprintf.c 2023-01-05 17:09:48.000000000 +0000
-+++ mpfr-4.2.0-b/tests/tsprintf.c 2023-04-17 21:17:39.784645229 +0000
-@@ -1715,7 +1715,25 @@
- check_sprintf ("000000001,000", "%'013.4Rg", x);
-
- #ifdef PRINTF_GROUPFLAG
-- check_vsprintf ("+01,234,567 :", "%0+ -'13.10Pd:", (mpfr_prec_t) 1234567);
-+ /* Do not test the thousands separator with a precision field larger
-+ than the number of digits (thus needing leading zeros), such as
-+ "%0+ -'13.10Pd:" (used up to MPFR 4.2.0), since the GNU libc is
-+ buggy: https://sourceware.org/bugzilla/show_bug.cgi?id=23432
-+ We don't know about the other implementations.
-+ This new test works fine with glibc up to 2.36, but fails with 2.37
-+ (as reported by Klaus Dittrich in the MPFR mailing-list); this is
-+ actually a bug introduced in glibc 2.37, not in MPFR:
-+ https://sourceware.org/bugzilla/show_bug.cgi?id=30068
-+ Since this bug can yield a buffer overflow (CVE-2023-25139), possibly
-+ affecting MPFR users, let us rather require a fix in glibc. This bug
-+ has been fixed in the 2.37 branch:
-+ https://sourceware.org/git/?p=glibc.git;a=commit;h=07b9521fc6
-+ If we wanted to check that and avoid a failure of the test because of
-+ a buggy C library (while MPFR would be consistent with the C library),
-+ we could compare the MPFR output with both the correct output and the
-+ output from the C library (possibly buggy). But to do that in a clean
-+ way, this would require a change in the check_vsprintf() call. */
-+ check_vsprintf ("+1,234,567 :", "%0+ -'13Pd:", (mpfr_prec_t) 1234567);
- #endif
-
- mpfr_clear (x);
-diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
---- mpfr-4.2.0-a/PATCHES 2023-04-17 21:18:00.464616127 +0000
-+++ mpfr-4.2.0-b/PATCHES 2023-04-17 21:18:00.512616059 +0000
-@@ -0,0 +1 @@
-+ui_pow_ui-overflow
-diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
---- mpfr-4.2.0-a/VERSION 2023-04-17 21:17:39.792645218 +0000
-+++ mpfr-4.2.0-b/VERSION 2023-04-17 21:18:00.512616059 +0000
-@@ -1 +1 @@
--4.2.0-p1
-+4.2.0-p2
-diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
---- mpfr-4.2.0-a/src/mpfr.h 2023-04-17 21:17:39.788645224 +0000
-+++ mpfr-4.2.0-b/src/mpfr.h 2023-04-17 21:18:00.508616065 +0000
-@@ -27,7 +27,7 @@
- #define MPFR_VERSION_MAJOR 4
- #define MPFR_VERSION_MINOR 2
- #define MPFR_VERSION_PATCHLEVEL 0
--#define MPFR_VERSION_STRING "4.2.0-p1"
-+#define MPFR_VERSION_STRING "4.2.0-p2"
-
- /* User macros:
- MPFR_USE_FILE: Define it to make MPFR define functions dealing
-diff -Naurd mpfr-4.2.0-a/src/ui_pow_ui.c mpfr-4.2.0-b/src/ui_pow_ui.c
---- mpfr-4.2.0-a/src/ui_pow_ui.c 2023-01-05 17:09:48.000000000 +0000
-+++ mpfr-4.2.0-b/src/ui_pow_ui.c 2023-04-17 21:18:00.504616070 +0000
-@@ -23,7 +23,7 @@
- #include "mpfr-impl.h"
-
- int
--mpfr_ui_pow_ui (mpfr_ptr x, unsigned long int y, unsigned long int n,
-+mpfr_ui_pow_ui (mpfr_ptr x, unsigned long int k, unsigned long int n,
- mpfr_rnd_t rnd)
- {
- mpfr_exp_t err;
-@@ -35,22 +35,28 @@
- MPFR_ZIV_DECL (loop);
- MPFR_SAVE_EXPO_DECL (expo);
-
-+ MPFR_LOG_FUNC
-+ (("k=%lu n=%lu rnd=%d", k, n, rnd),
-+ ("y[%Pu]=%.*Rg inexact=%d",
-+ mpfr_get_prec (x), mpfr_log_prec, x, inexact));
-+
- if (MPFR_UNLIKELY (n <= 1))
- {
- if (n == 1)
-- return mpfr_set_ui (x, y, rnd); /* y^1 = y */
-+ return mpfr_set_ui (x, k, rnd); /* k^1 = k */
- else
-- return mpfr_set_ui (x, 1, rnd); /* y^0 = 1 for any y */
-+ return mpfr_set_ui (x, 1, rnd); /* k^0 = 1 for any k */
- }
-- else if (MPFR_UNLIKELY (y <= 1))
-+ else if (MPFR_UNLIKELY (k <= 1))
- {
-- if (y == 1)
-+ if (k == 1)
- return mpfr_set_ui (x, 1, rnd); /* 1^n = 1 for any n > 0 */
- else
- return mpfr_set_ui (x, 0, rnd); /* 0^n = 0 for any n > 0 */
- }
-
-- for (size_n = 0, m = n; m; size_n++, m >>= 1);
-+ for (size_n = 0, m = n; m != 0; size_n++, m >>= 1)
-+ ;
-
- MPFR_SAVE_EXPO_MARK (expo);
- prec = MPFR_PREC (x) + 3 + size_n;
-@@ -60,23 +66,55 @@
- for (;;)
- {
- int i = size_n;
-+ unsigned int inex_res;
-
-- inexact = mpfr_set_ui (res, y, MPFR_RNDU);
-+ inex_res = mpfr_set_ui (res, k, MPFR_RNDU);
- err = 1;
- /* now 2^(i-1) <= n < 2^i: i=1+floor(log2(n)) */
- for (i -= 2; i >= 0; i--)
- {
-- inexact |= mpfr_sqr (res, res, MPFR_RNDU);
-+ inex_res |= mpfr_sqr (res, res, MPFR_RNDU);
- err++;
- if (n & (1UL << i))
-- inexact |= mpfr_mul_ui (res, res, y, MPFR_RNDU);
-+ inex_res |= mpfr_mul_ui (res, res, k, MPFR_RNDU);
- }
-+
-+ if (MPFR_UNLIKELY (MPFR_IS_INF (res)))
-+ {
-+ mpfr_t kf;
-+ mpz_t z;
-+ int size_k;
-+ MPFR_BLOCK_DECL (flags);
-+
-+ /* Let's handle the overflow by calling mpfr_pow_z.
-+ Alternatively, we could call mpfr_pow_ui; this would
-+ need a bit shorter code below, but mpfr_pow_ui handles
-+ the overflow by calling mpfr_pow_z, so that calling
-+ mpfr_pow_z directly should be a bit more efficient. */
-+
-+ MPFR_ZIV_FREE (loop);
-+ mpfr_clear (res);
-+ for (size_k = 0, m = k; m != 0; size_k++, m >>= 1)
-+ ;
-+ mpfr_init2 (kf, size_k);
-+ inexact = mpfr_set_ui (kf, k, MPFR_RNDN);
-+ MPFR_ASSERTD (inexact == 0);
-+ mpz_init (z);
-+ mpz_set_ui (z, n);
-+ MPFR_BLOCK (flags, inexact = mpfr_pow_z (x, kf, z, rnd););
-+ mpz_clear (z);
-+ mpfr_clear (kf);
-+ MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, flags);
-+ goto end;
-+ }
-+
- /* since the loop is executed floor(log2(n)) times,
- we have err = 1+floor(log2(n)).
- Since prec >= MPFR_PREC(x) + 4 + floor(log2(n)), prec > err */
- err = prec - err;
-
-- if (MPFR_LIKELY (inexact == 0
-+ MPFR_LOG_VAR (res);
-+ if (MPFR_LIKELY (!inex_res
- || MPFR_CAN_ROUND (res, err, MPFR_PREC (x), rnd)))
- break;
-
-@@ -90,6 +128,7 @@
-
- mpfr_clear (res);
-
-+ end:
- MPFR_SAVE_EXPO_FREE (expo);
- return mpfr_check_range (x, inexact, rnd);
- }
-diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
---- mpfr-4.2.0-a/src/version.c 2023-04-17 21:17:39.792645218 +0000
-+++ mpfr-4.2.0-b/src/version.c 2023-04-17 21:18:00.512616059 +0000
-@@ -25,5 +25,5 @@
- const char *
- mpfr_get_version (void)
- {
-- return "4.2.0-p1";
-+ return "4.2.0-p2";
- }
-diff -Naurd mpfr-4.2.0-a/tests/tlog10.c mpfr-4.2.0-b/tests/tlog10.c
---- mpfr-4.2.0-a/tests/tlog10.c 2023-01-05 17:09:48.000000000 +0000
-+++ mpfr-4.2.0-b/tests/tlog10.c 2023-04-17 21:18:00.504616070 +0000
-@@ -49,6 +49,60 @@
- #define TEST_RANDOM_POS 8
- #include "tgeneric.c"
-
-+/* On 2023-02-13, one gets an infinite loop in mpfr_log10 on both
-+ 32-bit and 64-bit hosts when the precision is not large enough
-+ (precision 12 and below). */
-+static void
-+bug20230213 (void)
-+{
-+ mpfr_exp_t old_emin, old_emax, e;
-+ mpfr_t t, x, y0, y1, y2;
-+ int prec;
-+
-+ old_emin = mpfr_get_emin ();
-+ old_emax = mpfr_get_emax ();
-+
-+ set_emin (MPFR_EMIN_MIN);
-+ set_emax (MPFR_EMAX_MAX);
-+ e = mpfr_get_emax () - 1;
-+
-+ /* The precisions of t and y0 should be large enough to avoid
-+ a hard-to-round case for the target precisions. */
-+ mpfr_inits2 (64, t, y0, (mpfr_ptr) 0);
-+ mpfr_set_exp_t (y0, e, MPFR_RNDN);
-+ mpfr_log_ui (t, 10, MPFR_RNDN);
-+ mpfr_div (y0, y0, t, MPFR_RNDN);
-+ mpfr_log_ui (t, 2, MPFR_RNDN);
-+ mpfr_mul (y0, y0, t, MPFR_RNDN);
-+
-+ for (prec = 16; prec >= MPFR_PREC_MIN; prec--)
-+ {
-+ mpfr_inits2 (prec, x, y1, y2, (mpfr_ptr) 0);
-+ mpfr_set (y1, y0, MPFR_RNDN);
-+
-+ mpfr_set_ui_2exp (x, 1, e, MPFR_RNDN);
-+ mpfr_log10 (y2, x, MPFR_RNDN);
-+ MPFR_ASSERTN (MPFR_IS_PURE_FP (y2));
-+ MPFR_ASSERTN (MPFR_IS_POS (y2));
-+
-+ if (! mpfr_equal_p (y1, y2))
-+ {
-+ printf ("Error in bug20230213.\n");
-+ printf ("Expected ");
-+ mpfr_dump (y1);
-+ printf ("Got ");
-+ mpfr_dump (y2);
-+ exit (1);
-+ }
-+ mpfr_clears (x, y1, y2, (mpfr_ptr) 0);
-+ }
-+
-+ mpfr_clears (t, y0, (mpfr_ptr) 0);
-+
-+ set_emin (old_emin);
-+ set_emax (old_emax);
-+}
-+
- int
- main (int argc, char *argv[])
- {
-@@ -112,6 +166,8 @@
- mpfr_clear (x);
- mpfr_clear (y);
-
-+ bug20230213 ();
-+
- data_check ("data/log10", mpfr_log10, "mpfr_log10");
-
- tests_end_mpfr ();
-diff -Naurd mpfr-4.2.0-a/tests/tui_pow.c mpfr-4.2.0-b/tests/tui_pow.c
---- mpfr-4.2.0-a/tests/tui_pow.c 2023-01-05 17:09:48.000000000 +0000
-+++ mpfr-4.2.0-b/tests/tui_pow.c 2023-04-17 21:18:00.504616070 +0000
-@@ -142,6 +142,37 @@
- mpfr_clear (t);
- }
-
-+static void
-+huge (void)
-+{
-+ mpfr_exp_t old_emin, old_emax;
-+ mpfr_t x;
-+
-+ old_emin = mpfr_get_emin ();
-+ old_emax = mpfr_get_emax ();
-+
-+ set_emin (MPFR_EMIN_MIN);
-+ set_emax (MPFR_EMAX_MAX);
-+
-+ mpfr_init2 (x, 8);
-+
-+ /* The purpose of this test is more to check that mpfr_ui_pow_ui
-+ terminates (without taking much memory) rather than checking
-+ the value of x. On 2023-02-13, the +Inf case was not handled
-+ in the Ziv iteration, yielding an infinite loop, affecting
-+ mpfr_log10 in particular. See
-+ commit 90de094f0d9c309daca707aa227470d810866616
-+ */
-+ mpfr_ui_pow_ui (x, 5, ULONG_MAX, MPFR_RNDN);
-+ if (MPFR_EMAX_MAX <= ULONG_MAX) /* true with default _MPFR_EXP_FORMAT */
-+ MPFR_ASSERTN (MPFR_IS_INF (x));
-+
-+ mpfr_clear (x);
-+
-+ set_emin (old_emin);
-+ set_emax (old_emax);
-+}
-+
- int
- main (int argc, char *argv[])
- {
-@@ -180,6 +211,7 @@
- }
-
- test1 ();
-+ huge ();
-
- {
- mpfr_t z, t;
-diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
---- mpfr-4.2.0-a/PATCHES 2023-04-17 21:18:26.860579184 +0000
-+++ mpfr-4.2.0-b/PATCHES 2023-04-17 21:18:26.904579122 +0000
-@@ -0,0 +1 @@
-+multibyte-decimal_point
-diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
---- mpfr-4.2.0-a/VERSION 2023-04-17 21:18:00.512616059 +0000
-+++ mpfr-4.2.0-b/VERSION 2023-04-17 21:18:26.904579122 +0000
-@@ -1 +1 @@
--4.2.0-p2
-+4.2.0-p3
-diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
---- mpfr-4.2.0-a/src/mpfr.h 2023-04-17 21:18:00.508616065 +0000
-+++ mpfr-4.2.0-b/src/mpfr.h 2023-04-17 21:18:26.900579128 +0000
-@@ -27,7 +27,7 @@
- #define MPFR_VERSION_MAJOR 4
- #define MPFR_VERSION_MINOR 2
- #define MPFR_VERSION_PATCHLEVEL 0
--#define MPFR_VERSION_STRING "4.2.0-p2"
-+#define MPFR_VERSION_STRING "4.2.0-p3"
-
- /* User macros:
- MPFR_USE_FILE: Define it to make MPFR define functions dealing
-diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
---- mpfr-4.2.0-a/src/version.c 2023-04-17 21:18:00.512616059 +0000
-+++ mpfr-4.2.0-b/src/version.c 2023-04-17 21:18:26.904579122 +0000
-@@ -25,5 +25,5 @@
- const char *
- mpfr_get_version (void)
- {
-- return "4.2.0-p2";
-+ return "4.2.0-p3";
- }
-diff -Naurd mpfr-4.2.0-a/tests/tfprintf.c mpfr-4.2.0-b/tests/tfprintf.c
---- mpfr-4.2.0-a/tests/tfprintf.c 2023-01-05 17:09:48.000000000 +0000
-+++ mpfr-4.2.0-b/tests/tfprintf.c 2023-04-17 21:18:26.896579133 +0000
-@@ -61,6 +61,12 @@
- exit (1); \
- }
-
-+#if MPFR_LCONV_DPTS
-+#define DPLEN ((int) strlen (localeconv()->decimal_point))
-+#else
-+#define DPLEN 1
-+#endif
-+
- /* limit for random precision in random() */
- const int prec_max_printf = 5000;
-
-@@ -195,12 +201,12 @@
- lo, &ulo);
- check_length (2, ulo, 36, lu);
- check_vfprintf (fout, "a. %hi, b. %*f, c. %Re%hn", ush, 3, f, mpfr, &ush);
-- check_length (3, ush, 46, hu);
-+ check_length (3, ush, 45 + DPLEN, hu);
- check_vfprintf (fout, "a. %hi, b. %f, c. %#.2Rf%n", sh, d, mpfr, &i);
-- check_length (4, i, 29, d);
-+ check_length (4, i, 28 + DPLEN, d);
- check_vfprintf (fout, "a. %R*A, b. %Fe, c. %i%zn", rnd, mpfr, mpf, sz,
- &sz);
-- check_length (5, (unsigned long) sz, 34, lu); /* no format specifier "%zu" in C90 */
-+ check_length (5, (unsigned long) sz, 33 + DPLEN, lu); /* no format specifier "%zu" in C90 */
- check_vfprintf (fout, "a. %Pu, b. %c, c. %Zi%Zn", prec, ch, mpz, &mpz);
- check_length_with_cmp (6, mpz, 17, mpz_cmp_ui (mpz, 17), Zi);
- check_vfprintf (fout, "%% a. %#.0RNg, b. %Qx%Rn, c. %p", mpfr, mpq, &mpfr,
-@@ -224,7 +230,7 @@
-
- #ifdef PRINTF_L
- check_vfprintf (fout, "a. %RA, b. %Lf, c. %QX%zn", mpfr, ld, mpq, &sz);
-- check_length (9, (unsigned long) sz, 30, lu); /* no format specifier "%zu" in C90 */
-+ check_length (9, (unsigned long) sz, 29 + DPLEN, lu); /* no format specifier "%zu" in C90 */
- #endif
-
- #ifndef NPRINTF_HH
-diff -Naurd mpfr-4.2.0-a/tests/tprintf.c mpfr-4.2.0-b/tests/tprintf.c
---- mpfr-4.2.0-a/tests/tprintf.c 2023-01-05 17:09:48.000000000 +0000
-+++ mpfr-4.2.0-b/tests/tprintf.c 2023-04-17 21:18:26.896579133 +0000
-@@ -68,6 +68,12 @@
- exit (1); \
- }
-
-+#if MPFR_LCONV_DPTS
-+#define DPLEN ((int) strlen (localeconv()->decimal_point))
-+#else
-+#define DPLEN 1
-+#endif
-+
- /* limit for random precision in random() */
- const int prec_max_printf = 5000;
- /* boolean: is stdout redirected to a file ? */
-@@ -316,11 +322,11 @@
- check_vprintf ("a. %c, b. %Rb, c. %u, d. %li%ln", i, mpfr, i, lo, &ulo);
- check_length (2, ulo, 36, lu);
- check_vprintf ("a. %hi, b. %*f, c. %Re%hn", ush, 3, f, mpfr, &ush);
-- check_length (3, ush, 46, hu);
-+ check_length (3, ush, 45 + DPLEN, hu);
- check_vprintf ("a. %hi, b. %f, c. %#.2Rf%n", sh, d, mpfr, &i);
-- check_length (4, i, 29, d);
-+ check_length (4, i, 28 + DPLEN, d);
- check_vprintf ("a. %R*A, b. %Fe, c. %i%zn", rnd, mpfr, mpf, sz, &sz);
-- check_length (5, (unsigned long) sz, 34, lu); /* no format specifier '%zu' in C90 */
-+ check_length (5, (unsigned long) sz, 33 + DPLEN, lu); /* no format specifier '%zu' in C90 */
- check_vprintf ("a. %Pu, b. %c, c. %RUG, d. %Zi%Zn", prec, ch, mpfr, mpz, &mpz);
- check_length_with_cmp (6, mpz, 24, mpz_cmp_ui (mpz, 24), Zi);
- check_vprintf ("%% a. %#.0RNg, b. %Qx%Rn c. %p",
-@@ -344,7 +350,7 @@
-
- #ifdef PRINTF_L
- check_vprintf ("a. %RA, b. %Lf, c. %QX%zn", mpfr, ld, mpq, &sz);
-- check_length (9, (unsigned long) sz, 30, lu); /* no format specifier '%zu' in C90 */
-+ check_length (9, (unsigned long) sz, 29 + DPLEN, lu); /* no format specifier '%zu' in C90 */
- #endif
-
- #ifndef NPRINTF_HH
-diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
---- mpfr-4.2.0-a/PATCHES 2023-04-17 21:19:01.988530337 +0000
-+++ mpfr-4.2.0-b/PATCHES 2023-04-17 21:19:02.032530276 +0000
-@@ -0,0 +1 @@
-+rec_sqrt-zivloop
-diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
---- mpfr-4.2.0-a/VERSION 2023-04-17 21:18:26.904579122 +0000
-+++ mpfr-4.2.0-b/VERSION 2023-04-17 21:19:02.032530276 +0000
-@@ -1 +1 @@
--4.2.0-p3
-+4.2.0-p4
-diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
---- mpfr-4.2.0-a/src/mpfr.h 2023-04-17 21:18:26.900579128 +0000
-+++ mpfr-4.2.0-b/src/mpfr.h 2023-04-17 21:19:02.032530276 +0000
-@@ -27,7 +27,7 @@
- #define MPFR_VERSION_MAJOR 4
- #define MPFR_VERSION_MINOR 2
- #define MPFR_VERSION_PATCHLEVEL 0
--#define MPFR_VERSION_STRING "4.2.0-p3"
-+#define MPFR_VERSION_STRING "4.2.0-p4"
-
- /* User macros:
- MPFR_USE_FILE: Define it to make MPFR define functions dealing
-diff -Naurd mpfr-4.2.0-a/src/rec_sqrt.c mpfr-4.2.0-b/src/rec_sqrt.c
---- mpfr-4.2.0-a/src/rec_sqrt.c 2023-01-05 17:09:48.000000000 +0000
-+++ mpfr-4.2.0-b/src/rec_sqrt.c 2023-04-17 21:19:02.024530287 +0000
-@@ -463,6 +463,7 @@
- int s, cy, inex;
- mpfr_limb_ptr x;
- MPFR_TMP_DECL(marker);
-+ MPFR_ZIV_DECL (loop);
-
- MPFR_LOG_FUNC
- (("x[%Pu]=%.*Rg rnd=%d", mpfr_get_prec (u), mpfr_log_prec, u, rnd_mode),
-@@ -530,6 +531,7 @@
- wp = rp + 11;
- if (wp < rn * GMP_NUMB_BITS)
- wp = rn * GMP_NUMB_BITS;
-+ MPFR_ZIV_INIT (loop, wp);
- for (;;)
- {
- MPFR_TMP_MARK (marker);
-@@ -561,8 +563,9 @@
- }
- MPFR_TMP_FREE(marker);
-
-- wp += GMP_NUMB_BITS;
-+ MPFR_ZIV_NEXT (loop, wp);
- }
-+ MPFR_ZIV_FREE (loop);
- cy = mpfr_round_raw (MPFR_MANT(r), x, wp, 0, rp, rnd_mode, &inex);
- MPFR_EXP(r) = - (MPFR_EXP(u) - 1 - s) / 2;
- if (MPFR_UNLIKELY(cy != 0))
-diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
---- mpfr-4.2.0-a/src/version.c 2023-04-17 21:18:26.904579122 +0000
-+++ mpfr-4.2.0-b/src/version.c 2023-04-17 21:19:02.032530276 +0000
-@@ -25,5 +25,5 @@
- const char *
- mpfr_get_version (void)
- {
-- return "4.2.0-p3";
-+ return "4.2.0-p4";
- }
-diff -Naurd mpfr-4.2.0-a/tests/trec_sqrt.c mpfr-4.2.0-b/tests/trec_sqrt.c
---- mpfr-4.2.0-a/tests/trec_sqrt.c 2023-01-05 17:09:48.000000000 +0000
-+++ mpfr-4.2.0-b/tests/trec_sqrt.c 2023-04-17 21:19:02.028530282 +0000
-@@ -242,6 +242,8 @@
- data_check ("data/rec_sqrt", mpfr_rec_sqrt, "mpfr_rec_sqrt");
- bad_cases (mpfr_rec_sqrt, pm2, "mpfr_rec_sqrt", 0, -256, 255, 4, 128,
- 800, 50);
-+ bad_cases (mpfr_rec_sqrt, pm2, "mpfr_rec_sqrt", 0, -256, 255, 9999, 9999,
-+ 120000, 1);
-
- end:
- tests_end_mpfr ();
new file mode 100644
@@ -0,0 +1,2046 @@
+diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
+--- mpfr-4.2.0-a/PATCHES 2023-04-17 21:17:39.748645280 +0000
++++ mpfr-4.2.0-b/PATCHES 2023-04-17 21:17:39.792645218 +0000
+@@ -0,0 +1 @@
++tsprintf-thousands
+diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
+--- mpfr-4.2.0-a/VERSION 2023-01-06 10:55:57.000000000 +0000
++++ mpfr-4.2.0-b/VERSION 2023-04-17 21:17:39.792645218 +0000
+@@ -1 +1 @@
+-4.2.0
++4.2.0-p1
+diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
+--- mpfr-4.2.0-a/src/mpfr.h 2023-01-06 10:55:57.000000000 +0000
++++ mpfr-4.2.0-b/src/mpfr.h 2023-04-17 21:17:39.788645224 +0000
+@@ -27,7 +27,7 @@
+ #define MPFR_VERSION_MAJOR 4
+ #define MPFR_VERSION_MINOR 2
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "4.2.0"
++#define MPFR_VERSION_STRING "4.2.0-p1"
+
+ /* User macros:
+ MPFR_USE_FILE: Define it to make MPFR define functions dealing
+diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
+--- mpfr-4.2.0-a/src/version.c 2023-01-06 10:55:57.000000000 +0000
++++ mpfr-4.2.0-b/src/version.c 2023-04-17 21:17:39.792645218 +0000
+@@ -25,5 +25,5 @@
+ const char *
+ mpfr_get_version (void)
+ {
+- return "4.2.0";
++ return "4.2.0-p1";
+ }
+diff -Naurd mpfr-4.2.0-a/tests/tsprintf.c mpfr-4.2.0-b/tests/tsprintf.c
+--- mpfr-4.2.0-a/tests/tsprintf.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/tsprintf.c 2023-04-17 21:17:39.784645229 +0000
+@@ -1715,7 +1715,25 @@
+ check_sprintf ("000000001,000", "%'013.4Rg", x);
+
+ #ifdef PRINTF_GROUPFLAG
+- check_vsprintf ("+01,234,567 :", "%0+ -'13.10Pd:", (mpfr_prec_t) 1234567);
++ /* Do not test the thousands separator with a precision field larger
++ than the number of digits (thus needing leading zeros), such as
++ "%0+ -'13.10Pd:" (used up to MPFR 4.2.0), since the GNU libc is
++ buggy: https://sourceware.org/bugzilla/show_bug.cgi?id=23432
++ We don't know about the other implementations.
++ This new test works fine with glibc up to 2.36, but fails with 2.37
++ (as reported by Klaus Dittrich in the MPFR mailing-list); this is
++ actually a bug introduced in glibc 2.37, not in MPFR:
++ https://sourceware.org/bugzilla/show_bug.cgi?id=30068
++ Since this bug can yield a buffer overflow (CVE-2023-25139), possibly
++ affecting MPFR users, let us rather require a fix in glibc. This bug
++ has been fixed in the 2.37 branch:
++ https://sourceware.org/git/?p=glibc.git;a=commit;h=07b9521fc6
++ If we wanted to check that and avoid a failure of the test because of
++ a buggy C library (while MPFR would be consistent with the C library),
++ we could compare the MPFR output with both the correct output and the
++ output from the C library (possibly buggy). But to do that in a clean
++ way, this would require a change in the check_vsprintf() call. */
++ check_vsprintf ("+1,234,567 :", "%0+ -'13Pd:", (mpfr_prec_t) 1234567);
+ #endif
+
+ mpfr_clear (x);
+diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
+--- mpfr-4.2.0-a/PATCHES 2023-04-17 21:18:00.464616127 +0000
++++ mpfr-4.2.0-b/PATCHES 2023-04-17 21:18:00.512616059 +0000
+@@ -0,0 +1 @@
++ui_pow_ui-overflow
+diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
+--- mpfr-4.2.0-a/VERSION 2023-04-17 21:17:39.792645218 +0000
++++ mpfr-4.2.0-b/VERSION 2023-04-17 21:18:00.512616059 +0000
+@@ -1 +1 @@
+-4.2.0-p1
++4.2.0-p2
+diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
+--- mpfr-4.2.0-a/src/mpfr.h 2023-04-17 21:17:39.788645224 +0000
++++ mpfr-4.2.0-b/src/mpfr.h 2023-04-17 21:18:00.508616065 +0000
+@@ -27,7 +27,7 @@
+ #define MPFR_VERSION_MAJOR 4
+ #define MPFR_VERSION_MINOR 2
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "4.2.0-p1"
++#define MPFR_VERSION_STRING "4.2.0-p2"
+
+ /* User macros:
+ MPFR_USE_FILE: Define it to make MPFR define functions dealing
+diff -Naurd mpfr-4.2.0-a/src/ui_pow_ui.c mpfr-4.2.0-b/src/ui_pow_ui.c
+--- mpfr-4.2.0-a/src/ui_pow_ui.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/src/ui_pow_ui.c 2023-04-17 21:18:00.504616070 +0000
+@@ -23,7 +23,7 @@
+ #include "mpfr-impl.h"
+
+ int
+-mpfr_ui_pow_ui (mpfr_ptr x, unsigned long int y, unsigned long int n,
++mpfr_ui_pow_ui (mpfr_ptr x, unsigned long int k, unsigned long int n,
+ mpfr_rnd_t rnd)
+ {
+ mpfr_exp_t err;
+@@ -35,22 +35,28 @@
+ MPFR_ZIV_DECL (loop);
+ MPFR_SAVE_EXPO_DECL (expo);
+
++ MPFR_LOG_FUNC
++ (("k=%lu n=%lu rnd=%d", k, n, rnd),
++ ("y[%Pu]=%.*Rg inexact=%d",
++ mpfr_get_prec (x), mpfr_log_prec, x, inexact));
++
+ if (MPFR_UNLIKELY (n <= 1))
+ {
+ if (n == 1)
+- return mpfr_set_ui (x, y, rnd); /* y^1 = y */
++ return mpfr_set_ui (x, k, rnd); /* k^1 = k */
+ else
+- return mpfr_set_ui (x, 1, rnd); /* y^0 = 1 for any y */
++ return mpfr_set_ui (x, 1, rnd); /* k^0 = 1 for any k */
+ }
+- else if (MPFR_UNLIKELY (y <= 1))
++ else if (MPFR_UNLIKELY (k <= 1))
+ {
+- if (y == 1)
++ if (k == 1)
+ return mpfr_set_ui (x, 1, rnd); /* 1^n = 1 for any n > 0 */
+ else
+ return mpfr_set_ui (x, 0, rnd); /* 0^n = 0 for any n > 0 */
+ }
+
+- for (size_n = 0, m = n; m; size_n++, m >>= 1);
++ for (size_n = 0, m = n; m != 0; size_n++, m >>= 1)
++ ;
+
+ MPFR_SAVE_EXPO_MARK (expo);
+ prec = MPFR_PREC (x) + 3 + size_n;
+@@ -60,23 +66,55 @@
+ for (;;)
+ {
+ int i = size_n;
++ unsigned int inex_res;
+
+- inexact = mpfr_set_ui (res, y, MPFR_RNDU);
++ inex_res = mpfr_set_ui (res, k, MPFR_RNDU);
+ err = 1;
+ /* now 2^(i-1) <= n < 2^i: i=1+floor(log2(n)) */
+ for (i -= 2; i >= 0; i--)
+ {
+- inexact |= mpfr_sqr (res, res, MPFR_RNDU);
++ inex_res |= mpfr_sqr (res, res, MPFR_RNDU);
+ err++;
+ if (n & (1UL << i))
+- inexact |= mpfr_mul_ui (res, res, y, MPFR_RNDU);
++ inex_res |= mpfr_mul_ui (res, res, k, MPFR_RNDU);
+ }
++
++ if (MPFR_UNLIKELY (MPFR_IS_INF (res)))
++ {
++ mpfr_t kf;
++ mpz_t z;
++ int size_k;
++ MPFR_BLOCK_DECL (flags);
++
++ /* Let's handle the overflow by calling mpfr_pow_z.
++ Alternatively, we could call mpfr_pow_ui; this would
++ need a bit shorter code below, but mpfr_pow_ui handles
++ the overflow by calling mpfr_pow_z, so that calling
++ mpfr_pow_z directly should be a bit more efficient. */
++
++ MPFR_ZIV_FREE (loop);
++ mpfr_clear (res);
++ for (size_k = 0, m = k; m != 0; size_k++, m >>= 1)
++ ;
++ mpfr_init2 (kf, size_k);
++ inexact = mpfr_set_ui (kf, k, MPFR_RNDN);
++ MPFR_ASSERTD (inexact == 0);
++ mpz_init (z);
++ mpz_set_ui (z, n);
++ MPFR_BLOCK (flags, inexact = mpfr_pow_z (x, kf, z, rnd););
++ mpz_clear (z);
++ mpfr_clear (kf);
++ MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, flags);
++ goto end;
++ }
++
+ /* since the loop is executed floor(log2(n)) times,
+ we have err = 1+floor(log2(n)).
+ Since prec >= MPFR_PREC(x) + 4 + floor(log2(n)), prec > err */
+ err = prec - err;
+
+- if (MPFR_LIKELY (inexact == 0
++ MPFR_LOG_VAR (res);
++ if (MPFR_LIKELY (!inex_res
+ || MPFR_CAN_ROUND (res, err, MPFR_PREC (x), rnd)))
+ break;
+
+@@ -90,6 +128,7 @@
+
+ mpfr_clear (res);
+
++ end:
+ MPFR_SAVE_EXPO_FREE (expo);
+ return mpfr_check_range (x, inexact, rnd);
+ }
+diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
+--- mpfr-4.2.0-a/src/version.c 2023-04-17 21:17:39.792645218 +0000
++++ mpfr-4.2.0-b/src/version.c 2023-04-17 21:18:00.512616059 +0000
+@@ -25,5 +25,5 @@
+ const char *
+ mpfr_get_version (void)
+ {
+- return "4.2.0-p1";
++ return "4.2.0-p2";
+ }
+diff -Naurd mpfr-4.2.0-a/tests/tlog10.c mpfr-4.2.0-b/tests/tlog10.c
+--- mpfr-4.2.0-a/tests/tlog10.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/tlog10.c 2023-04-17 21:18:00.504616070 +0000
+@@ -49,6 +49,60 @@
+ #define TEST_RANDOM_POS 8
+ #include "tgeneric.c"
+
++/* On 2023-02-13, one gets an infinite loop in mpfr_log10 on both
++ 32-bit and 64-bit hosts when the precision is not large enough
++ (precision 12 and below). */
++static void
++bug20230213 (void)
++{
++ mpfr_exp_t old_emin, old_emax, e;
++ mpfr_t t, x, y0, y1, y2;
++ int prec;
++
++ old_emin = mpfr_get_emin ();
++ old_emax = mpfr_get_emax ();
++
++ set_emin (MPFR_EMIN_MIN);
++ set_emax (MPFR_EMAX_MAX);
++ e = mpfr_get_emax () - 1;
++
++ /* The precisions of t and y0 should be large enough to avoid
++ a hard-to-round case for the target precisions. */
++ mpfr_inits2 (64, t, y0, (mpfr_ptr) 0);
++ mpfr_set_exp_t (y0, e, MPFR_RNDN);
++ mpfr_log_ui (t, 10, MPFR_RNDN);
++ mpfr_div (y0, y0, t, MPFR_RNDN);
++ mpfr_log_ui (t, 2, MPFR_RNDN);
++ mpfr_mul (y0, y0, t, MPFR_RNDN);
++
++ for (prec = 16; prec >= MPFR_PREC_MIN; prec--)
++ {
++ mpfr_inits2 (prec, x, y1, y2, (mpfr_ptr) 0);
++ mpfr_set (y1, y0, MPFR_RNDN);
++
++ mpfr_set_ui_2exp (x, 1, e, MPFR_RNDN);
++ mpfr_log10 (y2, x, MPFR_RNDN);
++ MPFR_ASSERTN (MPFR_IS_PURE_FP (y2));
++ MPFR_ASSERTN (MPFR_IS_POS (y2));
++
++ if (! mpfr_equal_p (y1, y2))
++ {
++ printf ("Error in bug20230213.\n");
++ printf ("Expected ");
++ mpfr_dump (y1);
++ printf ("Got ");
++ mpfr_dump (y2);
++ exit (1);
++ }
++ mpfr_clears (x, y1, y2, (mpfr_ptr) 0);
++ }
++
++ mpfr_clears (t, y0, (mpfr_ptr) 0);
++
++ set_emin (old_emin);
++ set_emax (old_emax);
++}
++
+ int
+ main (int argc, char *argv[])
+ {
+@@ -112,6 +166,8 @@
+ mpfr_clear (x);
+ mpfr_clear (y);
+
++ bug20230213 ();
++
+ data_check ("data/log10", mpfr_log10, "mpfr_log10");
+
+ tests_end_mpfr ();
+diff -Naurd mpfr-4.2.0-a/tests/tui_pow.c mpfr-4.2.0-b/tests/tui_pow.c
+--- mpfr-4.2.0-a/tests/tui_pow.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/tui_pow.c 2023-04-17 21:18:00.504616070 +0000
+@@ -142,6 +142,37 @@
+ mpfr_clear (t);
+ }
+
++static void
++huge (void)
++{
++ mpfr_exp_t old_emin, old_emax;
++ mpfr_t x;
++
++ old_emin = mpfr_get_emin ();
++ old_emax = mpfr_get_emax ();
++
++ set_emin (MPFR_EMIN_MIN);
++ set_emax (MPFR_EMAX_MAX);
++
++ mpfr_init2 (x, 8);
++
++ /* The purpose of this test is more to check that mpfr_ui_pow_ui
++ terminates (without taking much memory) rather than checking
++ the value of x. On 2023-02-13, the +Inf case was not handled
++ in the Ziv iteration, yielding an infinite loop, affecting
++ mpfr_log10 in particular. See
++ commit 90de094f0d9c309daca707aa227470d810866616
++ */
++ mpfr_ui_pow_ui (x, 5, ULONG_MAX, MPFR_RNDN);
++ if (MPFR_EMAX_MAX <= ULONG_MAX) /* true with default _MPFR_EXP_FORMAT */
++ MPFR_ASSERTN (MPFR_IS_INF (x));
++
++ mpfr_clear (x);
++
++ set_emin (old_emin);
++ set_emax (old_emax);
++}
++
+ int
+ main (int argc, char *argv[])
+ {
+@@ -180,6 +211,7 @@
+ }
+
+ test1 ();
++ huge ();
+
+ {
+ mpfr_t z, t;
+diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
+--- mpfr-4.2.0-a/PATCHES 2023-04-17 21:18:26.860579184 +0000
++++ mpfr-4.2.0-b/PATCHES 2023-04-17 21:18:26.904579122 +0000
+@@ -0,0 +1 @@
++multibyte-decimal_point
+diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
+--- mpfr-4.2.0-a/VERSION 2023-04-17 21:18:00.512616059 +0000
++++ mpfr-4.2.0-b/VERSION 2023-04-17 21:18:26.904579122 +0000
+@@ -1 +1 @@
+-4.2.0-p2
++4.2.0-p3
+diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
+--- mpfr-4.2.0-a/src/mpfr.h 2023-04-17 21:18:00.508616065 +0000
++++ mpfr-4.2.0-b/src/mpfr.h 2023-04-17 21:18:26.900579128 +0000
+@@ -27,7 +27,7 @@
+ #define MPFR_VERSION_MAJOR 4
+ #define MPFR_VERSION_MINOR 2
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "4.2.0-p2"
++#define MPFR_VERSION_STRING "4.2.0-p3"
+
+ /* User macros:
+ MPFR_USE_FILE: Define it to make MPFR define functions dealing
+diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
+--- mpfr-4.2.0-a/src/version.c 2023-04-17 21:18:00.512616059 +0000
++++ mpfr-4.2.0-b/src/version.c 2023-04-17 21:18:26.904579122 +0000
+@@ -25,5 +25,5 @@
+ const char *
+ mpfr_get_version (void)
+ {
+- return "4.2.0-p2";
++ return "4.2.0-p3";
+ }
+diff -Naurd mpfr-4.2.0-a/tests/tfprintf.c mpfr-4.2.0-b/tests/tfprintf.c
+--- mpfr-4.2.0-a/tests/tfprintf.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/tfprintf.c 2023-04-17 21:18:26.896579133 +0000
+@@ -61,6 +61,12 @@
+ exit (1); \
+ }
+
++#if MPFR_LCONV_DPTS
++#define DPLEN ((int) strlen (localeconv()->decimal_point))
++#else
++#define DPLEN 1
++#endif
++
+ /* limit for random precision in random() */
+ const int prec_max_printf = 5000;
+
+@@ -195,12 +201,12 @@
+ lo, &ulo);
+ check_length (2, ulo, 36, lu);
+ check_vfprintf (fout, "a. %hi, b. %*f, c. %Re%hn", ush, 3, f, mpfr, &ush);
+- check_length (3, ush, 46, hu);
++ check_length (3, ush, 45 + DPLEN, hu);
+ check_vfprintf (fout, "a. %hi, b. %f, c. %#.2Rf%n", sh, d, mpfr, &i);
+- check_length (4, i, 29, d);
++ check_length (4, i, 28 + DPLEN, d);
+ check_vfprintf (fout, "a. %R*A, b. %Fe, c. %i%zn", rnd, mpfr, mpf, sz,
+ &sz);
+- check_length (5, (unsigned long) sz, 34, lu); /* no format specifier "%zu" in C90 */
++ check_length (5, (unsigned long) sz, 33 + DPLEN, lu); /* no format specifier "%zu" in C90 */
+ check_vfprintf (fout, "a. %Pu, b. %c, c. %Zi%Zn", prec, ch, mpz, &mpz);
+ check_length_with_cmp (6, mpz, 17, mpz_cmp_ui (mpz, 17), Zi);
+ check_vfprintf (fout, "%% a. %#.0RNg, b. %Qx%Rn, c. %p", mpfr, mpq, &mpfr,
+@@ -224,7 +230,7 @@
+
+ #ifdef PRINTF_L
+ check_vfprintf (fout, "a. %RA, b. %Lf, c. %QX%zn", mpfr, ld, mpq, &sz);
+- check_length (9, (unsigned long) sz, 30, lu); /* no format specifier "%zu" in C90 */
++ check_length (9, (unsigned long) sz, 29 + DPLEN, lu); /* no format specifier "%zu" in C90 */
+ #endif
+
+ #ifndef NPRINTF_HH
+diff -Naurd mpfr-4.2.0-a/tests/tprintf.c mpfr-4.2.0-b/tests/tprintf.c
+--- mpfr-4.2.0-a/tests/tprintf.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/tprintf.c 2023-04-17 21:18:26.896579133 +0000
+@@ -68,6 +68,12 @@
+ exit (1); \
+ }
+
++#if MPFR_LCONV_DPTS
++#define DPLEN ((int) strlen (localeconv()->decimal_point))
++#else
++#define DPLEN 1
++#endif
++
+ /* limit for random precision in random() */
+ const int prec_max_printf = 5000;
+ /* boolean: is stdout redirected to a file ? */
+@@ -316,11 +322,11 @@
+ check_vprintf ("a. %c, b. %Rb, c. %u, d. %li%ln", i, mpfr, i, lo, &ulo);
+ check_length (2, ulo, 36, lu);
+ check_vprintf ("a. %hi, b. %*f, c. %Re%hn", ush, 3, f, mpfr, &ush);
+- check_length (3, ush, 46, hu);
++ check_length (3, ush, 45 + DPLEN, hu);
+ check_vprintf ("a. %hi, b. %f, c. %#.2Rf%n", sh, d, mpfr, &i);
+- check_length (4, i, 29, d);
++ check_length (4, i, 28 + DPLEN, d);
+ check_vprintf ("a. %R*A, b. %Fe, c. %i%zn", rnd, mpfr, mpf, sz, &sz);
+- check_length (5, (unsigned long) sz, 34, lu); /* no format specifier '%zu' in C90 */
++ check_length (5, (unsigned long) sz, 33 + DPLEN, lu); /* no format specifier '%zu' in C90 */
+ check_vprintf ("a. %Pu, b. %c, c. %RUG, d. %Zi%Zn", prec, ch, mpfr, mpz, &mpz);
+ check_length_with_cmp (6, mpz, 24, mpz_cmp_ui (mpz, 24), Zi);
+ check_vprintf ("%% a. %#.0RNg, b. %Qx%Rn c. %p",
+@@ -344,7 +350,7 @@
+
+ #ifdef PRINTF_L
+ check_vprintf ("a. %RA, b. %Lf, c. %QX%zn", mpfr, ld, mpq, &sz);
+- check_length (9, (unsigned long) sz, 30, lu); /* no format specifier '%zu' in C90 */
++ check_length (9, (unsigned long) sz, 29 + DPLEN, lu); /* no format specifier '%zu' in C90 */
+ #endif
+
+ #ifndef NPRINTF_HH
+diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
+--- mpfr-4.2.0-a/PATCHES 2023-04-17 21:19:01.988530337 +0000
++++ mpfr-4.2.0-b/PATCHES 2023-04-17 21:19:02.032530276 +0000
+@@ -0,0 +1 @@
++rec_sqrt-zivloop
+diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
+--- mpfr-4.2.0-a/VERSION 2023-04-17 21:18:26.904579122 +0000
++++ mpfr-4.2.0-b/VERSION 2023-04-17 21:19:02.032530276 +0000
+@@ -1 +1 @@
+-4.2.0-p3
++4.2.0-p4
+diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
+--- mpfr-4.2.0-a/src/mpfr.h 2023-04-17 21:18:26.900579128 +0000
++++ mpfr-4.2.0-b/src/mpfr.h 2023-04-17 21:19:02.032530276 +0000
+@@ -27,7 +27,7 @@
+ #define MPFR_VERSION_MAJOR 4
+ #define MPFR_VERSION_MINOR 2
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "4.2.0-p3"
++#define MPFR_VERSION_STRING "4.2.0-p4"
+
+ /* User macros:
+ MPFR_USE_FILE: Define it to make MPFR define functions dealing
+diff -Naurd mpfr-4.2.0-a/src/rec_sqrt.c mpfr-4.2.0-b/src/rec_sqrt.c
+--- mpfr-4.2.0-a/src/rec_sqrt.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/src/rec_sqrt.c 2023-04-17 21:19:02.024530287 +0000
+@@ -463,6 +463,7 @@
+ int s, cy, inex;
+ mpfr_limb_ptr x;
+ MPFR_TMP_DECL(marker);
++ MPFR_ZIV_DECL (loop);
+
+ MPFR_LOG_FUNC
+ (("x[%Pu]=%.*Rg rnd=%d", mpfr_get_prec (u), mpfr_log_prec, u, rnd_mode),
+@@ -530,6 +531,7 @@
+ wp = rp + 11;
+ if (wp < rn * GMP_NUMB_BITS)
+ wp = rn * GMP_NUMB_BITS;
++ MPFR_ZIV_INIT (loop, wp);
+ for (;;)
+ {
+ MPFR_TMP_MARK (marker);
+@@ -561,8 +563,9 @@
+ }
+ MPFR_TMP_FREE(marker);
+
+- wp += GMP_NUMB_BITS;
++ MPFR_ZIV_NEXT (loop, wp);
+ }
++ MPFR_ZIV_FREE (loop);
+ cy = mpfr_round_raw (MPFR_MANT(r), x, wp, 0, rp, rnd_mode, &inex);
+ MPFR_EXP(r) = - (MPFR_EXP(u) - 1 - s) / 2;
+ if (MPFR_UNLIKELY(cy != 0))
+diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
+--- mpfr-4.2.0-a/src/version.c 2023-04-17 21:18:26.904579122 +0000
++++ mpfr-4.2.0-b/src/version.c 2023-04-17 21:19:02.032530276 +0000
+@@ -25,5 +25,5 @@
+ const char *
+ mpfr_get_version (void)
+ {
+- return "4.2.0-p3";
++ return "4.2.0-p4";
+ }
+diff -Naurd mpfr-4.2.0-a/tests/trec_sqrt.c mpfr-4.2.0-b/tests/trec_sqrt.c
+--- mpfr-4.2.0-a/tests/trec_sqrt.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/trec_sqrt.c 2023-04-17 21:19:02.028530282 +0000
+@@ -242,6 +242,8 @@
+ data_check ("data/rec_sqrt", mpfr_rec_sqrt, "mpfr_rec_sqrt");
+ bad_cases (mpfr_rec_sqrt, pm2, "mpfr_rec_sqrt", 0, -256, 255, 4, 128,
+ 800, 50);
++ bad_cases (mpfr_rec_sqrt, pm2, "mpfr_rec_sqrt", 0, -256, 255, 9999, 9999,
++ 120000, 1);
+
+ end:
+ tests_end_mpfr ();
+diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
+--- mpfr-4.2.0-a/PATCHES 2023-05-12 15:05:00.989811960 +0000
++++ mpfr-4.2.0-b/PATCHES 2023-05-12 15:05:01.085811835 +0000
+@@ -0,0 +1 @@
++reldiff
+diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
+--- mpfr-4.2.0-a/VERSION 2023-04-17 21:19:02.032530276 +0000
++++ mpfr-4.2.0-b/VERSION 2023-05-12 15:05:01.085811835 +0000
+@@ -1 +1 @@
+-4.2.0-p4
++4.2.0-p5
+diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
+--- mpfr-4.2.0-a/src/mpfr.h 2023-04-17 21:19:02.032530276 +0000
++++ mpfr-4.2.0-b/src/mpfr.h 2023-05-12 15:05:01.077811846 +0000
+@@ -27,7 +27,7 @@
+ #define MPFR_VERSION_MAJOR 4
+ #define MPFR_VERSION_MINOR 2
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "4.2.0-p4"
++#define MPFR_VERSION_STRING "4.2.0-p5"
+
+ /* User macros:
+ MPFR_USE_FILE: Define it to make MPFR define functions dealing
+diff -Naurd mpfr-4.2.0-a/src/reldiff.c mpfr-4.2.0-b/src/reldiff.c
+--- mpfr-4.2.0-a/src/reldiff.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/src/reldiff.c 2023-05-12 15:05:01.069811856 +0000
+@@ -30,31 +30,25 @@
+
+ if (MPFR_ARE_SINGULAR (b, c))
+ {
+- if (MPFR_IS_NAN(b) || MPFR_IS_NAN(c))
+- {
+- MPFR_SET_NAN(a);
+- return;
+- }
+- else if (MPFR_IS_INF(b))
++ if (MPFR_IS_NAN (b) || MPFR_IS_INF (b) || MPFR_IS_NAN (c) ||
++ (MPFR_IS_ZERO (b) && MPFR_IS_ZERO (c)))
+ {
+- if (MPFR_IS_INF (c) && (MPFR_SIGN (c) == MPFR_SIGN (b)))
+- MPFR_SET_ZERO(a);
+- else
+- MPFR_SET_NAN(a);
++ MPFR_SET_NAN (a);
+ return;
+ }
+- else if (MPFR_IS_INF(c))
++ if (MPFR_IS_ZERO (b) || MPFR_IS_INF (c))
+ {
+ MPFR_SET_SAME_SIGN (a, b);
+ MPFR_SET_INF (a);
+ return;
+ }
+- else if (MPFR_IS_ZERO(b)) /* reldiff = abs(c)/c = sign(c) */
+- {
+- mpfr_set_si (a, MPFR_INT_SIGN (c), rnd_mode);
+- return;
+- }
+- /* Fall through */
++ /* The case c = 0 with b regular, which should give sign(b) exactly,
++ cannot be optimized here as it is documented in the MPFR manual
++ that this function just computes abs(b-c)/b using the precision
++ of a and the rounding mode rnd_mode for all operations. So let's
++ prefer the potentially "incorrect" result. Note that the correct
++ result is not necessarily better because if could break properties
++ (like monotonicity?) implied by the documentation. */
+ }
+
+ if (a == b)
+@@ -64,8 +58,8 @@
+ }
+
+ mpfr_sub (a, b, c, rnd_mode);
+- mpfr_abs (a, a, rnd_mode); /* for compatibility with MPF */
+- mpfr_div (a, a, (a == b) ? b_copy : b, rnd_mode);
++ MPFR_SET_SIGN (a, 1);
++ mpfr_div (a, a, a == b ? b_copy : b, rnd_mode);
+
+ if (a == b)
+ mpfr_clear (b_copy);
+diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
+--- mpfr-4.2.0-a/src/version.c 2023-04-17 21:19:02.032530276 +0000
++++ mpfr-4.2.0-b/src/version.c 2023-05-12 15:05:01.081811839 +0000
+@@ -25,5 +25,5 @@
+ const char *
+ mpfr_get_version (void)
+ {
+- return "4.2.0-p4";
++ return "4.2.0-p5";
+ }
+diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
+--- mpfr-4.2.0-a/PATCHES 2023-05-12 15:06:11.789722083 +0000
++++ mpfr-4.2.0-b/PATCHES 2023-05-12 15:06:11.885721962 +0000
+@@ -0,0 +1 @@
++tests-reuse
+diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
+--- mpfr-4.2.0-a/VERSION 2023-05-12 15:05:01.085811835 +0000
++++ mpfr-4.2.0-b/VERSION 2023-05-12 15:06:11.885721962 +0000
+@@ -1 +1 @@
+-4.2.0-p5
++4.2.0-p6
+diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
+--- mpfr-4.2.0-a/src/mpfr.h 2023-05-12 15:05:01.077811846 +0000
++++ mpfr-4.2.0-b/src/mpfr.h 2023-05-12 15:06:11.877721972 +0000
+@@ -27,7 +27,7 @@
+ #define MPFR_VERSION_MAJOR 4
+ #define MPFR_VERSION_MINOR 2
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "4.2.0-p5"
++#define MPFR_VERSION_STRING "4.2.0-p6"
+
+ /* User macros:
+ MPFR_USE_FILE: Define it to make MPFR define functions dealing
+diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
+--- mpfr-4.2.0-a/src/version.c 2023-05-12 15:05:01.081811839 +0000
++++ mpfr-4.2.0-b/src/version.c 2023-05-12 15:06:11.885721962 +0000
+@@ -25,5 +25,5 @@
+ const char *
+ mpfr_get_version (void)
+ {
+- return "4.2.0-p5";
++ return "4.2.0-p6";
+ }
+diff -Naurd mpfr-4.2.0-a/tests/reuse.c mpfr-4.2.0-b/tests/reuse.c
+--- mpfr-4.2.0-a/tests/reuse.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/reuse.c 2023-05-12 15:06:11.869721983 +0000
+@@ -78,22 +78,16 @@
+ mpfr_const_pi (x, MPFR_RNDN);
+ MPFR_SET_EXP (x, MPFR_GET_EXP (x)-1);
+ break;
+- default:
++ case 11:
+ mpfr_urandomb (x, RANDS);
+ if (RAND_BOOL ())
+ mpfr_neg (x, x, MPFR_RNDN);
+ break;
++ default:
++ MPFR_ASSERTN (0);
+ }
+ }
+
+-/* same as mpfr_cmp, but returns 0 for both NaN's */
+-static int
+-mpfr_compare (mpfr_srcptr a, mpfr_srcptr b)
+-{
+- return (MPFR_IS_NAN(a)) ? !MPFR_IS_NAN(b) :
+- (MPFR_IS_NAN(b) || mpfr_cmp(a, b));
+-}
+-
+ static void
+ test3 (int (*testfunc)(mpfr_ptr, mpfr_srcptr, mpfr_srcptr, mpfr_rnd_t),
+ const char *foo, mpfr_prec_t prec, mpfr_rnd_t rnd)
+@@ -112,10 +106,10 @@
+
+ /* for each variable, consider each of the following 6 possibilities:
+ NaN, +Infinity, -Infinity, +0, -0 or a random number */
+- for (i=0; i < SPECIAL_MAX*SPECIAL_MAX ; i++)
++ for (i = 0; i < SPECIAL_MAX * SPECIAL_MAX; i++)
+ {
+- set_special (ref2, i%SPECIAL_MAX);
+- set_special (ref3, i/SPECIAL_MAX);
++ set_special (ref2, i % SPECIAL_MAX);
++ set_special (ref3, i / SPECIAL_MAX);
+
+ /* reference call: foo(a, b, c) */
+ testfunc (ref1, ref2, ref3, rnd);
+@@ -124,11 +118,11 @@
+ mpfr_set (res1, ref2, rnd); /* exact operation */
+ testfunc (res1, res1, ref3, rnd);
+
+- if (mpfr_compare (res1, ref1))
++ if (! SAME_VAL (res1, ref1))
+ {
+ printf ("Error for %s(a, a, c) with %s for ", foo,
+ mpfr_print_rnd_mode (rnd));
+- DISP("a=",ref2); DISP2(", c=",ref3);
++ DISP("a=", ref2); DISP2(", c=", ref3);
+ printf ("expected "); mpfr_dump (ref1);
+ printf ("got "); mpfr_dump (res1);
+ exit (1);
+@@ -137,11 +131,12 @@
+ /* foo(a, b, a) */
+ mpfr_set (res1, ref3, rnd);
+ testfunc (res1, ref2, res1, rnd);
+- if (mpfr_compare (res1, ref1))
++ if (! SAME_VAL (res1, ref1))
+ {
+ printf ("Error for %s(a, b, a) for ", foo);
+- DISP("b=",ref2); DISP2(", a=", ref3);
+- DISP("expected ", ref1); DISP2(", got ",res1);
++ DISP("b=", ref2); DISP2(", a=", ref3);
++ printf ("expected "); mpfr_dump (ref1);
++ printf ("got "); mpfr_dump (res1);
+ exit (1);
+ }
+
+@@ -151,11 +146,12 @@
+ mpfr_set (res1, ref2, rnd);
+ testfunc (res1, res1, res1, rnd);
+
+- if (mpfr_compare (res1, ref1))
++ if (! SAME_VAL (res1, ref1))
+ {
+ printf ("Error for %s(a, a, a) for ", foo);
+- DISP2("a=",ref2);
+- DISP("expected ", ref1); DISP2(", got ", res1);
++ DISP2("a=", ref2);
++ printf ("expected "); mpfr_dump (ref1);
++ printf ("got "); mpfr_dump (res1);
+ exit (1);
+ }
+ }
+@@ -187,13 +183,13 @@
+ /* for each variable, consider each of the following 6 possibilities:
+ NaN, +Infinity, -Infinity, +0, -0 or a random number */
+
+- for (i=0; i<SPECIAL_MAX; i++)
++ for (i = 0; i < SPECIAL_MAX; i++)
+ {
+ set_special (op1, i);
+- for (j=0; j<SPECIAL_MAX; j++)
++ for (j = 0; j < SPECIAL_MAX; j++)
+ {
+ set_special (op2, j);
+- for (k=0; k<SPECIAL_MAX; k++)
++ for (k = 0; k < SPECIAL_MAX; k++)
+ {
+ set_special (op3, k);
+
+@@ -204,11 +200,12 @@
+ mpfr_set (res, op1, rnd); /* exact operation */
+ testfunc (res, res, op2, op3, rnd);
+
+- if (mpfr_compare (res, ref))
++ if (! SAME_VAL (res, ref))
+ {
+ printf ("Error for %s(a, a, b, c) for ", foo);
+ DISP("a=", op1); DISP(", b=", op2); DISP2(", c=", op3);
+- DISP("expected ", ref); DISP2(", got ", res);
++ printf ("expected "); mpfr_dump (ref);
++ printf ("got "); mpfr_dump (res);
+ exit (1);
+ }
+
+@@ -216,11 +213,12 @@
+ mpfr_set (res, op2, rnd);
+ testfunc (res, op1, res, op3, rnd);
+
+- if (mpfr_compare (res, ref))
++ if (! SAME_VAL (res, ref))
+ {
+ printf ("Error for %s(a, a, b, c) for ", foo);
+ DISP("a=", op1); DISP(", b=", op2); DISP2(", c=", op3);
+- DISP("expected ", ref); DISP2(", got ", res);
++ printf ("expected "); mpfr_dump (ref);
++ printf ("got "); mpfr_dump (res);
+ exit (1);
+ }
+
+@@ -228,35 +226,38 @@
+ mpfr_set (res, op3, rnd);
+ testfunc (res, op1, op2, res, rnd);
+
+- if (mpfr_compare (res, ref))
++ if (! SAME_VAL (res, ref))
+ {
+ printf ("Error for %s(a, a, b, c) for ", foo);
+ DISP("a=", op1); DISP(", b=", op2); DISP2(", c=", op3);
+- DISP("expected ", ref); DISP2(", got ", res);
++ printf ("expected "); mpfr_dump (ref);
++ printf ("got "); mpfr_dump (res);
+ exit (1);
+ }
+
+- /* foo(a, a, a,c) */
++ /* foo(a, a, a, c) */
+ testfunc (ref, op1, op1, op3, rnd);
+ mpfr_set (res, op1, rnd);
+ testfunc (res, res, res, op3, rnd);
+- if (mpfr_compare (res, ref))
++ if (! SAME_VAL (res, ref))
+ {
+ printf ("Error for %s(a, a, b, c) for ", foo);
+ DISP("a=", op1); DISP(", a=", op2); DISP2(", c=", op3);
+- DISP("expected ", ref); DISP2(", got ", res);
++ printf ("expected "); mpfr_dump (ref);
++ printf ("got "); mpfr_dump (res);
+ exit (1);
+ }
+
+- /* foo(a, a, b,a) */
++ /* foo(a, a, b, a) */
+ testfunc (ref, op1, op2, op1, rnd);
+ mpfr_set (res, op1, rnd);
+ testfunc (res, res, op2, res, rnd);
+- if (mpfr_compare (res, ref))
++ if (! SAME_VAL (res, ref))
+ {
+ printf ("Error for %s(a, a, b, c) for ", foo);
+ DISP("a=", op1); DISP(", a=", op2); DISP2(", c=", op3);
+- DISP("expected ", ref); DISP2(", got ", res);
++ printf ("expected "); mpfr_dump (ref);
++ printf ("got "); mpfr_dump (res);
+ exit (1);
+ }
+
+@@ -264,11 +265,12 @@
+ testfunc (ref, op1, op2, op2, rnd);
+ mpfr_set (res, op2, rnd);
+ testfunc (res, op1, res, res, rnd);
+- if (mpfr_compare (res, ref))
++ if (! SAME_VAL (res, ref))
+ {
+ printf ("Error for %s(a, a, b, c) for ", foo);
+ DISP("a=", op1); DISP(", a=", op2); DISP2(", c=", op3);
+- DISP("expected ", ref); DISP2(", got ", res);
++ printf ("expected "); mpfr_dump (ref);
++ printf ("got "); mpfr_dump (res);
+ exit (1);
+ }
+
+@@ -276,11 +278,12 @@
+ testfunc (ref, op1, op1, op1, rnd);
+ mpfr_set (res, op1, rnd);
+ testfunc (res, res, res, res, rnd);
+- if (mpfr_compare (res, ref))
++ if (! SAME_VAL (res, ref))
+ {
+ printf ("Error for %s(a, a, a, a) for ", foo);
+ DISP2("a=", op1);
+- DISP("expected ", ref); DISP2(", got ", res);
++ printf ("expected "); mpfr_dump (ref);
++ printf ("got "); mpfr_dump (res);
+ exit (1);
+ }
+ }
+@@ -313,10 +316,10 @@
+
+ /* ref2 can be NaN, +Inf, -Inf, +0, -0 or any number
+ ref3 can be 0 or any number */
+- for (i=0; i<SPECIAL_MAX*2; i++)
++ for (i = 0; i < SPECIAL_MAX * 2; i++)
+ {
+- set_special (ref2, i%SPECIAL_MAX);
+- ref3 = i/SPECIAL_MAX == 0 ? 0 : randlimb ();
++ set_special (ref2, i % SPECIAL_MAX);
++ ref3 = i / SPECIAL_MAX == 0 ? 0 : randlimb ();
+
+ /* reference call: foo(a, b, c) */
+ testfunc (ref1, ref2, ref3, rnd);
+@@ -325,10 +328,10 @@
+ mpfr_set (res1, ref2, rnd); /* exact operation */
+ testfunc (res1, res1, ref3, rnd);
+
+- if (mpfr_compare (res1, ref1))
++ if (! SAME_VAL (res1, ref1))
+ {
+ printf ("Error for %s(a, a, c) for c=%u\n", foo, ref3);
+- DISP2("a=",ref2);
++ DISP2("a=", ref2);
+ printf ("expected "); mpfr_dump (ref1);
+ printf ("got "); mpfr_dump (res1);
+ exit (1);
+@@ -356,10 +359,10 @@
+ mpfr_init2 (ref3, prec);
+ mpfr_init2 (res1, prec);
+
+- for (i=0; i<SPECIAL_MAX*2; i++)
++ for (i = 0; i < SPECIAL_MAX * 2; i++)
+ {
+- set_special (ref3, i%SPECIAL_MAX);
+- ref2 = i/SPECIAL_MAX==0 ? 0 : randlimb ();
++ set_special (ref3, i % SPECIAL_MAX);
++ ref2 = i / SPECIAL_MAX == 0 ? 0 : randlimb ();
+
+ /* reference call: foo(a, b, c) */
+ testfunc (ref1, ref2, ref3, rnd);
+@@ -367,7 +370,7 @@
+ /* foo(a, b, a) */
+ mpfr_set (res1, ref3, rnd); /* exact operation */
+ testfunc (res1, ref2, res1, rnd);
+- if (mpfr_compare (res1, ref1))
++ if (! SAME_VAL (res1, ref1))
+ {
+ printf ("Error for %s(a, b, a) for b=%u \n", foo, ref2);
+ DISP2("a=", ref3);
+@@ -397,7 +400,7 @@
+ mpfr_init2 (ref2, prec);
+ mpfr_init2 (res1, prec);
+
+- for (i=0; i<SPECIAL_MAX; i++)
++ for (i = 0; i < SPECIAL_MAX; i++)
+ {
+ set_special (ref2, i);
+
+@@ -407,7 +410,7 @@
+ /* foo(a, a) */
+ mpfr_set (res1, ref2, rnd); /* exact operation */
+ testfunc (res1, res1, rnd);
+- if (mpfr_compare (res1, ref1))
++ if (! SAME_VAL (res1, ref1))
+ {
+ printf ("Error for %s(a, a) for ", foo);
+ DISP2("a=", ref2);
+@@ -437,7 +440,7 @@
+ mpfr_init2 (ref2, prec);
+ mpfr_init2 (res1, prec);
+
+- for (i=0; i<SPECIAL_MAX; i++)
++ for (i = 0; i < SPECIAL_MAX; i++)
+ {
+ set_special (ref2, i);
+
+@@ -447,10 +450,10 @@
+ /* foo(a, a) */
+ mpfr_set (res1, ref2, MPFR_RNDN); /* exact operation */
+ testfunc (res1, res1);
+- if (mpfr_compare (res1, ref1))
++ if (! SAME_VAL (res1, ref1))
+ {
+ printf ("Error for %s(a, a) for ", foo);
+- DISP2("a=",ref2);
++ DISP2("a=", ref2);
+ DISP("expected", ref1); DISP2(", got ", res1);
+ exit (1);
+ }
+@@ -479,7 +482,7 @@
+ mpfr_init2 (res1, prec);
+ mpfr_init2 (res2, prec);
+
+- for (i=0; i<SPECIAL_MAX; i++)
++ for (i = 0; i < SPECIAL_MAX; i++)
+ {
+ set_special (ref3, i);
+
+@@ -489,12 +492,12 @@
+ /* foo(a, b, a) */
+ mpfr_set (res1, ref3, rnd); /* exact operation */
+ testfunc (res1, res2, res1, rnd);
+- if (mpfr_compare (res1, ref1) || mpfr_compare (res2, ref2))
++ if (! SAME_VAL (res1, ref1) || ! SAME_VAL (res2, ref2))
+ {
+ printf ("Error for %s(a, b, a) for rnd=%s, ", foo,
+ mpfr_print_rnd_mode (rnd));
+- DISP2("a=",ref3);
+- DISP("expected (", ref1); DISP(",",ref2);
++ DISP2("a=", ref3);
++ DISP("expected (", ref1); DISP(",", ref2);
+ DISP("), got (", res1); DISP(",", res2); printf(")\n");
+ exit (1);
+ }
+@@ -502,11 +505,11 @@
+ /* foo(a, b, b) */
+ mpfr_set (res2, ref3, rnd); /* exact operation */
+ testfunc (res1, res2, res2, rnd);
+- if (mpfr_compare (res1, ref1) || mpfr_compare (res2, ref2))
++ if (! SAME_VAL (res1, ref1) || ! SAME_VAL (res2, ref2))
+ {
+ printf ("Error for %s(a, b, b) for ", foo);
+- DISP2("b=",ref3);
+- DISP("expected (", ref1); DISP(",",ref2);
++ DISP2("b=", ref3);
++ DISP("expected (", ref1); DISP(",", ref2);
+ DISP("), got (", res1); DISP(",", res2); printf(")\n");
+ exit (1);
+ }
+@@ -561,10 +564,10 @@
+ mpfr_set (res1, ref2, rnd); /* exact operation */
+ mpfr_pow (res1, res1, ref3, rnd);
+
+- if (mpfr_compare (res1, ref1))
++ if (! SAME_VAL (res1, ref1))
+ {
+ printf ("Error for pow_int(a, a, c) for ");
+- DISP("a=",ref2); DISP2(", c=",ref3);
++ DISP("a=", ref2); DISP2(", c=", ref3);
+ printf ("expected "); mpfr_dump (ref1);
+ printf ("got "); mpfr_dump (res1);
+ exit (1);
+diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
+--- mpfr-4.2.0-a/PATCHES 2023-05-12 15:08:39.233546717 +0000
++++ mpfr-4.2.0-b/PATCHES 2023-05-12 15:08:39.325546612 +0000
+@@ -0,0 +1 @@
++pow_general
+diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
+--- mpfr-4.2.0-a/VERSION 2023-05-12 15:06:11.885721962 +0000
++++ mpfr-4.2.0-b/VERSION 2023-05-12 15:08:39.325546612 +0000
+@@ -1 +1 @@
+-4.2.0-p6
++4.2.0-p7
+diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
+--- mpfr-4.2.0-a/src/mpfr.h 2023-05-12 15:06:11.877721972 +0000
++++ mpfr-4.2.0-b/src/mpfr.h 2023-05-12 15:08:39.321546616 +0000
+@@ -27,7 +27,7 @@
+ #define MPFR_VERSION_MAJOR 4
+ #define MPFR_VERSION_MINOR 2
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "4.2.0-p6"
++#define MPFR_VERSION_STRING "4.2.0-p7"
+
+ /* User macros:
+ MPFR_USE_FILE: Define it to make MPFR define functions dealing
+diff -Naurd mpfr-4.2.0-a/src/pow.c mpfr-4.2.0-b/src/pow.c
+--- mpfr-4.2.0-a/src/pow.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/src/pow.c 2023-05-12 15:08:39.309546630 +0000
+@@ -131,7 +131,6 @@
+ /* Declaration of the size variable */
+ mpfr_prec_t Nz = MPFR_PREC(z); /* target precision */
+ mpfr_prec_t Nt; /* working precision */
+- mpfr_exp_t err; /* error */
+ MPFR_ZIV_DECL (ziv_loop);
+
+ MPFR_LOG_FUNC
+@@ -171,12 +170,14 @@
+ MPFR_ZIV_INIT (ziv_loop, Nt);
+ for (;;)
+ {
++ mpfr_exp_t err, exp_t;
+ MPFR_BLOCK_DECL (flags1);
+
+ /* compute exp(y*ln|x|), using MPFR_RNDU to get an upper bound, so
+ that we can detect underflows. */
+ mpfr_log (t, absx, MPFR_IS_NEG (y) ? MPFR_RNDD : MPFR_RNDU); /* ln|x| */
+ mpfr_mul (t, y, t, MPFR_RNDU); /* y*ln|x| */
++ exp_t = MPFR_GET_EXP (t);
+ if (k_non_zero)
+ {
+ MPFR_LOG_MSG (("subtract k * ln(2)\n", 0));
+@@ -188,14 +189,16 @@
+ MPFR_LOG_VAR (t);
+ }
+ /* estimate of the error -- see pow function in algorithms.tex.
+- The error on t is at most 1/2 + 3*2^(EXP(t)+1) ulps, which is
+- <= 2^(EXP(t)+3) for EXP(t) >= -1, and <= 2 ulps for EXP(t) <= -2.
++ The error on t before the subtraction of k*log(2) is at most
++ 1/2 + 3*2^(EXP(t)+1) ulps, which is <= 2^(EXP(t)+3) for EXP(t) >= -1,
++ and <= 2 ulps for EXP(t) <= -2.
+ Additional error if k_no_zero: treal = t * errk, with
+ 1 - |k| * 2^(-Nt) <= exp(-|k| * 2^(-Nt)) <= errk <= 1,
+ i.e., additional absolute error <= 2^(EXP(k)+EXP(t)-Nt).
+- Total error <= 2^err1 + 2^err2 <= 2^(max(err1,err2)+1). */
+- err = MPFR_NOTZERO (t) && MPFR_GET_EXP (t) >= -1 ?
+- MPFR_GET_EXP (t) + 3 : 1;
++ Total ulp error <= 2^err1 + 2^err2 <= 2^(max(err1,err2)+1),
++ where err1 = EXP(t)+3 for EXP(t) >= -1, and 1 otherwise,
++ and err2 = EXP(k). */
++ err = MPFR_NOTZERO (t) && exp_t >= -1 ? exp_t + 3 : 1;
+ if (k_non_zero)
+ {
+ if (MPFR_GET_EXP (k) > err)
+@@ -328,11 +331,17 @@
+ */
+ if (rnd_mode == MPFR_RNDN && inexact < 0 && lk < 0 &&
+ MPFR_GET_EXP (z) == __gmpfr_emin - 1 - lk && mpfr_powerof2_raw (z))
+- /* Rounding to nearest, real result > z * 2^k = 2^(emin - 2),
+- * underflow case: we will obtain the correct result and exceptions
+- * by replacing z by nextabove(z).
+- */
+- mpfr_nextabove (z);
++ /* Rounding to nearest, exact result > z * 2^k = 2^(emin - 2),
++ * and underflow case because the rounded result assuming an
++ * unbounded exponent range is 2^(emin - 2). We need to round
++ * to 2^(emin - 1), i.e. to round toward +inf.
++ * Note: the old code was using "mpfr_nextabove (z);" instead of
++ * setting rnd_mode to MPFR_RNDU for the call to mpfr_mul_2si, but
++ * this was incorrect in precision 1 because in this precision,
++ * mpfr_nextabove gave 2^(emin - 1), which is representable,
++ * so that mpfr_mul_2si did not generate the wanted underflow
++ * (the value was correct, but the underflow flag was missing). */
++ rnd_mode = MPFR_RNDU;
+ MPFR_CLEAR_FLAGS ();
+ inex2 = mpfr_mul_2si (z, z, lk, rnd_mode);
+ if (inex2) /* underflow or overflow */
+diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
+--- mpfr-4.2.0-a/src/version.c 2023-05-12 15:06:11.885721962 +0000
++++ mpfr-4.2.0-b/src/version.c 2023-05-12 15:08:39.325546612 +0000
+@@ -25,5 +25,5 @@
+ const char *
+ mpfr_get_version (void)
+ {
+- return "4.2.0-p6";
++ return "4.2.0-p7";
+ }
+diff -Naurd mpfr-4.2.0-a/tests/texp10.c mpfr-4.2.0-b/tests/texp10.c
+--- mpfr-4.2.0-a/tests/texp10.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/texp10.c 2023-05-12 15:08:39.309546630 +0000
+@@ -190,6 +190,187 @@
+ mpfr_clear (y);
+ }
+
++/* Bug in mpfr_pow_general found by ofuf_thresholds (on 2023-02-13 for
++ a 32-bit exponent, changed on 2023-03-06 for a 64-bit exponent too),
++ fixed in commit b62966df913f73f08b3c5252e1d0c702bc20442f.
++ With a 32-bit exponent, failure for i=0.
++ expected 0.1111E1073741823
++ got @Inf@
++ expected flags = inexact (8)
++ got flags = overflow inexact (10)
++ With a 64-bit exponent, failure for i=1.
++ expected 0.11111111111111111111111E4611686018427387903
++ got @Inf@
++ expected flags = inexact (8)
++ got flags = overflow inexact (10)
++ Note: ofuf_thresholds was added to the master branch, but for the
++ time being, there are issues with these tests.
++*/
++static void
++bug20230213 (void)
++{
++ const char *s[2] = {
++ "0x1.34413504b3ccdbd5dd8p+28",
++ "0x1.34413509f79fef2c4e0dd14a7ae0ecfbacdbp+60"
++ };
++ mpfr_t x1, x2, y1, y2;
++ mpfr_prec_t px[2] = { 74, 147 };
++ mpfr_prec_t py[2] = { 4, 23 };
++ mpfr_exp_t old_emax, emax;
++ mpfr_flags_t flags1, flags2;
++ int i;
++
++ old_emax = mpfr_get_emax ();
++
++ for (i = 0; i < 2; i++)
++ {
++ if (i != 0)
++ set_emax (MPFR_EMAX_MAX);
++
++ emax = mpfr_get_emax ();
++
++ mpfr_inits2 (px[i], x1, x2, (mpfr_ptr) 0);
++ mpfr_inits2 (py[i], y1, y2, (mpfr_ptr) 0);
++
++ mpfr_setmax (y1, emax);
++ mpfr_log10 (x1, y1, MPFR_RNDD);
++ mpfr_set_str (x2, s[i], 0, MPFR_RNDN);
++ /* For i == 0, emax == 2^30, so that the value can be checked.
++ For i != 0, check the value for the case emax == 2^62.
++ The "0UL" ensures that the shifts are valid. */
++ if (i == 0 || (((0UL + MPFR_EMAX_MAX) >> 31) >> 30) == 1)
++ {
++ /* printf ("Checking x1 for i=%d\n", i); */
++ MPFR_ASSERTN (mpfr_equal_p (x1, x2));
++ }
++
++ /* Let MAXF be the maximum finite value (y1 above).
++ Since x1 < log10(MAXF), one should have exp10(x1) < MAXF, and
++ therefore, y2 = RU(exp10(x1)) <= RU(MAXF) = MAXF (no overflow). */
++ flags1 = MPFR_FLAGS_INEXACT;
++ mpfr_clear_flags ();
++ mpfr_exp10 (y2, x1, MPFR_RNDU);
++ flags2 = __gmpfr_flags;
++
++ if (! (mpfr_lessequal_p (y2, y1) && flags2 == flags1))
++ {
++ printf ("Error in bug20230213 for i=%d\n", i);
++ printf ("emax = %" MPFR_EXP_FSPEC "d\n", (mpfr_eexp_t) emax);
++ printf ("expected "); mpfr_dump (y1);
++ printf ("got "); mpfr_dump (y2);
++ printf ("expected flags =");
++ flags_out (flags1);
++ printf ("got flags =");
++ flags_out (flags2);
++ exit (1);
++ }
++
++ mpfr_clears (x1, x2, y1, y2, (mpfr_ptr) 0);
++ }
++
++ set_emax (old_emax);
++}
++
++/* Bug in mpfr_pow_general in precision 1 in the particular case of
++ rounding to nearest, z * 2^k = 2^(emin - 2) and real result larger
++ than this value; fixed in ff5012b61d5e5fee5156c57b8aa8fc1739c2a771
++ (which is simplified in 4f5de980be290687ac1409aa02873e9e0dd1a030);
++ initially found by ofuf_thresholds (though the test was incorrect).
++ With a 32-bit exponent, failure for i=0.
++ With a 64-bit exponent, failure for i=1.
++ The result was correct, but the underflow flag was missing.
++ Note: ofuf_thresholds was added to the master branch, but for the
++ time being, there are issues with these tests.
++*/
++static void
++bug20230427 (void)
++{
++ const char *s[2] = {
++ "-0.1001101000100000100110101000011E29",
++ "-0.100110100010000010011010100001001111101111001111111101111001101E61"
++ };
++ mpfr_t x, y, z, t1, t2;
++ mpfr_exp_t old_emin;
++ mpfr_flags_t flags, ex_flags;
++ int i, inex;
++
++ old_emin = mpfr_get_emin ();
++
++ mpfr_init2 (x, 63);
++ mpfr_inits2 (1, y, z, (mpfr_ptr) 0);
++ mpfr_inits2 (128, t1, t2, (mpfr_ptr) 0);
++
++ for (i = 0; i < 2; i++)
++ {
++ if (i == 0)
++ {
++ /* Basic check: the default emin should be -2^30 (exactly). */
++ if (mpfr_get_emin () != -1073741823)
++ abort ();
++ }
++ else
++ {
++ /* This test assumes that MPFR_EMIN_MIN = -2^62 (exactly).
++ The "0UL" ensures that the shifts are valid. */
++ if ((((0UL - MPFR_EMIN_MIN) >> 31) >> 30) != 1)
++ break;
++
++ set_emin (MPFR_EMIN_MIN);
++ }
++
++ mpfr_set_str_binary (x, s[i]);
++
++ /* We will test 10^x rounded to nearest in precision 1.
++ Check that 2^(emin - 2) < 10^x < (3/2) * 2^(emin - 2).
++ This is approximate, but by outputting the values, one can check
++ that one is not too close to the boundaries:
++ emin - 2 = -4611686018427387905
++ log2(10^x) ~= -4611686018427387904.598
++ emin - 2 + log2(3/2) ~= -4611686018427387904.415
++ Thus the result should be the smallest positive number 2^(emin - 1)
++ because 10^x is closer to this number than to 0, the midpoint being
++ 2^(emin - 2). And there should be an underflow in precision 1 because
++ the result rounded to nearest in an unbounded exponent range should
++ have been 2^(emin - 2), the midpoint being (3/2) * 2^(emin - 2).
++ */
++ mpfr_set_ui (t1, 10, MPFR_RNDN);
++ mpfr_log2 (t2, t1, MPFR_RNDN);
++ mpfr_mul (t1, t2, x, MPFR_RNDN);
++ inex = mpfr_set_exp_t (t2, mpfr_get_emin () - 2, MPFR_RNDN);
++ MPFR_ASSERTN (inex == 0);
++ MPFR_ASSERTN (mpfr_greater_p (t1, t2)); /* log2(10^x) > emin - 2 */
++ inex = mpfr_sub (t1, t1, t2, MPFR_RNDN);
++ MPFR_ASSERTN (inex == 0);
++ mpfr_set_ui (t2, 3, MPFR_RNDN);
++ mpfr_log2 (t2, t2, MPFR_RNDN);
++ mpfr_sub_ui (t2, t2, 1, MPFR_RNDN); /* log2(3/2) */
++ MPFR_ASSERTN (mpfr_less_p (t1, t2));
++
++ mpfr_clear_flags ();
++ mpfr_exp10 (y, x, MPFR_RNDN);
++ flags = __gmpfr_flags;
++ ex_flags = MPFR_FLAGS_UNDERFLOW | MPFR_FLAGS_INEXACT;
++
++ mpfr_setmin (z, mpfr_get_emin ()); /* z = 0.1@emin */
++ if (! (mpfr_equal_p (y, z) && flags == ex_flags))
++ {
++ printf ("Error in bug20230427 for i=%d\n", i);
++ printf ("expected "); mpfr_dump (z);
++ printf ("got "); mpfr_dump (y);
++ printf ("emin = %" MPFR_EXP_FSPEC "d\n",
++ (mpfr_eexp_t) mpfr_get_emin ());
++ printf ("expected flags =");
++ flags_out (ex_flags);
++ printf ("got flags =");
++ flags_out (flags);
++ exit (1);
++ }
++ }
++
++ mpfr_clears (x, y, z, t1, t2, (mpfr_ptr) 0);
++ set_emin (old_emin);
++}
++
+ int
+ main (int argc, char *argv[])
+ {
+@@ -199,6 +380,9 @@
+
+ tests_start_mpfr ();
+
++ bug20230213 ();
++ bug20230427 ();
++
+ special_overflow ();
+ emax_m_eps ();
+ exp_range ();
+diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
+--- mpfr-4.2.0-a/PATCHES 2023-05-17 17:17:28.512360351 +0000
++++ mpfr-4.2.0-b/PATCHES 2023-05-17 17:17:28.600360192 +0000
+@@ -0,0 +1 @@
++compound
+diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
+--- mpfr-4.2.0-a/VERSION 2023-05-12 15:08:39.325546612 +0000
++++ mpfr-4.2.0-b/VERSION 2023-05-17 17:17:28.600360192 +0000
+@@ -1 +1 @@
+-4.2.0-p7
++4.2.0-p8
+diff -Naurd mpfr-4.2.0-a/src/compound.c mpfr-4.2.0-b/src/compound.c
+--- mpfr-4.2.0-a/src/compound.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/src/compound.c 2023-05-17 17:17:28.588360213 +0000
+@@ -55,9 +55,9 @@
+ mpfr_compound_si (mpfr_ptr y, mpfr_srcptr x, long n, mpfr_rnd_t rnd_mode)
+ {
+ int inexact, compared, k, nloop;
+- mpfr_t t;
+- mpfr_exp_t e;
+- mpfr_prec_t prec;
++ mpfr_t t, u;
++ mpfr_prec_t py, prec, extra;
++ mpfr_rnd_t rnd1;
+ MPFR_ZIV_DECL (loop);
+ MPFR_SAVE_EXPO_DECL (expo);
+
+@@ -136,64 +136,185 @@
+
+ MPFR_SAVE_EXPO_MARK (expo);
+
+- prec = MPFR_PREC(y);
+- prec += MPFR_INT_CEIL_LOG2 (prec) + 6;
++ py = MPFR_GET_PREC (y);
++ prec = py + MPFR_INT_CEIL_LOG2 (py) + 6;
+
+ mpfr_init2 (t, prec);
++ mpfr_init2 (u, prec);
+
+ k = MPFR_INT_CEIL_LOG2(SAFE_ABS (unsigned long, n)); /* thus |n| <= 2^k */
+
++ /* We compute u=log2p1(x) with prec+extra bits, since we lose some bits
++ in 2^u. */
++ extra = 0;
++ rnd1 = VSIGN (n) == MPFR_SIGN (x) ? MPFR_RNDD : MPFR_RNDU;
++
+ MPFR_ZIV_INIT (loop, prec);
+ for (nloop = 0; ; nloop++)
+ {
+- /* we compute (1+x)^n as 2^(n*log2p1(x)) */
+- inexact = mpfr_log2p1 (t, x, MPFR_RNDN) != 0;
+- e = MPFR_GET_EXP(t);
+- /* |t - log2(1+x)| <= 1/2*ulp(t) = 2^(e-prec-1) */
+- inexact |= mpfr_mul_si (t, t, n, MPFR_RNDN) != 0;
+- /* |t - n*log2(1+x)| <= 2^(e2-prec-1) + |n|*2^(e-prec-1)
+- <= 2^(e2-prec-1) + 2^(e+k-prec-1) <= 2^(e+k-prec)
+- where |n| <= 2^k, and e2 is the new exponent of t. */
+- MPFR_ASSERTD(MPFR_GET_EXP(t) <= e + k);
+- e += k;
+- /* |t - n*log2(1+x)| <= 2^(e-prec) */
+- /* detect overflow */
+- if (nloop == 0 && mpfr_cmp_si (t, __gmpfr_emax) >= 0)
++ unsigned int inex;
++ mpfr_exp_t e, e2, ex;
++ mpfr_prec_t precu = MPFR_ADD_PREC (prec, extra);
++ mpfr_prec_t new_extra;
++ mpfr_rnd_t rnd2;
++
++ /* We compute (1+x)^n as 2^(n*log2p1(x)),
++ and we round toward 1, thus we round n*log2p1(x) toward 0,
++ thus for x*n > 0 we round log2p1(x) toward -Inf, and for x*n < 0
++ we round log2p1(x) toward +Inf. */
++ inex = mpfr_log2p1 (u, x, rnd1) != 0;
++ e = MPFR_GET_EXP (u);
++ /* |u - log2(1+x)| <= ulp(t) = 2^(e-precu) */
++ inex |= mpfr_mul_si (u, u, n, MPFR_RNDZ) != 0;
++ e2 = MPFR_GET_EXP (u);
++ /* |u - n*log2(1+x)| <= 2^(e2-precu) + |n|*2^(e-precu)
++ <= 2^(e2-precu) + 2^(e+k-precu) <= 2^(e+k+1-precu)
++ where |n| <= 2^k, and e2 is the new exponent of u. */
++ MPFR_ASSERTD (e2 <= e + k);
++ e += k + 1;
++ MPFR_ASSERTN (e2 <= MPFR_PREC_MAX);
++ new_extra = e2 > 0 ? e2 : 0;
++ /* |u - n*log2(1+x)| <= 2^(e-precu) */
++ /* detect overflow: since we rounded n*log2p1(x) toward 0,
++ if n*log2p1(x) >= __gmpfr_emax, we are sure there is overflow. */
++ if (mpfr_cmp_si (u, __gmpfr_emax) >= 0)
+ {
+ MPFR_ZIV_FREE (loop);
+ mpfr_clear (t);
++ mpfr_clear (u);
+ MPFR_SAVE_EXPO_FREE (expo);
+ return mpfr_overflow (y, rnd_mode, 1);
+ }
+- /* detect underflow */
+- if (nloop == 0 && mpfr_cmp_si (t, __gmpfr_emin - 1) <= 0)
++ /* detect underflow: similarly, since we rounded n*log2p1(x) toward 0,
++ if n*log2p1(x) < __gmpfr_emin-1, we are sure there is underflow. */
++ if (mpfr_cmp_si (u, __gmpfr_emin - 1) < 0)
+ {
+ MPFR_ZIV_FREE (loop);
+ mpfr_clear (t);
++ mpfr_clear (u);
+ MPFR_SAVE_EXPO_FREE (expo);
+ return mpfr_underflow (y,
+- (rnd_mode == MPFR_RNDN) ? MPFR_RNDZ : rnd_mode, 1);
++ rnd_mode == MPFR_RNDN ? MPFR_RNDZ : rnd_mode, 1);
+ }
+ /* Detect cases where result is 1 or 1+ulp(1) or 1-1/2*ulp(1):
+- |2^t - 1| = |exp(t*log(2)) - 1| <= |t|*log(2) < |t| */
+- if (nloop == 0 && MPFR_GET_EXP(t) < - (mpfr_exp_t) MPFR_PREC(y))
++ |2^u - 1| = |exp(u*log(2)) - 1| <= |u|*log(2) < |u| */
++ if (nloop == 0 && MPFR_GET_EXP(u) < - py)
+ {
+- /* since ulp(1) = 2^(1-PREC(y)), we have |t| < 1/4*ulp(1) */
++ /* since ulp(1) = 2^(1-py), we have |u| < 1/4*ulp(1) */
+ /* mpfr_compound_near_one must be called in the extended
+ exponent range, so that 1 is representable. */
+- inexact = mpfr_compound_near_one (y, MPFR_SIGN (t), rnd_mode);
++ inexact = mpfr_compound_near_one (y, MPFR_SIGN (u), rnd_mode);
+ goto end;
+ }
+- inexact |= mpfr_exp2 (t, t, MPFR_RNDA) != 0;
+- /* |t - (1+x)^n| <= ulp(t) + |t|*log(2)*2^(e-prec)
+- < 2^(EXP(t)-prec) + 2^(EXP(t)+e-prec) */
+- e = (e >= 0) ? e + 1 : 1;
++ /* FIXME: mpfr_exp2 could underflow to the smallest positive number
++ since MPFR_RNDA is used, and this case will not be detected by
++ MPFR_CAN_ROUND (see BUGS). Either fix that, or do early underflow
++ detection (which may be necessary). */
++ /* round 2^u toward 1 */
++ rnd2 = MPFR_IS_POS (u) ? MPFR_RNDD : MPFR_RNDU;
++ inex |= mpfr_exp2 (t, u, rnd2) != 0;
++ /* we had |u - n*log2(1+x)| < 2^(e-precu)
++ thus u = n*log2(1+x) + delta with |delta| < 2^(e-precu)
++ then 2^u = (1+x)^n * 2^delta with |delta| < 2^(e-precu).
++ For |delta| < 0.5, |2^delta - 1| <= |delta| thus
++ |t - (1+x)^n| <= ulp(t) + |t|*2^(e-precu)
++ < 2^(EXP(t)-prec) + 2^(EXP(t)+e-precu) */
++ e = (precu - prec >= e) ? 1 : e + 1 - (precu - prec);
+ /* now |t - (1+x)^n| < 2^(EXP(t)+e-prec) */
+
+- if (MPFR_LIKELY (inexact == 0 ||
+- MPFR_CAN_ROUND (t, prec - e, MPFR_PREC(y), rnd_mode)))
++ if (MPFR_LIKELY (!inex || MPFR_CAN_ROUND (t, prec - e, py, rnd_mode)))
+ break;
+
++ /* If t fits in the target precision (or with 1 more bit), then we can
++ round, assuming the working precision is large enough, but the above
++ MPFR_CAN_ROUND() will fail because we cannot determine the ternary
++ value. However since we rounded t toward 1, we can determine it.
++ Since the error in the approximation t is at most 2^e ulp(t),
++ this error should be less than 1/2 ulp(y), thus we should have
++ prec - py >= e + 1. */
++ if (mpfr_min_prec (t) <= py + 1 && prec - py >= e + 1)
++ {
++ /* we add/subtract one ulp to get the correct rounding */
++ if (rnd2 == MPFR_RNDD) /* t was rounded downwards */
++ mpfr_nextabove (t);
++ else
++ mpfr_nextbelow (t);
++ break;
++ }
++
++ /* Detect particular cases where Ziv's strategy may take too much
++ memory and be too long, i.e. when x^n fits in the target precision
++ (+ 1 additional bit for rounding to nearest) and the exact result
++ (1+x)^n is very close to x^n.
++ Necessarily, x is a large even integer and n > 0 (thus n > 1).
++ Since this does not depend on the working precision, we only
++ check this at the first iteration (nloop == 0).
++ Hence the first "if" below and the kx < ex test of the second "if"
++ (x is an even integer iff its least bit 1 has exponent >= 1).
++ The second test of the second "if" corresponds to another simple
++ condition that implies that x^n fits in the target precision.
++ Here are the details:
++ Let k be the minimum length of the significand of x, and x' the odd
++ (integer) significand of x. This means that 2^(k-1) <= x' < 2^k.
++ Thus 2^(n*(k-1)) <= (x')^n < 2^(k*n), and x^n has between n*(k-1)+1
++ and k*n bits. So x^n can fit into p bits only if p >= n*(k-1)+1,
++ i.e. n*(k-1) <= p-1.
++ Note that x >= 2^k, so that x^n >= 2^(k*n). Since raw overflow
++ has already been detected, k*n cannot overflow if computed with
++ the mpfr_exp_t type. Hence the second test of the second "if",
++ which cannot overflow. */
++ MPFR_ASSERTD (n < 0 || n > 1);
++ if (nloop == 0 && n > 1 && (ex = MPFR_GET_EXP (x)) >= 17)
++ {
++ mpfr_prec_t kx = mpfr_min_prec (x);
++ mpfr_prec_t p = py + (rnd_mode == MPFR_RNDN);
++
++ MPFR_LOG_MSG (("Check if x^n fits... n=%ld kx=%Pd p=%Pd\n",
++ n, kx, p));
++ if (kx < ex && n * (mpfr_exp_t) (kx - 1) <= p - 1)
++ {
++ mpfr_t v;
++
++ /* Check whether x^n really fits into p bits. */
++ mpfr_init2 (v, p);
++ inexact = mpfr_pow_ui (v, x, n, MPFR_RNDZ);
++ if (inexact == 0)
++ {
++ MPFR_LOG_MSG (("x^n fits into p bits\n", 0));
++ /* (x+1)^n = x^n * (1 + 1/x)^n
++ For directed rounding, we can round when (1 + 1/x)^n
++ < 1 + 2^-p, and then the result is x^n,
++ except for rounding up. Indeed, if (1 + 1/x)^n < 1 + 2^-p,
++ 1 <= (x+1)^n < x^n * (1 + 2^-p) = x^n + x^n/2^p
++ < x^n + ulp(x^n).
++ For rounding to nearest, we can round when (1 + 1/x)^n
++ < 1 + 2^-p, and then the result is x^n when x^n fits
++ into p-1 bits, and nextabove(x^n) otherwise. */
++ mpfr_ui_div (t, 1, x, MPFR_RNDU);
++ mpfr_add_ui (t, t, 1, MPFR_RNDU);
++ mpfr_pow_ui (t, t, n, MPFR_RNDU);
++ mpfr_sub_ui (t, t, 1, MPFR_RNDU);
++ /* t cannot be zero */
++ if (MPFR_GET_EXP(t) < - py)
++ {
++ mpfr_set (y, v, MPFR_RNDZ);
++ if ((rnd_mode == MPFR_RNDN && mpfr_min_prec (v) == p)
++ || rnd_mode == MPFR_RNDU || rnd_mode == MPFR_RNDA)
++ {
++ /* round up */
++ mpfr_nextabove (y);
++ inexact = 1;
++ }
++ else
++ inexact = -1;
++ mpfr_clear (v);
++ goto end;
++ }
++ }
++ mpfr_clear (v);
++ }
++ }
++
+ /* Exact cases like compound(0.5,2) = 9/4 must be detected, since
+ except for 1+x power of 2, the log2p1 above will be inexact,
+ so that in the Ziv test, inexact != 0 and MPFR_CAN_ROUND will
+@@ -211,6 +332,8 @@
+
+ MPFR_ZIV_NEXT (loop, prec);
+ mpfr_set_prec (t, prec);
++ extra = new_extra;
++ mpfr_set_prec (u, MPFR_ADD_PREC (prec, extra));
+ }
+
+ inexact = mpfr_set (y, t, rnd_mode);
+@@ -218,6 +341,7 @@
+ end:
+ MPFR_ZIV_FREE (loop);
+ mpfr_clear (t);
++ mpfr_clear (u);
+
+ MPFR_SAVE_EXPO_FREE (expo);
+ return mpfr_check_range (y, inexact, rnd_mode);
+diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
+--- mpfr-4.2.0-a/src/mpfr.h 2023-05-12 15:08:39.321546616 +0000
++++ mpfr-4.2.0-b/src/mpfr.h 2023-05-17 17:17:28.596360199 +0000
+@@ -27,7 +27,7 @@
+ #define MPFR_VERSION_MAJOR 4
+ #define MPFR_VERSION_MINOR 2
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "4.2.0-p7"
++#define MPFR_VERSION_STRING "4.2.0-p8"
+
+ /* User macros:
+ MPFR_USE_FILE: Define it to make MPFR define functions dealing
+diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
+--- mpfr-4.2.0-a/src/version.c 2023-05-12 15:08:39.325546612 +0000
++++ mpfr-4.2.0-b/src/version.c 2023-05-17 17:17:28.600360192 +0000
+@@ -25,5 +25,5 @@
+ const char *
+ mpfr_get_version (void)
+ {
+- return "4.2.0-p7";
++ return "4.2.0-p8";
+ }
+diff -Naurd mpfr-4.2.0-a/tests/tcompound.c mpfr-4.2.0-b/tests/tcompound.c
+--- mpfr-4.2.0-a/tests/tcompound.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/tcompound.c 2023-05-17 17:17:28.588360213 +0000
+@@ -238,18 +238,263 @@
+ mpfr_clear (y);
+ }
+
+-static int
+-mpfr_compound2 (mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
++/* Failure with mpfr_compound_si from 2021-02-15 due to
++ incorrect underflow detection. */
++static void
++bug_20230206 (void)
+ {
+- return mpfr_compound_si (y, x, 2, rnd_mode);
++ if (MPFR_PREC_MIN == 1)
++ {
++ mpfr_t x, y1, y2;
++ int inex1, inex2;
++ mpfr_flags_t flags1, flags2;
++#if MPFR_PREC_BITS >= 64
++ mpfr_exp_t emin;
++#endif
++
++ mpfr_inits2 (1, x, y1, y2, (mpfr_ptr) 0);
++ mpfr_set_ui_2exp (x, 1, -1, MPFR_RNDN); /* x = 1/2 */
++
++ /* This first test is useful mainly for a 32-bit mpfr_exp_t type
++ (no failure with a 64-bit mpfr_exp_t type since the underflow
++ threshold in the extended exponent range is much lower). */
++
++ mpfr_set_ui_2exp (y1, 1, -1072124363, MPFR_RNDN);
++ inex1 = -1;
++ flags1 = MPFR_FLAGS_INEXACT;
++ mpfr_clear_flags ();
++ /* -1832808704 ~= -2^30 / log2(3/2) */
++ inex2 = mpfr_compound_si (y2, x, -1832808704, MPFR_RNDN);
++ flags2 = __gmpfr_flags;
++ if (!(mpfr_equal_p (y1, y2) &&
++ SAME_SIGN (inex1, inex2) &&
++ flags1 == flags2))
++ {
++ printf ("Error in bug_20230206 (1):\n");
++ printf ("Expected ");
++ mpfr_dump (y1);
++ printf (" with inex = %d, flags =", inex1);
++ flags_out (flags1);
++ printf ("Got ");
++ mpfr_dump (y2);
++ printf (" with inex = %d, flags =", inex2);
++ flags_out (flags2);
++ exit (1);
++ }
++
++ /* This second test is for a 64-bit mpfr_exp_t type
++ (it is disabled with a 32-bit mpfr_exp_t type). */
++
++ /* The "#if" makes sure that 64-bit constants are supported, avoiding
++ a compilation failure. The "if" makes sure that the constant is
++ representable in a long (this would not be the case with 32-bit
++ unsigned long and 64-bit limb). It also ensures that mpfr_exp_t
++ has at least 64 bits. */
++#if MPFR_PREC_BITS >= 64
++ emin = mpfr_get_emin ();
++ set_emin (MPFR_EMIN_MIN);
++ mpfr_set_ui_2exp (y1, 1, -4611686018427366846, MPFR_RNDN);
++ inex1 = 1;
++ flags1 = MPFR_FLAGS_INEXACT;
++ mpfr_clear_flags ();
++ /* -7883729320669216768 ~= -2^62 / log2(3/2) */
++ inex2 = mpfr_compound_si (y2, x, -7883729320669216768, MPFR_RNDN);
++ flags2 = __gmpfr_flags;
++ if (!(mpfr_equal_p (y1, y2) &&
++ SAME_SIGN (inex1, inex2) &&
++ flags1 == flags2))
++ {
++ printf ("Error in bug_20230206 (2):\n");
++ printf ("Expected ");
++ mpfr_dump (y1);
++ printf (" with inex = %d, flags =", inex1);
++ flags_out (flags1);
++ printf ("Got ");
++ mpfr_dump (y2);
++ printf (" with inex = %d, flags =", inex2);
++ flags_out (flags2);
++ exit (1);
++ }
++ set_emin (emin);
++#endif
++
++ mpfr_clears (x, y1, y2, (mpfr_ptr) 0);
++ }
+ }
+
++/* Reported by Patrick Pelissier on 2023-02-11 for the master branch
++ (tgeneric_ui.c with GMP_CHECK_RANDOMIZE=1412991715).
++ On a 32-bit host, one gets Inf (overflow) instead of 0.1E1071805703.
++*/
++static void
++bug_20230211 (void)
++{
++ mpfr_t x, y1, y2;
++ int inex1, inex2;
++ mpfr_flags_t flags1, flags2;
++
++ mpfr_inits2 (1, x, y1, y2, (mpfr_ptr) 0);
++ mpfr_set_ui_2exp (x, 1, -1, MPFR_RNDN); /* x = 1/2 */
++ mpfr_set_ui_2exp (y1, 1, 1071805702, MPFR_RNDN);
++ inex1 = 1;
++ flags1 = MPFR_FLAGS_INEXACT;
++ mpfr_clear_flags ();
++ inex2 = mpfr_compound_si (y2, x, 1832263949, MPFR_RNDN);
++ flags2 = __gmpfr_flags;
++ if (!(mpfr_equal_p (y1, y2) &&
++ SAME_SIGN (inex1, inex2) &&
++ flags1 == flags2))
++ {
++ printf ("Error in bug_20230211:\n");
++ printf ("Expected ");
++ mpfr_dump (y1);
++ printf (" with inex = %d, flags =", inex1);
++ flags_out (flags1);
++ printf ("Got ");
++ mpfr_dump (y2);
++ printf (" with inex = %d, flags =", inex2);
++ flags_out (flags2);
++ exit (1);
++ }
++ mpfr_clears (x, y1, y2, (mpfr_ptr) 0);
++}
++
++/* Integer overflow with compound.c d04caeae04c6a83276916c4fbac1fe9b0cec3c8b
++ (2023-02-23) or 952fb0f5cc2df1fffde3eb54c462fdae5f123ea6 in the 4.2 branch
++ on "n * (kx - 1) + 1". Note: if the only effect is just a random value,
++ this probably doesn't affect the result (one might enter the "if" while
++ one shouldn't, but the real check is done inside the "if"). This test
++ fails if -fsanitize=undefined -fno-sanitize-recover is used or if the
++ processor emits a signal in case of integer overflow.
++ This test has been made obsolete by the "kx < ex" condition
++ in 2cb3123891dd46fe0258d4aec7f8655b8ec69aaf (master branch)
++ or f5cb40571bc3d1559f05b230cf4ffecaf0952852 (4.2 branch). */
++static void
++bug_20230517 (void)
++{
++ mpfr_exp_t old_emax;
++ mpfr_t x;
++
++ old_emax = mpfr_get_emax ();
++ set_emax (MPFR_EMAX_MAX);
++
++ mpfr_init2 (x, 123456);
++ mpfr_set_ui (x, 65536, MPFR_RNDN);
++ mpfr_nextabove (x);
++ mpfr_compound_si (x, x, LONG_MAX >> 16, MPFR_RNDN);
++ mpfr_clear (x);
++
++ set_emax (old_emax);
++}
++
++/* Inverse function on non-special cases...
++ One has x = (1+y)^n with y > -1 and x > 0. Thus y = x^(1/n) - 1.
++ The inverse function is useful
++ - to build and check hard-to-round cases (see bad_cases() in tests.c);
++ - to test the behavior close to the overflow and underflow thresholds.
++ The case x = 0 actually needs to be handled as it may occur with
++ bad_cases() due to rounding.
++*/
+ static int
+-mpfr_compound3 (mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
++inv_compound (mpfr_ptr y, mpfr_srcptr x, long n, mpfr_rnd_t rnd_mode)
+ {
+- return mpfr_compound_si (y, x, 3, rnd_mode);
++ mpfr_t t;
++ int inexact;
++ mpfr_prec_t precy, prect;
++ MPFR_ZIV_DECL (loop);
++ MPFR_SAVE_EXPO_DECL (expo);
++
++ MPFR_ASSERTN (n != 0);
++
++ if (MPFR_UNLIKELY (MPFR_IS_ZERO (x)))
++ {
++ if (n > 0)
++ return mpfr_set_si (y, -1, rnd_mode);
++ else
++ {
++ MPFR_SET_INF (y);
++ MPFR_SET_POS (y);
++ MPFR_RET (0);
++ }
++ }
++
++ MPFR_SAVE_EXPO_MARK (expo);
++
++ if (mpfr_equal_p (x, __gmpfr_one))
++ {
++ MPFR_SAVE_EXPO_FREE (expo);
++ mpfr_set_zero (y, 1);
++ MPFR_RET (0);
++ }
++
++ precy = MPFR_GET_PREC (y);
++ prect = precy + 20;
++ mpfr_init2 (t, prect);
++
++ MPFR_ZIV_INIT (loop, prect);
++ for (;;)
++ {
++ mpfr_exp_t expt1, expt2, err;
++ unsigned int inext;
++
++ if (mpfr_rootn_si (t, x, n, MPFR_RNDN) == 0)
++ {
++ /* With a huge t, this case would yield inext != 0 and a
++ MPFR_CAN_ROUND failure until a huge precision is reached
++ (as the result is very close to an exact point). Fortunately,
++ since t is exact, we can obtain the correctly rounded result
++ by doing the second operation to the target precision directly.
++ */
++ inexact = mpfr_sub_ui (y, t, 1, rnd_mode);
++ goto end;
++ }
++ expt1 = MPFR_GET_EXP (t);
++ /* |error| <= 2^(expt1-prect-1) */
++ inext = mpfr_sub_ui (t, t, 1, MPFR_RNDN);
++ if (MPFR_UNLIKELY (MPFR_IS_ZERO (t)))
++ goto cont; /* cannot round yet */
++ expt2 = MPFR_GET_EXP (t);
++ err = 1;
++ if (expt2 < expt1)
++ err += expt1 - expt2;
++ /* |error(rootn)| <= 2^(err+expt2-prect-2)
++ and if mpfr_sub_ui is inexact:
++ |error| <= 2^(err+expt2-prect-2) + 2^(expt2-prect-1)
++ <= (2^(err-1) + 1) * 2^(expt2-prect-1)
++ <= 2^((err+1)+expt2-prect-2) */
++ if (inext)
++ err++;
++ /* |error| <= 2^(err+expt2-prect-2) */
++ if (MPFR_CAN_ROUND (t, prect + 2 - err, precy, rnd_mode))
++ break;
++
++ cont:
++ MPFR_ZIV_NEXT (loop, prect);
++ mpfr_set_prec (t, prect);
++ }
++
++ inexact = mpfr_set (y, t, rnd_mode);
++
++ end:
++ MPFR_ZIV_FREE (loop);
++ mpfr_clear (t);
++ MPFR_SAVE_EXPO_FREE (expo);
++ return mpfr_check_range (y, inexact, rnd_mode);
+ }
+
++#define DEFN(N) \
++ static int mpfr_compound##N (mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t r) \
++ { return mpfr_compound_si (y, x, N, r); } \
++ static int inv_compound##N (mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t r) \
++ { return inv_compound (y, x, N, r); }
++
++DEFN(2)
++DEFN(3)
++DEFN(4)
++DEFN(5)
++DEFN(17)
++DEFN(120)
++
+ #define TEST_FUNCTION mpfr_compound2
+ #define test_generic test_generic_compound2
+ #include "tgeneric.c"
+@@ -258,17 +503,55 @@
+ #define test_generic test_generic_compound3
+ #include "tgeneric.c"
+
++#define TEST_FUNCTION mpfr_compound4
++#define test_generic test_generic_compound4
++#include "tgeneric.c"
++
++#define TEST_FUNCTION mpfr_compound5
++#define test_generic test_generic_compound5
++#include "tgeneric.c"
++
++#define TEST_FUNCTION mpfr_compound17
++#define test_generic test_generic_compound17
++#include "tgeneric.c"
++
++#define TEST_FUNCTION mpfr_compound120
++#define test_generic test_generic_compound120
++#include "tgeneric.c"
++
+ int
+ main (void)
+ {
+ tests_start_mpfr ();
+
+ check_ieee754 ();
++ bug_20230206 ();
++ bug_20230211 ();
++ bug_20230517 ();
+
+ test_generic_si (MPFR_PREC_MIN, 100, 100);
+
+ test_generic_compound2 (MPFR_PREC_MIN, 100, 100);
+ test_generic_compound3 (MPFR_PREC_MIN, 100, 100);
++ test_generic_compound4 (MPFR_PREC_MIN, 100, 100);
++ test_generic_compound5 (MPFR_PREC_MIN, 100, 100);
++ test_generic_compound17 (MPFR_PREC_MIN, 100, 100);
++ test_generic_compound120 (MPFR_PREC_MIN, 100, 100);
++
++ /* Note: For small n, we need a psup high enough to avoid too many
++ "f exact while f^(-1) inexact" occurrences in bad_cases(). */
++ bad_cases (mpfr_compound2, inv_compound2, "mpfr_compound2",
++ 0, -256, 255, 4, 128, 240, 40);
++ bad_cases (mpfr_compound3, inv_compound3, "mpfr_compound3",
++ 0, -256, 255, 4, 128, 120, 40);
++ bad_cases (mpfr_compound4, inv_compound4, "mpfr_compound4",
++ 0, -256, 255, 4, 128, 80, 40);
++ bad_cases (mpfr_compound5, inv_compound5, "mpfr_compound5",
++ 0, -256, 255, 4, 128, 80, 40);
++ bad_cases (mpfr_compound17, inv_compound17, "mpfr_compound17",
++ 0, -256, 255, 4, 128, 80, 40);
++ bad_cases (mpfr_compound120, inv_compound120, "mpfr_compound120",
++ 0, -256, 255, 4, 128, 80, 40);
+
+ tests_end_mpfr ();
+ return 0;
+diff -Naurd mpfr-4.2.0-a/tests/tests.c mpfr-4.2.0-b/tests/tests.c
+--- mpfr-4.2.0-a/tests/tests.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/tests/tests.c 2023-05-17 17:17:28.588360213 +0000
+@@ -1086,10 +1086,9 @@
+ }
+ if (inex_inv)
+ {
+- printf ("bad_cases: f exact while f^(-1) inexact,\n"
+- "due to a poor choice of the parameters.\n");
+- exit (1);
+- /* alternatively, goto next_i */
++ if (dbg)
++ printf ("bad_cases: f exact while f^(-1) inexact\n");
++ goto does_not_match;
+ }
+ inex = 0;
+ break;
+@@ -1112,6 +1111,10 @@
+ if (mpfr_nanflag_p () || mpfr_overflow_p () || mpfr_underflow_p ()
+ || ! mpfr_equal_p (z, y))
+ {
++ /* This may occur when psup is not large enough: evaluating
++ x = (f^(-1))(y) then z = f(x) may not give back y if the
++ precision of x is too small. */
++ does_not_match:
+ if (dbg)
+ {
+ printf ("bad_cases: inverse doesn't match for %s\ny = ",
+diff -Naurd mpfr-4.2.0-a/PATCHES mpfr-4.2.0-b/PATCHES
+--- mpfr-4.2.0-a/PATCHES 2023-05-17 17:19:35.484201703 +0000
++++ mpfr-4.2.0-b/PATCHES 2023-05-17 17:19:35.596201603 +0000
+@@ -0,0 +1 @@
++printf_large_prec_for_g
+diff -Naurd mpfr-4.2.0-a/VERSION mpfr-4.2.0-b/VERSION
+--- mpfr-4.2.0-a/VERSION 2023-05-17 17:17:28.600360192 +0000
++++ mpfr-4.2.0-b/VERSION 2023-05-17 17:19:35.596201603 +0000
+@@ -1 +1 @@
+-4.2.0-p8
++4.2.0-p9
+diff -Naurd mpfr-4.2.0-a/src/mpfr.h mpfr-4.2.0-b/src/mpfr.h
+--- mpfr-4.2.0-a/src/mpfr.h 2023-05-17 17:17:28.596360199 +0000
++++ mpfr-4.2.0-b/src/mpfr.h 2023-05-17 17:19:35.592201606 +0000
+@@ -27,7 +27,7 @@
+ #define MPFR_VERSION_MAJOR 4
+ #define MPFR_VERSION_MINOR 2
+ #define MPFR_VERSION_PATCHLEVEL 0
+-#define MPFR_VERSION_STRING "4.2.0-p8"
++#define MPFR_VERSION_STRING "4.2.0-p9"
+
+ /* User macros:
+ MPFR_USE_FILE: Define it to make MPFR define functions dealing
+diff -Naurd mpfr-4.2.0-a/src/vasprintf.c mpfr-4.2.0-b/src/vasprintf.c
+--- mpfr-4.2.0-a/src/vasprintf.c 2023-01-05 17:09:48.000000000 +0000
++++ mpfr-4.2.0-b/src/vasprintf.c 2023-05-17 17:19:35.576201620 +0000
+@@ -1888,7 +1888,7 @@
+ precision T-1.
+ where T is the threshold computed below and X is the exponent
+ that would be displayed with style 'e' and precision T-1. */
+- int threshold;
++ mpfr_intmax_t threshold;
+ mpfr_exp_t x, e, k;
+ struct decimal_info dec_info;
+
+@@ -1920,9 +1920,15 @@
+ e = e <= 0 ? k : (e + 2) / 3 + (k <= 0 ? 0 : k);
+ MPFR_ASSERTD (e >= 1);
+
++ if (e > threshold)
++ e = threshold;
++
++ /* error if e does not fit in size_t (for mpfr_get_str) */
++ if (e > (size_t) -1)
++ goto error;
++
+ dec_info.str = mpfr_get_str (NULL, &dec_info.exp, 10,
+- e < threshold ? e : threshold,
+- p, spec.rnd_mode);
++ e, p, spec.rnd_mode);
+ register_string (np->sl, dec_info.str);
+ /* mpfr_get_str corresponds to a significand between 0.1 and 1,
+ whereas here we want a significand between 1 and 10. */
+diff -Naurd mpfr-4.2.0-a/src/version.c mpfr-4.2.0-b/src/version.c
+--- mpfr-4.2.0-a/src/version.c 2023-05-17 17:17:28.600360192 +0000
++++ mpfr-4.2.0-b/src/version.c 2023-05-17 17:19:35.592201606 +0000
+@@ -25,5 +25,5 @@
+ const char *
+ mpfr_get_version (void)
+ {
+- return "4.2.0-p8";
++ return "4.2.0-p9";
+ }
+diff -Naurd mpfr-4.2.0-a/tests/tsprintf.c mpfr-4.2.0-b/tests/tsprintf.c
+--- mpfr-4.2.0-a/tests/tsprintf.c 2023-04-17 21:17:39.784645229 +0000
++++ mpfr-4.2.0-b/tests/tsprintf.c 2023-05-17 17:19:35.576201620 +0000
+@@ -1620,6 +1620,30 @@
+ mpfr_clear (x);
+ }
+
++/* On 2023-03-22, on a 64-bit Linux machine (thus with 32-bit int),
++ the case %.2147483648Rg yields an incorrect size computation and
++ MPFR wants to allocate 18446744071562070545 bytes. With assertion
++ checking (--enable-assert), one gets:
++ vasprintf.c:1908: MPFR assertion failed: threshold >= 1
++
++ This case should either succeed or fail as reaching an environmental limit
++ like with glibc (note that the precision does not fit in an int).
++*/
++static void
++large_prec_for_g (void)
++{
++ mpfr_t x;
++ int r;
++
++ mpfr_init2 (x, 128);
++ mpfr_set_ui (x, 1, MPFR_RNDN);
++ r = mpfr_snprintf (NULL, 0, "%.2147483647Rg\n", x);
++ MPFR_ASSERTN (r == 2);
++ r = mpfr_snprintf (NULL, 0, "%.2147483648Rg\n", x);
++ MPFR_ASSERTN (r == 2 || r < 0);
++ mpfr_clear (x);
++}
++
+ #if defined(HAVE_LOCALE_H) && defined(HAVE_SETLOCALE)
+
+ /* The following tests should be equivalent to those from test_locale()
+@@ -1793,6 +1817,7 @@
+ percent_n ();
+ mixed ();
+ check_length_overflow ();
++ large_prec_for_g ();
+ test_locale ();
+
+ if (getenv ("MPFR_CHECK_LIBC_PRINTF"))