diff options
Diffstat (limited to 'source/l/mpfr/patches/patch07')
-rw-r--r-- | source/l/mpfr/patches/patch07 | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/source/l/mpfr/patches/patch07 b/source/l/mpfr/patches/patch07 new file mode 100644 index 000000000..922802c5a --- /dev/null +++ b/source/l/mpfr/patches/patch07 @@ -0,0 +1,305 @@ +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 (); |