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diff -Naurd mpfr-3.1.3-a/PATCHES mpfr-3.1.3-b/PATCHES
--- mpfr-3.1.3-a/PATCHES 2015-07-17 08:58:21.094987384 +0000
+++ mpfr-3.1.3-b/PATCHES 2015-07-17 08:58:21.118986898 +0000
@@ -0,0 +1 @@
+frexp
diff -Naurd mpfr-3.1.3-a/VERSION mpfr-3.1.3-b/VERSION
--- mpfr-3.1.3-a/VERSION 2015-07-17 08:54:48.616811495 +0000
+++ mpfr-3.1.3-b/VERSION 2015-07-17 08:58:21.118986898 +0000
@@ -1 +1 @@
-3.1.3-p3
+3.1.3-p4
diff -Naurd mpfr-3.1.3-a/src/frexp.c mpfr-3.1.3-b/src/frexp.c
--- mpfr-3.1.3-a/src/frexp.c 2015-06-19 19:55:09.000000000 +0000
+++ mpfr-3.1.3-b/src/frexp.c 2015-07-17 08:58:21.106987142 +0000
@@ -26,6 +26,13 @@
mpfr_frexp (mpfr_exp_t *exp, mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t rnd)
{
int inex;
+ unsigned int saved_flags = __gmpfr_flags;
+ MPFR_BLOCK_DECL (flags);
+
+ MPFR_LOG_FUNC
+ (("x[%Pu]=%.*Rg rnd=%d", mpfr_get_prec (x), mpfr_log_prec, x, rnd),
+ ("y[%Pu]=%.*Rg exp=%" MPFR_EXP_FSPEC "d inex=%d", mpfr_get_prec (y),
+ mpfr_log_prec, y, (mpfr_eexp_t) *exp, inex));
if (MPFR_UNLIKELY(MPFR_IS_SINGULAR(x)))
{
@@ -49,8 +56,32 @@
}
}
- inex = mpfr_set (y, x, rnd);
+ MPFR_BLOCK (flags, inex = mpfr_set (y, x, rnd));
+ __gmpfr_flags = saved_flags;
+
+ /* Possible overflow due to the rounding, no possible underflow. */
+
+ if (MPFR_UNLIKELY (MPFR_OVERFLOW (flags)))
+ {
+ int inex2;
+
+ /* An overflow here means that the exponent of y would be larger than
+ the one of x, thus x would be rounded to the next power of 2, and
+ the returned y should be 1/2 in absolute value, rounded (i.e. with
+ possible underflow or overflow). This also implies that x and y are
+ different objects, so that the exponent of x has not been lost. */
+ MPFR_LOG_MSG (("Internal overflow\n", 0));
+ MPFR_ASSERTD (x != y);
+ *exp = MPFR_GET_EXP (x) + 1;
+ inex2 = mpfr_set_si_2exp (y, MPFR_INT_SIGN (x), -1, rnd);
+ MPFR_LOG_MSG (("inex=%d inex2=%d\n", inex, inex2));
+ if (inex2 != 0)
+ inex = inex2;
+ MPFR_RET (inex);
+ }
+
*exp = MPFR_GET_EXP (y);
- MPFR_SET_EXP (y, 0);
+ /* Do not use MPFR_SET_EXP because the range has not been checked yet. */
+ MPFR_EXP (y) = 0;
return mpfr_check_range (y, inex, rnd);
}
diff -Naurd mpfr-3.1.3-a/src/mpfr.h mpfr-3.1.3-b/src/mpfr.h
--- mpfr-3.1.3-a/src/mpfr.h 2015-07-17 08:54:48.616811495 +0000
+++ mpfr-3.1.3-b/src/mpfr.h 2015-07-17 08:58:21.114986979 +0000
@@ -27,7 +27,7 @@
#define MPFR_VERSION_MAJOR 3
#define MPFR_VERSION_MINOR 1
#define MPFR_VERSION_PATCHLEVEL 3
-#define MPFR_VERSION_STRING "3.1.3-p3"
+#define MPFR_VERSION_STRING "3.1.3-p4"
/* Macros dealing with MPFR VERSION */
#define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.3-a/src/version.c mpfr-3.1.3-b/src/version.c
--- mpfr-3.1.3-a/src/version.c 2015-07-17 08:54:48.616811495 +0000
+++ mpfr-3.1.3-b/src/version.c 2015-07-17 08:58:21.118986898 +0000
@@ -25,5 +25,5 @@
const char *
mpfr_get_version (void)
{
- return "3.1.3-p3";
+ return "3.1.3-p4";
}
diff -Naurd mpfr-3.1.3-a/tests/tfrexp.c mpfr-3.1.3-b/tests/tfrexp.c
--- mpfr-3.1.3-a/tests/tfrexp.c 2015-06-19 19:55:10.000000000 +0000
+++ mpfr-3.1.3-b/tests/tfrexp.c 2015-07-17 08:58:21.106987142 +0000
@@ -129,12 +129,115 @@
mpfr_clear (x);
}
+static void check1 (void)
+{
+ mpfr_exp_t emin, emax, e;
+ mpfr_t x, y1, y2;
+ int r, neg, red;
+
+ emin = mpfr_get_emin ();
+ emax = mpfr_get_emax ();
+ set_emin (MPFR_EMIN_MIN);
+ set_emax (MPFR_EMAX_MAX);
+
+ mpfr_init2 (x, 7);
+ mpfr_inits2 (4, y1, y2, (mpfr_ptr) 0);
+
+ mpfr_set_ui_2exp (x, 1, -2, MPFR_RNDN);
+ while (mpfr_regular_p (x))
+ {
+ /* Test the exponents up to 3 and with the maximum exponent
+ (to check potential intermediate overflow). */
+ if (MPFR_GET_EXP (x) == 4)
+ mpfr_set_exp (x, MPFR_EMAX_MAX);
+ e = MPFR_GET_EXP (x);
+ for (neg = 0; neg < 2; neg++)
+ {
+ RND_LOOP (r)
+ {
+ int inex1, inex2;
+ mpfr_exp_t e1, e2;
+ unsigned int flags1, flags2;
+
+ for (red = 0; red < 2; red++)
+ {
+ if (red)
+ {
+ /* e1: exponent of the rounded value of x. */
+ MPFR_ASSERTN (e1 == e || e1 == e + 1);
+ set_emin (e);
+ set_emax (e);
+ mpfr_clear_flags ();
+ inex1 = e1 < 0 ?
+ mpfr_mul_2ui (y1, x, -e1, (mpfr_rnd_t) r) :
+ mpfr_div_2ui (y1, x, e1, (mpfr_rnd_t) r);
+ flags1 = __gmpfr_flags;
+ }
+ else
+ {
+ inex1 = mpfr_set (y1, x, (mpfr_rnd_t) r);
+ e1 = MPFR_IS_INF (y1) ? e + 1 : MPFR_GET_EXP (y1);
+ flags1 = inex1 != 0 ? MPFR_FLAGS_INEXACT : 0;
+ }
+ mpfr_clear_flags ();
+ inex2 = mpfr_frexp (&e2, y2, x, (mpfr_rnd_t) r);
+ flags2 = __gmpfr_flags;
+ set_emin (MPFR_EMIN_MIN);
+ set_emax (MPFR_EMAX_MAX);
+ if ((!red || e == 0) &&
+ (! mpfr_regular_p (y2) || MPFR_GET_EXP (y2) != 0))
+ {
+ printf ("Error in check1 for %s, red = %d, x = ",
+ mpfr_print_rnd_mode ((mpfr_rnd_t) r), red);
+ mpfr_dump (x);
+ printf ("Expected 1/2 <= |y| < 1, got y = ");
+ mpfr_dump (y2);
+ exit (1);
+ }
+ if (!red)
+ {
+ if (e2 > 0)
+ mpfr_mul_2ui (y2, y2, e2, MPFR_RNDN);
+ else if (e2 < 0)
+ mpfr_div_2ui (y2, y2, -e2, MPFR_RNDN);
+ }
+ if (! (SAME_SIGN (inex1, inex2) &&
+ mpfr_equal_p (y1, y2) &&
+ flags1 == flags2))
+ {
+ printf ("Error in check1 for %s, red = %d, x = ",
+ mpfr_print_rnd_mode ((mpfr_rnd_t) r), red);
+ mpfr_dump (x);
+ printf ("Expected y1 = ");
+ mpfr_dump (y1);
+ printf ("Got y2 = ");
+ mpfr_dump (y2);
+ printf ("Expected inex ~= %d, got %d\n", inex1, inex2);
+ printf ("Expected flags:");
+ flags_out (flags1);
+ printf ("Got flags: ");
+ flags_out (flags2);
+ exit (1);
+ }
+ }
+ }
+ mpfr_neg (x, x, MPFR_RNDN);
+ }
+ mpfr_nextabove (x);
+ }
+
+ mpfr_clears (x, y1, y2, (mpfr_ptr) 0);
+ set_emin (emin);
+ set_emax (emax);
+}
+
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
check_special ();
+ check1 ();
tests_end_mpfr ();
return 0;
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