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* sysdeps/ieee754/ldbl-128ibm/printf_fphex.c

Browse Source 
(PRINT_FPHEX_LONG_DOUBLE): Fix printing numbers where lower double
	is non-zero, but smaller than 2 * __DBL_MIN__.
	* stdio-common/tst-sprintf2.c: New test.
	* stdio-common/Makefile (tests): Add tst-sprintf2.

	* math/test-misc.c (main): Don't run last batch of tests with
	IBM long double format.
This commit is contained in:
Ulrich Drepper 2007-06-04 14:38:22 +00:00
parent 04067002e8
commit 43b7682843
5 changed files with 96 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
ChangeLog
View File

@ -1,3 +1,14 @@
2007-06-04 Jakub Jelinek <jakub@redhat.com>
* sysdeps/ieee754/ldbl-128ibm/printf_fphex.c
(PRINT_FPHEX_LONG_DOUBLE): Fix printing numbers where lower double
is non-zero, but smaller than 2 * __DBL_MIN__.
* stdio-common/tst-sprintf2.c: New test.
* stdio-common/Makefile (tests): Add tst-sprintf2.
* math/test-misc.c (main): Don't run last batch of tests with
IBM long double format.
2007-05-31 Steven Munroe <sjmunroe@us.ibm.com>
* sysdeps/powerpc/powerpc32/970/fpu/Implies: New file.

7
math/test-misc.c
View File

@ -1235,7 +1235,12 @@ main (void)
}
#endif
#if !defined NO_LONG_DOUBLE && LDBL_MANT_DIG >= DBL_MANT_DIG + 4
/* Skip testing IBM long double format, for 2 reasons:
1) it only supports FE_TONEAREST
2) nextafter (0.0, 1.0) == nextafterl (0.0L, 1.0L), so
nextafter (0.0, 1.0) / 16.0L will be 0.0L. */
#if !defined NO_LONG_DOUBLE && LDBL_MANT_DIG >= DBL_MANT_DIG + 4 \
&& LDBL_MANT_DIG != 106
int oldmode = fegetround ();
int j;
for (j = 0; j < 4; j++)

2
stdio-common/Makefile
View File

@ -54,7 +54,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
tst-swprintf tst-fseek tst-fmemopen test-vfprintf tst-gets \
tst-perror tst-sprintf tst-rndseek tst-fdopen tst-fphex bug14 bug15 \
tst-popen tst-unlockedio tst-fmemopen2 tst-put-error tst-fgets \
tst-fwrite bug16 bug17 tst-swscanf
tst-fwrite bug16 bug17 tst-swscanf tst-sprintf2
test-srcs = tst-unbputc tst-printf

59
stdio-common/tst-sprintf2.c Normal file
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@ -0,0 +1,59 @@
#include <float.h>
#include <math.h>
#include <stdio.h>
int
main (void)
{
volatile union { long double l; long long x[2]; } u;
char buf[64];
int result = 0;
#define TEST(val) \
do \
{ \
u.l = (val); \
snprintf (buf, sizeof buf, "%LaL", u.l); \
if (strcmp (buf, #val) != 0) \
{ \
printf ("Error on line %d: %s != %s\n", __LINE__, buf, #val); \
result = 1; \
} \
/* printf ("%s %La %016Lx %016Lx\n", #val, u.l, u.x[0], u.x[1]); */ \
} \
while (0)
#if LDBL_MANT_DIG >= 106
# if LDBL_MANT_DIG == 106
TEST (0x0.ffffffffffffp-1022L);
TEST (0x0.ffffffffffff1p-1022L);
TEST (0x0.fffffffffffffp-1022L);
# endif
TEST (0x1p-1022L);
TEST (0x1.0000000000001p-1022L);
TEST (0x1.00000000001e7p-1022L);
TEST (0x1.fffffffffffffp-1022L);
TEST (0x1p-1021L);
TEST (0x1.00000000000008p-1021L);
TEST (0x1.0000000000001p-1021L);
TEST (0x1.00000000000018p-1021L);
TEST (0x1.0000000000000f8p-1017L);
TEST (0x1.0000000000001p-1017L);
TEST (0x1.000000000000108p-1017L);
TEST (0x1.000000000000dcf8p-1013L);
TEST (0x1.000000000000ddp-1013L);
TEST (0x1.000000000000dd08p-1013L);
TEST (0x1.ffffffffffffffffffffffffffp-1L);
TEST (0x1.ffffffffffffffffffffffffff8p-1L);
TEST (0x1p+0L);
TEST (0x1.000000000000000000000000008p+0L);
TEST (0x1.00000000000000000000000001p+0L);
TEST (0x1.000000000000000000000000018p+0L);
TEST (0x1.23456789abcdef123456789abc8p+0L);
TEST (0x1.23456789abcde7123456789abc8p+0L);
TEST (0x1.23456789abcdef123456789abc8p+64L);
TEST (0x1.23456789abcde7123456789abc8p+64L);
TEST (0x1.123456789abcdef123456789p-969L);
#endif
return result;
}

35
sysdeps/ieee754/ldbl-128ibm/printf_fphex.c
View File

@ -1,5 +1,5 @@
/* Print floating point number in hexadecimal notation according to ISO C99.
Copyright (C) 1997,1998,1999,2000,2001,2002,2004,2006
Copyright (C) 1997,1998,1999,2000,2001,2002,2004,2006,2007
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@ -35,21 +35,24 @@ do { \
\
lo = ((long long)eldbl.ieee.mantissa2 << 32) | eldbl.ieee.mantissa3; \
hi = ((long long)eldbl.ieee.mantissa0 << 32) | eldbl.ieee.mantissa1; \
/* If the lower double is not a denomal or zero then set the hidden \
53rd bit. */ \
if (eldbl.ieee.exponent2 > 0x001) \
{ \
lo |= (1ULL << 52); \
lo = lo << 7; /* pre-shift lo to match ieee854. */ \
/* The lower double is normalized separately from the upper. We \
may need to adjust the lower manitissa to reflect this. */ \
ediff = eldbl.ieee.exponent - eldbl.ieee.exponent2; \
if (ediff > 53) \
lo = lo >> (ediff-53); \
} \
\
if ((eldbl.ieee.negative != eldbl.ieee.negative2) \
&& ((eldbl.ieee.exponent2 != 0) && (lo != 0L))) \
lo <<= 7; /* pre-shift lo to match ieee854. */ \
/* If the lower double is not a denomal or zero then set the hidden \
53rd bit. */ \
if (eldbl.ieee.exponent2 != 0) \
lo |= (1ULL << (52 + 7)); \
else \
lo <<= 1; \
/* The lower double is normalized separately from the upper. We \
may need to adjust the lower manitissa to reflect this. */ \
ediff = eldbl.ieee.exponent - eldbl.ieee.exponent2; \
if (ediff > 53 + 63) \
lo = 0; \
else if (ediff > 53) \
lo = lo >> (ediff - 53); \
else if (eldbl.ieee.exponent2 == 0 && ediff < 53) \
lo = lo << (53 - ediff); \
if (eldbl.ieee.negative != eldbl.ieee.negative2 \
&& (eldbl.ieee.exponent2 != 0 || lo != 0L)) \
{ \
lo = (1ULL << 60) - lo; \
if (hi == 0L) \