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author | Mike Frysinger <vapier@gentoo.org> | 2013-03-11 01:20:39 +0000 |
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committer | Mike Frysinger <vapier@gentoo.org> | 2013-03-12 06:00:28 -0400 |
commit | a186dc916c30e5077e092335e6c264d9d18688df (patch) | |
tree | e5e8b317dea1d35628d1ee3a46ae806c67dad173 | |
parent | c5abd7ce01539dc5224f7533c9d1048900992317 (diff) | |
download | glibc-a186dc916c30e5077e092335e6c264d9d18688df.zip glibc-a186dc916c30e5077e092335e6c264d9d18688df.tar.gz glibc-a186dc916c30e5077e092335e6c264d9d18688df.tar.bz2 |
ia64: fix strict aliasing warnings with libm error
The current code declares double constants by using a char buffer and
then casting the pointer to a different type. This makes the aliasing
logic unhappy. Change it to use a union instead to avoid that.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-rw-r--r-- | ports/ChangeLog.ia64 | 24 | ||||
-rw-r--r-- | ports/sysdeps/ia64/fpu/libm_error.c | 115 |
2 files changed, 81 insertions, 58 deletions
diff --git a/ports/ChangeLog.ia64 b/ports/ChangeLog.ia64 index 82ae703..371be42 100644 --- a/ports/ChangeLog.ia64 +++ b/ports/ChangeLog.ia64 @@ -1,5 +1,29 @@ 2013-03-12 Mike Frysinger <vapier@gentoo.org> + * sysdeps/ia64/fpu/libm_error.c (STATIC): Delete redundant definition. + (_DECL_NUM, DECL_FLOAT, DECL_DOUBLE, DECL_LONG_DOUBLE): New defines. + (float_inf): Change definition to use DECL_FLOAT. + (float_huge, float_zero, float_neg_inf, float_neg_huge, + float_neg_zero): Likewise. + (double_inf): Change definition to use DECL_DOUBLE. + (double_huge, double_zero, double_neg_inf, double_neg_huge, + double_neg_zero): Likewise. + (long_double_inf): Change definition to use DECL_LONG_DOUBLE. + (long_double_huge, long_double_zero, long_double_neg_inf, + long_double_neg_huge, long_double_neg_zero): Likewise. + (RETVAL_HUGE_VALL): Change from casting a pointer to using the num + field of the union. + (RETVAL_NEG_HUGE_VALL, RETVAL_HUGEL, RETVAL_NEG_HUGEL, + RETVAL_HUGE_VALL, RETVAL_NEG_HUGE_VALL, RETVAL_HUGEL, + RETVAL_NEG_HUGEL, RETVAL_HUGE_VALD, RETVAL_NEG_HUGE_VALD, + RETVAL_HUGED, RETVAL_NEG_HUGED, RETVAL_HUGE_VALF, + RETVAL_NEG_HUGE_VALF, RETVAL_HUGEF, RETVAL_NEG_HUGEF, + ZEROL_VALUE, ZEROD_VALUE, ZEROF_VALUE, RETVAL_ZEROL, + RETVAL_ZEROD, RETVAL_ZEROF, RETVAL_NEG_ZEROL, RETVAL_NEG_ZEROD, + RETVAL_NEG_ZEROF): Likewise. + +2013-03-12 Mike Frysinger <vapier@gentoo.org> + * sysdeps/ia64/dl-fptr.h (ELF_PTR_TO_FDESC): New definition. * sysdeps/ia64/dl-machine.h (elf_machine_runtime_setup): Change struct fdesc * casts to use new ELF_PTR_TO_FDESC helper. diff --git a/ports/sysdeps/ia64/fpu/libm_error.c b/ports/sysdeps/ia64/fpu/libm_error.c index 8ef4bb5..a9307dd 100644 --- a/ports/sysdeps/ia64/fpu/libm_error.c +++ b/ports/sysdeps/ia64/fpu/libm_error.c @@ -162,80 +162,79 @@ struct exceptionl excl; # endif -#define STATIC static +#define _DECL_NUM(type, prefix, var, bytes...) \ + ALIGNIT static const union { \ + const char _bytes[sizeof (type)]; \ + const type num; \ + } prefix ## var = { \ + ._bytes = bytes, \ + } + +#define DECL_FLOAT(var, bytes...) \ + _DECL_NUM (float, float_, var, ##bytes) + +DECL_FLOAT(inf, {0x00,0x00,0x80,0x7F}); +DECL_FLOAT(huge, {0xFF,0xFF,0x7F,0x7F}); +DECL_FLOAT(zero, {0x00,0x00,0x00,0x00}); +DECL_FLOAT(neg_inf, {0x00,0x00,0x80,0xFF}); +DECL_FLOAT(neg_huge, {0xFF,0xFF,0x7F,0xFF}); +DECL_FLOAT(neg_zero, {0x00,0x00,0x00,0x80}); -ALIGNIT -STATIC const char float_inf[4] = {0x00,0x00,0x80,0x7F}; -ALIGNIT -STATIC const char float_huge[4] = {0xFF,0xFF,0x7F,0x7F}; -ALIGNIT -STATIC const char float_zero[4] = {0x00,0x00,0x00,0x00}; -ALIGNIT -STATIC const char float_neg_inf[4] = {0x00,0x00,0x80,0xFF}; -ALIGNIT -STATIC const char float_neg_huge[4] = {0xFF,0xFF,0x7F,0xFF}; -ALIGNIT -STATIC const char float_neg_zero[4] = {0x00,0x00,0x00,0x80}; -ALIGNIT -STATIC const char double_inf[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0x7F}; +#define DECL_DOUBLE(var, bytes...) \ + _DECL_NUM (double, double_, var, ##bytes) + +DECL_DOUBLE(inf, {0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0x7F}); #ifndef _LIBC -ALIGNIT -STATIC const char double_huge[8] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xEF,0x7F}; +DECL_DOUBLE(huge, {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xEF,0x7F}); #endif -ALIGNIT -STATIC const char double_zero[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; -ALIGNIT -STATIC const char double_neg_inf[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0xFF}; +DECL_DOUBLE(zero, {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}); +DECL_DOUBLE(neg_inf, {0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0xFF}); #ifndef _LIBC -ALIGNIT -STATIC const char double_neg_huge[8] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xEF,0xFF}; +DECL_DOUBLE(neg_huge, {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xEF,0xFF}); #endif -ALIGNIT -STATIC const char double_neg_zero[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80}; -ALIGNIT -STATIC const char long_double_inf[16] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xFF,0x7F,0x00,0x00,0x00,0x00,0x00,0x00}; -ALIGNIT +DECL_DOUBLE(neg_zero, {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80}); + +#define DECL_LONG_DOUBLE(var, bytes...) \ + _DECL_NUM (long double, long_double_, var, ##bytes) + +DECL_LONG_DOUBLE(inf, {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xFF,0x7F,0x00,0x00,0x00,0x00,0x00,0x00}); #ifndef _LIBC -STATIC const char long_double_huge[16] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0x7F,0x00,0x00,0x00,0x00,0x00,0x00}; +DECL_LONG_DOUBLE(huge, {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0x7F,0x00,0x00,0x00,0x00,0x00,0x00}); #endif -ALIGNIT -STATIC const char long_double_zero[16] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; -ALIGNIT -STATIC const char long_double_neg_inf[16] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00}; -ALIGNIT +DECL_LONG_DOUBLE(zero, {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}); +DECL_LONG_DOUBLE(neg_inf, {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00}); #ifndef _LIBC -STATIC const char long_double_neg_huge[16] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFF,0x00,0x00,0x00,0x00,0x00,0x00}; +DECL_LONG_DOUBLE(neg_huge, {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFF,0x00,0x00,0x00,0x00,0x00,0x00}); #endif -ALIGNIT -STATIC const char long_double_neg_zero[16] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00}; +DECL_LONG_DOUBLE(neg_zero, {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00}); -#define RETVAL_HUGE_VALL *(long double *)retval = *(long double *)long_double_inf -#define RETVAL_NEG_HUGE_VALL *(long double *)retval = *(long double *)long_double_neg_inf -#define RETVAL_HUGEL *(long double *)retval = (long double)*(float *)float_huge -#define RETVAL_NEG_HUGEL *(long double *)retval =(long double)*(float*)float_neg_huge +#define RETVAL_HUGE_VALL *(long double *)retval = long_double_inf.num +#define RETVAL_NEG_HUGE_VALL *(long double *)retval = long_double_neg_inf.num +#define RETVAL_HUGEL *(long double *)retval = (long double)float_huge.num +#define RETVAL_NEG_HUGEL *(long double *)retval = (long double)float_neg_huge.num -#define RETVAL_HUGE_VALD *(double *)retval = *(double *) double_inf -#define RETVAL_NEG_HUGE_VALD *(double *)retval = *(double *) double_neg_inf -#define RETVAL_HUGED *(double *)retval = (double) *(float *)float_huge -#define RETVAL_NEG_HUGED *(double *)retval = (double) *(float *) float_neg_huge +#define RETVAL_HUGE_VALD *(double *)retval = double_inf.num +#define RETVAL_NEG_HUGE_VALD *(double *)retval = double_neg_inf.num +#define RETVAL_HUGED *(double *)retval = (double)float_huge.num +#define RETVAL_NEG_HUGED *(double *)retval = (double)float_neg_huge.num -#define RETVAL_HUGE_VALF *(float *)retval = *(float *) float_inf -#define RETVAL_NEG_HUGE_VALF *(float *)retval = *(float *) float_neg_inf -#define RETVAL_HUGEF *(float *)retval = *(float *) float_huge -#define RETVAL_NEG_HUGEF *(float *)retval = *(float *) float_neg_huge +#define RETVAL_HUGE_VALF *(float *)retval = float_inf.num +#define RETVAL_NEG_HUGE_VALF *(float *)retval = float_neg_inf.num +#define RETVAL_HUGEF *(float *)retval = float_huge.num +#define RETVAL_NEG_HUGEF *(float *)retval = float_neg_huge.num -#define ZEROL_VALUE *(long double *)long_double_zero -#define ZEROD_VALUE *(double *)double_zero -#define ZEROF_VALUE *(float *)float_zero +#define ZEROL_VALUE long_double_zero.num +#define ZEROD_VALUE double_zero.num +#define ZEROF_VALUE float_zero.num -#define RETVAL_ZEROL *(long double *)retval = *(long double *)long_double_zero -#define RETVAL_ZEROD *(double *)retval = *(double *)double_zero -#define RETVAL_ZEROF *(float *)retval = *(float *)float_zero +#define RETVAL_ZEROL *(long double *)retval = long_double_zero.num +#define RETVAL_ZEROD *(double *)retval = double_zero.num +#define RETVAL_ZEROF *(float *)retval = float_zero.num -#define RETVAL_NEG_ZEROL *(long double *)retval = *(long double *)long_double_neg_zero -#define RETVAL_NEG_ZEROD *(double *)retval = *(double *)double_neg_zero -#define RETVAL_NEG_ZEROF *(float *)retval = *(float *)float_neg_zero +#define RETVAL_NEG_ZEROL *(long double *)retval = long_double_neg_zero.num +#define RETVAL_NEG_ZEROD *(double *)retval = double_neg_zero.num +#define RETVAL_NEG_ZEROF *(float *)retval = float_neg_zero.num #define RETVAL_ONEL *(long double *)retval = (long double) 1.0 #define RETVAL_ONED *(double *)retval = 1.0 |