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| author | Stefan Liebler <stli@de.ibm.com> | 2016-01-18 12:48:06 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@de.ibm.com> | 2016-01-18 12:48:06 +0100 |
| commit | c4d17461e062e730fca4076dd47a2733b3914c51 (patch) | |
| tree | 89346046c4bad9bad11d8e8cbbc17c89856c5b2c /sysdeps/generic | |
| parent | 4e58b6485989a9462e88d5f683e2100902afd574 (diff) | |
| download | glibc-c4d17461e062e730fca4076dd47a2733b3914c51.tar.gz glibc-c4d17461e062e730fca4076dd47a2733b3914c51.tar.xz glibc-c4d17461e062e730fca4076dd47a2733b3914c51.zip | |
S/390: Do not raise inexact exception in lrint/lround. [BZ #19486]
I get some math test-failures on s390 for float/double/ldouble for various lrint/lround functions like: lrint (0x1p64): Exception "Inexact" set lrint (-0x1p64): Exception "Inexact" set lround (0x1p64): Exception "Inexact" set lround (-0x1p64): Exception "Inexact" set ... GCC emits "convert to fixed" instructions for casting floating point values to integer values. These instructions raise invalid and inexact exceptions if the floating point value exceeds the integer type ranges. This patch enables the various FIX_DBL_LONG_CONVERT_OVERFLOW macros in order to avoid a cast from floating point to integer type and raise the invalid exception with feraiseexcept. The ldbl-128 rint/round functions are now using the same logic. ChangeLog: [BZ #19486] * sysdeps/s390/fix-fp-int-convert-overflow.h: New File. * sysdeps/generic/fix-fp-int-convert-overflow.h (FIX_LDBL_LONG_CONVERT_OVERFLOW, FIX_LDBL_LLONG_CONVERT_OVERFLOW): New define. * sysdeps/arm/fix-fp-int-convert-overflow.h: Likewise. * sysdeps/mips/mips32/fpu/fix-fp-int-convert-overflow.h: Likewise. * sysdeps/ieee754/ldbl-128/s_lrintl.c (__lrintl): Avoid conversions to long int where inexact exceptions could be raised. * sysdeps/ieee754/ldbl-128/s_lroundl.c (__lroundl): Likewise. * sysdeps/ieee754/ldbl-128/s_llrintl.c (__llrintl): Avoid conversions to long long int where inexact exceptions could be raised. * sysdeps/ieee754/ldbl-128/s_llroundl.c (__llroundl): Likewise.
Diffstat (limited to 'sysdeps/generic')
| -rw-r--r-- | sysdeps/generic/fix-fp-int-convert-overflow.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/generic/fix-fp-int-convert-overflow.h b/sysdeps/generic/fix-fp-int-convert-overflow.h index 73884a61b3..fb681147c0 100644 --- a/sysdeps/generic/fix-fp-int-convert-overflow.h +++ b/sysdeps/generic/fix-fp-int-convert-overflow.h @@ -27,5 +27,7 @@ #define FIX_FLT_LLONG_CONVERT_OVERFLOW 0 #define FIX_DBL_LONG_CONVERT_OVERFLOW 0 #define FIX_DBL_LLONG_CONVERT_OVERFLOW 0 +#define FIX_LDBL_LONG_CONVERT_OVERFLOW 0 +#define FIX_LDBL_LLONG_CONVERT_OVERFLOW 0 #endif /* fix-fp-int-convert-overflow.h */ |