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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-03-26 11:00:56 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-04-17 11:42:29 -0300 |
| commit | 460ee50de054396cc9791ff4cfdc2f5029fb923d (patch) | |
| tree | 476f6485317bd2901682f920fa04e93541680e0f /sysdeps/x86_64 | |
| parent | c10dde0d2a6373f6e7688e93a5c9db58162ddb1f (diff) | |
| download | glibc-460ee50de054396cc9791ff4cfdc2f5029fb923d.tar.gz | |
x86_64: Add SSE sfp-exceptions
The exported x86_64 fenv.h functions operate on both i387 and SSE (since
they should work on both float, double, and long double) while the
internal libc_fe* set either SSE (float, double, and float128) or
i387 (long double).
The libgcc __sfp_handle_exceptions (used on float128 implementation),
however, will set either SEE or i387 exception depending of the
exception to raise. This broke the internal assumption of float128
where only SSE operations will be used.
This patch reimplements the libgcc __sfp_handle_exceptions to use only
SSE operations and sets libgcc to use it instead of its own
implementation.
And I think we should fix libgcc in a similar manner, since checking on
config/i386/64/sfp-machine.h it already only supports SSE rounding mode
and x86_64 ABI also expectes float128 to use SSE registers [1]
(although it is not clear on how future implementation might implement
it).
Checked on x86_64-linux-gnu.
[1] https://github.com/hjl-tools/x86-psABI/wiki/X86-psABI
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/fpu/Makefile | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sysdeps/x86_64/fpu/Makefile b/sysdeps/x86_64/fpu/Makefile index a4ff2723a8..a95e3f74f4 100644 --- a/sysdeps/x86_64/fpu/Makefile +++ b/sysdeps/x86_64/fpu/Makefile @@ -23,8 +23,10 @@ libmvec-support += svml_d_cos2_core svml_d_cos4_core_avx \ svml_s_sincosf8_core svml_s_sincosf16_core endif -# Variables for libmvec tests. ifeq ($(subdir),math) +libm-routines += sfp-exceptions + +# Variables for libmvec tests. ifeq ($(build-mathvec),yes) libmvec-tests += double-vlen2 double-vlen4 double-vlen4-avx2 \ float-vlen4 float-vlen8 float-vlen8-avx2 |