[COMMITTED] Revert "x86_64: Add SSE sfp-exceptions"
Commit Message
The __sfp_handle_exceptions is not fully correct regarding raising
exceptions, since there is no direct way to raise only FP_EX_OVERFLOW
nor FP_EX_UNDERFLOW for SSE mode. Both libgcc and feraiseexcept rely
on x87 mode to accomplish it.
This reverts commit 460ee50de054396cc9791ff4cfdc2f5029fb923d.
Checked on x86_64.
---
sysdeps/x86/fpu/sfp-exceptions.c | 57 --------------------------------
sysdeps/x86_64/fpu/Makefile | 4 +--
2 files changed, 1 insertion(+), 60 deletions(-)
delete mode 100644 sysdeps/x86/fpu/sfp-exceptions.c
deleted file mode 100644
@@ -1,57 +0,0 @@
-/* x86_64 soft-fp exception handling for _Float128.
- Copyright (C) 2020 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <https://www.gnu.org/licenses/>. */
-
-#include <fenv.h>
-#include <float.h>
-#include <math-barriers.h>
-#include <soft-fp.h>
-
-void
-__sfp_handle_exceptions (int _fex)
-{
- if (_fex & FP_EX_INVALID)
- {
- float f = 0.0f;
- math_force_eval (f / f);
- }
- if (_fex & FP_EX_DENORM)
- {
- float f = FLT_MIN, g = 2.0f;
- math_force_eval (f / g);
- }
- if (_fex & FP_EX_DIVZERO)
- {
- float f = 1.0f, g = 0.0f;
- math_force_eval (f / g);
- }
- if (_fex & FP_EX_OVERFLOW)
- {
- float force_underflow = FLT_MAX * FLT_MAX;
- math_force_eval (force_underflow);
- }
- if (_fex & FP_EX_UNDERFLOW)
- {
- float force_overflow = FLT_MIN * FLT_MIN;
- math_force_eval (force_overflow);
- }
- if (_fex & FP_EX_INEXACT)
- {
- float f = 1.0f, g = 3.0f;
- math_force_eval (f / g);
- }
-}
@@ -23,10 +23,8 @@ libmvec-support += svml_d_cos2_core svml_d_cos4_core_avx \
svml_s_sincosf8_core svml_s_sincosf16_core
endif
-ifeq ($(subdir),math)
-libm-routines += sfp-exceptions
-
# Variables for libmvec tests.
+ifeq ($(subdir),math)
ifeq ($(build-mathvec),yes)
libmvec-tests += double-vlen2 double-vlen4 double-vlen4-avx2 \
float-vlen4 float-vlen8 float-vlen8-avx2