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Revert 1689ad27af "[builtins] Implement rounding mode support for i386/x86_64" 

It broke the build with MSVC:

fp_mode.c(20): error C2065: '__asm__': undeclared identifier

> Differential Revision: https://reviews.llvm.org/D69870
This commit is contained in:
Hans Wennborg 2019-11-19 09:37:31 +01:00
parent 8978c12b39
commit a19f0eec94
4 changed files with 2 additions and 44 deletions
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1
compiler-rt/lib/builtins/CMakeLists.txt
View File

@ -239,7 +239,6 @@ set(x86_ARCH_SOURCES
floatuntixf.c
mulxc3.c
powixf2.c
i386/fp_mode.c
)
if (NOT MSVC)

39
compiler-rt/lib/builtins/i386/fp_mode.c
View File

@ -1,39 +0,0 @@
//===----- lib/i386/fp_mode.c - Floaing-point mode utilities -----*- C -*-====//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "../fp_mode.h"
#define X87_TONEAREST 0x0000
#define X87_DOWNWARD 0x0400
#define X87_UPWARD 0x0800
#define X87_TOWARDZERO 0x0c00
#define X87_RMODE_MASK (X87_TONEAREST | X87_UPWARD | X87_DOWNWARD | X87_TOWARDZERO)
FE_ROUND_MODE __fe_getround() {
// Assume that the rounding mode state for the fpu agrees with the SSE unit.
unsigned short cw;
__asm__ __volatile__ ("fnstcw %0" : "=m" (cw));
switch (cw & X87_RMODE_MASK) {
case X87_TONEAREST:
return FE_TONEAREST;
case X87_DOWNWARD:
return FE_DOWNWARD;
case X87_UPWARD:
return FE_UPWARD;
case X87_TOWARDZERO:
return FE_TOWARDZERO;
}
return FE_TONEAREST;
}
int __fe_raise_inexact() {
float f = 1.0f, g = 3.0f;
__asm__ __volatile__ ("fdivs %1" : "+t" (f) : "m" (g));
return 0;
}

3
compiler-rt/test/builtins/Unit/addtf3_test.c
View File

@ -76,8 +76,7 @@ int main()
UINT64_C(0x61e58dd6c51eb77c)))
return 1;
#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP) || \
defined(i386) || defined(__x86_64__)
#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP)
// Rounding mode tests on supported architectures
const long double m = 1234.0L, n = 0.01L;

3
compiler-rt/test/builtins/Unit/subtf3_test.c
View File

@ -69,8 +69,7 @@ int main()
UINT64_C(0xa44a7bca780a166c)))
return 1;
#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP) || \
defined(i386) || defined(__x86_64__)
#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP)
// Rounding mode tests on supported architectures
const long double m = 1234.02L, n = 0.01L;