Author: majnemer
Date: Fri Jan 1 00:50:08 2016
New Revision: 256686
URL: http://llvm.org/viewvc/llvm-project?rev=256686&view=rev
Log:
Reimplement __readeflags and __writeeflags on top of intrinsics
Lean on LLVM to provide this functionality now that it provides the
necessary intrinsics.
Modified:
cfe/trunk/include/clang/Basic/BuiltinsX86.def
cfe/trunk/lib/Headers/ia32intrin.h
Modified: cfe/trunk/include/clang/Basic/BuiltinsX86.def
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/BuiltinsX86.def?rev=256686&r1=256685&r2=256686&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/BuiltinsX86.def (original)
+++ cfe/trunk/include/clang/Basic/BuiltinsX86.def Fri Jan 1 00:50:08 2016
@@ -41,6 +41,13 @@ TARGET_BUILTIN(__builtin_ia32_undef128,
TARGET_BUILTIN(__builtin_ia32_undef256, "V4d", "nc", "")
TARGET_BUILTIN(__builtin_ia32_undef512, "V8d", "nc", "")
+// FLAGS
+//
+TARGET_BUILTIN(__builtin_ia32_readeflags_u32, "Ui", "n", "")
+TARGET_BUILTIN(__builtin_ia32_readeflags_u64, "ULLi", "n", "")
+TARGET_BUILTIN(__builtin_ia32_writeeflags_u32, "vUi", "n", "")
+TARGET_BUILTIN(__builtin_ia32_writeeflags_u64, "vULLi", "n", "")
+
// 3DNow!
//
TARGET_BUILTIN(__builtin_ia32_femms, "v", "", "3dnow")
Modified: cfe/trunk/lib/Headers/ia32intrin.h
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Headers/ia32intrin.h?rev=256686&r1=256685&r2=256686&view=diff
==============================================================================
--- cfe/trunk/lib/Headers/ia32intrin.h (original)
+++ cfe/trunk/lib/Headers/ia32intrin.h Fri Jan 1 00:50:08 2016
@@ -32,50 +32,26 @@
static __inline__ unsigned long long __attribute__((__always_inline__,
__nodebug__))
__readeflags(void)
{
- unsigned long long __res = 0;
- __asm__ __volatile__ ("pushf\n\t"
- "popq %0\n"
- :"=r"(__res)
- :
- :
- );
- return __res;
+ return __builtin_ia32_readeflags_u64();
}
static __inline__ void __attribute__((__always_inline__, __nodebug__))
__writeeflags(unsigned long long __f)
{
- __asm__ __volatile__ ("pushq %0\n\t"
- "popf\n"
- :
- :"r"(__f)
- :"flags"
- );
+ __builtin_ia32_writeeflags_u64(__f);
}
#else /* !__x86_64__ */
static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__))
__readeflags(void)
{
- unsigned int __res = 0;
- __asm__ __volatile__ ("pushf\n\t"
- "popl %0\n"
- :"=r"(__res)
- :
- :
- );
- return __res;
+ return __builtin_ia32_readeflags_u32();
}
static __inline__ void __attribute__((__always_inline__, __nodebug__))
__writeeflags(unsigned int __f)
{
- __asm__ __volatile__ ("pushl %0\n\t"
- "popf\n"
- :
- :"r"(__f)
- :"flags"
- );
+ __builtin_ia32_writeeflags_u32(__f);
}
#endif /* !__x86_64__ */
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