Implement __emul, __emulu, _mul128 and _umul128 MS intrinsics
Reviewers: rnk, thakis, majnemer, hans
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D25353
llvm-svn: 283785
diff --git a/clang/lib/Headers/intrin.h b/clang/lib/Headers/intrin.h
index 3a45ad9..100da0b 100644
--- a/clang/lib/Headers/intrin.h
+++ b/clang/lib/Headers/intrin.h
@@ -66,7 +66,9 @@
static __inline__
void __cpuidex(int[4], int, int);
void __debugbreak(void);
+static __inline__
__int64 __emul(int, int);
+static __inline__
unsigned __int64 __emulu(unsigned int, unsigned int);
void __cdecl __fastfail(unsigned int);
unsigned int __getcallerseflags(void);
@@ -313,8 +315,6 @@
static __inline__
void __movsq(unsigned long long *, unsigned long long const *, size_t);
static __inline__
-__int64 __mulh(__int64, __int64);
-static __inline__
unsigned __int64 __popcnt64(unsigned __int64);
static __inline__
unsigned char __readgsbyte(unsigned long);
@@ -405,9 +405,6 @@
__int64 _InterlockedXor64(__int64 volatile *_Value, __int64 _Mask);
__int64 _InterlockedXor64_np(__int64 volatile *_Value, __int64 _Mask);
char _InterlockedXor8_np(char volatile *_Value, char _Mask);
-static __inline__
-__int64 _mul128(__int64 _Multiplier, __int64 _Multiplicand,
- __int64 *_HighProduct);
unsigned __int64 _rorx_u64(unsigned __int64, const unsigned int);
__int64 _sarx_i64(__int64, unsigned int);
#if __STDC_HOSTED__
@@ -415,35 +412,20 @@
#endif
unsigned __int64 _shlx_u64(unsigned __int64, unsigned int);
unsigned __int64 _shrx_u64(unsigned __int64, unsigned int);
-/*
- * Multiply two 64-bit integers and obtain a 64-bit result.
- * The low-half is returned directly and the high half is in an out parameter.
- */
-static __inline__ unsigned __int64 __DEFAULT_FN_ATTRS
-_umul128(unsigned __int64 _Multiplier, unsigned __int64 _Multiplicand,
- unsigned __int64 *_HighProduct) {
- unsigned __int128 _FullProduct =
- (unsigned __int128)_Multiplier * (unsigned __int128)_Multiplicand;
- *_HighProduct = _FullProduct >> 64;
- return _FullProduct;
-}
+static __inline__
+__int64 __mulh(__int64, __int64);
static __inline__
unsigned __int64 __umulh(unsigned __int64, unsigned __int64);
+static __inline__
+__int64 _mul128(__int64, __int64, __int64*);
+static __inline__
+unsigned __int64 _umul128(unsigned __int64,
+ unsigned __int64,
+ unsigned __int64*);
#endif /* __x86_64__ */
/*----------------------------------------------------------------------------*\
-|* Multiplication
-\*----------------------------------------------------------------------------*/
-static __inline__ __int64 __DEFAULT_FN_ATTRS
-__emul(int __in1, int __in2) {
- return (__int64)__in1 * (__int64)__in2;
-}
-static __inline__ unsigned __int64 __DEFAULT_FN_ATTRS
-__emulu(unsigned int __in1, unsigned int __in2) {
- return (unsigned __int64)__in1 * (unsigned __int64)__in2;
-}
-/*----------------------------------------------------------------------------*\
|* Bit Counting and Testing
\*----------------------------------------------------------------------------*/
static __inline__ unsigned char __DEFAULT_FN_ATTRS