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MSVC: Use intrinsics for rotating left/right

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Also use the proper define to check for MSVC compiler
This commit is contained in:
darkstar
2018-02-21 22:42:38 +01:00
parent 97d9521cec
commit 816da41836
1 changed files with 12 additions and 4 deletions
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16
src/random.c
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@@ -44,30 +44,38 @@
uint32_t preconst = 0x6ED9EBA1; uint32_t preconst = 0x6ED9EBA1;
static __inline__ uint32_t rotl32c (uint32_t x, uint32_t n) static __inline uint32_t rotl32c (uint32_t x, uint32_t n)
{ {
#if 0 #if 0
assert (n<32); assert (n<32);
#endif #endif
#ifdef _MSC_VER
return _rotl(x, n);
#else
return (x<<n) | (x>>(-n&31)); return (x<<n) | (x>>(-n&31));
#endif
} }
static __inline__ uint32_t rotr32c (uint32_t x, uint32_t n) static __inline uint32_t rotr32c (uint32_t x, uint32_t n)
{ {
#if 0 #if 0
assert (n<32); assert (n<32);
#endif #endif
#ifdef _MSC_VER
return _rotr(x, n);
#else
return (x>>n) | (x<<(-n&31)); return (x>>n) | (x<<(-n&31));
#endif
} }
#define ROTATE_LEFT rotl32c #define ROTATE_LEFT rotl32c
#define ROTATE_RIGHT rotr32c #define ROTATE_RIGHT rotr32c
static __inline__ unsigned long long rdtsc(void) static __inline unsigned long long rdtsc(void)
{ {
unsigned hi, lo; unsigned hi, lo;
#ifdef __MSC__ #ifdef _MSC_VER
__asm { __asm {
rdtsc rdtsc
mov hi, edx ; EDX:EAX is already standard return!! mov hi, edx ; EDX:EAX is already standard return!!