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Fix asm

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This commit is contained in:
Pavel Krajcevski 2012-08-28 19:41:36 -04:00
parent 87375f4c14
commit b9350e3876
1 changed files with 9 additions and 6 deletions
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15
BPTCEncoder/src/RGBAEndpoints.cpp
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@ -67,7 +67,7 @@ static const float kFloatConversion[256] = {
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
static inline uint32 CountBitsInMask(uint8 n) { static inline uint32 CountBitsInMask(uint8 n) {
#if defined(_WIN64) || defined(NO_INLINE_ASSEMBLY) #if defined(_WIN64) || defined(__x86_64__) || defined(NO_INLINE_ASSEMBLY)
if(!n) return 0; // no bits set if(!n) return 0; // no bits set
if(!(n & (n-1))) return 1; // power of two if(!(n & (n-1))) return 1; // power of two
@ -85,14 +85,17 @@ static inline uint32 CountBitsInMask(uint8 n) {
sub eax, ecx sub eax, ecx
} }
#else #else
__asm__("mov %%eax, 8;" uint32 ans;
"movzbl %0, %%ecx;" __asm__("movl $8, %%eax;"
"movzbl %b1, %%ecx;"
"bsf %%ecx, %%ecx;" "bsf %%ecx, %%ecx;"
"sub %%eax, %%ecx;" "subl %%ecx, %%eax;"
: // No output registers "movl %%eax, %0;"
: "=Q"(ans)
: "r"(n) : "r"(n)
: "%eax", "%ecx" : "%eax", "%ecx"
); );
return ans;
#endif #endif
#endif #endif
} }
@ -105,7 +108,7 @@ static inline void clamp(ty &x, const ty &min, const ty &max) {
// absolute distance. It turns out the compiler does a much // absolute distance. It turns out the compiler does a much
// better job of optimizing this than we can, since we can't // better job of optimizing this than we can, since we can't
// translate the values to/from registers // translate the values to/from registers
static uint8 sad(uint8 a, uint8 b) { static uint sad(uint8 a, uint8 b) {
#if 0 #if 0
__asm __asm
{ {