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Avoid c99 features

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This commit is contained in:
pancake 2014-03-07 03:47:58 +01:00
parent c76d8d03ba
commit 8ef059f370
1 changed files with 5 additions and 5 deletions
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10
MathExtras.h
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@ -87,7 +87,7 @@ static inline bool isPowerOf2_32(uint32_t Value) {
/// bit. Ex. CountLeadingZeros_32(0x00F000FF) == 8.
/// Returns 32 if the word is zero.
static inline unsigned CountLeadingZeros_32(uint32_t Value) {
unsigned Count; // result
unsigned Shift, Count; // result
#if __GNUC__ >= 4
// PowerPC is defined for __builtin_clz(0)
#if !defined(__ppc__) && !defined(__ppc64__)
@ -98,7 +98,7 @@ static inline unsigned CountLeadingZeros_32(uint32_t Value) {
if (!Value) return 32;
Count = 0;
// bisection method for count leading zeros
for (unsigned Shift = 32 >> 1; Shift; Shift >>= 1) {
for (Shift = 32 >> 1; Shift; Shift >>= 1) {
uint32_t Tmp = Value >> Shift;
if (Tmp) {
Value = Tmp;
@ -123,7 +123,7 @@ static inline unsigned CountLeadingOnes_32(uint32_t Value) {
/// one bit (64 bit edition.)
/// Returns 64 if the word is zero.
static inline unsigned CountLeadingZeros_64(uint64_t Value) {
unsigned Count; // result
unsigned Shift, Count; // result
#if __GNUC__ >= 4
// PowerPC is defined for __builtin_clzll(0)
#if !defined(__ppc__) && !defined(__ppc64__)
@ -137,7 +137,7 @@ static inline unsigned CountLeadingZeros_64(uint64_t Value) {
if (!Value) return 64;
Count = 0;
// bisection method for count leading zeros
for (unsigned Shift = 64 >> 1; Shift; Shift >>= 1) {
for (Shift = 64 >> 1; Shift; Shift >>= 1) {
uint64_t Tmp = Value >> Shift;
if (Tmp) {
Value = Tmp;
@ -242,7 +242,7 @@ static inline unsigned CountPopulation_32(uint32_t Value) {
#else
uint32_t v = Value - ((Value >> 1) & 0x55555555);
v = (v & 0x33333333) + ((v >> 2) & 0x33333333);
return ((v + (v >> 4) & 0xF0F0F0F) * 0x1010101) >> 24;
return (((v + (v >> 4)) & 0xF0F0F0F) * 0x1010101) >> 24;
#endif
}