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further optimize mi_bchunk_try_find_and_clearNX

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daanx 2025-02-06 22:59:14 -08:00
parent 64aaf9d88f
commit 7931678899
4 changed files with 17 additions and 11 deletions
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8
include/mimalloc/bits.h
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@ -199,6 +199,8 @@ static inline size_t mi_ctz(size_t x) {
size_t r;
__asm ("tzcnt\t%1, %0" : "=r"(r) : "r"(x) : "cc");
return r;
#elif defined(_MSC_VER) && MI_ARCH_X64 && defined(__BMI1__)
return _tzcnt_u64(x);
#elif defined(_MSC_VER) && (MI_ARCH_X64 || MI_ARCH_X86 || MI_ARCH_ARM64 || MI_ARCH_ARM32)
unsigned long idx;
return (mi_msc_builtinz(_BitScanForward)(&idx, x) ? (size_t)idx : MI_SIZE_BITS);
@ -221,6 +223,8 @@ static inline size_t mi_clz(size_t x) {
size_t r;
__asm ("lzcnt\t%1, %0" : "=r"(r) : "r"(x) : "cc");
return r;
#elif defined(_MSC_VER) && MI_ARCH_X64 && defined(__BMI1__)
return _lzcnt_u64(x);
#elif defined(_MSC_VER) && (MI_ARCH_X64 || MI_ARCH_X86 || MI_ARCH_ARM64 || MI_ARCH_ARM32)
unsigned long idx;
return (mi_msc_builtinz(_BitScanReverse)(&idx, x) ? MI_SIZE_BITS - 1 - (size_t)idx : MI_SIZE_BITS);
@ -254,7 +258,7 @@ static inline bool mi_bsf(size_t x, size_t* idx) {
bool is_zero;
__asm ( "tzcnt\t%2, %1" : "=@ccc"(is_zero), "=r"(*idx) : "r"(x) : "cc" );
return !is_zero;
#elif defined(_MSC_VER) && (MI_ARCH_X64 || MI_ARCH_X86 || MI_ARCH_ARM64 || MI_ARCH_ARM32)
#elif 0 && defined(_MSC_VER) && (MI_ARCH_X64 || MI_ARCH_X86 || MI_ARCH_ARM64 || MI_ARCH_ARM32)
unsigned long i;
return (mi_msc_builtinz(_BitScanForward)(&i, x) ? (*idx = (size_t)i, true) : false);
#else
@ -271,7 +275,7 @@ static inline bool mi_bsr(size_t x, size_t* idx) {
bool is_zero;
__asm ("lzcnt\t%2, %1" : "=@ccc"(is_zero), "=r"(*idx) : "r"(x) : "cc");
return !is_zero;
#elif defined(_MSC_VER) && (MI_ARCH_X64 || MI_ARCH_X86 || MI_ARCH_ARM64 || MI_ARCH_ARM32)
#elif 0 && defined(_MSC_VER) && (MI_ARCH_X64 || MI_ARCH_X86 || MI_ARCH_ARM64 || MI_ARCH_ARM32)
unsigned long i;
return (mi_msc_builtinz(_BitScanReverse)(&i, x) ? (*idx = (size_t)i, true) : false);
#else