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Windows/x86: _BitScan*64 are only available on 64 bit archs.

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Reported by memcorrupt. #1109
This commit is contained in:
Mike Pall 2023-11-05 11:27:35 +01:00
parent e826d0c101
commit f2e955dae8
1 changed files with 7 additions and 4 deletions
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11
src/lj_def.h
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@ -259,12 +259,8 @@ static LJ_AINLINE uint32_t lj_fls(uint32_t x)
#else
unsigned char _BitScanForward(unsigned long *, unsigned long);
unsigned char _BitScanReverse(unsigned long *, unsigned long);
unsigned char _BitScanForward64(unsigned long *, uint64_t);
unsigned char _BitScanReverse64(unsigned long *, uint64_t);
#pragma intrinsic(_BitScanForward)
#pragma intrinsic(_BitScanReverse)
#pragma intrinsic(_BitScanForward64)
#pragma intrinsic(_BitScanReverse64)
static LJ_AINLINE uint32_t lj_ffs(uint32_t x)
{
@ -276,6 +272,12 @@ static LJ_AINLINE uint32_t lj_fls(uint32_t x)
unsigned long r; _BitScanReverse(&r, x); return (uint32_t)r;
}
#if defined(_M_X64) || defined(_M_ARM64)
unsigned char _BitScanForward64(unsigned long *, uint64_t);
unsigned char _BitScanReverse64(unsigned long *, uint64_t);
#pragma intrinsic(_BitScanForward64)
#pragma intrinsic(_BitScanReverse64)
static LJ_AINLINE uint32_t lj_ffs64(uint64_t x)
{
unsigned long r; _BitScanForward64(&r, x); return (uint32_t)r;
@ -286,6 +288,7 @@ static LJ_AINLINE uint32_t lj_fls64(uint64_t x)
unsigned long r; _BitScanReverse64(&r, x); return (uint32_t)r;
}
#endif
#endif
unsigned long _byteswap_ulong(unsigned long);
uint64_t _byteswap_uint64(uint64_t);