DrSocalkwe3n/luajit
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Add XBox 360 port.

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Thanks to Eddie Edwards.
This commit is contained in:
Mike Pall
2013-01-21 16:43:49 +01:00
parent 2c293a96de
commit 89e4650bae
9 changed files with 233 additions and 25 deletions
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32
src/lj_def.h
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@@ -242,12 +242,18 @@ static LJ_AINLINE uint32_t lj_getu32(const void *p)
#define LJ_FASTCALL __fastcall
#endif
#ifdef _M_PPC
#pragma intrinsic(_CountLeadingZeros)
unsigned int _CountLeadingZeros(long);
static LJ_AINLINE uint32_t lj_fls(uint32_t x)
{
return _CountLeadingZeros(x) ^ 31;
}
#else
#pragma intrinsic(_BitScanForward)
#pragma intrinsic(_BitScanReverse)
unsigned char _BitScanForward(uint32_t *, unsigned long);
unsigned char _BitScanReverse(uint32_t *, unsigned long);
unsigned long _byteswap_ulong(unsigned long);
uint64_t _byteswap_uint64(uint64_t);
static LJ_AINLINE uint32_t lj_ffs(uint32_t x)
{
@@ -258,13 +264,33 @@ static LJ_AINLINE uint32_t lj_fls(uint32_t x)
{
uint32_t r; _BitScanReverse(&r, x); return r;
}
#endif
unsigned long _byteswap_ulong(unsigned long);
uint64_t _byteswap_uint64(uint64_t);
#define lj_bswap(x) (_byteswap_ulong((x)))
#define lj_bswap64(x) (_byteswap_uint64((x)))
/* MSVC is only supported on x86/x64, where unaligned loads are always ok. */
#if defined(_M_PPC) && defined(LUAJIT_NO_UNALIGNED)
/*
** Replacement for unaligned loads on XBox 360. Disabled by default since it's
** usually more costly than the occasional stall when crossing a cache-line.
*/
static LJ_AINLINE uint16_t lj_getu16(const void *v)
{
const uint8_t *p = (const uint8_t *)v;
return (uint16_t)((p[0]<<8) | p[1]);
}
static LJ_AINLINE uint32_t lj_getu32(const void *v)
{
const uint8_t *p = (const uint8_t *)v;
return (uint32_t)((p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3]);
}
#else
/* Unaligned loads are generally ok on x86/x64. */
#define lj_getu16(p) (*(uint16_t *)(p))
#define lj_getu32(p) (*(uint32_t *)(p))
#endif
#else
#error "missing defines for your compiler"