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COMMON: Implement MIPS SWAP_BYTES_64 in terms of SWAP_BYTES_32

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This commit is contained in:
Willem Jan Palenstijn 2015-01-04 21:54:11 +01:00
parent 7c7bdf3543
commit 1084f2eea6
1 changed files with 7 additions and 12 deletions
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19
common/endian.h
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@ -160,22 +160,17 @@
// Test for GCC and if the target has the MIPS rel.2 instructions (we know the psp does)
//
// TODO: Fix this #if statement. It isn't changed from 32 bit. Is there a 64 bit swap instruction?
#if defined(__GNUC__) && (defined(__psp__) || defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2))
FORCEINLINE uint32 SWAP_BYTES_32(const uint32 a) {
FORCEINLINE uint64 SWAP_BYTES_64(const uint64 a) {
if (__builtin_constant_p(a)) {
return SWAP_CONSTANT_32(a);
return SWAP_CONSTANT_64(a);
} else {
uint32 result;
# if defined(__psp__)
// use special allegrex instruction
__asm__ ("wsbw %0,%1" : "=r" (result) : "r" (a));
# else
__asm__ ("wsbh %0,%1\n"
"rotr %0,%0,16" : "=r" (result) : "r" (a));
# endif
return result;
uint32 low = (uint32)a, high = (uint32)(a >> 32);
low = SWAP_BYTES_32(low);
high = SWAP_BYTES_32(high);
return (((uint64)low) << 32) | high;
}
}