libretro/scummvm
1
0
Fork 0
mirror of https://github.com/libretro/scummvm.git synced 2025-01-27 05:32:45 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

COMMON: Remove the MIPS byteswap functions

Browse Source
This commit is contained in:
Cameron Cawley 2022-06-19 18:15:14 +01:00 committed by Eugene Sandulenko
parent 56986e337c
commit 34057b773e
1 changed files with 6 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

66
common/endian.h
View File

@ -92,23 +92,8 @@
* and vice versa.
*/
// compilerspecific variants come first, fallback last
// Test for GCC and if the target has the MIPS rel.2 instructions (we know the psp does)
#if defined(__GNUC__) && (defined(__psp__) || defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2))
FORCEINLINE uint16 SWAP_BYTES_16(const uint16 a) {
if (__builtin_constant_p(a)) {
return SWAP_CONSTANT_16(a);
} else {
uint16 result;
__asm__ ("wsbh %0,%1" : "=r" (result) : "r" (a));
return result;
}
}
// Test for GCC-compatible
#elif GCC_ATLEAST(4, 8) || defined(__clang__)
// compiler-specific variants come first, fallback last
#if GCC_ATLEAST(4, 8) || defined(__clang__)
FORCEINLINE uint16 SWAP_BYTES_16(uint16 a) {
return __builtin_bswap16(a);
@ -134,29 +119,8 @@
* and vice versa.
*/
// machine/compiler-specific variants come first, fallback last
// Test for GCC and if the target has the MIPS rel.2 instructions (we know the psp does)
#if defined(__GNUC__) && (defined(__psp__) || defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2))
FORCEINLINE uint32 SWAP_BYTES_32(const uint32 a) {
if (__builtin_constant_p(a)) {
return SWAP_CONSTANT_32(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;
}
}
// Test for GCC-compatible
#elif defined(__GNUC__)
// compiler-specific variants come first, fallback last
#if defined(__GNUC__)
FORCEINLINE uint32 SWAP_BYTES_32(uint32 a) {
return __builtin_bswap32(a);
@ -183,26 +147,8 @@
* and vice versa.
*/
// machine/compiler-specific variants come first, fallback last
// Test for GCC and if the target has the MIPS rel.2 instructions (we know the psp does)
//
#if defined(__GNUC__) && (defined(__psp__) || defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2))
FORCEINLINE uint64 SWAP_BYTES_64(const uint64 a) {
if (__builtin_constant_p(a)) {
return SWAP_CONSTANT_64(a);
} else {
uint32 low = (uint32)a, high = (uint32)(a >> 32);
low = SWAP_BYTES_32(low);
high = SWAP_BYTES_32(high);
return (((uint64)low) << 32) | high;
}
}
// Test for GCC-compatible
#elif defined(__GNUC__)
// compiler-specific variants come first, fallback last
#if defined(__GNUC__)
FORCEINLINE uint64 SWAP_BYTES_64(uint64 a) {
return __builtin_bswap64(a);