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core, libretro fixes for chd support

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This commit is contained in:
kub 2021-03-10 23:07:25 +01:00
parent 3d1e252313
commit 886ce067c3
6 changed files with 13 additions and 7 deletions
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9
pico/pico_port.h
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@ -34,8 +34,8 @@
#endif
// There's no standard way to determine endianess at compile time.
// Do not bother with mixed endian platforms, no one will ever compile on that.
// There's no standard way to determine endianess at compile time. Try using
// some well known non-standard macros for detection.
#if defined __BYTE_ORDER__
#define CPU_IS_LE __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#elif defined _BYTE_ORDER
@ -48,6 +48,7 @@
#warning "can't detect byte order, assume little endian"
#define CPU_IS_LE 1
#endif
// NB mixed endian integer platforms are not supported.
#if CPU_IS_LE
// address/offset operations
@ -56,7 +57,7 @@
#define MEM_LE2(a) (a)
#define MEM_LE4(a) (a)
// swapping
#define CPU_BE2(v) (((v)<<16)|((v)>>16))
#define CPU_BE2(v) ((u32)((u64)(v)<<16)|((v)>>16))
#define CPU_BE4(v) (((u32)(v)>>24)|(((v)>>8)&0x00ff00)| \
(((v)<<8)&0xff0000)|(u32)((v)<<24))
#define CPU_LE2(v) (v) // swap of 2*u16 in u32
@ -70,7 +71,7 @@
// swapping
#define CPU_BE2(v) (v)
#define CPU_BE4(v) (v)
#define CPU_LE2(v) (((v)<<16)|((v)>>16))
#define CPU_LE2(v) ((u32)((u64)(v)<<16)|((v)>>16))
#define CPU_LE4(v) (((u32)(v)>>24)|(((v)>>8)&0x00ff00)| \
(((v)<<8)&0xff0000)|(u32)((v)<<24))
#endif