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add big endian platform support

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This commit is contained in:
kub 2021-02-22 22:25:03 +01:00
parent b053cb2044
commit 57c5a5e505
21 changed files with 224 additions and 178 deletions
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12
cpu/cz80/cz80macro.h
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@ -48,11 +48,7 @@
#define READ_OP() GET_OP(); PC++
#define READ_ARG() (*(UINT8 *)PC++)
#if CZ80_LITTLE_ENDIAN
#define READ_ARG16() (*(UINT8 *)PC | (*(UINT8 *)(PC + 1) << 8)); PC += 2
#else
#define READ_ARG16() (*(UINT8 *)(PC + 1) | (*(UINT8 *)PC << 8)); PC += 2
#endif
//#ifndef BUILD_CPS1PSP
//#define READ_MEM8(A) memory_region_cpu2[(A)]
@ -63,11 +59,7 @@
#define READ_MEM8(A) CPU->Read_Byte(A)
#endif
//#endif
#if CZ80_LITTLE_ENDIAN
#define READ_MEM16(A) (READ_MEM8(A) | (READ_MEM8((A) + 1) << 8))
#else
#define READ_MEM16(A) ((READ_MEM8(A) << 8) | READ_MEM8((A) + 1))
#endif
#if PICODRIVE_HACKS
#define WRITE_MEM8(A, D) { \
@ -82,11 +74,7 @@
#else
#define WRITE_MEM8(A, D) CPU->Write_Byte(A, D);
#endif
#if CZ80_LITTLE_ENDIAN
#define WRITE_MEM16(A, D) { WRITE_MEM8(A, D); WRITE_MEM8((A) + 1, (D) >> 8); }
#else
#define WRITE_MEM16(A, D) { WRITE_MEM8((A) + 1, D); WRITE_MEM8(A, (D) >> 8); }
#endif
#define PUSH_16(A) { UINT32 sp; zSP -= 2; sp = zSP; WRITE_MEM16(sp, A); }
#define POP_16(A) { UINT32 sp; sp = zSP; A = READ_MEM16(sp); zSP = sp + 2; }