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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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24
cpu/cz80/cz80.h
View file

@ -21,36 +21,38 @@
extern "C" {
#endif
#include <pico/pico_port.h>
/******************************/
/* Compiler dependant defines */
/******************************/
#ifndef UINT8
#define UINT8 unsigned char
#define UINT8 u8
#endif
#ifndef INT8
#define INT8 signed char
#define INT8 s8
#endif
#ifndef UINT16
#define UINT16 unsigned short
#define UINT16 u16
#endif
#ifndef INT16
#define INT16 signed short
#define INT16 s16
#endif
#ifndef UINT32
#define UINT32 unsigned int
#define UINT32 u32
#endif
#ifndef INT32
#define INT32 signed int
#define INT32 s32
#endif
#ifndef FPTR
#define FPTR uintptr_t
#define FPTR uptr
#endif
/*************************************/
@ -62,16 +64,16 @@ extern "C" {
#define CZ80_FETCH_SFT (16 - CZ80_FETCH_BITS)
#define CZ80_FETCH_BANK (1 << CZ80_FETCH_BITS)
#define PICODRIVE_HACKS 1
#define CZ80_LITTLE_ENDIAN 1
#define PICODRIVE_HACKS 1
#define CZ80_LITTLE_ENDIAN CPU_IS_LE
#define CZ80_USE_JUMPTABLE 1
#define CZ80_BIG_FLAGS_ARRAY 1
#define CZ80_BIG_FLAGS_ARRAY 1
//#ifdef BUILD_CPS1PSP
//#define CZ80_ENCRYPTED_ROM 1
//#else
#define CZ80_ENCRYPTED_ROM 0
//#endif
#define CZ80_EMULATE_R_EXACTLY 1
#define CZ80_EMULATE_R_EXACTLY 1
#define zR8(A) (*CPU->pzR8[A])
#define zR16(A) (CPU->pzR16[A]->W)

12
cpu/cz80/cz80macro.h
View file

@ -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; }