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i286xea.mcr
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#define GET_PREFIX_DS \
__asm { mov edi, DS_FIX }
#define GET_PREFIX_SS \
__asm { mov edi, SS_FIX }
// --- ea, reg8
// dest: I286_REG[eax] src: dl
#define PREPART_EA_REG8(regclk) \
__asm { movzx eax, bh } \
__asm { mov ebp, eax } \
__asm { shr ebp, 3 } \
__asm { bt ebp, 2 } \
__asm { adc ebp, ebp } \
__asm { and ebp, 7 } \
__asm { cmp al, 0c0h } \
__asm { jc memory_eareg8 } \
__asm { bt eax, 2 } \
__asm { adc eax, eax } \
__asm { and eax, 7 } \
__asm { mov dl, I286_REG[ebp] } \
I286CLOCK(regclk) \
// dest: MAIN_MEM[ecx] src: dl
#define MEMORY_EA_REG8(memclk) \
__asm { align 16 } \
memory_eareg8: \
I286CLOCK(memclk) \
__asm { call p_ea_dst[eax*4] } \
__asm { cmp ecx, I286_MEMWRITEMAX } \
__asm { jae extmem_eareg8 } \
__asm { mov dl, I286_REG[ebp] }
// dest: al,ecx src: I286_REG[ebx]
#define EXTMEM_EA_REG8 \
__asm { align 16 } \
extmem_eareg8: \
__asm { call i286_memoryread }
// --- ea, reg16
// dest: I286_REG[eax*2] src: dx
#define PREPART_EA_REG16(regclk) \
__asm { movzx eax, bh } \
__asm { mov ebp, eax } \
__asm { shr ebp, 3-1 } \
__asm { and ebp, 7*2 } \
__asm { cmp al, 0c0h } \
__asm { jc memory_eareg16 } \
__asm { and eax, 7 } \
__asm { mov dx, I286_REG[ebp] } \
I286CLOCK(regclk)
// dest: MAIN_MEM[ecx] src: dx
#define MEMORY_EA_REG16(memclk) \
__asm { align 16 } \
memory_eareg16: \
I286CLOCK(memclk) \
__asm { call p_ea_dst[eax*4] } \
__asm { cmp ecx, (I286_MEMWRITEMAX-1) } \
__asm { jae extmem_eareg16 } \
__asm { mov dx, I286_REG[ebp] }
// dest: ax,ecx src: I286_REG[ebp]
#define EXTMEM_EA_REG16 \
__asm { align 16 } \
extmem_eareg16: \
__asm { call i286_memoryread_w }
// --- reg8, ea
// dest: I286_REG[ebp] src: al
#define PREPART_REG8_EA(regclk, memclk) \
__asm { movzx eax, bh } \
__asm { mov ebp, eax } \
__asm { shr ebp, 3 } \
__asm { bt ebp, 2 } \
__asm { adc ebp, ebp } \
__asm { and ebp, 7 } \
__asm { cmp al, 0c0h } \
__asm { jnc src_register } \
I286CLOCK(memclk) \
__asm { call p_ea_dst[eax*4] } \
__asm { call i286_memoryread } \
__asm { jmp short reg8_ea_ready } \
__asm { align 16 } \
src_register: \
__asm { bt eax, 2 } \
__asm { adc eax, eax } \
__asm { and eax, 7 } \
__asm { mov edi, eax } \
GET_NEXTPRE2 \
__asm { mov al, I286_REG[edi] } \
I286CLOCK(regclk) \
reg8_ea_ready:
// --- reg16, ea
// dest: I286_REG[ebp] src: ax
#define PREPART_REG16_EA(regclk, memclk) \
__asm { movzx eax, bh } \
__asm { mov ebp, eax } \
__asm { shr ebp, 3-1 } \
__asm { and ebp, 7*2 } \
__asm { cmp al, 0c0h } \
__asm { jnc src_register } \
I286CLOCK(memclk) \
__asm { call p_ea_dst[eax*4] } \
__asm { call i286_memoryread_w } \
__asm { jmp reg16_ea_ready } \
__asm { align 16 } \
src_register: \
__asm { and eax, 7 } \
__asm { mov edi, eax } \
GET_NEXTPRE2 \
__asm { mov ax, I286_REG[edi*2] } \
I286CLOCK(regclk) \
reg16_ea_ready:
// f6,f7,fe,ff
// dest: I286_REG[eax]
#define PREPART_EA8(regclk) \
__asm { cmp al, 0c0h } \
__asm { jc memory_eareg8 } \
I286CLOCK(regclk) \
__asm { bt eax, 2 } \
__asm { adc eax, eax } \
__asm { and eax, 7 }
// dest: MAIN_MEM[ecx]
#define MEMORY_EA8(memclk) \
__asm { align 16 } \
memory_eareg8: \
I286CLOCK(memclk) \
__asm { call p_ea_dst[eax*4] } \
__asm { cmp ecx, I286_MEMWRITEMAX } \
__asm { jae extmem_eareg8 }
// dest: ecx
#define EXTMEM_EA8 \
__asm { align 16 } \
extmem_eareg8: \
__asm { call i286_memoryread }
// dest: I286_REG[eax*2]
#define PREPART_EA16(regclk) \
__asm { cmp al, 0c0h } \
__asm { jc memory_eareg16 } \
I286CLOCK(regclk) \
__asm { and eax, 7 }
// dest: MAIN_MEM[ecx]
#define MEMORY_EA16(memclk) \
__asm { align 16 } \
memory_eareg16: \
I286CLOCK(memclk) \
__asm { call p_ea_dst[eax*4] } \
__asm { cmp ecx, (I286_MEMWRITEMAX-1) } \
__asm { jae extmem_eareg16 }
// dest: ecx
#define EXTMEM_EA16 \
__asm { align 16 } \
extmem_eareg16: \
__asm { call i286_memoryread_w }