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perfaware/part1: Support listing 0046

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This commit is contained in:
doyle 2023-04-16 12:18:39 +10:00
parent 67307e81b8
commit 5ae2cc3a56
6 changed files with 394 additions and 78 deletions
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8
part1/build.bat
View File

@ -77,3 +77,11 @@ copy /Y %script_dir%\%listing_0045%.txt %build_dir% 1>NUL
set build_dir_listing_0045=%build_dir%\%listing_0045% set build_dir_listing_0045=%build_dir%\%listing_0045%
%build_dir%\sim8086.exe --exec %build_dir_listing_0045% > %build_dir_listing_0045%_disassembled.txt %build_dir%\sim8086.exe --exec %build_dir_listing_0045% > %build_dir_listing_0045%_disassembled.txt
fc /N %build_dir_listing_0045%.txt %build_dir_listing_0045%_disassembled.txt || exit /b 1 fc /N %build_dir_listing_0045%.txt %build_dir_listing_0045%_disassembled.txt || exit /b 1
set listing_0045=listing_0045_challenge_register_movs
set listing_0046=listing_0046_add_sub_cmp
copy /Y %script_dir%\%listing_0046% %build_dir% 1>NUL
copy /Y %script_dir%\%listing_0046%.txt %build_dir% 1>NUL
set build_dir_listing_0046=%build_dir%\%listing_0046%
%build_dir%\sim8086.exe --exec %build_dir_listing_0046% > %build_dir_listing_0046%_disassembled.txt
fc /N %build_dir_listing_0046%.txt %build_dir_listing_0046%_disassembled.txt || exit /b 1

1
part1/listing_0046_add_sub_cmp Normal file
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@ -0,0 +1 @@
»ð¹)˼æ½ç9å<39>Å<04>íê

29
part1/listing_0046_add_sub_cmp.asm Normal file
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@ -0,0 +1,29 @@
; ========================================================================
;
; (C) Copyright 2023 by Molly Rocket, Inc., All Rights Reserved.
;
; This software is provided 'as-is', without any express or implied
; warranty. In no event will the authors be held liable for any damages
; arising from the use of this software.
;
; Please see https://computerenhance.com for further information
;
; ========================================================================
; ========================================================================
; LISTING 46
; ========================================================================
bits 16
mov bx, -4093
mov cx, 3841
sub bx, cx
mov sp, 998
mov bp, 999
cmp bp, sp
add bp, 1027
sub bp, 2026

16
part1/listing_0046_add_sub_cmp.txt Normal file
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@ -0,0 +1,16 @@
--- test\listing_0046_add_sub_cmp execution ---
mov bx, 61443 ; bx:0x0->0xf003
mov cx, 3841 ; cx:0x0->0xf01
sub bx, cx ; bx:0xf003->0xe102 flags:->S
mov sp, 998 ; sp:0x0->0x3e6
mov bp, 999 ; bp:0x0->0x3e7
cmp bp, sp ; flags:S->
add bp, 1027 ; bp:0x3e7->0x7ea
sub bp, 2026 ; bp:0x7ea->0x0 flags:->PZ
Final registers:
bx: 0xe102 (57602)
cx: 0x0f01 (3841)
sp: 0x03e6 (998)
flags: PZ

386
part1/sim8086.c
View File

@ -3,22 +3,40 @@
#include "sim8086_stdlib.c" #include "sim8086_stdlib.c"
typedef struct RegisterFile { typedef enum S86_RegisterByte {
uint16_t ax; S86_RegisterByte_Lo,
uint16_t cx; S86_RegisterByte_Hi,
uint16_t dx; S86_RegisterByte_Count,
uint16_t bx; S86_RegisterByte_Nil,
} S86_RegisterByte;
uint16_t sp; typedef union S86_Register16 {
uint16_t bp; uint16_t word;
uint16_t si; struct { uint8_t lo; uint8_t hi; } byte;
uint16_t di; uint8_t bytes[S86_RegisterByte_Count];
} S86_Register16;
uint16_t es; typedef struct S86_RegisterFile {
uint16_t cs; bool zero_flag;
uint16_t ss; bool sign_flag;
uint16_t ds; bool parity_flag;
} RegisterFile; bool overflow_flag;
S86_Register16 ax;
S86_Register16 bx;
S86_Register16 cx;
S86_Register16 dx;
S86_Register16 sp;
S86_Register16 bp;
S86_Register16 si;
S86_Register16 di;
S86_Register16 es;
S86_Register16 cs;
S86_Register16 ss;
S86_Register16 ds;
} S86_RegisterFile;
S86_Str8 S86_MnemonicStr8(S86_Mnemonic type) S86_Str8 S86_MnemonicStr8(S86_Mnemonic type)
{ {
@ -298,7 +316,7 @@ void S86_DecodeEffectiveAddr(S86_Opcode *opcode, S86_BufferIterator *buffer_it,
opcode->dest = S86_MnemonicOpFromWReg(w, rm); opcode->dest = S86_MnemonicOpFromWReg(w, rm);
} else { } else {
// NOTE: Effective address calculation w/ displacement // NOTE: Effective address calculation w/ displacement
// ========================================================================= // =====================================================================
opcode->effective_addr_loads_mem = true; opcode->effective_addr_loads_mem = true;
if (direct_address) { if (direct_address) {
opcode->dest = S86_MnemonicOp_DirectAddress; opcode->dest = S86_MnemonicOp_DirectAddress;
@ -799,12 +817,10 @@ S86_Opcode S86_DecodeOpcode(S86_BufferIterator *buffer_it,
typedef struct S86_MnemonicOpToRegisterFileMap { typedef struct S86_MnemonicOpToRegisterFileMap {
S86_MnemonicOp mnemonic_op; ///< Register/op that the mnemonic is using S86_MnemonicOp mnemonic_op; ///< Register/op that the mnemonic is using
S86_MnemonicOp mnemonic_op_reg16; ///< 16 bit register for the mnemonic op S86_MnemonicOp mnemonic_op_reg16; ///< 16 bit register for the mnemonic op
uint16_t mask; ///< Mask for the bits that the mnemonic op is using (hi/lo/full bit coverage) S86_Register16 *reg; ///< Pointer to the register memory this mnemonic op is using
uint16_t r_shift; ///< Shift amount for isolating the masked value S86_RegisterByte byte; ///< The 'byte' that the mnemonic operates on (hi, lo or nil e.g. word)
uint16_t *reg; ///< Pointer to the register memory this mnemonic op is using
} S86_MnemonicOpToRegisterFileMap; } S86_MnemonicOpToRegisterFileMap;
#define PRINT_USAGE S86_PrintLn(S86_STR8("usage: sim8086.exe [--exec] <binary asm file>")) #define PRINT_USAGE S86_PrintLn(S86_STR8("usage: sim8086.exe [--exec] <binary asm file>"))
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
@ -1143,37 +1159,37 @@ int main(int argc, char **argv)
else else
S86_PrintLn(S86_STR8("bits 16")); S86_PrintLn(S86_STR8("bits 16"));
RegisterFile register_file = {0}; S86_RegisterFile register_file = {0};
S86_BufferIterator buffer_it = S86_BufferIteratorInit(buffer); S86_BufferIterator buffer_it = S86_BufferIteratorInit(buffer);
S86_MnemonicOp seg_reg = {0}; S86_MnemonicOp seg_reg = {0};
bool lock_prefix = false; bool lock_prefix = false;
S86_MnemonicOpToRegisterFileMap mnemonic_op_to_register_file_map[] = { S86_MnemonicOpToRegisterFileMap mnemonic_op_to_register_file_map[] = {
{.mnemonic_op = S86_MnemonicOp_AX, .mnemonic_op_reg16 = S86_MnemonicOp_AX, .reg = &register_file.ax, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_AX, .mnemonic_op_reg16 = S86_MnemonicOp_AX, .reg = &register_file.ax, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_AL, .mnemonic_op_reg16 = S86_MnemonicOp_AX, .reg = &register_file.ax, .mask = 0x00FF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_AL, .mnemonic_op_reg16 = S86_MnemonicOp_AX, .reg = &register_file.ax, .byte = S86_RegisterByte_Lo},
{.mnemonic_op = S86_MnemonicOp_AH, .mnemonic_op_reg16 = S86_MnemonicOp_AX, .reg = &register_file.ax, .mask = 0xFF00, .r_shift = 8}, {.mnemonic_op = S86_MnemonicOp_AH, .mnemonic_op_reg16 = S86_MnemonicOp_AX, .reg = &register_file.ax, .byte = S86_RegisterByte_Hi},
{.mnemonic_op = S86_MnemonicOp_CX, .mnemonic_op_reg16 = S86_MnemonicOp_CX, .reg = &register_file.cx, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_CX, .mnemonic_op_reg16 = S86_MnemonicOp_CX, .reg = &register_file.cx, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_CL, .mnemonic_op_reg16 = S86_MnemonicOp_CX, .reg = &register_file.cx, .mask = 0x00FF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_CL, .mnemonic_op_reg16 = S86_MnemonicOp_CX, .reg = &register_file.cx, .byte = S86_RegisterByte_Lo},
{.mnemonic_op = S86_MnemonicOp_CH, .mnemonic_op_reg16 = S86_MnemonicOp_CX, .reg = &register_file.cx, .mask = 0xFF00, .r_shift = 8}, {.mnemonic_op = S86_MnemonicOp_CH, .mnemonic_op_reg16 = S86_MnemonicOp_CX, .reg = &register_file.cx, .byte = S86_RegisterByte_Lo},
{.mnemonic_op = S86_MnemonicOp_DX, .mnemonic_op_reg16 = S86_MnemonicOp_DX, .reg = &register_file.dx, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_DX, .mnemonic_op_reg16 = S86_MnemonicOp_DX, .reg = &register_file.dx, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_DL, .mnemonic_op_reg16 = S86_MnemonicOp_DX, .reg = &register_file.dx, .mask = 0x00FF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_DL, .mnemonic_op_reg16 = S86_MnemonicOp_DX, .reg = &register_file.dx, .byte = S86_RegisterByte_Lo},
{.mnemonic_op = S86_MnemonicOp_DH, .mnemonic_op_reg16 = S86_MnemonicOp_DX, .reg = &register_file.dx, .mask = 0xFF00, .r_shift = 8}, {.mnemonic_op = S86_MnemonicOp_DH, .mnemonic_op_reg16 = S86_MnemonicOp_DX, .reg = &register_file.dx, .byte = S86_RegisterByte_Hi},
{.mnemonic_op = S86_MnemonicOp_BX, .mnemonic_op_reg16 = S86_MnemonicOp_BX, .reg = &register_file.bx, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_BX, .mnemonic_op_reg16 = S86_MnemonicOp_BX, .reg = &register_file.bx, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_BL, .mnemonic_op_reg16 = S86_MnemonicOp_BX, .reg = &register_file.bx, .mask = 0x00FF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_BL, .mnemonic_op_reg16 = S86_MnemonicOp_BX, .reg = &register_file.bx, .byte = S86_RegisterByte_Lo},
{.mnemonic_op = S86_MnemonicOp_BH, .mnemonic_op_reg16 = S86_MnemonicOp_BX, .reg = &register_file.bx, .mask = 0xFF00, .r_shift = 8}, {.mnemonic_op = S86_MnemonicOp_BH, .mnemonic_op_reg16 = S86_MnemonicOp_BX, .reg = &register_file.bx, .byte = S86_RegisterByte_Hi},
{.mnemonic_op = S86_MnemonicOp_SP, .mnemonic_op_reg16 = S86_MnemonicOp_SP, .reg = &register_file.sp, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_SP, .mnemonic_op_reg16 = S86_MnemonicOp_SP, .reg = &register_file.sp, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_BP, .mnemonic_op_reg16 = S86_MnemonicOp_BP, .reg = &register_file.bp, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_BP, .mnemonic_op_reg16 = S86_MnemonicOp_BP, .reg = &register_file.bp, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_SI, .mnemonic_op_reg16 = S86_MnemonicOp_SI, .reg = &register_file.si, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_SI, .mnemonic_op_reg16 = S86_MnemonicOp_SI, .reg = &register_file.si, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_DI, .mnemonic_op_reg16 = S86_MnemonicOp_DI, .reg = &register_file.di, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_DI, .mnemonic_op_reg16 = S86_MnemonicOp_DI, .reg = &register_file.di, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_ES, .mnemonic_op_reg16 = S86_MnemonicOp_ES, .reg = &register_file.es, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_ES, .mnemonic_op_reg16 = S86_MnemonicOp_ES, .reg = &register_file.es, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_CS, .mnemonic_op_reg16 = S86_MnemonicOp_CS, .reg = &register_file.cs, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_CS, .mnemonic_op_reg16 = S86_MnemonicOp_CS, .reg = &register_file.cs, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_SS, .mnemonic_op_reg16 = S86_MnemonicOp_SS, .reg = &register_file.ss, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_SS, .mnemonic_op_reg16 = S86_MnemonicOp_SS, .reg = &register_file.ss, .byte = S86_RegisterByte_Nil},
{.mnemonic_op = S86_MnemonicOp_DS, .mnemonic_op_reg16 = S86_MnemonicOp_DS, .reg = &register_file.ds, .mask = 0xFFFF, .r_shift = 0}, {.mnemonic_op = S86_MnemonicOp_DS, .mnemonic_op_reg16 = S86_MnemonicOp_DS, .reg = &register_file.ds, .byte = S86_RegisterByte_Nil},
}; };
while (S86_BufferIteratorHasMoreBytes(buffer_it)) { while (S86_BufferIteratorHasMoreBytes(buffer_it)) {
@ -1186,22 +1202,116 @@ int main(int argc, char **argv)
if (opcode.mnemonic == S86_Mnemonic_LOCK || opcode.mnemonic == S86_Mnemonic_SEGMENT) if (opcode.mnemonic == S86_Mnemonic_LOCK || opcode.mnemonic == S86_Mnemonic_SEGMENT)
continue; continue;
if (exec_mode && opcode.mnemonic == S86_Mnemonic_MOV) { if (!exec_mode) {
S86_Print(S86_STR8("\n"));
continue;
}
bool prev_sign_flag = register_file.sign_flag;
bool prev_zero_flag = register_file.zero_flag;
switch (opcode.mnemonic) {
case S86_Mnemonic_PUSH: /*FALLTHRU*/
case S86_Mnemonic_POP: /*FALLTHRU*/
case S86_Mnemonic_XCHG: /*FALLTHRU*/
case S86_Mnemonic_IN: /*FALLTHRU*/
case S86_Mnemonic_OUT: /*FALLTHRU*/
case S86_Mnemonic_XLAT: /*FALLTHRU*/
case S86_Mnemonic_LEA: /*FALLTHRU*/
case S86_Mnemonic_LDS: /*FALLTHRU*/
case S86_Mnemonic_LES: /*FALLTHRU*/
case S86_Mnemonic_LAHF: /*FALLTHRU*/
case S86_Mnemonic_SAHF: /*FALLTHRU*/
case S86_Mnemonic_PUSHF: /*FALLTHRU*/
case S86_Mnemonic_POPF: /*FALLTHRU*/
case S86_Mnemonic_ADC: /*FALLTHRU*/
case S86_Mnemonic_INC: /*FALLTHRU*/
case S86_Mnemonic_AAA: /*FALLTHRU*/
case S86_Mnemonic_DAA: /*FALLTHRU*/
case S86_Mnemonic_SBB: /*FALLTHRU*/
case S86_Mnemonic_DEC: /*FALLTHRU*/
case S86_Mnemonic_NEG: /*FALLTHRU*/
case S86_Mnemonic_AAS: /*FALLTHRU*/
case S86_Mnemonic_DAS: /*FALLTHRU*/
case S86_Mnemonic_MUL: /*FALLTHRU*/
case S86_Mnemonic_IMUL: /*FALLTHRU*/
case S86_Mnemonic_AAM: /*FALLTHRU*/
case S86_Mnemonic_DIV: /*FALLTHRU*/
case S86_Mnemonic_IDIV: /*FALLTHRU*/
case S86_Mnemonic_AAD: /*FALLTHRU*/
case S86_Mnemonic_CBW: /*FALLTHRU*/
case S86_Mnemonic_CWD: /*FALLTHRU*/
case S86_Mnemonic_NOT: /*FALLTHRU*/
case S86_Mnemonic_SHL_SAL: /*FALLTHRU*/
case S86_Mnemonic_SHR: /*FALLTHRU*/
case S86_Mnemonic_SAR: /*FALLTHRU*/
case S86_Mnemonic_ROL: /*FALLTHRU*/
case S86_Mnemonic_ROR: /*FALLTHRU*/
case S86_Mnemonic_RCL: /*FALLTHRU*/
case S86_Mnemonic_RCR: /*FALLTHRU*/
case S86_Mnemonic_AND: /*FALLTHRU*/
case S86_Mnemonic_TEST: /*FALLTHRU*/
case S86_Mnemonic_OR: /*FALLTHRU*/
case S86_Mnemonic_XOR: /*FALLTHRU*/
case S86_Mnemonic_REP: /*FALLTHRU*/
case S86_Mnemonic_CALL: /*FALLTHRU*/
case S86_Mnemonic_JMP: /*FALLTHRU*/
case S86_Mnemonic_RET: /*FALLTHRU*/
case S86_Mnemonic_JE_JZ: /*FALLTHRU*/
case S86_Mnemonic_JL_JNGE: /*FALLTHRU*/
case S86_Mnemonic_JLE_JNG: /*FALLTHRU*/
case S86_Mnemonic_JB_JNAE: /*FALLTHRU*/
case S86_Mnemonic_JBE_JNA: /*FALLTHRU*/
case S86_Mnemonic_JP_JPE: /*FALLTHRU*/
case S86_Mnemonic_JO: /*FALLTHRU*/
case S86_Mnemonic_JS: /*FALLTHRU*/
case S86_Mnemonic_JNE_JNZ: /*FALLTHRU*/
case S86_Mnemonic_JNL_JGE: /*FALLTHRU*/
case S86_Mnemonic_JNLE_JG: /*FALLTHRU*/
case S86_Mnemonic_JNB_JAE: /*FALLTHRU*/
case S86_Mnemonic_JNBE_JA: /*FALLTHRU*/
case S86_Mnemonic_JNP_JO: /*FALLTHRU*/
case S86_Mnemonic_JNO: /*FALLTHRU*/
case S86_Mnemonic_JNS: /*FALLTHRU*/
case S86_Mnemonic_LOOP: /*FALLTHRU*/
case S86_Mnemonic_LOOPZ_LOOPE: /*FALLTHRU*/
case S86_Mnemonic_LOOPNZ_LOOPNE: /*FALLTHRU*/
case S86_Mnemonic_JCXZ: /*FALLTHRU*/
case S86_Mnemonic_INT: /*FALLTHRU*/
case S86_Mnemonic_INT3: /*FALLTHRU*/
case S86_Mnemonic_INTO: /*FALLTHRU*/
case S86_Mnemonic_IRET: /*FALLTHRU*/
case S86_Mnemonic_CLC: /*FALLTHRU*/
case S86_Mnemonic_CMC: /*FALLTHRU*/
case S86_Mnemonic_STC: /*FALLTHRU*/
case S86_Mnemonic_CLD: /*FALLTHRU*/
case S86_Mnemonic_STD: /*FALLTHRU*/
case S86_Mnemonic_CLI: /*FALLTHRU*/
case S86_Mnemonic_STI: /*FALLTHRU*/
case S86_Mnemonic_HLT: /*FALLTHRU*/
case S86_Mnemonic_WAIT: /*FALLTHRU*/
case S86_Mnemonic_LOCK: /*FALLTHRU*/
case S86_Mnemonic_SEGMENT: break;
case S86_Mnemonic_MOV: {
S86_MnemonicOpToRegisterFileMap const *dest_map = NULL; S86_MnemonicOpToRegisterFileMap const *dest_map = NULL;
for (size_t index = 0; !dest_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) { for (size_t index = 0; !dest_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) {
S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index; S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index;
if (item->mnemonic_op == opcode.dest) if (item->mnemonic_op == opcode.dest)
dest_map = item; dest_map = item;
} }
S86_ASSERT(dest_map); S86_ASSERT(dest_map);
uint16_t *dest = dest_map->reg;
uint16_t src = 0;
uint16_t prev_dest = dest_map->reg->word;
bool byte_op = opcode.dest >= S86_MnemonicOp_AL && opcode.dest <= S86_MnemonicOp_BH;
if (opcode.src == S86_MnemonicOp_Immediate) { if (opcode.src == S86_MnemonicOp_Immediate) {
src = (uint16_t)opcode.immediate; if (byte_op) {
} else if ((opcode.src >= S86_MnemonicOp_AL && opcode.src <= S86_MnemonicOp_DI) || S86_ASSERT(opcode.immediate < S86_CAST(uint8_t)-1);
(opcode.src >= S86_MnemonicOp_ES && opcode.src <= S86_MnemonicOp_DS)) { dest_map->reg->bytes[dest_map->byte] = S86_CAST(uint8_t)opcode.immediate;
} else {
S86_ASSERT(opcode.immediate < S86_CAST(uint16_t)-1);
dest_map->reg->word = S86_CAST(uint16_t)opcode.immediate;
}
} else {
S86_MnemonicOpToRegisterFileMap const *src_map = NULL; S86_MnemonicOpToRegisterFileMap const *src_map = NULL;
for (size_t index = 0; !src_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) { for (size_t index = 0; !src_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) {
S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index; S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index;
@ -1209,33 +1319,185 @@ int main(int argc, char **argv)
src_map = item; src_map = item;
} }
src = (*src_map->reg & src_map->mask) >> src_map->r_shift; if (byte_op)
dest_map->reg->bytes[dest_map->byte] = src_map->reg->bytes[src_map->byte];
else
dest_map->reg->word = src_map->reg->word;
} }
S86_Str8 dest_reg16 = S86_MnemonicOpStr8(dest_map->mnemonic_op_reg16); S86_Str8 dest_reg16 = S86_MnemonicOpStr8(dest_map->mnemonic_op_reg16);
uint16_t new_dest = (*dest & ~dest_map->mask) | (src << dest_map->r_shift); S86_PrintFmt(" ; %.*s:0x%x->0x%x ", S86_STR8_FMT(dest_reg16), prev_dest, dest_map->reg->word);
S86_PrintFmt(" ; %.*s:0x%x->0x%x ", S86_STR8_FMT(dest_reg16), *dest, new_dest); } break;
*dest = new_dest;
case S86_Mnemonic_ADD: {
S86_MnemonicOpToRegisterFileMap const *dest_map = NULL;
for (size_t index = 0; !dest_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) {
S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index;
if (item->mnemonic_op == opcode.dest)
dest_map = item;
}
S86_ASSERT(dest_map);
uint16_t prev_dest = dest_map->reg->word;
bool byte_op = opcode.dest >= S86_MnemonicOp_AL && opcode.dest <= S86_MnemonicOp_BH;
if (opcode.src == S86_MnemonicOp_Immediate) {
if (byte_op) {
S86_ASSERT(opcode.immediate < S86_CAST(uint8_t)-1);
dest_map->reg->bytes[dest_map->byte] += S86_CAST(uint8_t)opcode.immediate;
} else {
S86_ASSERT(opcode.immediate < S86_CAST(uint16_t)-1);
dest_map->reg->word += S86_CAST(uint16_t)opcode.immediate;
}
} else {
S86_MnemonicOpToRegisterFileMap const *src_map = NULL;
for (size_t index = 0; !src_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) {
S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index;
if (item->mnemonic_op == opcode.src)
src_map = item;
}
if (byte_op)
dest_map->reg->bytes[dest_map->byte] += src_map->reg->bytes[src_map->byte];
else
dest_map->reg->word += src_map->reg->word;
}
S86_Str8 dest_reg16 = S86_MnemonicOpStr8(dest_map->mnemonic_op_reg16);
register_file.sign_flag = dest_map->reg->word & (byte_op ? 0b0000'0000'1000'0000 : 0b1000'0000'0000'0000);
S86_PrintFmt(" ; %.*s:0x%x->0x%x ", S86_STR8_FMT(dest_reg16), prev_dest, dest_map->reg->word);
} break;
case S86_Mnemonic_SUB: {
S86_MnemonicOpToRegisterFileMap const *dest_map = NULL;
for (size_t index = 0; !dest_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) {
S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index;
if (item->mnemonic_op == opcode.dest)
dest_map = item;
}
S86_ASSERT(dest_map);
uint16_t prev_dest = dest_map->reg->word;
bool byte_op = opcode.dest >= S86_MnemonicOp_AL && opcode.dest <= S86_MnemonicOp_BH;
if (opcode.src == S86_MnemonicOp_Immediate) {
if (byte_op) {
S86_ASSERT(opcode.immediate < S86_CAST(uint8_t)-1);
dest_map->reg->bytes[dest_map->byte] -= S86_CAST(uint8_t)opcode.immediate;
} else {
S86_ASSERT(opcode.immediate < S86_CAST(uint16_t)-1);
dest_map->reg->word -= S86_CAST(uint16_t)opcode.immediate;
}
} else {
S86_MnemonicOpToRegisterFileMap const *src_map = NULL;
for (size_t index = 0; !src_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) {
S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index;
if (item->mnemonic_op == opcode.src)
src_map = item;
}
if (byte_op)
dest_map->reg->bytes[dest_map->byte] -= src_map->reg->bytes[src_map->byte];
else
dest_map->reg->word -= src_map->reg->word;
}
S86_Str8 dest_reg16 = S86_MnemonicOpStr8(dest_map->mnemonic_op_reg16);
register_file.zero_flag = byte_op ? dest_map->reg->bytes[dest_map->byte] == 0 : dest_map->reg->word == 0;
register_file.sign_flag = dest_map->reg->word & (byte_op ? 0b0000'0000'1000'0000 : 0b1000'0000'0000'0000);
S86_PrintFmt(" ; %.*s:0x%x->0x%x ", S86_STR8_FMT(dest_reg16), prev_dest, dest_map->reg->word);
} break;
case S86_Mnemonic_CMP: {
S86_MnemonicOpToRegisterFileMap const *dest_map = NULL;
for (size_t index = 0; !dest_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) {
S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index;
if (item->mnemonic_op == opcode.dest)
dest_map = item;
}
S86_ASSERT(dest_map);
S86_Register16 dest_copy = *dest_map->reg;
S86_Register16 *dest = &dest_copy;
bool byte_op = opcode.dest >= S86_MnemonicOp_AL && opcode.dest <= S86_MnemonicOp_BH;
if (opcode.src == S86_MnemonicOp_Immediate) {
if (byte_op) {
S86_ASSERT(opcode.immediate < S86_CAST(uint8_t)-1);
dest->bytes[dest_map->byte] -= S86_CAST(uint8_t)opcode.immediate;
} else {
S86_ASSERT(opcode.immediate < S86_CAST(uint16_t)-1);
dest->word -= S86_CAST(uint16_t)opcode.immediate;
}
} else {
S86_MnemonicOpToRegisterFileMap const *src_map = NULL;
for (size_t index = 0; !src_map && index < S86_ARRAY_UCOUNT(mnemonic_op_to_register_file_map); index++) {
S86_MnemonicOpToRegisterFileMap const *item = mnemonic_op_to_register_file_map + index;
if (item->mnemonic_op == opcode.src)
src_map = item;
}
if (byte_op)
dest->bytes[dest_map->byte] -= src_map->reg->bytes[src_map->byte];
else
dest->word -= src_map->reg->word;
}
register_file.sign_flag = dest_map->reg->word & (byte_op ? 0b0000'0000'1000'0000 : 0b1000'0000'0000'0000);
S86_PrintFmt(" ; ");
} break;
}
if (register_file.sign_flag != prev_sign_flag) {
if (register_file.sign_flag) {
S86_PrintFmt("flags:->S ");
} else {
S86_PrintFmt("flags:S-> ");
}
}
if (register_file.zero_flag != prev_zero_flag) {
if (register_file.zero_flag) {
S86_PrintFmt("flags:->PZ ");
} else {
S86_PrintFmt("flags:PZ-> ");
}
} }
S86_Print(S86_STR8("\n")); S86_Print(S86_STR8("\n"));
} }
if (exec_mode) { if (exec_mode) {
S86_PrintLn(S86_STR8("\nFinal registers:")); S86_PrintLn(S86_STR8("\nFinal registers:"));
S86_PrintLnFmt(" ax: 0x%04x (%u)", register_file.ax, register_file.ax); if (register_file.ax.word)
S86_PrintLnFmt(" bx: 0x%04x (%u)", register_file.bx, register_file.bx); S86_PrintLnFmt(" ax: 0x%04x (%u)", register_file.ax.word, register_file.ax.word);
S86_PrintLnFmt(" cx: 0x%04x (%u)", register_file.cx, register_file.cx); if (register_file.bx.word)
S86_PrintLnFmt(" dx: 0x%04x (%u)", register_file.dx, register_file.dx); S86_PrintLnFmt(" bx: 0x%04x (%u)", register_file.bx.word, register_file.bx.word);
S86_PrintLnFmt(" sp: 0x%04x (%u)", register_file.sp, register_file.sp); if (register_file.cx.word)
S86_PrintLnFmt(" bp: 0x%04x (%u)", register_file.bp, register_file.bp); S86_PrintLnFmt(" cx: 0x%04x (%u)", register_file.cx.word, register_file.cx.word);
S86_PrintLnFmt(" si: 0x%04x (%u)", register_file.si, register_file.si); if (register_file.dx.word)
S86_PrintLnFmt(" di: 0x%04x (%u)", register_file.di, register_file.di); S86_PrintLnFmt(" dx: 0x%04x (%u)", register_file.dx.word, register_file.dx.word);
if (register_file.es) if (register_file.sp.word)
S86_PrintLnFmt(" sp: 0x%04x (%u)", register_file.sp.word, register_file.sp.word);
if (register_file.bp.word)
S86_PrintLnFmt(" bp: 0x%04x (%u)", register_file.bp.word, register_file.bp.word);
if (register_file.si.word)
S86_PrintLnFmt(" si: 0x%04x (%u)", register_file.si.word, register_file.si.word);
if (register_file.di.word)
S86_PrintLnFmt(" di: 0x%04x (%u)", register_file.di.word, register_file.di.word);
if (register_file.es.word)
S86_PrintLnFmt(" es: 0x%04x (%u)", register_file.es, register_file.es); S86_PrintLnFmt(" es: 0x%04x (%u)", register_file.es, register_file.es);
if (register_file.ss) if (register_file.ss.word)
S86_PrintLnFmt(" ss: 0x%04x (%u)", register_file.ss, register_file.ss); S86_PrintLnFmt(" ss: 0x%04x (%u)", register_file.ss, register_file.ss);
if (register_file.ds) if (register_file.ds.word)
S86_PrintLnFmt(" ds: 0x%04x (%u)", register_file.ds, register_file.ds); S86_PrintLnFmt(" ds: 0x%04x (%u)", register_file.ds, register_file.ds);
if (register_file.zero_flag || register_file.sign_flag) {
S86_PrintFmt(" flags:");
if (register_file.zero_flag)
S86_PrintFmt(" PZ");
if (register_file.sign_flag)
S86_PrintFmt(" S");
S86_Print(S86_STR8("\n"));
}
S86_Print(S86_STR8("\n")); S86_Print(S86_STR8("\n"));
} }
} }

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project.rdbg
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