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perfaware/part1: Add support for AND

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This commit is contained in:
doyle 2023-03-19 16:03:16 +11:00
parent 657543d584
commit 3c6d285c62
1 changed files with 27 additions and 10 deletions
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31
part1/sim8086.c
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@ -130,6 +130,10 @@ typedef enum S86_InstructionType {
S86_InstructionType_DECReg,
S86_InstructionType_NEG,
S86_InstructionType_CMPRegOrMemAndReg,
S86_InstructionType_CMPImmediateWithRegOrMem,
S86_InstructionType_CMPImmediateWithAccum,
S86_InstructionType_AAS,
S86_InstructionType_DAS,
@ -151,9 +155,9 @@ typedef enum S86_InstructionType {
S86_InstructionType_RCL,
S86_InstructionType_RCR,
S86_InstructionType_CMPRegOrMemAndReg,
S86_InstructionType_CMPImmediateWithRegOrMem,
S86_InstructionType_CMPImmediateWithAccum,
S86_InstructionType_ANDRegWithMemToEither,
S86_InstructionType_ANDImmediateToRegOrMem,
S86_InstructionType_ANDImmediateToAccum,
S86_InstructionType_JE_JZ,
S86_InstructionType_JL_JNGE,
@ -630,6 +634,13 @@ int main(int argc, char **argv)
[S86_InstructionType_RCR] = {.op_mask0 = 0b1111'1100, .op_mask1 = 0b0011'1000,
.op_bits0 = 0b1101'0000, .op_bits1 = 0b0001'1000, .mnemonic = S86_STR8("rcr")},
[S86_InstructionType_ANDRegWithMemToEither] = {.op_mask0 = 0b1111'1100, .op_mask1 = 0b0000'0000,
.op_bits0 = 0b0010'0000, .op_bits1 = 0b0000'0000, .mnemonic = S86_STR8("and")},
[S86_InstructionType_ANDImmediateToRegOrMem] = {.op_mask0 = 0b1111'1110, .op_mask1 = 0b0011'1000,
.op_bits0 = 0b1000'0000, .op_bits1 = 0b0010'0000, .mnemonic = S86_STR8("and")},
[S86_InstructionType_ANDImmediateToAccum] = {.op_mask0 = 0b1111'1110, .op_mask1 = 0b0000'0000,
.op_bits0 = 0b0010'0100, .op_bits1 = 0b0000'0000, .mnemonic = S86_STR8("and")},
[S86_InstructionType_JE_JZ] = {.op_mask0 = 0b1111'1111, .op_mask1 = 0b0000'0000,
.op_bits0 = 0b0111'0100, .op_bits1 = 0b0000'0000, .mnemonic = S86_STR8("je")},
[S86_InstructionType_JL_JNGE] = {.op_mask0 = 0b1111'1111, .op_mask1 = 0b0000'0000,
@ -817,6 +828,7 @@ int main(int argc, char **argv)
case S86_InstructionType_ADCRegOrMemWithRegToEither: /*FALLTHRU*/
case S86_InstructionType_SUBRegOrMemToOrFromReg: /*FALLTHRU*/
case S86_InstructionType_SBBRegOrMemAndRegToEither: /*FALLTHRU*/
case S86_InstructionType_ANDRegWithMemToEither: /*FALLTHRU*/
case S86_InstructionType_LEA: /*FALLTHRU*/
case S86_InstructionType_LDS: /*FALLTHRU*/
case S86_InstructionType_LES: /*FALLTHRU*/
@ -872,6 +884,7 @@ int main(int argc, char **argv)
case S86_InstructionType_SUBImmediateFromRegOrMem: /*FALLTHRU*/
case S86_InstructionType_SBBImmediateFromRegOrMem: /*FALLTHRU*/
case S86_InstructionType_CMPImmediateWithRegOrMem: /*FALLTHRU*/
case S86_InstructionType_ANDImmediateToRegOrMem: /*FALLTHRU*/
case S86_InstructionType_MOVImmediateToRegOrMem: {
S86_ASSERT(op_code_size == 2);
uint8_t w = (op_code_bytes[0] & 0b0000'0001) >> 0;
@ -893,7 +906,8 @@ int main(int argc, char **argv)
instruction_type == S86_InstructionType_ADCImmediateToRegOrMem ||
instruction_type == S86_InstructionType_SUBImmediateFromRegOrMem ||
instruction_type == S86_InstructionType_SBBImmediateFromRegOrMem ||
instruction_type == S86_InstructionType_CMPImmediateWithRegOrMem) && s) {
instruction_type == S86_InstructionType_CMPImmediateWithRegOrMem ||
instruction_type == S86_InstructionType_ANDImmediateToRegOrMem) && s) {
sign_extend_8bit_data = true;
} else {
uint8_t data_hi = S86_BufferIteratorNextByte(&buffer_it);
@ -926,6 +940,7 @@ int main(int argc, char **argv)
case S86_InstructionType_SUBImmediateFromAccum: /*FALLTHRU*/
case S86_InstructionType_SBBImmediateFromAccum: /*FALLTHRU*/
case S86_InstructionType_CMPImmediateWithAccum: /*FALLTHRU*/
case S86_InstructionType_ANDImmediateToAccum: /*FALLTHRU*/
case S86_InstructionType_MOVImmediateToReg: {
// NOTE: Parse opcode control bits
// =============================================================
@ -935,7 +950,8 @@ int main(int argc, char **argv)
instruction_type == S86_InstructionType_ADCImmediateToAccum ||
instruction_type == S86_InstructionType_SUBImmediateFromAccum ||
instruction_type == S86_InstructionType_SBBImmediateFromAccum ||
instruction_type == S86_InstructionType_CMPImmediateWithAccum) {
instruction_type == S86_InstructionType_CMPImmediateWithAccum ||
instruction_type == S86_InstructionType_ANDImmediateToAccum) {
w = (op_code_bytes[0] & 0b0000'0001) >> 0;
} else {
w = (op_code_bytes[0] & 0b0000'1000) >> 3;
@ -960,11 +976,12 @@ int main(int argc, char **argv)
instruction_type == S86_InstructionType_ADCImmediateToAccum ||
instruction_type == S86_InstructionType_SUBImmediateFromAccum ||
instruction_type == S86_InstructionType_SBBImmediateFromAccum ||
instruction_type == S86_InstructionType_CMPImmediateWithAccum);
instruction_type == S86_InstructionType_CMPImmediateWithAccum ||
instruction_type == S86_InstructionType_ANDImmediateToAccum);
if (w) {
dest_register = S86_STR8("ax");
} else {
data = (uint16_t)(int8_t)data; // Sign extension
data = S86_CAST(uint16_t)S86_CAST(int8_t)data; // Sign extension
dest_register = S86_STR8("al");
}
}