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arm-asm: Add mcr, mrc

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Danny Milosavljevic 2021-01-13 03:16:56 +01:00
parent a1dad7a9f7
commit d1a6c4aefa
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GPG Key ID: E71A35542C30BAA5
3 changed files with 48 additions and 8 deletions
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50
arm-asm.c
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@ -336,6 +336,7 @@ static void asm_coprocessor_opcode(TCCState *s1, int token) {
uint8_t registers[3];
unsigned int i;
uint8_t high_nibble;
uint8_t mrc = 0;
if (tok >= TOK_ASM_p0 && tok <= TOK_ASM_p15) {
coprocessor = tok - TOK_ASM_p0;
@ -361,12 +362,22 @@ static void asm_coprocessor_opcode(TCCState *s1, int token) {
next();
else
expect("','");
if (tok >= TOK_ASM_c0 && tok <= TOK_ASM_c15) {
registers[i] = tok - TOK_ASM_c0;
next();
if (i == 0 && token != TOK_ASM_cdp2 && (ARM_INSTRUCTION_GROUP(token) == TOK_ASM_mrceq || ARM_INSTRUCTION_GROUP(token) == TOK_ASM_mcreq)) {
if (tok >= TOK_ASM_r0 && tok <= TOK_ASM_r15) {
registers[i] = tok - TOK_ASM_r0;
next();
} else {
expect("'r<number>'");
return;
}
} else {
expect("'c<number>");
return;
if (tok >= TOK_ASM_c0 && tok <= TOK_ASM_c15) {
registers[i] = tok - TOK_ASM_c0;
next();
} else {
expect("'c<number>'");
return;
}
}
}
if (tok == ',') {
@ -381,11 +392,32 @@ static void asm_coprocessor_opcode(TCCState *s1, int token) {
return;
}
if (token == TOK_ASM_cdp2)
if (token == TOK_ASM_cdp2) {
high_nibble = 0xF;
else
asm_emit_coprocessor_opcode(high_nibble, coprocessor, opcode1.e.v, registers[0], registers[1], registers[2], opcode2.e.v, 0);
return;
} else
high_nibble = condition_code_of_token(token);
asm_emit_coprocessor_opcode(high_nibble, coprocessor, opcode1.e.v, registers[0], registers[1], registers[2], opcode2.e.v, 0);
switch (ARM_INSTRUCTION_GROUP(token)) {
case TOK_ASM_cdpeq:
asm_emit_coprocessor_opcode(high_nibble, coprocessor, opcode1.e.v, registers[0], registers[1], registers[2], opcode2.e.v, 0);
break;
case TOK_ASM_mrceq:
// opcode1 encoding changes! highest and lowest bit gone.
mrc = 1;
/* fallthrough */
case TOK_ASM_mcreq:
// opcode1 encoding changes! highest and lowest bit gone.
if (opcode1.e.v > 7) {
tcc_error("opcode1 of instruction '%s' must be an immediate value between 0 and 7", get_tok_str(token, NULL));
return;
}
asm_emit_coprocessor_opcode(high_nibble, coprocessor, (opcode1.e.v << 1) | mrc, registers[0], registers[1], registers[2], opcode2.e.v, 1);
break;
default:
expect("known instruction");
}
}
/* data processing and single data transfer instructions only */
@ -1554,6 +1586,8 @@ ST_FUNC void asm_opcode(TCCState *s1, int token)
return asm_long_multiplication_opcode(s1, token);
case TOK_ASM_cdpeq:
case TOK_ASM_mcreq:
case TOK_ASM_mrceq:
return asm_coprocessor_opcode(s1, token);
default:
expect("known instruction");

2
arm-tok.h
View File

@ -214,3 +214,5 @@
DEF_ASM_CONDED(rrxs)
DEF_ASM_CONDED(cdp)
DEF_ASM_CONDED(mcr)
DEF_ASM_CONDED(mrc)

4
tests/arm-asm-testsuite.sh
View File

@ -82,6 +82,10 @@ do
"r2, [r3, #-0x45]" \
"r2, r3, #4" \
"r2, r3, #-4" \
"p10, #7, c2, c0, c1, #4" \
"p10, #7, r2, c0, c1, #4" \
"p10, #0, c2, c0, c1, #4" \
"p10, #0, r2, c0, c1, #4" \
"r2, #4" \
"r2, #-4" \
"r2, #0xEFFF" \