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arm-asm: Add push, pop

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Also edited tcctok.h to not redefine push, pop
This commit is contained in:
Danny Milosavljevic 2020-12-26 16:43:01 +01:00
parent c5428cd19c
commit b495959e4b
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GPG Key ID: E71A35542C30BAA5
3 changed files with 64 additions and 1 deletions
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58
arm-asm.c
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@ -171,6 +171,61 @@ static void asm_nullary_opcode(int token)
}
}
static void asm_block_data_transfer_opcode(TCCState *s1, int token)
{
uint32_t opcode;
int op0_exclam;
Operand ops[2];
int nb_ops = 1;
parse_operand(s1, &ops[0]);
if (tok == '!') {
op0_exclam = 1;
next(); // skip '!'
}
if (tok == ',') {
next(); // skip comma
parse_operand(s1, &ops[1]);
++nb_ops;
}
if (nb_ops < 1) {
expect("at least one operand");
return;
} else if (ops[nb_ops - 1].type != OP_REGSET32) {
expect("(last operand) register list");
return;
}
// block data transfer: 1 0 0 P U S W L << 20 (general case):
// operands:
// Rn: bits 19...16 base register
// Register List: bits 15...0
switch (ARM_INSTRUCTION_GROUP(token)) {
case TOK_ASM_pusheq: // TODO: Optimize 1-register case to: str ?, [sp, #-4]!
// Instruction: 1 I=0 P=1 U=0 S=0 W=1 L=0 << 20, op 1101
// operands:
// Rn: base register
// Register List: bits 15...0
if (nb_ops != 1)
expect("exactly one operand");
else
asm_emit_opcode(token, (0x92d << 16) | ops[0].regset); // TODO: base register ?
break;
case TOK_ASM_popeq: // TODO: Optimize 1-register case to: ldr ?, [sp], #4
// Instruction: 1 I=0 P=0 U=1 S=0 W=0 L=1 << 20, op 1101
// operands:
// Rn: base register
// Register List: bits 15...0
if (nb_ops != 1)
expect("exactly one operand");
else
asm_emit_opcode(token, (0x8bd << 16) | ops[0].regset); // TODO: base register ?
break;
default:
expect("block data transfer instruction");
}
}
ST_FUNC void asm_opcode(TCCState *s1, int token)
{
while (token == TOK_LINEFEED) {
@ -185,6 +240,9 @@ ST_FUNC void asm_opcode(TCCState *s1, int token)
}
switch (ARM_INSTRUCTION_GROUP(token)) {
case TOK_ASM_pusheq:
case TOK_ASM_popeq:
return asm_block_data_transfer_opcode(s1, token);
case TOK_ASM_nopeq:
case TOK_ASM_wfeeq:
case TOK_ASM_wfieq:

5
arm-tok.h
View File

@ -54,3 +54,8 @@
DEF_ASM_CONDED(nop)
DEF_ASM_CONDED(wfe)
DEF_ASM_CONDED(wfi)
/* instruction macros */
DEF_ASM_CONDED(push)
DEF_ASM_CONDED(pop)

2
tcctok.h
View File

@ -171,7 +171,7 @@
/* pragma */
DEF(TOK_pack, "pack")
#if !defined(TCC_TARGET_I386) && !defined(TCC_TARGET_X86_64)
#if !defined(TCC_TARGET_I386) && !defined(TCC_TARGET_X86_64) && !defined(TCC_TARGET_ARM)
/* already defined for assembler */
DEF(TOK_ASM_push, "push")
DEF(TOK_ASM_pop, "pop")