---
arm-asm.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
arm-tok.h | 10 ++++++++++
2 files changed, 57 insertions(+)
diff --git a/arm-asm.c b/arm-asm.c
index b6dfafe..c2598a8 100644
--- a/arm-asm.c
+++ b/arm-asm.c
@@ -190,6 +190,47 @@ static void asm_unary_opcode(TCCState *s1, int token)
}
}
+static void asm_binary_opcode(TCCState *s1, int token)
+{
+ Operand ops[2];
+ parse_operand(s1, &ops[0]);
+ if (tok == ',')
+ next();
+ else
+ expect("','");
+ parse_operand(s1, &ops[1]);
+ if (ops[0].type != OP_REG32) {
+ expect("(destination operand) register");
+ return;
+ }
+
+ if (ops[1].type != OP_REG32)
+ expect("(source operand) register");
+ else switch (ARM_INSTRUCTION_GROUP(token)) {
+ case TOK_ASM_clzeq:
+ asm_emit_opcode(token, 0x16f0f10 | (ops[0].reg << 12) | ops[1].reg);
+ break;
+ case TOK_ASM_sxtbeq:
+ /* TODO: optional ROR (8|16|24) */
+ asm_emit_opcode(token, 0x6af0070 | (ops[0].reg << 12) | ops[1].reg);
+ break;
+ case TOK_ASM_sxtheq:
+ /* TODO: optional ROR (8|16|24) */
+ asm_emit_opcode(token, 0x6bf0070 | (ops[0].reg << 12) | ops[1].reg);
+ break;
+ case TOK_ASM_uxtbeq:
+ /* TODO: optional ROR (8|16|24) */
+ asm_emit_opcode(token, 0x6ef0070 | (ops[0].reg << 12) | ops[1].reg);
+ break;
+ case TOK_ASM_uxtheq:
+ /* TODO: optional ROR (8|16|24) */
+ asm_emit_opcode(token, 0x6ff0070 | (ops[0].reg << 12) | ops[1].reg);
+ break;
+ default:
+ expect("binary instruction");
+ }
+}
+
static void asm_block_data_transfer_opcode(TCCState *s1, int token)
{
uint32_t opcode;
@@ -268,6 +309,12 @@ ST_FUNC void asm_opcode(TCCState *s1, int token)
return asm_nullary_opcode(token);
case TOK_ASM_swieq:
return asm_unary_opcode(s1, token);
+ case TOK_ASM_clzeq:
+ case TOK_ASM_sxtbeq:
+ case TOK_ASM_sxtheq:
+ case TOK_ASM_uxtbeq:
+ case TOK_ASM_uxtheq:
+ return asm_binary_opcode(s1, token);
default:
expect("known instruction");
}
diff --git a/arm-tok.h b/arm-tok.h
index db1935f..06cee7a 100644
--- a/arm-tok.h
+++ b/arm-tok.h
@@ -56,6 +56,16 @@
DEF_ASM_CONDED(wfi)
DEF_ASM_CONDED(swi)
+ /* misc */
+ DEF_ASM_CONDED(clz)
+
+ /* size conversion */
+
+ DEF_ASM_CONDED(sxtb)
+ DEF_ASM_CONDED(sxth)
+ DEF_ASM_CONDED(uxtb)
+ DEF_ASM_CONDED(uxth)
+
/* instruction macros */
DEF_ASM_CONDED(push)
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