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negative immediate add

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Folkert 2023-09-15 17:03:28 +02:00
parent 7387d2342b
commit 7f927dcb0c
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1 changed files with 5 additions and 3 deletions
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8
crates/compiler/gen_dev/src/generic64/aarch64.rs
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@ -880,7 +880,9 @@ impl Assembler<AArch64GeneralReg, AArch64FloatReg> for AArch64Assembler {
imm32: i32,
) {
if imm32 < 0 {
todo!("immediate addition with values less than 0");
// add immediates must be signed, so we have to use a register here
Self::mov_reg64_imm64(buf, dst, imm32 as i64);
add_reg64_reg64_reg64(buf, dst, src, dst);
} else if imm32 < 0xFFF {
add_reg64_reg64_imm12(buf, dst, src, imm32 as u16);
} else {
@ -2733,10 +2735,10 @@ fn add_reg64_reg64_imm12(
let inst = ArithmeticImmediate::new(ArithmeticImmediateParams {
op: false,
s: false,
sh: false,
imm12,
rd: dst,
rn: src,
imm12,
sh: false,
});
buf.extend(inst.bytes());