diff options
Diffstat (limited to 'yjit/src/asm/arm64/inst/halfword_imm.rs')
| -rw-r--r-- | yjit/src/asm/arm64/inst/halfword_imm.rs | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/yjit/src/asm/arm64/inst/halfword_imm.rs b/yjit/src/asm/arm64/inst/halfword_imm.rs index 675e33d4a8..c31d1f8945 100644 --- a/yjit/src/asm/arm64/inst/halfword_imm.rs +++ b/yjit/src/asm/arm64/inst/halfword_imm.rs @@ -1,3 +1,5 @@ +use super::super::arg::truncate_imm; + /// Whether this is a load or a store. enum Op { Load = 1, @@ -95,11 +97,12 @@ impl From<HalfwordImm> for u32 { fn from(inst: HalfwordImm) -> Self { let (mut opc, imm) = match inst.index { Index::None => { - let mut imm12 = ((inst.imm / 2) as u32) & ((1 << 12) - 1); + assert_eq!(inst.imm & 1, 0, "immediate offset must be even"); + let imm12 = truncate_imm::<_, 12>(inst.imm / 2); (0b100, imm12) }, Index::PreIndex | Index::PostIndex => { - let mut imm9 = (inst.imm as u32) & ((1 << 9) - 1); + let imm9 = truncate_imm::<_, 9>(inst.imm); (0b000, (imm9 << 2) | (inst.index as u32)) } }; |