[ARM64_DYNAREC] Make sure neg on 16bits is correctly computed

2024-11-27 00:30:32 +00:00 · 2024-10-29 15:19:38 +01:00 · 2024-10-29 15:19:38 +01:00 · 4a440b6f0a
commit 4a440b6f0a
parent fdfc5c4a41
1 changed files with 3 additions and 2 deletions
--- a/src/dynarec/arm64/dynarec_arm64_emit_math.c
+++ b/src/dynarec/arm64/dynarec_arm64_emit_math.c
@ -1726,10 +1726,11 @@ void emit_neg16(dynarec_arm_t* dyn, int ninst, int s1, int s3, int s4)
    IFX(X_AF|X_OF) {
        MOVw_REG(s3, s1);
    }
+    NEGw_REG(s1, s1);
    IFX(X_ZF) {
-        NEGSw_REG(s1, s1);
+        ANDSw_mask(s1, s1, 0, 15);  //mask=0xffff
    } else {
-        NEGw_REG(s1, s1);
+        ANDw_mask(s1, s1, 0, 15);   //mask=0xffff
    }
    IFX(X_PEND) {
        STRH_U12(s1, xEmu, offsetof(x64emu_t, res));