Bug fix for handling vcvt.f64.s32 instructions.
The source register should be decoded with getDReg().
Change-Id: I57835ebac1e1deb79428b15475db8762c7ba99b5
diff --git a/main/VEX/priv/guest_arm_toIR.c b/main/VEX/priv/guest_arm_toIR.c
index 5397d76..220c50f 100644
--- a/main/VEX/priv/guest_arm_toIR.c
+++ b/main/VEX/priv/guest_arm_toIR.c
@@ -12365,7 +12365,22 @@
IRTemp rmode = newTemp(Ity_I32);
assign(rmode, mkU32(Irrm_NEAREST)); // rmode that this insn is defd to use
IRTemp src32 = newTemp(Ity_I32);
- assign(src32, unop(Iop_ReinterpF32asI32, getFReg(d)));
+ if (dp_op == 0) {
+ assign(src32, unop(Iop_ReinterpF32asI32, getFReg(d)));
+ } else {
+ /* Example code sequence of using vcvt.f64.s32. The s32 value is
+ initialized in s14 but loaded via d7 (s14 is the low half of
+ d7), so we need to decode the register using getDReg instead of
+ getFReg. Since the conversion size is from s32 to f64, we also
+ need to explicitly extract the low half of i64 here.
+
+ 81a0: ee07 2a10 vmov s14, r2
+ 81a4: eeba 7bef vcvt.f64.s32 d7, d7, #1
+ */
+ IRTemp src64 = newTemp(Ity_I64);
+ assign(src64, unop(Iop_ReinterpF64asI64, getDReg(d)));
+ assign(src32, unop(Iop_64to32, mkexpr(src64)));
+ }
IRExpr* as_F64 = unop( unsyned ? Iop_I32UtoF64 : Iop_I32StoF64,
mkexpr(src32 ) );
IRTemp scale = newTemp(Ity_F64);
