unittests/ASM: Test lossy precision non-SVE path in Vector_F64ToI32

unittests/ASM/FEX_bugs/f64_to_i32_precision.asm

@@ -0,0 +1,21 @@
+%ifdef CONFIG
+{
+  "HostFeatures": ["AVX"],
+  "Env": { "FEX_HOSTFEATURES": "disablesve,disablefrintts" },
+  "RegData": {
+    "XMM0": ["0x297e3ce700000000", "0x0000000000000000", "0x0000000000000000", "0x0000000000000000"]
+  }
+}
+%endif
+
+; The non-SVE path in Vector_F64ToI32 (JIT/ConversionOps.cpp) had a precision issue:
+; Used to narrow the 64-bit float down to a 32-bit float before
+; converting to an integer, rather than converting directly to a 64-bit integer and
+; narrowing that to a 32-bit float.
+lea rdx, [rel .data]
+vcvttpd2dq xmm0, oword [rdx]
+hlt
+
+align 16
+.data:
+dq 0x8d482dd627d581f1, 0x41c4bf1e7380f30a