@@ -578,6 +578,16 @@ static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd,
type = TCG_TYPE_I32;
}
+ /* Speed things up by handling the common case of small positive
+ and negative values specially. */
+ if ((value & ~0xffffull) == 0) {
+ tcg_out_insn(s, 3405, MOVZ, type, rd, value, 0);
+ return;
+ } else if ((ivalue & ~0xffffull) == 0) {
+ tcg_out_insn(s, 3405, MOVN, type, rd, ivalue, 0);
+ return;
+ }
+
/* Check for bitfield immediates. For the benefit of 32-bit quantities,
use the sign-extended value. That lets us match rotated values such
as 0xff0000ff with the same 64-bit logic matching 0xffffffffff0000ff. */