For LT/GE vs zero, shift down the sign bit.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
}
return;
+ case TCG_COND_GE:
+ inv = true;
+ /* fall through */
+ case TCG_COND_LT:
+ /* If arg2 is 0, extract the sign bit. */
+ if (const_arg2 && arg2 == 0) {
+ tcg_out_mov(s, rexw ? TCG_TYPE_I64 : TCG_TYPE_I32, dest, arg1);
+ if (inv) {
+ tcg_out_modrm(s, OPC_GRP3_Ev + rexw, EXT3_NOT, dest);
+ }
+ tcg_out_shifti(s, SHIFT_SHR + rexw, dest, rexw ? 63 : 31);
+ return;
+ }
+ break;
+
default:
break;
}