On 10/21/21 23:05, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
> ---
> tcg/optimize.c | 39 ++++++++++++++++++++++-----------------
> 1 file changed, 22 insertions(+), 17 deletions(-)
> +static bool fold_extract2(OptContext *ctx, TCGOp *op)
> +{
> + if (arg_is_const(op->args[1]) && arg_is_const(op->args[2])) {
> + uint64_t v1 = arg_info(op->args[1])->val;
> + uint64_t v2 = arg_info(op->args[2])->val;
> + int shr = op->args[3];
> +
> + if (op->opc == INDEX_op_extract2_i64) {
> + v1 >>= shr;
> + v2 <<= 64 - shr;
> + } else {
> + v1 = (uint32_t)v1 >> shr;
> + v2 = (int32_t)v2 << (32 - shr);
Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org>
> + }
> + return tcg_opt_gen_movi(ctx, op, op->args[0], v1 | v2);
> + }
> + return false;
> +}
