From 04edfbcf025b5588e0f3b86c74356a4339745f35 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Fri, 21 Sep 2012 11:07:29 +0200 Subject: [PATCH] tcg/optimize: add constant folding for deposit Reviewed-by: Richard Henderson Signed-off-by: Aurelien Jarno Signed-off-by: Michael Roth --- tcg/optimize.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/tcg/optimize.c b/tcg/optimize.c index c8ae50b..35532a1 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -668,6 +668,26 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, } args += 3; break; + CASE_OP_32_64(deposit): + if (temps[args[1]].state == TCG_TEMP_CONST + && temps[args[2]].state == TCG_TEMP_CONST) { + gen_opc_buf[op_index] = op_to_movi(op); + tmp = ((1ull << args[4]) - 1); + tmp = (temps[args[1]].val & ~(tmp << args[3])) + | ((temps[args[2]].val & tmp) << args[3]); + tcg_opt_gen_movi(gen_args, args[0], tmp); + gen_args += 2; + } else { + reset_temp(args[0]); + gen_args[0] = args[0]; + gen_args[1] = args[1]; + gen_args[2] = args[2]; + gen_args[3] = args[3]; + gen_args[4] = args[4]; + gen_args += 5; + } + args += 5; + break; CASE_OP_32_64(setcond): tmp = do_constant_folding_cond(op, args[1], args[2], args[3]); if (tmp != 2) { -- 1.7.12.1