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Re: [Qemu-devel] [PATCH 4/5] tcg: Optimize movcond for constant comparis
From: |
Aurelien Jarno |
Subject: |
Re: [Qemu-devel] [PATCH 4/5] tcg: Optimize movcond for constant comparisons |
Date: |
Tue, 18 Sep 2012 23:11:48 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Tue, Sep 18, 2012 at 07:23:59AM -0700, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <address@hidden>
> ---
> tcg/optimize.c | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/tcg/optimize.c b/tcg/optimize.c
> index fba0ed9..5b0a8ce 100644
> --- a/tcg/optimize.c
> +++ b/tcg/optimize.c
> @@ -397,6 +397,14 @@ static TCGArg *tcg_constant_folding(TCGContext *s,
> uint16_t *tcg_opc_ptr,
> args[3] = tcg_swap_cond(args[3]);
> }
> break;
> + CASE_OP_32_64(movcond):
> + if (temps[args[1]].state == TCG_TEMP_CONST
> + && temps[args[2]].state != TCG_TEMP_CONST) {
> + tmp = args[1];
> + args[1] = args[2];
> + args[2] = tmp;
> + args[5] = tcg_swap_cond(args[5]);
> + }
> default:
> break;
> }
> @@ -617,6 +625,27 @@ static TCGArg *tcg_constant_folding(TCGContext *s,
> uint16_t *tcg_opc_ptr,
> }
> args += 4;
> break;
> + CASE_OP_33_64(movcond):
> + if (temps[args[1]].state == TCG_TEMP_CONST
> + && temps[args[2]].state == TCG_TEMP_CONST) {
> + gen_opc_buf[op_index] = op_to_mov(op);
> + tmp = do_constant_folding_cond(op, temps[args[1]].val,
> + temps[args[2]].val, args[5]);
> + tcg_opt_gen_mov(s, gen_args, args[0], args[4-tmp],
> + nb_temps, nb_globals);
> + gen_args += 2;
> + } else {
> + reset_temp(args[0], nb_temps, nb_globals);
> + 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];
> + gen_args += 6;
> + }
> + args += 6;
> + break;
> case INDEX_op_call:
> nb_call_args = (args[0] >> 16) + (args[0] & 0xffff);
> if (!(args[nb_call_args + 1] & (TCG_CALL_CONST |
> TCG_CALL_PURE))) {
> --
> 1.7.11.4
>
Reviewed-by: Aurelien Jarno <address@hidden>
--
Aurelien Jarno GPG: 1024D/F1BCDB73
address@hidden http://www.aurel32.net
[Qemu-devel] [PATCH 3/5] tcg-i386: Implement movcond, Richard Henderson, 2012/09/18
[Qemu-devel] [PATCH 2/5] target-alpha: Use movcond, Richard Henderson, 2012/09/18
[Qemu-devel] [PATCH 1/5] tcg: Introduce movcond, Richard Henderson, 2012/09/18