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[Qemu-devel] [PATCH 4/5] tcg: Optimize movcond for constant comparisons
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 4/5] tcg: Optimize movcond for constant comparisons |
Date: |
Tue, 18 Sep 2012 07:23:59 -0700 |
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_32_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
[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