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[Qemu-devel] [PATCH v2 10/10] tcg/optimize: add constant folding for dep
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH v2 10/10] tcg/optimize: add constant folding for deposit |
Date: |
Fri, 21 Sep 2012 21:43:18 +0200 |
Signed-off-by: Aurelien Jarno <address@hidden>
---
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) {
--
1.7.10.4
- [Qemu-devel] [PATCH v2 00/10] tcg/optimize: rework copy propagation, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH v2 06/10] tcg/optimize: optimize "op r, a, a => movi r, 0", Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH v2 08/10] tcg/optimize: prefer the "op a, a, b" form for commutative ops, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH v2 01/10] tcg/optimize: remove TCG_TEMP_ANY, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH v2 10/10] tcg/optimize: add constant folding for deposit,
Aurelien Jarno <=
- [Qemu-devel] [PATCH v2 02/10] tcg/optimize: check types in copy propagation, Aurelien Jarno, 2012/09/21
- [Qemu-devel] [PATCH v2 07/10] tcg/optimize: further optimize brcond/movcond/setcond, Aurelien Jarno, 2012/09/21
[Qemu-devel] [PATCH v2 09/10] tcg: remove #ifdef #endif around TCGOpcode tests, Aurelien Jarno, 2012/09/21