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[Qemu-devel] [PULL 04/29] tcg: Constant fold div, rem
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL 04/29] tcg: Constant fold div, rem |
Date: |
Mon, 2 Sep 2013 09:28:49 -0700 |
Reviewed-by: Aurelien Jarno <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/optimize.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index e8dedf3..b29bf25 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -304,6 +304,25 @@ static TCGArg do_constant_folding_2(TCGOpcode op, TCGArg
x, TCGArg y)
muls64(&l64, &h64, x, y);
return h64;
+ case INDEX_op_div_i32:
+ /* Avoid crashing on divide by zero, otherwise undefined. */
+ return (int32_t)x / ((int32_t)y ? : 1);
+ case INDEX_op_divu_i32:
+ return (uint32_t)x / ((uint32_t)y ? : 1);
+ case INDEX_op_div_i64:
+ return (int64_t)x / ((int64_t)y ? : 1);
+ case INDEX_op_divu_i64:
+ return (uint64_t)x / ((uint64_t)y ? : 1);
+
+ case INDEX_op_rem_i32:
+ return (int32_t)x % ((int32_t)y ? : 1);
+ case INDEX_op_remu_i32:
+ return (uint32_t)x % ((uint32_t)y ? : 1);
+ case INDEX_op_rem_i64:
+ return (int64_t)x % ((int64_t)y ? : 1);
+ case INDEX_op_remu_i64:
+ return (uint64_t)x % ((uint64_t)y ? : 1);
+
default:
fprintf(stderr,
"Unrecognized operation %d in do_constant_folding.\n", op);
@@ -902,6 +921,10 @@ static TCGArg *tcg_constant_folding(TCGContext *s,
uint16_t *tcg_opc_ptr,
CASE_OP_32_64(nor):
CASE_OP_32_64(muluh):
CASE_OP_32_64(mulsh):
+ CASE_OP_32_64(div):
+ CASE_OP_32_64(divu):
+ CASE_OP_32_64(rem):
+ CASE_OP_32_64(remu):
if (temps[args[1]].state == TCG_TEMP_CONST
&& temps[args[2]].state == TCG_TEMP_CONST) {
s->gen_opc_buf[op_index] = op_to_movi(op);
--
1.8.1.4
- [Qemu-devel] [PULL 00/29] Three tcg patch sets, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 01/29] tcg: Add muluh and mulsh opcodes, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 02/29] tcg-mips: Implement mulsh, muluh, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 03/29] tcg-ppc64: Implement muluh, mulsh, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 04/29] tcg: Constant fold div, rem,
Richard Henderson <=
- [Qemu-devel] [PULL 05/29] qtest: Fix FMT_timeval vs time_t, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 06/29] tcg: Change flush_icache_range arguments to uintptr_t, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 07/29] tcg: Change tcg_qemu_tb_exec return to uintptr_t, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 08/29] tcg: Fix next_tb type in cpu_exec, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 09/29] tcg: Allow TCG_TARGET_REG_BITS to be specified independantly, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 10/29] tcg: Define TCG_TYPE_PTR properly, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 11/29] tcg: Define TCG_ptr properly, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 12/29] tcg: Change frame pointer offsets to intptr_t, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 13/29] tcg: Change memory offsets to intptr_t, Richard Henderson, 2013/09/02
- [Qemu-devel] [PULL 14/29] tcg: Change relocation offsets to intptr_t, Richard Henderson, 2013/09/02