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[Qemu-devel] [PATCH v4 02/64] tcg: Minor adjustments to deposit expander
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH v4 02/64] tcg: Minor adjustments to deposit expanders |
Date: |
Wed, 23 Nov 2016 14:00:59 +0100 |
Assert that len is not 0.
Since we have asserted that ofs + len <= N, a later
check for len == N implies that ofs == 0.
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/tcg-op.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index c185b9c..b17f03f 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -533,10 +533,11 @@ void tcg_gen_deposit_i32(TCGv_i32 ret, TCGv_i32 arg1,
TCGv_i32 arg2,
TCGv_i32 t1;
tcg_debug_assert(ofs < 32);
+ tcg_debug_assert(len > 0);
tcg_debug_assert(len <= 32);
tcg_debug_assert(ofs + len <= 32);
- if (ofs == 0 && len == 32) {
+ if (len == 32) {
tcg_gen_mov_i32(ret, arg2);
return;
}
@@ -1718,10 +1719,11 @@ void tcg_gen_deposit_i64(TCGv_i64 ret, TCGv_i64 arg1,
TCGv_i64 arg2,
TCGv_i64 t1;
tcg_debug_assert(ofs < 64);
+ tcg_debug_assert(len > 0);
tcg_debug_assert(len <= 64);
tcg_debug_assert(ofs + len <= 64);
- if (ofs == 0 && len == 64) {
+ if (len == 64) {
tcg_gen_mov_i64(ret, arg2);
return;
}
--
2.7.4
- [Qemu-devel] [PATCH v4 00/64] tcg 2.9 patch queue, Richard Henderson, 2016/11/23
- [Qemu-devel] [PATCH v4 01/64] tcg: Add field extraction primitives, Richard Henderson, 2016/11/23
- [Qemu-devel] [PATCH v4 02/64] tcg: Minor adjustments to deposit expanders,
Richard Henderson <=
- [Qemu-devel] [PATCH v4 04/64] tcg/aarch64: Implement field extraction opcodes, Richard Henderson, 2016/11/23
- [Qemu-devel] [PATCH v4 03/64] tcg: Add deposit_z expander, Richard Henderson, 2016/11/23
- [Qemu-devel] [PATCH v4 05/64] tcg/arm: Move isa detection to tcg-target.h, Richard Henderson, 2016/11/23
- [Qemu-devel] [PATCH v4 08/64] tcg/mips: Implement field extraction opcodes, Richard Henderson, 2016/11/23
- [Qemu-devel] [PATCH v4 06/64] tcg/arm: Implement field extraction opcodes, Richard Henderson, 2016/11/23
- [Qemu-devel] [PATCH v4 07/64] tcg/i386: Implement field extraction opcodes, Richard Henderson, 2016/11/23
- [Qemu-devel] [PATCH v4 09/64] tcg/ppc: Implement field extraction opcodes, Richard Henderson, 2016/11/23
- [Qemu-devel] [PATCH v4 11/64] tcg/s390: Implement field extraction opcodes, Richard Henderson, 2016/11/23