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[Qemu-devel] [PULL 01/11] tcg-s390: Fix off-by-one in wraparound andi
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL 01/11] tcg-s390: Fix off-by-one in wraparound andi |
Date: |
Thu, 15 May 2014 09:39:33 -0700 |
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/s390/tcg-target.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c
index ebdd074..0f972ae 100644
--- a/tcg/s390/tcg-target.c
+++ b/tcg/s390/tcg-target.c
@@ -983,8 +983,8 @@ static void tgen_andi(TCGContext *s, TCGType type, TCGReg
dest, uint64_t val)
int msb, lsb;
if ((val & 0x8000000000000001ull) == 0x8000000000000001ull) {
/* Achieve wraparound by swapping msb and lsb. */
- msb = 63 - ctz64(~val);
- lsb = clz64(~val) + 1;
+ msb = 64 - ctz64(~val);
+ lsb = clz64(~val) - 1;
} else {
msb = clz64(val);
lsb = 63 - ctz64(val);
--
1.9.0
- [Qemu-devel] [PULL 00/12] tcg s390 updates, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 01/11] tcg-s390: Fix off-by-one in wraparound andi,
Richard Henderson <=
- [Qemu-devel] [PULL 02/11] tcg-s390: Convert to TCGMemOp, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 03/11] tcg-s390: Integrate endianness into TCGMemOp, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 04/11] tcg-s390: Convert to new ldst opcodes, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 05/11] tcg-s390: Move ldst helpers out of line, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 06/11] tcg-s390: Use more risbg in the tlb sequence, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 07/11] tcg-s390: Implement tcg_register_jit, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 08/11] tcg-s390: Allow immediate operands to add2 and sub2, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 11/11] tcg-s390: Implement direct chaining of TBs, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 09/11] tcg-s390: Improve setcond, Richard Henderson, 2014/05/15
- [Qemu-devel] [PULL 10/11] tcg-s390: Don't force -march=z990, Richard Henderson, 2014/05/15