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| author | Peter Maydell <peter.maydell@linaro.org> | 2015-02-13 05:46:08 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2015-02-13 05:46:08 +0000 |
| commit | 1743d55c8b38bcee632cf6eb2de81131635bb3d2 (patch) | |
| tree | 1f506f206b5eda9625983e147ca7ca0ee48c92ac | |
| parent | 560739702764d4882662f0e70b584fa5dff7241a (diff) | |
target-arm: A64: Fix shifts into sign bit
Fix attempts to shift into the sign bit of an int, which is undefined
behaviour in C and warned about by the clang sanitizer.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1423233250-15853-2-git-send-email-peter.maydell@linaro.org
| -rw-r--r-- | target-arm/translate-a64.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index acf4b162bd..d3801c5282 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -1077,7 +1077,7 @@ static void disas_uncond_b_imm(DisasContext *s, uint32_t insn) { uint64_t addr = s->pc + sextract32(insn, 0, 26) * 4 - 4; - if (insn & (1 << 31)) { + if (insn & (1U << 31)) { /* C5.6.26 BL Branch with link */ tcg_gen_movi_i64(cpu_reg(s, 30), s->pc); } @@ -1271,7 +1271,7 @@ static void gen_get_nzcv(TCGv_i64 tcg_rt) TCGv_i32 nzcv = tcg_temp_new_i32(); /* build bit 31, N */ - tcg_gen_andi_i32(nzcv, cpu_NF, (1 << 31)); + tcg_gen_andi_i32(nzcv, cpu_NF, (1U << 31)); /* build bit 30, Z */ tcg_gen_setcondi_i32(TCG_COND_EQ, tmp, cpu_ZF, 0); tcg_gen_deposit_i32(nzcv, nzcv, tmp, 30, 1); @@ -1296,7 +1296,7 @@ static void gen_set_nzcv(TCGv_i64 tcg_rt) tcg_gen_trunc_i64_i32(nzcv, tcg_rt); /* bit 31, N */ - tcg_gen_andi_i32(cpu_NF, nzcv, (1 << 31)); + tcg_gen_andi_i32(cpu_NF, nzcv, (1U << 31)); /* bit 30, Z */ tcg_gen_andi_i32(cpu_ZF, nzcv, (1 << 30)); tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_ZF, cpu_ZF, 0); |