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tcg/aarch64: Fix illegal insn from out-of-range shli 

The masking in tcg_out_shl was incorrect, producing an
illegal instruction, rather than merely unspecified results
for the out-of-range shift.

Tested-by: Joel Stanley <joel@jms.id.au>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1051
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-06-02 01:04:30 +00:00
parent 3cc18d18cc
commit 94bcc91b2e
1 changed files with 1 additions and 1 deletions
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2
tcg/aarch64/tcg-target.c.inc
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@ -1261,7 +1261,7 @@ static inline void tcg_out_shl(TCGContext *s, TCGType ext,
{
int bits = ext ? 64 : 32;
int max = bits - 1;
tcg_out_ubfm(s, ext, rd, rn, bits - (m & max), max - (m & max));
tcg_out_ubfm(s, ext, rd, rn, (bits - m) & max, (max - m) & max);
}
static inline void tcg_out_shr(TCGContext *s, TCGType ext,