On a 64-bit host, discard any replications of the 32-bit sign bit when performing the shift and merge.
Fixes: https://bugs.launchpad.net/bugs/1834496 Tested-by: Christophe Lyon <christophe.l...@linaro.org> Tested-by: Alex Bennée <alex.ben...@linaro.org> Reviewed-by: Alex Bennée <alex.ben...@linaro.org> Signed-off-by: Richard Henderson <richard.hender...@linaro.org> --- tcg/optimize.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index d7c71a6085..d2424de4af 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -1213,8 +1213,8 @@ void tcg_optimize(TCGContext *s) if (opc == INDEX_op_extract2_i64) { tmp = (v1 >> op->args[3]) | (v2 << (64 - op->args[3])); } else { - tmp = (v1 >> op->args[3]) | (v2 << (32 - op->args[3])); - tmp = (int32_t)tmp; + tmp = (int32_t)(((uint32_t)v1 >> op->args[3]) | + ((uint32_t)v2 << (32 - op->args[3]))); } tcg_opt_gen_movi(s, op, op->args[0], tmp); break; -- 2.17.1
