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author | Richard Henderson <richard.henderson@linaro.org> | 2021-08-26 13:24:17 -0700 |
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committer | Richard Henderson <richard.henderson@linaro.org> | 2021-10-28 20:55:07 -0700 |
commit | 2b9d0c59edec097c72ce9b917d3c08dc5d59cdda (patch) | |
tree | 62721df48e0dac5a71fd1d4b2c565c42d6e0072c | |
parent | 275d7d8e70ef8679e241ce78c83548067f403394 (diff) | |
download | qemu-2b9d0c59edec097c72ce9b917d3c08dc5d59cdda.zip qemu-2b9d0c59edec097c72ce9b917d3c08dc5d59cdda.tar.gz qemu-2b9d0c59edec097c72ce9b917d3c08dc5d59cdda.tar.bz2 |
tcg/optimize: Propagate sign info for bit counting
The results are generally 6 bit unsigned values, though
the count leading and trailing bits may produce any value
for a zero input.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
-rw-r--r-- | tcg/optimize.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index 5fa4d72..c0eccc6 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -1229,7 +1229,7 @@ static bool fold_count_zeros(OptContext *ctx, TCGOp *op) g_assert_not_reached(); } ctx->z_mask = arg_info(op->args[2])->z_mask | z_mask; - + ctx->s_mask = smask_from_zmask(ctx->z_mask); return false; } @@ -1249,6 +1249,7 @@ static bool fold_ctpop(OptContext *ctx, TCGOp *op) default: g_assert_not_reached(); } + ctx->s_mask = smask_from_zmask(ctx->z_mask); return false; } |