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[PULL 55/56] tcg/optimize: Propagate sign info for bit counting
From: |
Richard Henderson |
Subject: |
[PULL 55/56] tcg/optimize: Propagate sign info for bit counting |
Date: |
Wed, 27 Oct 2021 19:41:30 -0700 |
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>
---
tcg/optimize.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 5fa4d7285d..c0eccc61d6 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;
}
--
2.25.1
- [PULL 37/56] tcg/optimize: Split out fold_xi_to_i, (continued)
- [PULL 37/56] tcg/optimize: Split out fold_xi_to_i, Richard Henderson, 2021/10/27
- [PULL 40/56] tcg/optimize: Split out fold_sub_to_neg, Richard Henderson, 2021/10/27
- [PULL 41/56] tcg/optimize: Split out fold_xi_to_x, Richard Henderson, 2021/10/27
- [PULL 46/56] tcg/optimize: Sink commutative operand swapping into fold functions, Richard Henderson, 2021/10/27
- [PULL 42/56] tcg/optimize: Split out fold_ix_to_i, Richard Henderson, 2021/10/27
- [PULL 48/56] tcg/optimize: Use fold_xx_to_i for orc, Richard Henderson, 2021/10/27
- [PULL 44/56] tcg/optimize: Expand fold_mulu2_i32 to all 4-arg multiplies, Richard Henderson, 2021/10/27
- [PULL 45/56] tcg/optimize: Expand fold_addsub2_i32 to 64-bit ops, Richard Henderson, 2021/10/27
- [PULL 47/56] tcg/optimize: Stop forcing z_mask to "garbage" for 32-bit values, Richard Henderson, 2021/10/27
- [PULL 50/56] tcg/optimize: Use fold_xi_to_x for div, Richard Henderson, 2021/10/27
- [PULL 55/56] tcg/optimize: Propagate sign info for bit counting,
Richard Henderson <=
- [PULL 56/56] tcg/optimize: Propagate sign info for shifting, Richard Henderson, 2021/10/27
- [PULL 43/56] tcg/optimize: Split out fold_masks, Richard Henderson, 2021/10/27
- [PULL 51/56] tcg/optimize: Use fold_xx_to_i for rem, Richard Henderson, 2021/10/27
- [PULL 49/56] tcg/optimize: Use fold_xi_to_x for mul, Richard Henderson, 2021/10/27
- [PULL 52/56] tcg/optimize: Optimize sign extensions, Richard Henderson, 2021/10/27
- [PULL 54/56] tcg/optimize: Propagate sign info for setcond, Richard Henderson, 2021/10/27
- [PULL 53/56] tcg/optimize: Propagate sign info for logical operations, Richard Henderson, 2021/10/27
- Re: [PULL 00/56] tcg patch queue, Richard Henderson, 2021/10/28