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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 31/56] tcg/optimize: Split out fold_count_zeros
Date: Wed, 27 Oct 2021 19:41:06 -0700
Message-Id: <20211028024131.1492790-32-richard.henderson@linaro.org>
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Cc: Luis Pires <luis.pires@eldorado.org.br>,
=?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <f4bug@amsat.org>
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Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/optimize.c | 32 ++++++++++++++++++--------------
1 file changed, 18 insertions(+), 14 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 2c57d08760..dd65f1afcd 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -873,6 +873,20 @@ static bool fold_call(OptContext *ctx, TCGOp *op)
return true;
}
=20
+static bool fold_count_zeros(OptContext *ctx, TCGOp *op)
+{
+ if (arg_is_const(op->args[1])) {
+ uint64_t t =3D arg_info(op->args[1])->val;
+
+ if (t !=3D 0) {
+ t =3D do_constant_folding(op->opc, t, 0);
+ return tcg_opt_gen_movi(ctx, op, op->args[0], t);
+ }
+ return tcg_opt_gen_mov(ctx, op, op->args[0], op->args[2]);
+ }
+ return false;
+}
+
static bool fold_ctpop(OptContext *ctx, TCGOp *op)
{
return fold_const1(ctx, op);
@@ -1739,20 +1753,6 @@ void tcg_optimize(TCGContext *s)
}
break;
=20
- CASE_OP_32_64(clz):
- CASE_OP_32_64(ctz):
- if (arg_is_const(op->args[1])) {
- TCGArg v =3D arg_info(op->args[1])->val;
- if (v !=3D 0) {
- tmp =3D do_constant_folding(opc, v, 0);
- tcg_opt_gen_movi(&ctx, op, op->args[0], tmp);
- } else {
- tcg_opt_gen_mov(&ctx, op, op->args[0], op->args[2]);
- }
- continue;
- }
- break;
-
default:
break;
=20
@@ -1777,6 +1777,10 @@ void tcg_optimize(TCGContext *s)
case INDEX_op_brcond2_i32:
done =3D fold_brcond2(&ctx, op);
break;
+ CASE_OP_32_64(clz):
+ CASE_OP_32_64(ctz):
+ done =3D fold_count_zeros(&ctx, op);
+ break;
CASE_OP_32_64(ctpop):
done =3D fold_ctpop(&ctx, op);
break;
--=20
2.25.1