[v2] tcg: Simplify calls to load/store helpers

[PATCH v2 10/54] tcg/loongarch64: Conditionalize tcg_out_exts_i32_i64

Richard Henderson posted 54 patches 2 years, 10 months ago

Diff against v1 v3 v4 v5
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Maintainers: Richard Henderson <richard.henderson@linaro.org>, Paolo Bonzini <pbonzini@redhat.com>, Eduardo Habkost <eduardo@habkost.net>, David Hildenbrand <david@redhat.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Thomas Huth <thuth@redhat.com>, WANG Xuerui <git@xen0n.name>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Aurelien Jarno <aurelien@aurel32.net>, Huacai Chen <chenhuacai@kernel.org>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <Alistair.Francis@wdc.com>, Stefan Weil <sw@weilnetz.de>

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[PATCH v2 10/54] tcg/loongarch64: Conditionalize tcg_out_exts_i32_i64

Posted by Richard Henderson 2 years, 10 months ago

Since TCG_TYPE_I32 values are kept sign-extended in registers,
via ".w" instructions, we need not extend if the register matches.
This is already relied upon by comparisons.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/loongarch64/tcg-target.c.inc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tcg/loongarch64/tcg-target.c.inc b/tcg/loongarch64/tcg-target.c.inc
index 989632e08a..b2146988be 100644
--- a/tcg/loongarch64/tcg-target.c.inc
+++ b/tcg/loongarch64/tcg-target.c.inc
@@ -458,7 +458,9 @@ static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg)
 
 static void tcg_out_exts_i32_i64(TCGContext *s, TCGReg ret, TCGReg arg)
 {
-    tcg_out_ext32s(s, ret, arg);
+    if (ret != arg) {
+        tcg_out_ext32s(s, ret, arg);
+    }
 }
 
 static void tcg_out_clzctz(TCGContext *s, LoongArchInsn opc,
-- 
2.34.1