70 lines
2.0 KiB
Diff
70 lines
2.0 KiB
Diff
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From 8da6a317bc3ad64da8590649b83a841391f20438 Mon Sep 17 00:00:00 2001
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From: Xi Ruoyao <xry111@xry111.site>
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Date: Sun, 17 Dec 2023 04:26:23 +0800
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Subject: [PATCH 084/188] LoongArch: Add sign_extend pattern for 32-bit rotate
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shift
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Remove a redundant sign extension.
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gcc/ChangeLog:
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* config/loongarch/loongarch.md (rotrsi3_extend): New
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define_insn.
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gcc/testsuite/ChangeLog:
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* gcc.target/loongarch/rotrw.c: New test.
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---
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gcc/config/loongarch/loongarch.md | 10 ++++++++++
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gcc/testsuite/gcc.target/loongarch/rotrw.c | 17 +++++++++++++++++
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2 files changed, 27 insertions(+)
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create mode 100644 gcc/testsuite/gcc.target/loongarch/rotrw.c
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diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
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index 6cf71d9e4..44e8d336a 100644
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--- a/gcc/config/loongarch/loongarch.md
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+++ b/gcc/config/loongarch/loongarch.md
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@@ -2893,6 +2893,16 @@
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[(set_attr "type" "shift,shift")
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(set_attr "mode" "<MODE>")])
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+(define_insn "rotrsi3_extend"
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+ [(set (match_operand:DI 0 "register_operand" "=r,r")
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+ (sign_extend:DI
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+ (rotatert:SI (match_operand:SI 1 "register_operand" "r,r")
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+ (match_operand:SI 2 "arith_operand" "r,I"))))]
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+ "TARGET_64BIT"
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+ "rotr%i2.w\t%0,%1,%2"
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+ [(set_attr "type" "shift,shift")
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+ (set_attr "mode" "SI")])
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+
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;; The following templates were added to generate "bstrpick.d + alsl.d"
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;; instruction pairs.
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;; It is required that the values of const_immalsl_operand and
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diff --git a/gcc/testsuite/gcc.target/loongarch/rotrw.c b/gcc/testsuite/gcc.target/loongarch/rotrw.c
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new file mode 100644
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index 000000000..6ed45e8b8
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/loongarch/rotrw.c
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@@ -0,0 +1,17 @@
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+/* { dg-do compile } */
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+/* { dg-options "-O2" } */
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+/* { dg-final { scan-assembler "rotr\\.w\t\\\$r4,\\\$r4,\\\$r5" } } */
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+/* { dg-final { scan-assembler "rotri\\.w\t\\\$r4,\\\$r4,5" } } */
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+/* { dg-final { scan-assembler-not "slli\\.w" } } */
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+
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+unsigned
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+rotr (unsigned a, unsigned b)
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+{
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+ return a >> b | a << 32 - b;
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+}
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+
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+unsigned
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+rotri (unsigned a)
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+{
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+ return a >> 5 | a << 27;
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+}
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--
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2.43.0
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