108 lines
3.2 KiB
Diff
108 lines
3.2 KiB
Diff
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From 41a4945886631a1b2898ae957389d5db18a07141 Mon Sep 17 00:00:00 2001
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From: Xi Ruoyao <xry111@xry111.site>
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Date: Fri, 4 Nov 2022 15:12:22 +0800
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Subject: [PATCH 025/124] LoongArch: Add fcopysign instructions
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Add fcopysign.{s,d} with the names copysign{sf,df}3 so GCC will expand
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__builtin_copysign{f,} to a single instruction.
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Link: https://sourceware.org/pipermail/libc-alpha/2022-November/143177.html
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gcc/ChangeLog:
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* config/loongarch/loongarch.md (UNSPEC_FCOPYSIGN): New unspec.
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(type): Add fcopysign.
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(copysign<mode>3): New instruction template.
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gcc/testsuite/ChangeLog:
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* gcc.target/loongarch/fcopysign.c: New test.
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Signed-off-by: Peng Fan <fanpeng@loongson.cn>
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Signed-off-by: ticat_fp <fanpeng@loongson.cn>
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---
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gcc/config/loongarch/loongarch.md | 22 ++++++++++++++++++-
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.../gcc.target/loongarch/fcopysign.c | 16 ++++++++++++++
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2 files changed, 37 insertions(+), 1 deletion(-)
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create mode 100644 gcc/testsuite/gcc.target/loongarch/fcopysign.c
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diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
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index 214b14bdd..bda34d0f3 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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@@ -37,6 +37,7 @@
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UNSPEC_FCLASS
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UNSPEC_FMAX
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UNSPEC_FMIN
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+ UNSPEC_FCOPYSIGN
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;; Override return address for exception handling.
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UNSPEC_EH_RETURN
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@@ -214,6 +215,7 @@
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;; fabs floating point absolute value
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;; fneg floating point negation
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;; fcmp floating point compare
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+;; fcopysign floating point copysign
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;; fcvt floating point convert
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;; fsqrt floating point square root
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;; frsqrt floating point reciprocal square root
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@@ -226,7 +228,7 @@
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"unknown,branch,jump,call,load,fpload,fpidxload,store,fpstore,fpidxstore,
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prefetch,prefetchx,condmove,mgtf,mftg,const,arith,logical,
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shift,slt,signext,clz,trap,imul,idiv,move,
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- fmove,fadd,fmul,fmadd,fdiv,frdiv,fabs,fneg,fcmp,fcvt,fsqrt,
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+ fmove,fadd,fmul,fmadd,fdiv,frdiv,fabs,fneg,fcmp,fcopysign,fcvt,fsqrt,
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frsqrt,accext,accmod,multi,atomic,syncloop,nop,ghost"
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(cond [(eq_attr "jirl" "!unset") (const_string "call")
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(eq_attr "got" "load") (const_string "load")
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@@ -976,6 +978,24 @@
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(set_attr "mode" "<UNITMODE>")])
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;;
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+;; ....................
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+;;
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+;; FLOATING POINT COPYSIGN
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+;;
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+;; ....................
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+
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+(define_insn "copysign<mode>3"
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+ [(set (match_operand:ANYF 0 "register_operand" "=f")
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+ (unspec:ANYF [(match_operand:ANYF 1 "register_operand" "f")
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+ (match_operand:ANYF 2 "register_operand" "f")]
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+ UNSPEC_FCOPYSIGN))]
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+ "TARGET_HARD_FLOAT"
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+ "fcopysign.<fmt>\t%0,%1,%2"
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+ [(set_attr "type" "fcopysign")
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+ (set_attr "mode" "<UNITMODE>")])
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+
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+
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+;;
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;; ...................
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;;
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;; Count leading zeroes.
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diff --git a/gcc/testsuite/gcc.target/loongarch/fcopysign.c b/gcc/testsuite/gcc.target/loongarch/fcopysign.c
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new file mode 100644
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index 000000000..058ba2cf5
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/loongarch/fcopysign.c
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@@ -0,0 +1,16 @@
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+/* { dg-do compile } */
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+/* { dg-options "-mdouble-float" } */
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+/* { dg-final { scan-assembler "fcopysign\\.s" } } */
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+/* { dg-final { scan-assembler "fcopysign\\.d" } } */
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+
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+double
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+my_copysign (double a, double b)
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+{
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+ return __builtin_copysign (a, b);
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+}
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+
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+float
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+my_copysignf (float a, float b)
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+{
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+ return __builtin_copysignf (a, b);
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+}
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--
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2.33.0
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