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* [gcc r13-3702] LoongArch: Add fcopysign instructions
@ 2022-11-06 8:03 Xi Ruoyao
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From: Xi Ruoyao @ 2022-11-06 8:03 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:3628025ac604cf76a3fa30ffcc5899f01d3ffee4
commit r13-3702-g3628025ac604cf76a3fa30ffcc5899f01d3ffee4
Author: Xi Ruoyao <xry111@xry111.site>
Date: Fri Nov 4 15:12:22 2022 +0800
LoongArch: Add fcopysign instructions
Add fcopysign.{s,d} with the names copysign{sf,df}3 so GCC will expand
__builtin_copysign{f,} to a single instruction.
Link: https://sourceware.org/pipermail/libc-alpha/2022-November/143177.html
gcc/ChangeLog:
* config/loongarch/loongarch.md (UNSPEC_FCOPYSIGN): New unspec.
(type): Add fcopysign.
(copysign<mode>3): New instruction template.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/fcopysign.c: New test.
Diff:
---
gcc/config/loongarch/loongarch.md | 22 +++++++++++++++++++++-
gcc/testsuite/gcc.target/loongarch/fcopysign.c | 16 ++++++++++++++++
2 files changed, 37 insertions(+), 1 deletion(-)
diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
index 214b14bddd3..bda34d0f3db 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -37,6 +37,7 @@
UNSPEC_FCLASS
UNSPEC_FMAX
UNSPEC_FMIN
+ UNSPEC_FCOPYSIGN
;; Override return address for exception handling.
UNSPEC_EH_RETURN
@@ -214,6 +215,7 @@
;; fabs floating point absolute value
;; fneg floating point negation
;; fcmp floating point compare
+;; fcopysign floating point copysign
;; fcvt floating point convert
;; fsqrt floating point square root
;; frsqrt floating point reciprocal square root
@@ -226,7 +228,7 @@
"unknown,branch,jump,call,load,fpload,fpidxload,store,fpstore,fpidxstore,
prefetch,prefetchx,condmove,mgtf,mftg,const,arith,logical,
shift,slt,signext,clz,trap,imul,idiv,move,
- fmove,fadd,fmul,fmadd,fdiv,frdiv,fabs,fneg,fcmp,fcvt,fsqrt,
+ fmove,fadd,fmul,fmadd,fdiv,frdiv,fabs,fneg,fcmp,fcopysign,fcvt,fsqrt,
frsqrt,accext,accmod,multi,atomic,syncloop,nop,ghost"
(cond [(eq_attr "jirl" "!unset") (const_string "call")
(eq_attr "got" "load") (const_string "load")
@@ -976,6 +978,24 @@
(set_attr "mode" "<UNITMODE>")])
\f
;;
+;; ....................
+;;
+;; FLOATING POINT COPYSIGN
+;;
+;; ....................
+
+(define_insn "copysign<mode>3"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (unspec:ANYF [(match_operand:ANYF 1 "register_operand" "f")
+ (match_operand:ANYF 2 "register_operand" "f")]
+ UNSPEC_FCOPYSIGN))]
+ "TARGET_HARD_FLOAT"
+ "fcopysign.<fmt>\t%0,%1,%2"
+ [(set_attr "type" "fcopysign")
+ (set_attr "mode" "<UNITMODE>")])
+
+\f
+;;
;; ...................
;;
;; Count leading zeroes.
diff --git a/gcc/testsuite/gcc.target/loongarch/fcopysign.c b/gcc/testsuite/gcc.target/loongarch/fcopysign.c
new file mode 100644
index 00000000000..058ba2cf573
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/fcopysign.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-mdouble-float" } */
+/* { dg-final { scan-assembler "fcopysign\\.s" } } */
+/* { dg-final { scan-assembler "fcopysign\\.d" } } */
+
+double
+my_copysign (double a, double b)
+{
+ return __builtin_copysign (a, b);
+}
+
+float
+my_copysignf (float a, float b)
+{
+ return __builtin_copysignf (a, b);
+}
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