From: Xi Ruoyao <xry111@xry111.site>
To: gcc-patches@gcc.gnu.org
Cc: Lulu Cheng <chenglulu@loongson.cn>, Wang Xuerui <i@xen0n.name>,
Chenghua Xu <xuchenghua@loongson.cn>,
Xiaolin Tang <tangxiaolin@loongson.cn>,
Xi Ruoyao <xry111@xry111.site>
Subject: [PATCH] LoongArch: Add fcopysign instructions
Date: Fri, 4 Nov 2022 22:37:19 +0800 [thread overview]
Message-ID: <20221104143719.1709284-1-xry111@xry111.site> (raw)
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.
---
Bootstrapped and regtested on loongarch64-linux-gnu. Ok for trunk?
gcc/config/loongarch/loongarch.md | 22 ++++++++++++++++++-
.../gcc.target/loongarch/fcopysign.c | 16 ++++++++++++++
2 files changed, 37 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.target/loongarch/fcopysign.c
diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
index 214b14bddd3..042e6e74491 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -37,6 +37,7 @@ (define_c_enum "unspec" [
UNSPEC_FCLASS
UNSPEC_FMAX
UNSPEC_FMIN
+ UNSPEC_FCOPYSIGN
;; Override return address for exception handling.
UNSPEC_EH_RETURN
@@ -214,6 +215,7 @@ (define_attr "qword_mode" "no,yes"
;; 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 @@ (define_attr "type"
"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 @@ (define_insn "abs<mode>2"
(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))]
+ ""
+ "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);
+}
--
2.38.1
next reply other threads:[~2022-11-04 14:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-04 14:37 Xi Ruoyao [this message]
2022-11-06 1:57 ` Lulu Cheng
2022-11-06 2:23 ` Xi Ruoyao
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20221104143719.1709284-1-xry111@xry111.site \
--to=xry111@xry111.site \
--cc=chenglulu@loongson.cn \
--cc=gcc-patches@gcc.gnu.org \
--cc=i@xen0n.name \
--cc=tangxiaolin@loongson.cn \
--cc=xuchenghua@loongson.cn \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).