LoongArch: Replace UNSPEC_FCOPYSIGN with copysign RTL

When I added copysign support for LoongArch (r13-3702), we did not have
a copysign RTL insn, so I had to use UNSPEC to represent the copysign
instruction. Now the copysign RTX code has been added in r14-1586, so
this patch removes those UNSPECs, and it uses the native RTL copysign
insn.

Inspired by rs6000 patch "Cleanup: Replace UNSPEC_COPYSIGN with copysign
RTL" [1] from Michael Meissner.

[1]: https://gcc.gnu.org/pipermail/gcc-patches/2023-September/631701.html

gcc/ChangeLog:

	* config/loongarch/loongarch.md (UNSPEC_FCOPYSIGN): Delete.
	(copysign<mode>3): Use copysign RTL instead of UNSPEC.

diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
index 4fcb6d781d5ed05c7e7ee192a85743d49f461418..3286b0c56ae48555e0cadf90a2a4d37b5703ada3 100644 (file)
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -37,7 +37,6 @@
   UNSPEC_FCLASS
   UNSPEC_FMAX
   UNSPEC_FMIN
-  UNSPEC_FCOPYSIGN
   UNSPEC_FTINT
   UNSPEC_FTINTRM
   UNSPEC_FTINTRP
@@ -1129,9 +1128,8 @@
 
 (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))]
+       (copysign:ANYF (match_operand:ANYF 1 "register_operand" "f")
+                      (match_operand:ANYF 2 "register_operand" "f")))]
   "TARGET_HARD_FLOAT"
   "fcopysign.<fmt>\t%0,%1,%2"
   [(set_attr "type" "fcopysign")