LoongArch: Use standard pattern name and RTX code for LSX/LASX muh instructions

Removes unnecessary UNSPECs and make the muh instructions useful with
GNU vectors or auto vectorization.

gcc/ChangeLog:

	* config/loongarch/simd.md (muh): New code attribute mapping
	any_extend to smul_highpart or umul_highpart.
	(<su>mul<mode>3_highpart): New define_insn.
	* config/loongarch/lsx.md (UNSPEC_LSX_VMUH_S): Remove.
	(UNSPEC_LSX_VMUH_U): Remove.
	(lsx_vmuh_s_<lsxfmt>): Remove.
	(lsx_vmuh_u_<lsxfmt>): Remove.
	* config/loongarch/lasx.md (UNSPEC_LASX_XVMUH_S): Remove.
	(UNSPEC_LASX_XVMUH_U): Remove.
	(lasx_xvmuh_s_<lasxfmt>): Remove.
	(lasx_xvmuh_u_<lasxfmt>): Remove.
	* config/loongarch/loongarch-builtins.cc (CODE_FOR_lsx_vmuh_b):
	Redefine to standard pattern name.
	(CODE_FOR_lsx_vmuh_h): Likewise.
	(CODE_FOR_lsx_vmuh_w): Likewise.
	(CODE_FOR_lsx_vmuh_d): Likewise.
	(CODE_FOR_lsx_vmuh_bu): Likewise.
	(CODE_FOR_lsx_vmuh_hu): Likewise.
	(CODE_FOR_lsx_vmuh_wu): Likewise.
	(CODE_FOR_lsx_vmuh_du): Likewise.
	(CODE_FOR_lasx_xvmuh_b): Likewise.
	(CODE_FOR_lasx_xvmuh_h): Likewise.
	(CODE_FOR_lasx_xvmuh_w): Likewise.
	(CODE_FOR_lasx_xvmuh_d): Likewise.
	(CODE_FOR_lasx_xvmuh_bu): Likewise.
	(CODE_FOR_lasx_xvmuh_hu): Likewise.
	(CODE_FOR_lasx_xvmuh_wu): Likewise.
	(CODE_FOR_lasx_xvmuh_du): Likewise.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/vect-muh.c: New test.

5 files changed, 68 insertions, 60 deletions

diff --git a/gcc/config/loongarch/lasx.md b/gcc/config/loongarch/lasx.md
index d4a56c3..023a023 100644
--- a/gcc/config/loongarch/lasx.md
+++ b/gcc/config/loongarch/lasx.md
@@ -68,8 +68,6 @@
   UNSPEC_LASX_BRANCH
   UNSPEC_LASX_BRANCH_V
 
-  UNSPEC_LASX_XVMUH_S
-  UNSPEC_LASX_XVMUH_U
   UNSPEC_LASX_MXVEXTW_U
   UNSPEC_LASX_XVSLLWIL_S
   UNSPEC_LASX_XVSLLWIL_U
@@ -2823,26 +2821,6 @@
   [(set_attr "type" "simd_logic")
    (set_attr "mode" "<MODE>")])
 
-(define_insn "lasx_xvmuh_s_<lasxfmt>"
-  [(set (match_operand:ILASX 0 "register_operand" "=f")
-	(unspec:ILASX [(match_operand:ILASX 1 "register_operand" "f")
-		       (match_operand:ILASX 2 "register_operand" "f")]
-		      UNSPEC_LASX_XVMUH_S))]
-  "ISA_HAS_LASX"
-  "xvmuh.<lasxfmt>\t%u0,%u1,%u2"
-  [(set_attr "type" "simd_int_arith")
-   (set_attr "mode" "<MODE>")])
-
-(define_insn "lasx_xvmuh_u_<lasxfmt_u>"
-  [(set (match_operand:ILASX 0 "register_operand" "=f")
-	(unspec:ILASX [(match_operand:ILASX 1 "register_operand" "f")
-		       (match_operand:ILASX 2 "register_operand" "f")]
-		      UNSPEC_LASX_XVMUH_U))]
-  "ISA_HAS_LASX"
-  "xvmuh.<lasxfmt_u>\t%u0,%u1,%u2"
-  [(set_attr "type" "simd_int_arith")
-   (set_attr "mode" "<MODE>")])
-
 (define_insn "lasx_xvsllwil_s_<dlasxfmt>_<lasxfmt>"
   [(set (match_operand:<VDMODE256> 0 "register_operand" "=f")
 	(unspec:<VDMODE256> [(match_operand:ILASX_WHB 1 "register_operand" "f")
diff --git a/gcc/config/loongarch/loongarch-builtins.cc b/gcc/config/loongarch/loongarch-builtins.cc
index cbd833a..a6fcc1c 100644
--- a/gcc/config/loongarch/loongarch-builtins.cc
+++ b/gcc/config/loongarch/loongarch-builtins.cc
@@ -319,6 +319,14 @@ AVAIL_ALL (lasx, ISA_HAS_LASX)
 #define CODE_FOR_lsx_vmod_hu CODE_FOR_umodv8hi3
 #define CODE_FOR_lsx_vmod_wu CODE_FOR_umodv4si3
 #define CODE_FOR_lsx_vmod_du CODE_FOR_umodv2di3
+#define CODE_FOR_lsx_vmuh_b CODE_FOR_smulv16qi3_highpart
+#define CODE_FOR_lsx_vmuh_h CODE_FOR_smulv8hi3_highpart
+#define CODE_FOR_lsx_vmuh_w CODE_FOR_smulv4si3_highpart
+#define CODE_FOR_lsx_vmuh_d CODE_FOR_smulv2di3_highpart
+#define CODE_FOR_lsx_vmuh_bu CODE_FOR_umulv16qi3_highpart
+#define CODE_FOR_lsx_vmuh_hu CODE_FOR_umulv8hi3_highpart
+#define CODE_FOR_lsx_vmuh_wu CODE_FOR_umulv4si3_highpart
+#define CODE_FOR_lsx_vmuh_du CODE_FOR_umulv2di3_highpart
 #define CODE_FOR_lsx_vmul_b CODE_FOR_mulv16qi3
 #define CODE_FOR_lsx_vmul_h CODE_FOR_mulv8hi3
 #define CODE_FOR_lsx_vmul_w CODE_FOR_mulv4si3
@@ -439,14 +447,6 @@ AVAIL_ALL (lasx, ISA_HAS_LASX)
 #define CODE_FOR_lsx_vfnmsub_s CODE_FOR_vfnmsubv4sf4_nmsub4
 #define CODE_FOR_lsx_vfnmsub_d CODE_FOR_vfnmsubv2df4_nmsub4
 
-#define CODE_FOR_lsx_vmuh_b CODE_FOR_lsx_vmuh_s_b
-#define CODE_FOR_lsx_vmuh_h CODE_FOR_lsx_vmuh_s_h
-#define CODE_FOR_lsx_vmuh_w CODE_FOR_lsx_vmuh_s_w
-#define CODE_FOR_lsx_vmuh_d CODE_FOR_lsx_vmuh_s_d
-#define CODE_FOR_lsx_vmuh_bu CODE_FOR_lsx_vmuh_u_bu
-#define CODE_FOR_lsx_vmuh_hu CODE_FOR_lsx_vmuh_u_hu
-#define CODE_FOR_lsx_vmuh_wu CODE_FOR_lsx_vmuh_u_wu
-#define CODE_FOR_lsx_vmuh_du CODE_FOR_lsx_vmuh_u_du
 #define CODE_FOR_lsx_vsllwil_h_b CODE_FOR_lsx_vsllwil_s_h_b
 #define CODE_FOR_lsx_vsllwil_w_h CODE_FOR_lsx_vsllwil_s_w_h
 #define CODE_FOR_lsx_vsllwil_d_w CODE_FOR_lsx_vsllwil_s_d_w
@@ -588,6 +588,14 @@ AVAIL_ALL (lasx, ISA_HAS_LASX)
 #define CODE_FOR_lasx_xvmul_h CODE_FOR_mulv16hi3
 #define CODE_FOR_lasx_xvmul_w CODE_FOR_mulv8si3
 #define CODE_FOR_lasx_xvmul_d CODE_FOR_mulv4di3
+#define CODE_FOR_lasx_xvmuh_b CODE_FOR_smulv32qi3_highpart
+#define CODE_FOR_lasx_xvmuh_h CODE_FOR_smulv16hi3_highpart
+#define CODE_FOR_lasx_xvmuh_w CODE_FOR_smulv8si3_highpart
+#define CODE_FOR_lasx_xvmuh_d CODE_FOR_smulv4di3_highpart
+#define CODE_FOR_lasx_xvmuh_bu CODE_FOR_umulv32qi3_highpart
+#define CODE_FOR_lasx_xvmuh_hu CODE_FOR_umulv16hi3_highpart
+#define CODE_FOR_lasx_xvmuh_wu CODE_FOR_umulv8si3_highpart
+#define CODE_FOR_lasx_xvmuh_du CODE_FOR_umulv4di3_highpart
 #define CODE_FOR_lasx_xvclz_b CODE_FOR_clzv32qi2
 #define CODE_FOR_lasx_xvclz_h CODE_FOR_clzv16hi2
 #define CODE_FOR_lasx_xvclz_w CODE_FOR_clzv8si2
@@ -697,14 +705,6 @@ AVAIL_ALL (lasx, ISA_HAS_LASX)
 #define CODE_FOR_lasx_xvavgr_hu CODE_FOR_lasx_xvavgr_u_hu
 #define CODE_FOR_lasx_xvavgr_wu CODE_FOR_lasx_xvavgr_u_wu
 #define CODE_FOR_lasx_xvavgr_du CODE_FOR_lasx_xvavgr_u_du
-#define CODE_FOR_lasx_xvmuh_b CODE_FOR_lasx_xvmuh_s_b
-#define CODE_FOR_lasx_xvmuh_h CODE_FOR_lasx_xvmuh_s_h
-#define CODE_FOR_lasx_xvmuh_w CODE_FOR_lasx_xvmuh_s_w
-#define CODE_FOR_lasx_xvmuh_d CODE_FOR_lasx_xvmuh_s_d
-#define CODE_FOR_lasx_xvmuh_bu CODE_FOR_lasx_xvmuh_u_bu
-#define CODE_FOR_lasx_xvmuh_hu CODE_FOR_lasx_xvmuh_u_hu
-#define CODE_FOR_lasx_xvmuh_wu CODE_FOR_lasx_xvmuh_u_wu
-#define CODE_FOR_lasx_xvmuh_du CODE_FOR_lasx_xvmuh_u_du
 #define CODE_FOR_lasx_xvssran_b_h CODE_FOR_lasx_xvssran_s_b_h
 #define CODE_FOR_lasx_xvssran_h_w CODE_FOR_lasx_xvssran_s_h_w
 #define CODE_FOR_lasx_xvssran_w_d CODE_FOR_lasx_xvssran_s_w_d
diff --git a/gcc/config/loongarch/lsx.md b/gcc/config/loongarch/lsx.md
index c1c3719..537afaf 100644
--- a/gcc/config/loongarch/lsx.md
+++ b/gcc/config/loongarch/lsx.md
@@ -64,8 +64,6 @@
   UNSPEC_LSX_VSRLR
   UNSPEC_LSX_VSRLRI
   UNSPEC_LSX_VSHUF
-  UNSPEC_LSX_VMUH_S
-  UNSPEC_LSX_VMUH_U
   UNSPEC_LSX_VEXTW_S
   UNSPEC_LSX_VEXTW_U
   UNSPEC_LSX_VSLLWIL_S
@@ -2506,26 +2504,6 @@
   [(set_attr "type" "simd_logic")
    (set_attr "mode" "<MODE>")])
 
-(define_insn "lsx_vmuh_s_<lsxfmt>"
-  [(set (match_operand:ILSX 0 "register_operand" "=f")
-	(unspec:ILSX [(match_operand:ILSX 1 "register_operand" "f")
-		      (match_operand:ILSX 2 "register_operand" "f")]
-		     UNSPEC_LSX_VMUH_S))]
-  "ISA_HAS_LSX"
-  "vmuh.<lsxfmt>\t%w0,%w1,%w2"
-  [(set_attr "type" "simd_int_arith")
-   (set_attr "mode" "<MODE>")])
-
-(define_insn "lsx_vmuh_u_<lsxfmt_u>"
-  [(set (match_operand:ILSX 0 "register_operand" "=f")
-	(unspec:ILSX [(match_operand:ILSX 1 "register_operand" "f")
-		      (match_operand:ILSX 2 "register_operand" "f")]
-		     UNSPEC_LSX_VMUH_U))]
-  "ISA_HAS_LSX"
-  "vmuh.<lsxfmt_u>\t%w0,%w1,%w2"
-  [(set_attr "type" "simd_int_arith")
-   (set_attr "mode" "<MODE>")])
-
 (define_insn "lsx_vextw_s_d"
   [(set (match_operand:V2DI 0 "register_operand" "=f")
 	(unspec:V2DI [(match_operand:V4SI 1 "register_operand" "f")]
diff --git a/gcc/config/loongarch/simd.md b/gcc/config/loongarch/simd.md
index 27d1ffe..a0e8db3 100644
--- a/gcc/config/loongarch/simd.md
+++ b/gcc/config/loongarch/simd.md
@@ -206,6 +206,22 @@
   [(set_attr "type" "simd_fcvt")
    (set_attr "mode" "<MODE>")])
 
+;; <x>vmuh.{b/h/w/d}
+
+(define_code_attr muh
+  [(sign_extend "smul_highpart")
+   (zero_extend "umul_highpart")])
+
+(define_insn "<su>mul<mode>3_highpart"
+  [(set (match_operand:IVEC 0 "register_operand" "=f")
+	(<muh>:IVEC (match_operand:IVEC 1 "register_operand" "f")
+		    (match_operand:IVEC 2 "register_operand" "f")))
+   (any_extend (const_int 0))]
+  ""
+  "<x>vmuh.<simdfmt><u>\t%<wu>0,%<wu>1,%<wu>2"
+  [(set_attr "type" "simd_int_arith")
+   (set_attr "mode" "<MODE>")])
+
 ; The LoongArch SX Instructions.
 (include "lsx.md")
 
diff --git a/gcc/testsuite/gcc.target/loongarch/vect-muh.c b/gcc/testsuite/gcc.target/loongarch/vect-muh.c
new file mode 100644
index 0000000..a788840
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/vect-muh.c
@@ -0,0 +1,36 @@
+/* { dg-do compile } */
+/* { dg-options "-mlasx -O3" } */
+/* { dg-final { scan-assembler "\tvmuh\.w\t" } } */
+/* { dg-final { scan-assembler "\tvmuh\.wu\t" } } */
+/* { dg-final { scan-assembler "\txvmuh\.w\t" } } */
+/* { dg-final { scan-assembler "\txvmuh\.wu\t" } } */
+
+int a[8], b[8], c[8];
+
+void
+test1 (void)
+{
+  for (int i = 0; i < 4; i++)
+    c[i] = ((long)a[i] * (long)b[i]) >> 32;
+}
+
+void
+test2 (void)
+{
+  for (int i = 0; i < 4; i++)
+    c[i] = ((long)(unsigned)a[i] * (long)(unsigned)b[i]) >> 32;
+}
+
+void
+test3 (void)
+{
+  for (int i = 0; i < 8; i++)
+    c[i] = ((long)a[i] * (long)b[i]) >> 32;
+}
+
+void
+test4 (void)
+{
+  for (int i = 0; i < 8; i++)
+    c[i] = ((long)(unsigned)a[i] * (long)(unsigned)b[i]) >> 32;
+}