LoongArch: Add alsl.wu

On 64-bit capable LoongArch hardware, alsl.wu is similar to alsl.w but
zero-extending the 32-bit result.

gcc/ChangeLog:

	* config/loongarch/loongarch.md (alslsi3_extend): Add alsl.wu.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/alsl_wu.c: New test.

diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
index 59f457703110646991c350b84ad347740dd69df8..1b46e8e4af0d21ddc5d805ff92712d61ae0c8a72 100644 (file)
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -3143,15 +3143,15 @@
   [(set_attr "type" "arith")
    (set_attr "mode" "<MODE>")])
 
-(define_insn "alslsi3_extend"
+(define_insn "*alslsi3_extend"
   [(set (match_operand:DI 0 "register_operand" "=r")
-       (sign_extend:DI
+       (any_extend:DI
          (plus:SI
            (ashift:SI (match_operand:SI 1 "register_operand" "r")
                       (match_operand 2 "const_immalsl_operand" ""))
            (match_operand:SI 3 "register_operand" "r"))))]
-  ""
-  "alsl.w\t%0,%1,%3,%2"
+  "TARGET_64BIT"
+  "alsl.w<u>\t%0,%1,%3,%2"
   [(set_attr "type" "arith")
    (set_attr "mode" "SI")])
 

diff --git a/gcc/testsuite/gcc.target/loongarch/alsl_wu.c b/gcc/testsuite/gcc.target/loongarch/alsl_wu.c
new file mode 100644 (file)
index 0000000..65f55e6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/alsl_wu.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-march=loongarch64 -mabi=lp64d -O2" } */
+/* { dg-final { scan-assembler "alsl\\.wu" } } */
+
+unsigned long
+test (unsigned int a, unsigned int b)
+{
+  return (a << 2) + b;
+}