diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md index 4a98f2d7b6251da940806b26d4c310a7f7af927b..330c0a5ce2926439760466746a68fd5f6c5b1b09 100644 --- a/gcc/config/arm/arm.md +++ b/gcc/config/arm/arm.md @@ -12601,6 +12601,18 @@ (set_attr "type" "rev")] ) +;; Similar pattern to match (rotate (bswap) 16) +(define_insn "*arm_rev16si2_alt3" + [(set (match_operand:SI 0 "register_operand" "=l,r") + (rotate:SI (bswap:SI (match_operand:SI 1 "register_operand" "l,r")) + (const_int 16)))] + "arm_arch6" + "rev16\\t%0, %1" + [(set_attr "arch" "t,32") + (set_attr "length" "2,4") + (set_attr "type" "rev")] +) + (define_expand "arm_rev16si2" [(set (match_operand:SI 0 "s_register_operand") (bswap:SI (match_operand:SI 1 "s_register_operand")))] diff --git a/gcc/testsuite/gcc.target/arm/rev16.c b/gcc/testsuite/gcc.target/arm/rev16_1.c similarity index 100% rename from gcc/testsuite/gcc.target/arm/rev16.c rename to gcc/testsuite/gcc.target/arm/rev16_1.c diff --git a/gcc/testsuite/gcc.target/arm/rev16_2.c b/gcc/testsuite/gcc.target/arm/rev16_2.c new file mode 100644 index 0000000000000000000000000000000000000000..90213f9b49f45340ced4f29c31446971dbc88ecd --- /dev/null +++ b/gcc/testsuite/gcc.target/arm/rev16_2.c @@ -0,0 +1,20 @@ +/* { dg-options "-O2" } */ +/* { dg-do compile } */ + +typedef unsigned int __u32; + +__u32 +__rev16_32_alt (__u32 x) +{ + return (((__u32)(x) & (__u32)0xff00ff00UL) >> 8) + | (((__u32)(x) & (__u32)0x00ff00ffUL) << 8); +} + +__u32 +__rev16_32 (__u32 x) +{ + return (((__u32)(x) & (__u32)0x00ff00ffUL) << 8) + | (((__u32)(x) & (__u32)0xff00ff00UL) >> 8); +} + +/* { dg-final { scan-assembler-times {rev16\tr[0-9]+, r[0-9]+} 2 } } */ \ No newline at end of file