RISC-V: Add ashiftrt operand 2 for vector avg_floor and avg_ceil

According to the semantics of the avg_floor and avg_ceil as below:

floor: op0 = (narrow) (((wide) op1 + (wide) op2) >> 1);
ceil:  op0 = (narrow) (((wide) op1 + (wide) op2 + 1) >> 1);

Aka we have (const_int 1) as the op2 of the ashiftrt but seems missed.
Thus, add it back to align the definition.

The below test suites are passed for this patch.
* The rv64gcv fully regression test.

gcc/ChangeLog:

	* config/riscv/autovec.md: Add (const_int 1) as the op2 of
	ashiftrt.

Signed-off-by: Pan Li <pan2.li@intel.com>

diff --git a/gcc/config/riscv/autovec.md b/gcc/config/riscv/autovec.md
index da5d0e34d0ab07ad3ac15aadbfd3b03315b9b919..1fff8ac2fc462db6f5ffa16bf83b998cf6da1687 100644 (file)
--- a/gcc/config/riscv/autovec.md
+++ b/gcc/config/riscv/autovec.md
@@ -2489,7 +2489,8 @@
       (sign_extend:VWEXTI
        (match_operand:<V_DOUBLE_TRUNC> 1 "register_operand"))
       (sign_extend:VWEXTI
-       (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand"))))))]
+       (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand")))
+     (const_int 1))))]
   "TARGET_VECTOR"
   {
     insn_code icode = code_for_pred (UNSPEC_VAADD, <V_DOUBLE_TRUNC>mode);
@@ -2522,7 +2523,8 @@
        (match_operand:<V_DOUBLE_TRUNC> 1 "register_operand"))
        (sign_extend:VWEXTI
        (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand")))
-      (const_int 1)))))]
+      (const_int 1))
+     (const_int 1))))]
   "TARGET_VECTOR"
   {
     insn_code icode = code_for_pred (UNSPEC_VAADD, <V_DOUBLE_TRUNC>mode);