[gcc(refs/vendors/riscv/heads/gcc-15-with-riscv-opts)] RISC-V: Support RVVDImode for avg3_ceil auto vect

[Jeff Law]

https://gcc.gnu.org/g:97e7f86e282b8b04c35932979422f3e26377d7e3

commit 97e7f86e282b8b04c35932979422f3e26377d7e3
Author: Pan Li <pan2.li@intel.com>
Date:   Wed Jul 16 21:40:14 2025 +0800

    RISC-V: Support RVVDImode for avg3_ceil auto vect
    
    Like the avg3_floor pattern, the avg3_ceil has the
    similar issue that lack of the RVV DImode support.
    
    Thus, this patch would like to support the DImode by
    the standard name, with the iterator V_VLSI_D.
    
    The below test suites are passed for this patch series.
    * The rv64gcv fully regression test.
    
    gcc/ChangeLog:
    
            * config/riscv/autovec.md (avg<mode>3_ceil): Add new pattern
            of avg3_ceil for RVV DImode
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/riscv/rvv/autovec/avg_data.h: Adjust the test data.
            * gcc.target/riscv/rvv/autovec/avg_ceil-1-i64-from-i128.c: New test.
            * gcc.target/riscv/rvv/autovec/avg_ceil-run-1-i64-from-i128.c: New test.
    
    Signed-off-by: Pan Li <pan2.li@intel.com>
    (cherry picked from commit c1a34e80991c85d02af6be3edb4f8c4e1116e363)

Diff:
---
 gcc/config/riscv/autovec.md                              | 13 +++++++++++++
 .../riscv/rvv/autovec/avg_ceil-1-i64-from-i128.c         | 12 ++++++++++++
 .../riscv/rvv/autovec/avg_ceil-run-1-i64-from-i128.c     | 16 ++++++++++++++++
 gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_data.h    |  2 +-
 4 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/gcc/config/riscv/autovec.md b/gcc/config/riscv/autovec.md
index 2e86826f286e..da5d0e34d0ab 100644
--- a/gcc/config/riscv/autovec.md
+++ b/gcc/config/riscv/autovec.md
@@ -2532,6 +2532,19 @@
   }
 )
 
+(define_expand "avg<mode>3_ceil"
+ [(match_operand:V_VLSI_D 0 "register_operand")
+  (match_operand:V_VLSI_D 1 "register_operand")
+  (match_operand:V_VLSI_D 2 "register_operand")]
+  "TARGET_VECTOR"
+  {
+    insn_code icode = code_for_pred (UNSPEC_VAADD, <MODE>mode);
+    riscv_vector::emit_vlmax_insn (icode, riscv_vector::BINARY_OP_VXRM_RNU,
+				   operands);
+    DONE;
+  }
+)
+
 ;; csrwi vxrm, 2
 ;; vaaddu.vv vd, vs2, vs1
 (define_expand "uavg<mode>3_floor"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_ceil-1-i64-from-i128.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_ceil-1-i64-from-i128.c
new file mode 100644
index 000000000000..64df06b27e9b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_ceil-1-i64-from-i128.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d" } */
+
+#include "avg.h"
+
+#define NT int64_t
+#define WT int128_t
+
+DEF_AVG_1(NT, WT, avg_ceil)
+
+/* { dg-final { scan-assembler-times {csrwi\s*vxrm,\s*0} 1 } } */
+/* { dg-final { scan-assembler-times {vaadd.vv} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_ceil-run-1-i64-from-i128.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_ceil-run-1-i64-from-i128.c
new file mode 100644
index 000000000000..ee5330ca8a5d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_ceil-run-1-i64-from-i128.c
@@ -0,0 +1,16 @@
+/* { dg-do run { target { riscv_v && rv64 } } } */
+/* { dg-additional-options "-std=c99 -O3 -Wno-pedantic" } */
+
+#include "avg.h"
+#include "avg_data.h"
+
+#define WT   int128_t
+#define NT   int64_t
+#define NAME avg_ceil
+
+DEF_AVG_1_WRAP(NT, WT, NAME)
+
+#define TEST_DATA                            TEST_AVG_DATA_WRAP(NT, NAME)
+#define TEST_RUN(NT, WT, NAME, a, b, out, n) RUN_AVG_1_WRAP(NT, WT, NAME, a, b, out, n)
+
+#include "avg_run.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_data.h b/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_data.h
index a4a4536241dd..49103f3f6915 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_data.h
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/avg_data.h
@@ -345,8 +345,8 @@ int64_t TEST_AVG_DATA(int64_t, avg_ceil)[][3][N] =
     },
     {
        9223372036854775806ull,  9223372036854775806ull,  9223372036854775806ull,  9223372036854775806ull,
-       9223372036854775807ull,  9223372036854775807ull,  9223372036854775807ull,  9223372036854775807ull,
                         -2ull,                   -2ull,                   -2ull,                   -2ull,
+       9223372036854775807ull,  9223372036854775807ull,  9223372036854775807ull,  9223372036854775807ull,
       -9223372036854775807ull, -9223372036854775807ull, -9223372036854775807ull, -9223372036854775807ull,
     },
     {