RISC-V: Add testcases for form 3 of vector signed SAT_SUB

Form 3:
  #define DEF_VEC_SAT_S_SUB_FMT_3(T, UT, MIN, MAX)                     \
  void __attribute__((noinline))                                       \
  vec_sat_s_sub_##T##_fmt_3 (T *out, T *op_1, T *op_2, unsigned limit) \
  {                                                                    \
    unsigned i;                                                        \
    for (i = 0; i < limit; i++)                                        \
      {                                                                \
        T x = op_1[i];                                                 \
        T y = op_2[i];                                                 \
        T minus;                                                       \
        bool overflow = __builtin_sub_overflow (x, y, &minus);         \
        out[i] = overflow ? x < 0 ? MIN : MAX : minus;                 \
      }                                                                \
  }

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

It is test only patch and obvious up to a point, will commit it
directly if no comments in next 48H.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/vec_sat_arith.h: Add test helper macros.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i16.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i32.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i64.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i8.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i16.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i32.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i64.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i8.c: New test.

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

9 files changed, 126 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i16.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i16.c
new file mode 100644
index 0000000..c10dc09
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i16.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3 -ftree-vectorize -fdump-rtl-expand-details" } */
+
+#include "../vec_sat_arith.h"
+
+DEF_VEC_SAT_S_SUB_FMT_3(int16_t, uint16_t, INT16_MIN, INT16_MAX)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
+/* { dg-final { scan-assembler-times {vssub\.vv} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i32.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i32.c
new file mode 100644
index 0000000..d1352ed
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i32.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3 -ftree-vectorize -fdump-rtl-expand-details" } */
+
+#include "../vec_sat_arith.h"
+
+DEF_VEC_SAT_S_SUB_FMT_3(int32_t, uint32_t, INT32_MIN, INT32_MAX)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
+/* { dg-final { scan-assembler-times {vssub\.vv} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i64.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i64.c
new file mode 100644
index 0000000..b86887d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i64.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3 -ftree-vectorize -fdump-rtl-expand-details" } */
+
+#include "../vec_sat_arith.h"
+
+DEF_VEC_SAT_S_SUB_FMT_3(int64_t, uint64_t, INT64_MIN, INT64_MAX)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
+/* { dg-final { scan-assembler-times {vssub\.vv} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i8.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i8.c
new file mode 100644
index 0000000..79ce8dc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-3-i8.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3 -ftree-vectorize -fdump-rtl-expand-details" } */
+
+#include "../vec_sat_arith.h"
+
+DEF_VEC_SAT_S_SUB_FMT_3(int8_t, uint8_t, INT8_MIN, INT8_MAX)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
+/* { dg-final { scan-assembler-times {vssub\.vv} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i16.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i16.c
new file mode 100644
index 0000000..9e26214
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i16.c
@@ -0,0 +1,17 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "../vec_sat_arith.h"
+#include "vec_sat_data.h"
+
+#define T  int16_t
+#define T1 int16_t
+#define T2 uint16_t
+
+DEF_VEC_SAT_S_SUB_FMT_3_WRAP (T1, T2, INT16_MIN, INT16_MAX)
+
+#define test_data          TEST_BINARY_DATA_NAME_WRAP(T, T, sssub)
+#define RUN_VEC_SAT_BINARY(T, out, op_1, op_2, N) \
+  RUN_VEC_SAT_S_SUB_FMT_3_WRAP(T, out, op_1, op_2, N)
+
+#include "vec_sat_binary_vvv_run.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i32.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i32.c
new file mode 100644
index 0000000..ed6bc57
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i32.c
@@ -0,0 +1,17 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "../vec_sat_arith.h"
+#include "vec_sat_data.h"
+
+#define T  int32_t
+#define T1 int32_t
+#define T2 uint32_t
+
+DEF_VEC_SAT_S_SUB_FMT_3_WRAP (T1, T2, INT32_MIN, INT32_MAX)
+
+#define test_data          TEST_BINARY_DATA_NAME_WRAP(T, T, sssub)
+#define RUN_VEC_SAT_BINARY(T, out, op_1, op_2, N) \
+  RUN_VEC_SAT_S_SUB_FMT_3_WRAP(T, out, op_1, op_2, N)
+
+#include "vec_sat_binary_vvv_run.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i64.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i64.c
new file mode 100644
index 0000000..d62a4a7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i64.c
@@ -0,0 +1,17 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "../vec_sat_arith.h"
+#include "vec_sat_data.h"
+
+#define T  int64_t
+#define T1 int64_t
+#define T2 uint64_t
+
+DEF_VEC_SAT_S_SUB_FMT_3_WRAP (T1, T2, INT64_MIN, INT64_MAX)
+
+#define test_data          TEST_BINARY_DATA_NAME_WRAP(T, T, sssub)
+#define RUN_VEC_SAT_BINARY(T, out, op_1, op_2, N) \
+  RUN_VEC_SAT_S_SUB_FMT_3_WRAP(T, out, op_1, op_2, N)
+
+#include "vec_sat_binary_vvv_run.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i8.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i8.c
new file mode 100644
index 0000000..56b0f22
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_s_sub-run-3-i8.c
@@ -0,0 +1,17 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "../vec_sat_arith.h"
+#include "vec_sat_data.h"
+
+#define T  int8_t
+#define T1 int8_t
+#define T2 uint8_t
+
+DEF_VEC_SAT_S_SUB_FMT_3_WRAP (T1, T2, INT8_MIN, INT8_MAX)
+
+#define test_data          TEST_BINARY_DATA_NAME_WRAP(T, T, sssub)
+#define RUN_VEC_SAT_BINARY(T, out, op_1, op_2, N) \
+  RUN_VEC_SAT_S_SUB_FMT_3_WRAP(T, out, op_1, op_2, N)
+
+#include "vec_sat_binary_vvv_run.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vec_sat_arith.h b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vec_sat_arith.h
index 93decee..eadd2b0 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vec_sat_arith.h
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vec_sat_arith.h
@@ -483,6 +483,23 @@ vec_sat_s_sub_##T##_fmt_2 (T *out, T *op_1, T *op_2, unsigned limit) \
 #define DEF_VEC_SAT_S_SUB_FMT_2_WRAP(T, UT, MIN, MAX) \
   DEF_VEC_SAT_S_SUB_FMT_2(T, UT, MIN, MAX)
 
+#define DEF_VEC_SAT_S_SUB_FMT_3(T, UT, MIN, MAX)                     \
+void __attribute__((noinline))                                       \
+vec_sat_s_sub_##T##_fmt_3 (T *out, T *op_1, T *op_2, unsigned limit) \
+{                                                                    \
+  unsigned i;                                                        \
+  for (i = 0; i < limit; i++)                                        \
+    {                                                                \
+      T x = op_1[i];                                                 \
+      T y = op_2[i];                                                 \
+      T minus;                                                       \
+      bool overflow = __builtin_sub_overflow (x, y, &minus);         \
+      out[i] = overflow ? x < 0 ? MIN : MAX : minus;                 \
+    }                                                                \
+}
+#define DEF_VEC_SAT_S_SUB_FMT_3_WRAP(T, UT, MIN, MAX) \
+  DEF_VEC_SAT_S_SUB_FMT_3(T, UT, MIN, MAX)
+
 #define RUN_VEC_SAT_U_SUB_FMT_1(T, out, op_1, op_2, N) \
   vec_sat_u_sub_##T##_fmt_1(out, op_1, op_2, N)
 
@@ -528,6 +545,11 @@ vec_sat_s_sub_##T##_fmt_2 (T *out, T *op_1, T *op_2, unsigned limit) \
 #define RUN_VEC_SAT_S_SUB_FMT_2_WRAP(T, out, op_1, op_2, N) \
   RUN_VEC_SAT_S_SUB_FMT_2(T, out, op_1, op_2, N)
 
+#define RUN_VEC_SAT_S_SUB_FMT_3(T, out, op_1, op_2, N) \
+  vec_sat_s_sub_##T##_fmt_3(out, op_1, op_2, N)
+#define RUN_VEC_SAT_S_SUB_FMT_3_WRAP(T, out, op_1, op_2, N) \
+  RUN_VEC_SAT_S_SUB_FMT_3(T, out, op_1, op_2, N)
+
 /******************************************************************************/
 /* Saturation Sub Truncated (Unsigned and Signed)                             */
 /******************************************************************************/