RISC-V: Add testcases for vector unsigned SAT_SUB form 2

The previous RISC-V backend .SAT_SUB enabling patch missed the form 2
testcases of vector modes.  Aka:

Form 2:
  #define DEF_VEC_SAT_U_SUB_FMT_2(T)                                   \
  void __attribute__((noinline))                                       \
  vec_sat_u_sub_##T##_fmt_2 (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];                                                 \
        out[i] = (x - y) & (-(T)(x > y));                              \
      }                                                                \
  }

This patch would like to make it up to ensure form 2 of .SAT_SUB vector
is covered.

Passed the rv64gcv rvv.exp tests.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-5.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-6.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-7.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-8.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-5.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-6.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-7.c: New test.
	* gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-8.c: New test.

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

8 files changed, 379 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-5.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-5.c
new file mode 100644
index 00000000000..b05f3ad14ee
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-5.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3 -ftree-vectorize -fdump-rtl-expand-details -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-skip-if "" { *-*-* } { "-flto" } } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+#include "vec_sat_arith.h"
+
+/*
+** vec_sat_u_sub_uint8_t_fmt_2:
+** ...
+** vsetvli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*e8,\s*m1,\s*ta,\s*ma
+** vle8\.v\s+v[0-9]+,\s*0\([atx][0-9]+\)
+** vle8\.v\s+v[0-9]+,\s*0\([atx][0-9]+\)
+** vssubu\.vv\s+v[0-9]+,\s*v[0-9]+,\s*v[0-9]+
+** ...
+*/
+DEF_VEC_SAT_U_SUB_FMT_2(uint8_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 4 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-6.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-6.c
new file mode 100644
index 00000000000..251a5332350
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-6.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3 -ftree-vectorize -fdump-rtl-expand-details -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-skip-if "" { *-*-* } { "-flto" } } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+#include "vec_sat_arith.h"
+
+/*
+** vec_sat_u_sub_uint16_t_fmt_2:
+** ...
+** vsetvli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*e16,\s*m1,\s*ta,\s*ma
+** ...
+** vle16\.v\s+v[0-9]+,\s*0\([atx][0-9]+\)
+** vle16\.v\s+v[0-9]+,\s*0\([atx][0-9]+\)
+** vssubu\.vv\s+v[0-9]+,\s*v[0-9]+,\s*v[0-9]+
+** ...
+*/
+DEF_VEC_SAT_U_SUB_FMT_2(uint16_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 4 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-7.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-7.c
new file mode 100644
index 00000000000..23fc3dcb1fd
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-7.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3 -ftree-vectorize -fdump-rtl-expand-details -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-skip-if "" { *-*-* } { "-flto" } } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+#include "vec_sat_arith.h"
+
+/*
+** vec_sat_u_sub_uint32_t_fmt_2:
+** ...
+** vsetvli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*e32,\s*m1,\s*ta,\s*ma
+** ...
+** vle32\.v\s+v[0-9]+,\s*0\([atx][0-9]+\)
+** vle32\.v\s+v[0-9]+,\s*0\([atx][0-9]+\)
+** vssubu\.vv\s+v[0-9]+,\s*v[0-9]+,\s*v[0-9]+
+** ...
+*/
+DEF_VEC_SAT_U_SUB_FMT_2(uint32_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 4 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-8.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-8.c
new file mode 100644
index 00000000000..9ad3f327ed7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-8.c
@@ -0,0 +1,20 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3 -ftree-vectorize -fdump-rtl-expand-details -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-skip-if "" { *-*-* } { "-flto" } } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+#include "vec_sat_arith.h"
+
+/*
+** vec_sat_u_sub_uint64_t_fmt_2:
+** ...
+** vsetvli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*e64,\s*m1,\s*ta,\s*ma
+** ...
+** vle64\.v\s+v[0-9]+,\s*0\([atx][0-9]+\)
+** vle64\.v\s+v[0-9]+,\s*0\([atx][0-9]+\)
+** vssubu\.vv\s+v[0-9]+,\s*v[0-9]+,\s*v[0-9]+
+** ...
+*/
+DEF_VEC_SAT_U_SUB_FMT_2(uint64_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 4 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-5.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-5.c
new file mode 100644
index 00000000000..cf72540feee
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-5.c
@@ -0,0 +1,75 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "vec_sat_arith.h"
+
+#define T                  uint8_t
+#define N                  16
+#define RUN_VEC_SAT_BINARY RUN_VEC_SAT_U_SUB_FMT_2
+
+DEF_VEC_SAT_U_SUB_FMT_2(T)
+
+T test_data[][3][N] = {
+  {
+    {
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+    }, /* arg_0 */
+    {
+      0, 1, 2, 3,
+      0, 1, 2, 3,
+      0, 1, 2, 3,
+      0, 1, 2, 3,
+    }, /* arg_1 */
+    {
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+    }, /* expect */
+  },
+  {
+    {
+	0, 255, 255, 255,
+	0, 255, 255, 255,
+	0, 255, 255, 255,
+	0, 255, 255, 255,
+    },
+    {
+	1, 255, 254, 251,
+	1, 255, 254, 251,
+	1, 255, 254, 251,
+	1, 255, 254, 251,
+    },
+    {
+	0,   0,   1,   4,
+	0,   0,   1,   4,
+	0,   0,   1,   4,
+	0,   0,   1,   4,
+    },
+  },
+  {
+    {
+	0,   0,   1,   0,
+	1,   2,   3,   0,
+	1,   2,   3, 255,
+	5, 254, 255,   9,
+    },
+    {
+	0,   1,   0, 254,
+      254, 254, 254, 255,
+      255, 255,   0, 252,
+      255, 255, 255,   1,
+    },
+    {
+	0,   0,   1,   0,
+	0,   0,   0,   0,
+	0,   0,   3,   3,
+	0,   0,   0,   8,
+    },
+  },
+};
+
+#include "vec_sat_binary.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-6.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-6.c
new file mode 100644
index 00000000000..e4e0c567179
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-6.c
@@ -0,0 +1,75 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "vec_sat_arith.h"
+
+#define T                  uint16_t
+#define N                  16
+#define RUN_VEC_SAT_BINARY RUN_VEC_SAT_U_SUB_FMT_2
+
+DEF_VEC_SAT_U_SUB_FMT_2(T)
+
+T test_data[][3][N] = {
+  {
+    {
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+    }, /* arg_0 */
+    {
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+    }, /* arg_1 */
+    {
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+      0, 0, 0, 0,
+    }, /* expect */
+  },
+  {
+    {
+      65535, 65535, 65535, 65535,
+      65535, 65535, 65535, 65535,
+      65535, 65535, 65535, 65535,
+      65535, 65535, 65535, 65535,
+    },
+    {
+      55535, 45535, 35535, 25535,
+      55535, 45535, 35535, 25535,
+      55535, 45535, 35535, 25535,
+      55535, 45535, 35535, 25535,
+    },
+    {
+      10000, 20000, 30000, 40000,
+      10000, 20000, 30000, 40000,
+      10000, 20000, 30000, 40000,
+      10000, 20000, 30000, 40000,
+    },
+  },
+  {
+    {
+	  0,     0,     1,     0,
+	  1,     2,     3,     0,
+	  1, 65535,     3, 65535,
+	  5, 65534, 65535,     9,
+    },
+    {
+	  0,     1,     1, 65534,
+      65534, 65534,     1, 65535,
+	  0, 65535, 65535,     0,
+      65535, 65535,     1,     2,
+    },
+    {
+	  0,     0,     0,     0,
+	  0,     0,     2,     0,
+	  1,     0,     0, 65535,
+	  0,     0, 65534,     7,
+    },
+  },
+};
+
+#include "vec_sat_binary.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-7.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-7.c
new file mode 100644
index 00000000000..833ec62f3c5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-7.c
@@ -0,0 +1,75 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "vec_sat_arith.h"
+
+#define T                  uint32_t
+#define N                  16
+#define RUN_VEC_SAT_BINARY RUN_VEC_SAT_U_SUB_FMT_2
+
+DEF_VEC_SAT_U_SUB_FMT_2(T)
+
+T test_data[][3][N] = {
+  {
+    {
+      0, 0, 4, 0,
+      0, 0, 4, 0,
+      0, 0, 4, 0,
+      0, 0, 4, 0,
+    }, /* arg_0 */
+    {
+      0, 1, 2, 3,
+      0, 1, 2, 3,
+      0, 1, 2, 3,
+      0, 1, 2, 3,
+    }, /* arg_1 */
+    {
+      0, 0, 2, 0,
+      0, 0, 2, 0,
+      0, 0, 2, 0,
+      0, 0, 2, 0,
+    }, /* expect */
+  },
+  {
+    {
+      4294967295, 4294967295, 4294967295, 4294967295,
+      4294967295, 4294967295, 4294967295, 4294967295,
+      4294967295, 4294967295, 4294967295, 4294967295,
+      4294967295, 4294967295, 4294967295, 4294967295,
+    },
+    {
+      1294967295, 2294967295, 3294967295, 4294967295,
+      1294967295, 2294967295, 3294967295, 4294967295,
+      1294967295, 2294967295, 3294967295, 4294967295,
+      1294967295, 2294967295, 3294967295, 4294967295,
+    },
+    {
+      3000000000, 2000000000, 1000000000,          0,
+      3000000000, 2000000000, 1000000000,          0,
+      3000000000, 2000000000, 1000000000,          0,
+      3000000000, 2000000000, 1000000000,          0,
+    },
+  },
+  {
+    {
+	       0,          0,          9,          0,
+	       1, 4294967295,          3,          0,
+	       1,          2,          3,          4,
+	       5, 4294967294, 4294967295, 4294967295,
+    },
+    {
+	       0,          1,          1, 4294967294,
+	       1,          2, 4294967294, 4294967295,
+	       1, 4294967295, 4294967295,          1,
+	       1, 4294967295, 4294967290,          9,
+    },
+    {
+	       0,          0,          8,          0,
+	       0, 4294967293,          0,          0,
+	       0,          0,          0,          3,
+	       4,          0,          5, 4294967286,
+    },
+  },
+};
+
+#include "vec_sat_binary.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-8.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-8.c
new file mode 100644
index 00000000000..fea1629609e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/binop/vec_sat_u_sub-run-8.c
@@ -0,0 +1,75 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "vec_sat_arith.h"
+
+#define T                  uint64_t
+#define N                  16
+#define RUN_VEC_SAT_BINARY RUN_VEC_SAT_U_SUB_FMT_2
+
+DEF_VEC_SAT_U_SUB_FMT_2(T)
+
+T test_data[][3][N] = {
+  {
+    {
+      0, 9, 0, 0,
+      0, 9, 0, 0,
+      0, 9, 0, 0,
+      0, 9, 0, 0,
+    }, /* arg_0 */
+    {
+      0, 2, 3, 1,
+      0, 2, 3, 1,
+      0, 2, 3, 1,
+      0, 2, 3, 1,
+    }, /* arg_1 */
+    {
+      0, 7, 0, 0,
+      0, 7, 0, 0,
+      0, 7, 0, 0,
+      0, 7, 0, 0,
+    }, /* expect */
+  },
+  {
+    {
+      18446744073709551615u, 18446744073709551615u, 18446744073709551615u, 18446744073709551615u,
+      18446744073709551615u, 18446744073709551615u, 18446744073709551615u, 18446744073709551615u,
+      18446744073709551615u, 18446744073709551615u, 18446744073709551615u, 18446744073709551615u,
+      18446744073709551615u, 18446744073709551615u, 18446744073709551615u, 18446744073709551615u,
+    },
+    {
+      10446744073709551615u, 11446744073709551615u, 12446744073709551615u, 18446744073709551615u,
+      10446744073709551615u, 11446744073709551615u, 12446744073709551615u, 18446744073709551615u,
+      10446744073709551615u, 11446744073709551615u, 12446744073709551615u, 18446744073709551615u,
+      10446744073709551615u, 11446744073709551615u, 12446744073709551615u, 18446744073709551615u,
+    },
+    {
+       8000000000000000000u,  7000000000000000000u,  6000000000000000000u,                    0u,
+       8000000000000000000u,  7000000000000000000u,  6000000000000000000u,                    0u,
+       8000000000000000000u,  7000000000000000000u,  6000000000000000000u,                    0u,
+       8000000000000000000u,  7000000000000000000u,  6000000000000000000u,                    0u,
+    },
+  },
+  {
+    {
+			  0, 18446744073709551615u,                     1,                     0,
+			  1, 18446744073709551615u,                     3,                     0,
+			  1, 18446744073709551614u,                     3,                     4,
+			  5, 18446744073709551614u, 18446744073709551615u,                     9,
+    },
+    {
+			  0,                     1,                     1, 18446744073709551614u,
+      18446744073709551614u, 18446744073709551614u, 18446744073709551614u, 18446744073709551615u,
+      18446744073709551615u, 18446744073709551615u, 18446744073709551615u, 18446744073709551615u,
+      18446744073709551615u, 18446744073709551615u, 18446744073709551615u,                     1,
+    },
+    {
+			  0, 18446744073709551614u,                     0,                     0,
+			  0,                     1,                     0,                     0,
+			  0,                     0,                     0,                     0,
+			  0,                     0,                     0,                     8,
+    },
+  },
+};
+
+#include "vec_sat_binary.h"