RISC-V: Add testcases for unsigned .SAT_SUB scalar form 11

After the middle-end support the form 11 of unsigned SAT_SUB and
the RISC-V backend implement the SAT_SUB for vector mode, add
more test case to cover the form 11.

Form 11:
  #define DEF_SAT_U_SUB_FMT_11(T)                        \
  T __attribute__((noinline))                            \
  sat_u_sub_##T##_fmt_11 (T x, T y)                      \
  {                                                      \
    T ret;                                               \
    bool overflow = __builtin_sub_overflow (x, y, &ret); \
    return overflow ? 0 : ret;                           \
  }

Passed the rv64gcv regression tests.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/sat_arith.h: Add helper
	macro for testing.
	* gcc.target/riscv/sat_u_sub-41.c: New test.
	* gcc.target/riscv/sat_u_sub-42.c: New test.
	* gcc.target/riscv/sat_u_sub-43.c: New test.
	* gcc.target/riscv/sat_u_sub-44.c: New test.
	* gcc.target/riscv/sat_u_sub-run-41.c: New test.
	* gcc.target/riscv/sat_u_sub-run-42.c: New test.
	* gcc.target/riscv/sat_u_sub-run-43.c: New test.
	* gcc.target/riscv/sat_u_sub-run-44.c: New test.

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

9 files changed, 183 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/riscv/sat_arith.h b/gcc/testsuite/gcc.target/riscv/sat_arith.h
index 0f94c5f..ab7289a 100644
--- a/gcc/testsuite/gcc.target/riscv/sat_arith.h
+++ b/gcc/testsuite/gcc.target/riscv/sat_arith.h
@@ -2,6 +2,7 @@
 #define HAVE_SAT_ARITH
 
 #include <stdint-gcc.h>
+#include <stdbool.h>
 
 /******************************************************************************/
 /* Saturation Add (unsigned and signed)                                       */
@@ -140,6 +141,15 @@ sat_u_sub_##T##_fmt_10 (T x, T y)                   \
   return !overflow ? ret : 0;                       \
 }
 
+#define DEF_SAT_U_SUB_FMT_11(T)                        \
+T __attribute__((noinline))                            \
+sat_u_sub_##T##_fmt_11 (T x, T y)                      \
+{                                                      \
+  T ret;                                               \
+  bool overflow = __builtin_sub_overflow (x, y, &ret); \
+  return overflow ? 0 : ret;                           \
+}
+
 #define RUN_SAT_U_SUB_FMT_1(T, x, y) sat_u_sub_##T##_fmt_1(x, y)
 #define RUN_SAT_U_SUB_FMT_2(T, x, y) sat_u_sub_##T##_fmt_2(x, y)
 #define RUN_SAT_U_SUB_FMT_3(T, x, y) sat_u_sub_##T##_fmt_3(x, y)
@@ -150,5 +160,6 @@ sat_u_sub_##T##_fmt_10 (T x, T y)                   \
 #define RUN_SAT_U_SUB_FMT_8(T, x, y) sat_u_sub_##T##_fmt_8(x, y)
 #define RUN_SAT_U_SUB_FMT_9(T, x, y) sat_u_sub_##T##_fmt_9(x, y)
 #define RUN_SAT_U_SUB_FMT_10(T, x, y) sat_u_sub_##T##_fmt_10(x, y)
+#define RUN_SAT_U_SUB_FMT_11(T, x, y) sat_u_sub_##T##_fmt_11(x, y)
 
 #endif
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_sub-41.c b/gcc/testsuite/gcc.target/riscv/sat_u_sub-41.c
new file mode 100644
index 0000000..dd13f94
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_sub-41.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gc -mabi=lp64d -O3 -fdump-rtl-expand-details -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+#include "sat_arith.h"
+
+/*
+** sat_u_sub_uint8_t_fmt_11:
+** sub\s+[atx][0-9]+,\s*a0,\s*a1
+** sltu\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** addi\s+[atx][0-9]+,\s*[atx][0-9]+,\s*-1
+** and\s+a0,\s*a0,\s*[atx][0-9]+
+** andi\s+a0,\s*a0,\s*0xff
+** ret
+*/
+DEF_SAT_U_SUB_FMT_11(uint8_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_sub-42.c b/gcc/testsuite/gcc.target/riscv/sat_u_sub-42.c
new file mode 100644
index 0000000..3ed4195
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_sub-42.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gc -mabi=lp64d -O3 -fdump-rtl-expand-details -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+#include "sat_arith.h"
+
+/*
+** sat_u_sub_uint16_t_fmt_11:
+** sub\s+[atx][0-9]+,\s*a0,\s*a1
+** sltu\s+[atx][0-9]+,\s*a0,\s*a1
+** addi\s+[atx][0-9]+,\s*[atx][0-9]+,\s*-1
+** and\s+a0,\s*[atx][0-9]+,\s*[atx][0-9]+
+** slli\s+a0,\s*a0,\s*48
+** srli\s+a0,\s*a0,\s*48
+** ret
+*/
+DEF_SAT_U_SUB_FMT_11(uint16_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_sub-43.c b/gcc/testsuite/gcc.target/riscv/sat_u_sub-43.c
new file mode 100644
index 0000000..b1afaf1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_sub-43.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gc -mabi=lp64d -O3 -fdump-rtl-expand-details -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+#include "sat_arith.h"
+
+/*
+** sat_u_sub_uint32_t_fmt_11:
+** sub\s+[atx][0-9]+,\s*a0,\s*a1
+** sltu\s+[atx][0-9]+,\s*a0,\s*a1
+** addi\s+[atx][0-9]+,\s*[atx][0-9]+,\s*-1
+** and\s+a0,\s*[atx][0-9]+,\s*[atx][0-9]+
+** sext.w\s+a0,\s*a0
+** ret
+*/
+DEF_SAT_U_SUB_FMT_11(uint32_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_sub-44.c b/gcc/testsuite/gcc.target/riscv/sat_u_sub-44.c
new file mode 100644
index 0000000..123f6bd
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_sub-44.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gc -mabi=lp64d -O3 -fdump-rtl-expand-details -fno-schedule-insns -fno-schedule-insns2" } */
+/* { dg-final { check-function-bodies "**" "" } } */
+
+#include "sat_arith.h"
+
+/*
+** sat_u_sub_uint64_t_fmt_11:
+** sub\s+[atx][0-9]+,\s*a0,\s*a1
+** sltu\s+[atx][0-9]+,\s*a0,\s*a1
+** addi\s+a0,\s*[atx][0-9]+,\s*-1
+** and\s+a0,\s*[atx][0-9]+,\s*[atx][0-9]+
+** ret
+*/
+DEF_SAT_U_SUB_FMT_11(uint64_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-41.c b/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-41.c
new file mode 100644
index 0000000..949bd0d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-41.c
@@ -0,0 +1,25 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "sat_arith.h"
+
+#define T              uint8_t
+#define RUN_SAT_BINARY RUN_SAT_U_SUB_FMT_11
+
+DEF_SAT_U_SUB_FMT_11(T)
+
+T test_data[][3] = {
+  /* arg_0, arg_1, expect */
+  {      0,     0,      0, },
+  {      0,     1,      0, },
+  {      1,     1,      0, },
+  {    255,   254,      1, },
+  {    255,   255,      0, },
+  {    254,   255,      0, },
+  {    253,   254,      0, },
+  {      0,   255,      0, },
+  {      1,   255,      0, },
+  {     32,     5,     27, },
+};
+
+#include "scalar_sat_binary.h"
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-42.c b/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-42.c
new file mode 100644
index 0000000..534795c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-42.c
@@ -0,0 +1,25 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "sat_arith.h"
+
+#define T              uint16_t
+#define RUN_SAT_BINARY RUN_SAT_U_SUB_FMT_11
+
+DEF_SAT_U_SUB_FMT_11(T)
+
+T test_data[][3] = {
+  /* arg_0, arg_1, expect */
+  {      0,     0,      0, },
+  {      0,     1,      0, },
+  {      1,     1,      0, },
+  {  65535, 65534,      1, },
+  {  65535, 65535,      0, },
+  {  65534, 65535,      0, },
+  {  65533, 65534,      0, },
+  {      0, 65535,      0, },
+  {      1, 65535,      0, },
+  {     35,     5,     30, },
+};
+
+#include "scalar_sat_binary.h"
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-43.c b/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-43.c
new file mode 100644
index 0000000..4d0a34f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-43.c
@@ -0,0 +1,25 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "sat_arith.h"
+
+#define T              uint32_t
+#define RUN_SAT_BINARY RUN_SAT_U_SUB_FMT_11
+
+DEF_SAT_U_SUB_FMT_11(T)
+
+T test_data[][3] = {
+  /*     arg_0,      arg_1,      expect */
+  {          0,          0,           0, },
+  {          0,          1,           0, },
+  {          1,          1,           0, },
+  { 4294967295, 4294967294,           1, },
+  { 4294967295, 4294967295,           0, },
+  { 4294967294, 4294967295,           0, },
+  { 4294967293, 4294967294,           0, },
+  {          1, 4294967295,           0, },
+  {          2, 4294967295,           0, },
+  {          5,          1,           4, },
+};
+
+#include "scalar_sat_binary.h"
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-44.c b/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-44.c
new file mode 100644
index 0000000..d74d10d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_sub-run-44.c
@@ -0,0 +1,25 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "sat_arith.h"
+
+#define T              uint64_t
+#define RUN_SAT_BINARY RUN_SAT_U_SUB_FMT_11
+
+DEF_SAT_U_SUB_FMT_11(T)
+
+T test_data[][3] = {
+  /*                arg_0,                 arg_1,                 expect */
+  {                     0,                     0,                      0, },
+  {                     0,                     1,                      0, },
+  {                     1,                     1,                      0, },
+  { 18446744073709551615u, 18446744073709551614u,                      1, },
+  { 18446744073709551615u, 18446744073709551615u,                      0, },
+  { 18446744073709551614u, 18446744073709551615u,                      0, },
+  { 18446744073709551613u, 18446744073709551614u,                      0, },
+  {                     0, 18446744073709551615u,                      0, },
+  {                     1, 18446744073709551615u,                      0, },
+  {                    43,                    11,                     32, },
+};
+
+#include "scalar_sat_binary.h"