RISC-V: Add testcases for scalar unsigned SAT_ADD form 2

After the middle-end support the form 2 of unsigned SAT_ADD and
the RISC-V backend implement the scalar .SAT_ADD, add more test
case to cover the form 2 of unsigned .SAT_ADD.

Form 2:

  #define SAT_ADD_U_2(T) \
  T sat_add_u_2_##T(T x, T y) \
  { \
    T ret; \
    T overflow = __builtin_add_overflow (x, y, &ret); \
    return (T)(-overflow) | ret; \
  }

Passed the rv64gcv fully regression test.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/sat_arith.h: Add test macro for form 2.
	* gcc.target/riscv/sat_u_add-10.c: New test.
	* gcc.target/riscv/sat_u_add-11.c: New test.
	* gcc.target/riscv/sat_u_add-12.c: New test.
	* gcc.target/riscv/sat_u_add-9.c: New test.
	* gcc.target/riscv/sat_u_add-run-10.c: New test.
	* gcc.target/riscv/sat_u_add-run-11.c: New test.
	* gcc.target/riscv/sat_u_add-run-12.c: New test.
	* gcc.target/riscv/sat_u_add-run-9.c: New test.

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

9 files changed, 185 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/riscv/sat_arith.h b/gcc/testsuite/gcc.target/riscv/sat_arith.h
index 2abc83d..d44fd63 100644
--- a/gcc/testsuite/gcc.target/riscv/sat_arith.h
+++ b/gcc/testsuite/gcc.target/riscv/sat_arith.h
@@ -17,6 +17,15 @@ sat_u_add_##T##_fmt_2 (T x, T y)         \
   return (T)(x + y) >= x ? (x + y) : -1; \
 }
 
+#define DEF_SAT_U_ADD_FMT_3(T)                      \
+T __attribute__((noinline))                         \
+sat_u_add_##T##_fmt_3 (T x, T y)                    \
+{                                                   \
+  T ret;                                            \
+  T overflow = __builtin_add_overflow (x, y, &ret); \
+  return (T)(-overflow) | ret;                      \
+}
+
 #define DEF_VEC_SAT_U_ADD_FMT_1(T)                                   \
 void __attribute__((noinline))                                       \
 vec_sat_u_add_##T##_fmt_1 (T *out, T *op_1, T *op_2, unsigned limit) \
@@ -32,6 +41,7 @@ vec_sat_u_add_##T##_fmt_1 (T *out, T *op_1, T *op_2, unsigned limit) \
 
 #define RUN_SAT_U_ADD_FMT_1(T, x, y) sat_u_add_##T##_fmt_1(x, y)
 #define RUN_SAT_U_ADD_FMT_2(T, x, y) sat_u_add_##T##_fmt_2(x, y)
+#define RUN_SAT_U_ADD_FMT_3(T, x, y) sat_u_add_##T##_fmt_3(x, y)
 
 #define RUN_VEC_SAT_U_ADD_FMT_1(T, out, op_1, op_2, N) \
   vec_sat_u_add_##T##_fmt_1(out, op_1, op_2, N)
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_add-10.c b/gcc/testsuite/gcc.target/riscv/sat_u_add-10.c
new file mode 100644
index 0000000..3f627ef
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_add-10.c
@@ -0,0 +1,21 @@
+/* { 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_add_uint16_t_fmt_3:
+** add\s+[atx][0-9]+,\s*a0,\s*a1
+** slli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*48
+** srli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*48
+** sltu\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** neg\s+[atx][0-9]+,\s*[atx][0-9]+
+** or\s+[atx][0-9]+,\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_ADD_FMT_3(uint16_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_ADD " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_add-11.c b/gcc/testsuite/gcc.target/riscv/sat_u_add-11.c
new file mode 100644
index 0000000..b6dc779
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_add-11.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_add_uint32_t_fmt_3:
+** addw\s+[atx][0-9]+,\s*a0,\s*a1
+** sltu\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** neg\s+[atx][0-9]+,\s*[atx][0-9]+
+** or\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** sext.w\s+a0,\s*a0
+** ret
+*/
+DEF_SAT_U_ADD_FMT_3(uint32_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_ADD " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_add-12.c b/gcc/testsuite/gcc.target/riscv/sat_u_add-12.c
new file mode 100644
index 0000000..27b13a7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_add-12.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_add_uint64_t_fmt_3:
+** add\s+[atx][0-9]+,\s*a0,\s*a1
+** sltu\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** neg\s+[atx][0-9]+,\s*[atx][0-9]+
+** or\s+a0,\s*[atx][0-9]+,\s*[atx][0-9]+
+** ret
+*/
+DEF_SAT_U_ADD_FMT_3(uint64_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_ADD " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_add-9.c b/gcc/testsuite/gcc.target/riscv/sat_u_add-9.c
new file mode 100644
index 0000000..eac6707
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_add-9.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_add_uint8_t_fmt_3:
+** add\s+[atx][0-9]+,\s*a0,\s*a1
+** andi\s+[atx][0-9]+,\s*[atx][0-9]+,\s*0xff
+** sltu\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** neg\s+[atx][0-9]+,\s*[atx][0-9]+
+** or\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** andi\s+a0,\s*a0,\s*0xff
+** ret
+*/
+DEF_SAT_U_ADD_FMT_3(uint8_t)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_ADD " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_add-run-10.c b/gcc/testsuite/gcc.target/riscv/sat_u_add-run-10.c
new file mode 100644
index 0000000..bd935dc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_add-run-10.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_ADD_FMT_3
+
+DEF_SAT_U_ADD_FMT_3(T)
+
+T test_data[][3] = {
+  /* arg_0, arg_1, expect */
+  {      0,     0,      0, },
+  {      0,     1,      1, },
+  {      1,     1,      2, },
+  {      0, 65534,  65534, },
+  {      1, 65534,  65535, },
+  {      2, 65534,  65535, },
+  {      0, 65535,  65535, },
+  {      1, 65535,  65535, },
+  {      2, 65535,  65535, },
+  {  65535, 65535,  65535, },
+};
+
+#include "scalar_sat_binary.h"
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_add-run-11.c b/gcc/testsuite/gcc.target/riscv/sat_u_add-run-11.c
new file mode 100644
index 0000000..deccf9a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_add-run-11.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_ADD_FMT_3
+
+DEF_SAT_U_ADD_FMT_3(T)
+
+T test_data[][3] = {
+  /*     arg_0,      arg_1,      expect */
+  {          0,          0,           0, },
+  {          0,          1,           1, },
+  {          1,          1,           2, },
+  {          0, 4294967294,  4294967294, },
+  {          1, 4294967294,  4294967295, },
+  {          2, 4294967294,  4294967295, },
+  {          0, 4294967295,  4294967295, },
+  {          1, 4294967295,  4294967295, },
+  {          2, 4294967295,  4294967295, },
+  { 4294967295, 4294967295,  4294967295, },
+};
+
+#include "scalar_sat_binary.h"
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_add-run-12.c b/gcc/testsuite/gcc.target/riscv/sat_u_add-run-12.c
new file mode 100644
index 0000000..4f99367
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_add-run-12.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_ADD_FMT_3
+
+DEF_SAT_U_ADD_FMT_3(T)
+
+T test_data[][3] = {
+  /*                arg_0,                 arg_1,                 expect */
+  {                     0,                     0,                      0, },
+  {                     0,                     1,                      1, },
+  {                     1,                     1,                      2, },
+  {                     0, 18446744073709551614u,  18446744073709551614u, },
+  {                     1, 18446744073709551614u,  18446744073709551615u, },
+  {                     2, 18446744073709551614u,  18446744073709551615u, },
+  {                     0, 18446744073709551615u,  18446744073709551615u, },
+  {                     1, 18446744073709551615u,  18446744073709551615u, },
+  {                     2, 18446744073709551615u,  18446744073709551615u, },
+  { 18446744073709551615u, 18446744073709551615u,  18446744073709551615u, },
+};
+
+#include "scalar_sat_binary.h"
diff --git a/gcc/testsuite/gcc.target/riscv/sat_u_add-run-9.c b/gcc/testsuite/gcc.target/riscv/sat_u_add-run-9.c
new file mode 100644
index 0000000..670932f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_u_add-run-9.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_ADD_FMT_3
+
+DEF_SAT_U_ADD_FMT_3(T)
+
+T test_data[][3] = {
+  /* arg_0, arg_1, expect */
+  {      0,     0,      0, },
+  {      0,     1,      1, },
+  {      1,     1,      2, },
+  {      0,   254,    254, },
+  {      1,   254,    255, },
+  {      2,   254,    255, },
+  {      0,   255,    255, },
+  {      1,   255,    255, },
+  {      2,   255,    255, },
+  {    255,   255,    255, },
+};
+
+#include "scalar_sat_binary.h"