RISC-V: Add testcases for form 1 of scalar signed SAT_SUB

Form 1:
  #define DEF_SAT_S_SUB_FMT_1(T, UT, MIN, MAX) \
  T __attribute__((noinline))                  \
  sat_s_sub_##T##_fmt_1 (T x, T y)             \
  {                                            \
    T minus = (UT)x - (UT)y;                   \
    return (x ^ y) >= 0                        \
      ? minus                                  \
      : (minus ^ x) >= 0                       \
        ? minus                                \
        : x < 0 ? MIN : MAX;                   \
  }

DEF_SAT_S_SUB_FMT_1(int8_t, uint8_t, INT8_MIN, INT8_MAX)

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/sat_arith.h: Add test helper macros.
	* gcc.target/riscv/sat_arith_data.h: Add test data for SAT_SUB.
	* gcc.target/riscv/sat_s_sub-1-i16.c: New test.
	* gcc.target/riscv/sat_s_sub-1-i32.c: New test.
	* gcc.target/riscv/sat_s_sub-1-i64.c: New test.
	* gcc.target/riscv/sat_s_sub-1-i8.c: New test.
	* gcc.target/riscv/sat_s_sub-run-1-i16.c: New test.
	* gcc.target/riscv/sat_s_sub-run-1-i32.c: New test.
	* gcc.target/riscv/sat_s_sub-run-1-i64.c: New test.
	* gcc.target/riscv/sat_s_sub-run-1-i8.c: New test.

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

10 files changed, 267 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/riscv/sat_arith.h b/gcc/testsuite/gcc.target/riscv/sat_arith.h
index a2617b6..587f3f8 100644
--- a/gcc/testsuite/gcc.target/riscv/sat_arith.h
+++ b/gcc/testsuite/gcc.target/riscv/sat_arith.h
@@ -353,6 +353,23 @@ sat_u_sub_imm_type_check##_##INDEX##_##T##_fmt_4 (T x)    \
   return x > IMM ? x - IMM : 0;                           \
 }
 
+#define DEF_SAT_S_SUB_FMT_1(T, UT, MIN, MAX) \
+T __attribute__((noinline))                  \
+sat_s_sub_##T##_fmt_1 (T x, T y)             \
+{                                            \
+  T minus = (UT)x - (UT)y;                   \
+  return (x ^ y) >= 0                        \
+    ? minus                                  \
+    : (minus ^ x) >= 0                       \
+      ? minus                                \
+      : x < 0 ? MIN : MAX;                   \
+}
+#define DEF_SAT_S_SUB_FMT_1_WRAP(T, UT, MIN, MAX) \
+  DEF_SAT_S_SUB_FMT_1(T, UT, MIN, MAX)
+
+#define RUN_SAT_S_SUB_FMT_1(T, x, y) sat_s_sub_##T##_fmt_1(x, y)
+#define RUN_SAT_S_SUB_FMT_1_WRAP(T, x, y) RUN_SAT_S_SUB_FMT_1(T, x, y)
+
 /******************************************************************************/
 /* Saturation Truncate (unsigned and signed)                                  */
 /******************************************************************************/
diff --git a/gcc/testsuite/gcc.target/riscv/sat_arith_data.h b/gcc/testsuite/gcc.target/riscv/sat_arith_data.h
index 75037c5..39a1e17 100644
--- a/gcc/testsuite/gcc.target/riscv/sat_arith_data.h
+++ b/gcc/testsuite/gcc.target/riscv/sat_arith_data.h
@@ -37,6 +37,11 @@ TEST_BINARY_STRUCT (int16_t, ssadd)
 TEST_BINARY_STRUCT (int32_t, ssadd)
 TEST_BINARY_STRUCT (int64_t, ssadd)
 
+TEST_BINARY_STRUCT (int8_t,  sssub)
+TEST_BINARY_STRUCT (int16_t, sssub)
+TEST_BINARY_STRUCT (int32_t, sssub)
+TEST_BINARY_STRUCT (int64_t, sssub)
+
 TEST_UNARY_STRUCT_DECL(uint8_t, uint16_t) \
   TEST_UNARY_DATA(uint8_t, uint16_t)[] =
 {
@@ -189,4 +194,72 @@ TEST_BINARY_STRUCT_DECL(int64_t, ssadd) TEST_BINARY_DATA(int64_t, ssadd)[] =
   { -9223372036854775803ll,   9223372036854775805ll,                       2},
 };
 
+TEST_BINARY_STRUCT_DECL(int8_t, sssub) TEST_BINARY_DATA(int8_t, sssub)[] =
+{
+  {   0,    0,    0},
+  {   2,    4,   -2},
+  { 126,   -1,  127},
+  { 127,   -1,  127},
+  { 127, -127,  127},
+  {  -7,   -4,   -3},
+  {-127,    1, -128},
+  {-128,    1, -128},
+  {-128,  127, -128},
+  {-128, -127,   -1},
+  {-124, -127,    3},
+  {-125, -120,   -5},
+  { 126,  120,    6},
+};
+
+TEST_BINARY_STRUCT_DECL(int16_t, sssub) TEST_BINARY_DATA(int16_t, sssub)[] =
+{
+  {     0,      0,      0},
+  {     2,      4,     -2},
+  { 32766,     -1,  32767},
+  { 32767,     -1,  32767},
+  { 32767, -32767,  32767},
+  {    -7,     -4,     -3},
+  {-32767,      1, -32768},
+  {-32768,      1, -32768},
+  {-32768,  32767, -32768},
+  {-32768, -32767,     -1},
+  {-32764, -32767,      3},
+  {-32765, -32760,     -5},
+  { 32766,  32760,      6},
+};
+
+TEST_BINARY_STRUCT_DECL(int32_t, sssub) TEST_BINARY_DATA(int32_t, sssub)[] =
+{
+  {          0,           0,           0},
+  {          2,           4,          -2},
+  { 2147483646,          -1,  2147483647},
+  { 2147483647,          -1,  2147483647},
+  { 2147483647, -2147483647,  2147483647},
+  {         -7,          -4,          -3},
+  {-2147483647,           1, -2147483648},
+  {-2147483648,           1, -2147483648},
+  {-2147483648,  2147483647, -2147483648},
+  {-2147483648, -2147483647,          -1},
+  {-2147483644, -2147483647,           3},
+  {-2147483645, -2147483640,          -5},
+  { 2147483646,  2147483640,           6},
+};
+
+TEST_BINARY_STRUCT_DECL(int64_t, sssub) TEST_BINARY_DATA(int64_t, sssub)[] =
+{
+  {                      0,                       0,                       0},
+  {                      2,                       4,                      -2},
+  {  9223372036854775806ll,                      -1,   9223372036854775807ll},
+  {  9223372036854775807ll,                      -1,   9223372036854775807ll},
+  {  9223372036854775807ll,  -9223372036854775807ll,   9223372036854775807ll},
+  {                     -7,                      -4,                      -3},
+  { -9223372036854775807ll,                       1, -9223372036854775808ull},
+  {-9223372036854775808ull,                       1, -9223372036854775808ull},
+  {-9223372036854775808ull,   9223372036854775807ll, -9223372036854775808ull},
+  {-9223372036854775808ull,  -9223372036854775807ll,                      -1},
+  { -9223372036854775804ll,  -9223372036854775807ll,                       3},
+  { -9223372036854775805ll,  -9223372036854775800ll,                      -5},
+  {  9223372036854775806ll,   9223372036854775800ll,                       6},
+};
+
 #endif
diff --git a/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i16.c b/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i16.c
new file mode 100644
index 0000000..a171837
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i16.c
@@ -0,0 +1,30 @@
+/* { 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_s_sub_int16_t_fmt_1:
+** sub\s+[atx][0-9]+,\s*a0,\s*a1
+** xor\s+[atx][0-9]+,\s*a0,\s*a1
+** xor\s+[atx][0-9]+,\s*a0,\s*[atx][0-9]+
+** and\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** srli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*15
+** andi\s+[atx][0-9]+,\s*[atx][0-9]+,\s*1
+** srai\s+[atx][0-9]+,\s*[atx][0-9]+,\s*63
+** li\s+[atx][0-9]+,\s*32768
+** addi\s+[atx][0-9]+,\s*[atx][0-9]+,\s*-1
+** xor\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** neg\s+[atx][0-9]+,\s*[atx][0-9]+
+** and\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+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** or\s+a0,\s*[atx][0-9]+,\s*[atx][0-9]+
+** slliw\s+a0,\s*a0,\s*16
+** sraiw\s+a0,\s*a0,\s*16
+** ret
+*/
+DEF_SAT_S_SUB_FMT_1(int16_t, uint16_t, INT16_MIN, INT16_MAX)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i32.c b/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i32.c
new file mode 100644
index 0000000..c1d9e44
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i32.c
@@ -0,0 +1,28 @@
+/* { 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_s_sub_int32_t_fmt_1:
+** sub\s+[atx][0-9]+,\s*a0,\s*a1
+** xor\s+[atx][0-9]+,\s*a0,\s*a1
+** xor\s+[atx][0-9]+,\s*a0,\s*[atx][0-9]+
+** and\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** srliw\s+[atx][0-9]+,\s*[atx][0-9]+,\s*31
+** srai\s+[atx][0-9]+,\s*[atx][0-9]+,\s*63
+** li\s+[atx][0-9]+,\s*-2147483648
+** xori\s+[atx][0-9]+,\s*[atx][0-9]+,\s*-1
+** xor\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-7]
+** neg\s+[atx][0-9]+,\s*[atx][0-9]+
+** and\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+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** or\s+a0,\s*[atx][0-9]+,\s*[atx][0-9]+
+** sext\.w\s+a0,\s*[atx][0-9]+
+** ret
+*/
+DEF_SAT_S_SUB_FMT_1(int32_t, uint32_t, INT32_MIN, INT32_MAX)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i64.c b/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i64.c
new file mode 100644
index 0000000..d072908
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i64.c
@@ -0,0 +1,27 @@
+/* { 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_s_sub_int64_t_fmt_1:
+** sub\s+[atx][0-9]+,\s*a0,\s*a1
+** xor\s+[atx][0-9]+,\s*a0,\s*a1
+** xor\s+[atx][0-9]+,\s*a0,\s*[atx][0-9]+
+** and\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** srli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*63
+** srai\s+[atx][0-9]+,\s*[atx][0-9]+,\s*63
+** li\s+[atx][0-9]+,\s*-1
+** srli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*1
+** xor\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** neg\s+[atx][0-9]+,\s*[atx][0-9]+
+** and\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+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** or\s+a0,\s*[atx][0-9]+,\s*[atx][0-9]+
+** ret
+*/
+DEF_SAT_S_SUB_FMT_1(int64_t, uint64_t, INT64_MIN, INT64_MAX)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i8.c b/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i8.c
new file mode 100644
index 0000000..bd7d298
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_s_sub-1-i8.c
@@ -0,0 +1,28 @@
+/* { 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_s_sub_int8_t_fmt_1:
+** sub\s+[atx][0-9]+,\s*a0,\s*a1
+** xor\s+[atx][0-9]+,\s*a0,\s*a1
+** xor\s+[atx][0-9]+,\s*a0,\s*[atx][0-9]+
+** and\s+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** srli\s+[atx][0-9]+,\s*[atx][0-9]+,\s*7
+** andi\s+[atx][0-9]+,\s*[atx][0-9]+,\s*1
+** srai\s+[atx][0-9]+,\s*[atx][0-9]+,\s*63
+** xori\s+[atx][0-9]+,\s*[atx][0-9]+,\s*127
+** neg\s+[atx][0-9]+,\s*[atx][0-9]+
+** and\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+[atx][0-9]+,\s*[atx][0-9]+,\s*[atx][0-9]+
+** or\s+a0,\s*[atx][0-9]+,\s*[atx][0-9]+
+** slliw\s+a0,\s*a0,\s*24
+** sraiw\s+a0,\s*a0,\s*24
+** ret
+*/
+DEF_SAT_S_SUB_FMT_1(int8_t, uint8_t, INT8_MIN, INT8_MAX)
+
+/* { dg-final { scan-rtl-dump-times ".SAT_SUB " 2 "expand" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i16.c b/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i16.c
new file mode 100644
index 0000000..e248b73
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i16.c
@@ -0,0 +1,16 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "sat_arith.h"
+#include "sat_arith_data.h"
+
+#define T1 int16_t
+#define T2 uint16_t
+
+DEF_SAT_S_SUB_FMT_1_WRAP(T1, T2, INT16_MIN, INT16_MAX)
+
+#define DATA             TEST_BINARY_DATA_WRAP(T1, sssub)
+#define T                TEST_BINARY_STRUCT_DECL(T1, sssub)
+#define RUN_BINARY(x, y) RUN_SAT_S_SUB_FMT_1_WRAP(T1, x, y)
+
+#include "scalar_sat_binary_run_xxx.h"
diff --git a/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i32.c b/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i32.c
new file mode 100644
index 0000000..bebb4be
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i32.c
@@ -0,0 +1,16 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "sat_arith.h"
+#include "sat_arith_data.h"
+
+#define T1 int32_t
+#define T2 uint32_t
+
+DEF_SAT_S_SUB_FMT_1_WRAP(T1, T2, INT32_MIN, INT32_MAX)
+
+#define DATA             TEST_BINARY_DATA_WRAP(T1, sssub)
+#define T                TEST_BINARY_STRUCT_DECL(T1, sssub)
+#define RUN_BINARY(x, y) RUN_SAT_S_SUB_FMT_1_WRAP(T1, x, y)
+
+#include "scalar_sat_binary_run_xxx.h"
diff --git a/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i64.c b/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i64.c
new file mode 100644
index 0000000..f31eb29
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i64.c
@@ -0,0 +1,16 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "sat_arith.h"
+#include "sat_arith_data.h"
+
+#define T1 int64_t
+#define T2 uint64_t
+
+DEF_SAT_S_SUB_FMT_1_WRAP(T1, T2, INT64_MIN, INT64_MAX)
+
+#define DATA             TEST_BINARY_DATA_WRAP(T1, sssub)
+#define T                TEST_BINARY_STRUCT_DECL(T1, sssub)
+#define RUN_BINARY(x, y) RUN_SAT_S_SUB_FMT_1_WRAP(T1, x, y)
+
+#include "scalar_sat_binary_run_xxx.h"
diff --git a/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i8.c b/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i8.c
new file mode 100644
index 0000000..e165e39
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/sat_s_sub-run-1-i8.c
@@ -0,0 +1,16 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "-std=c99" } */
+
+#include "sat_arith.h"
+#include "sat_arith_data.h"
+
+#define T1 int8_t
+#define T2 uint8_t
+
+DEF_SAT_S_SUB_FMT_1_WRAP(T1, T2, INT8_MIN, INT8_MAX)
+
+#define DATA             TEST_BINARY_DATA_WRAP(T1, sssub)
+#define T                TEST_BINARY_STRUCT_DECL(T1, sssub)
+#define RUN_BINARY(x, y) RUN_SAT_S_SUB_FMT_1_WRAP(T1, x, y)
+
+#include "scalar_sat_binary_run_xxx.h"