[Patch ARM-AArch64/testsuite Neon intrinsics 10/20] Add vrsqrts tests.

[Christophe Lyon <christophe.lyon@linaro.org>]

diff --git a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vrsqrts.c b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vrsqrts.c
new file mode 100644
index 0000000..4531026
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vrsqrts.c
@@ -0,0 +1,118 @@
+#include <arm_neon.h>
+#include "arm-neon-ref.h"
+#include "compute-ref-data.h"
+#include <math.h>
+
+/* Expected results.  */
+VECT_VAR_DECL(expected,hfloat,32,2) [] = { 0xc2796b84, 0xc2796b84 };
+VECT_VAR_DECL(expected,hfloat,32,4) [] = { 0xc0e4a3d8, 0xc0e4a3d8,
+					   0xc0e4a3d8, 0xc0e4a3d8 };
+
+/* Expected results with input=NaN.  */
+VECT_VAR_DECL(expected_nan,hfloat,32,2) [] = { 0x7fc00000, 0x7fc00000 };
+VECT_VAR_DECL(expected_nan,hfloat,32,4) [] = { 0x7fc00000, 0x7fc00000,
+					       0x7fc00000, 0x7fc00000 };
+
+/* Expected results with FP special inputs values (infinity, 0).  */
+VECT_VAR_DECL(expected_fp1,hfloat,32,2) [] = { 0xff800000, 0xff800000 };
+VECT_VAR_DECL(expected_fp1,hfloat,32,4) [] = { 0x3fc00000, 0x3fc00000,
+					       0x3fc00000, 0x3fc00000 };
+
+/* Expected results with only FP special inputs values (infinity,
+   0).  */
+VECT_VAR_DECL(expected_fp2,hfloat,32,2) [] = { 0x3fc00000, 0x3fc00000 };
+VECT_VAR_DECL(expected_fp2,hfloat,32,4) [] = { 0x3fc00000, 0x3fc00000,
+					       0x3fc00000, 0x3fc00000 };
+
+#define TEST_MSG "VRSQRTS/VRSQRTSQ"
+void exec_vrsqrts(void)
+{
+  int i;
+
+  /* Basic test: y=vrsqrts(x), then store the result.  */
+#define TEST_VRSQRTS(Q, T1, T2, W, N)			\
+  VECT_VAR(vector_res, T1, W, N) =			\
+    vrsqrts##Q##_##T2##W(VECT_VAR(vector, T1, W, N),	\
+			 VECT_VAR(vector2, T1, W, N));	\
+  vst1##Q##_##T2##W(VECT_VAR(result, T1, W, N),		\
+		    VECT_VAR(vector_res, T1, W, N))
+
+  /* No need for integer variants.  */
+  DECL_VARIABLE(vector, float, 32, 2);
+  DECL_VARIABLE(vector, float, 32, 4);
+
+  DECL_VARIABLE(vector2, float, 32, 2);
+  DECL_VARIABLE(vector2, float, 32, 4);
+
+  DECL_VARIABLE(vector_res, float, 32, 2);
+  DECL_VARIABLE(vector_res, float, 32, 4);
+
+  clean_results ();
+
+  /* Choose init value arbitrarily.  */
+  VDUP(vector, , float, f, 32, 2, 12.9f);
+  VDUP(vector, q, float, f, 32, 4, 9.1f);
+
+  VDUP(vector2, , float, f, 32, 2, 9.9f);
+  VDUP(vector2, q, float, f, 32, 4, 1.9f);
+
+  /* Apply the operator.  */
+  TEST_VRSQRTS(, float, f, 32, 2);
+  TEST_VRSQRTS(q, float, f, 32, 4);
+
+#define CMT ""
+  CHECK_FP(TEST_MSG, float, 32, 2, PRIx32, expected, CMT);
+  CHECK_FP(TEST_MSG, float, 32, 4, PRIx32, expected, CMT);
+
+
+  /* Test FP variants with special input values (NaN).  */
+  VDUP(vector, , float, f, 32, 2, NAN);
+  VDUP(vector2, q, float, f, 32, 4, NAN);
+
+  /* Apply the operator.  */
+  TEST_VRSQRTS(, float, f, 32, 2);
+  TEST_VRSQRTS(q, float, f, 32, 4);
+
+#undef CMT
+#define CMT " FP special (NAN) and normal values"
+  CHECK_FP(TEST_MSG, float, 32, 2, PRIx32, expected_nan, CMT);
+  CHECK_FP(TEST_MSG, float, 32, 4, PRIx32, expected_nan, CMT);
+
+
+  /* Test FP variants with special input values (infinity, 0).  */
+  VDUP(vector, , float, f, 32, 2, HUGE_VALF);
+  VDUP(vector, q, float, f, 32, 4, 0.0f);
+  /* Restore a normal value in vector2.  */
+  VDUP(vector2, q, float, f, 32, 4, 3.2f);
+
+  /* Apply the operator.  */
+  TEST_VRSQRTS(, float, f, 32, 2);
+  TEST_VRSQRTS(q, float, f, 32, 4);
+
+#undef CMT
+#define CMT " FP special (infinity, 0) and normal values"
+  CHECK_FP(TEST_MSG, float, 32, 2, PRIx32, expected_fp1, CMT);
+  CHECK_FP(TEST_MSG, float, 32, 4, PRIx32, expected_fp1, CMT);
+
+
+  /* Test FP variants with only special input values (infinity, 0).  */
+  VDUP(vector, , float, f, 32, 2, HUGE_VALF);
+  VDUP(vector, q, float, f, 32, 4, 0.0f);
+  VDUP(vector2, , float, f, 32, 2, -0.0f);
+  VDUP(vector2, q, float, f, 32, 4, HUGE_VALF);
+
+  /* Apply the operator.  */
+  TEST_VRSQRTS(, float, f, 32, 2);
+  TEST_VRSQRTS(q, float, f, 32, 4);
+
+#undef CMT
+#define CMT " only FP special (infinity, 0)"
+  CHECK_FP(TEST_MSG, float, 32, 2, PRIx32, expected_fp2, CMT);
+  CHECK_FP(TEST_MSG, float, 32, 4, PRIx32, expected_fp2, CMT);
+}
+
+int main (void)
+{
+  exec_vrsqrts ();
+  return 0;
+}
-- 
2.1.4