testsuite/arm: Add mve-vmul-scalar-1.c test

Support for vmul has been present for a while, but it was lacking a
test for the scalar variant.

This patch adds one, precisely noting that we do not yet use the T2
variants of vmul, which take a scalar as final argument.

2021-05-10  Christophe Lyon  <christophe.lyon@linaro.org>

	gcc/testsuite/
	* gcc.target/arm/simd/mve-vmul-scalar-1.c: New.

1 files changed, 60 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/arm/simd/mve-vmul-scalar-1.c b/gcc/testsuite/gcc.target/arm/simd/mve-vmul-scalar-1.c
new file mode 100644
index 0000000..22be452
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/simd/mve-vmul-scalar-1.c
@@ -0,0 +1,60 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_v8_1m_mve_fp_ok } */
+/* { dg-add-options arm_v8_1m_mve_fp } */
+/* { dg-additional-options "-O3" } */
+
+#include <stdint.h>
+
+#define FUNC_IMM(SIGN, TYPE, BITS, NB, OP, NAME)			\
+  void test_ ## NAME ##_ ## SIGN ## BITS ## x ## NB (TYPE##BITS##_t * __restrict__ dest, \
+						     TYPE##BITS##_t *a) { \
+    int i;								\
+    for (i=0; i<NB; i++) {						\
+      dest[i] = a[i] OP 5;						\
+    }									\
+}
+
+/* 128-bit vectors.  */
+FUNC_IMM(s, int, 32, 4, *, vmulimm)
+FUNC_IMM(u, uint, 32, 4, *, vmulimm)
+FUNC_IMM(s, int, 16, 8, *, vmulimm)
+FUNC_IMM(u, uint, 16, 8, *, vmulimm)
+FUNC_IMM(s, int, 8, 16, *, vmulimm)
+FUNC_IMM(u, uint, 8, 16, *, vmulimm)
+
+/* For the moment we do not select the T2 vmul variant operating on a scalar
+   final argument.  */
+/* { dg-final { scan-assembler-times {vmul\.i32\tq[0-9]+, q[0-9]+, r[0-9]+} 2 { xfail *-*-* } } } */
+/* { dg-final { scan-assembler-times {vmul\.i16\tq[0-9]+, q[0-9]+, r[0-9]+} 2 { xfail *-*-* } } } */
+/* { dg-final { scan-assembler-times {vmul\.i8\tq[0-9]+, q[0-9]+, r[0-9]+} 2 { xfail *-*-* } } } */
+
+void test_vmul_f32 (float * dest, float * a, float * b) {
+  int i;
+  for (i=0; i<4; i++) {
+    dest[i] = a[i] * b[1];
+  }
+}
+void test_vmulimm_f32 (float * dest, float * a) {
+  int i;
+  for (i=0; i<4; i++) {
+    dest[i] = a[i] * 5.0;
+  }
+}
+/* { dg-final { scan-assembler-times {vmul\.f32\tq[0-9]+, q[0-9]+, r[0-9]+} 2 { xfail *-*-* } } } */
+
+void test_vmul_f16 (__fp16 * dest, __fp16 * a, __fp16 * b) {
+  int i;
+  for (i=0; i<8; i++) {
+    dest[i] = a[i] * b[i];
+  }
+}
+
+/* Note that dest[i] = a[i] * 5.0f16 is not vectorized.  */
+void test_vmulimm_f16 (__fp16 * dest, __fp16 * a) {
+  int i;
+  __fp16 b = 5.0f16;
+  for (i=0; i<8; i++) {
+    dest[i] = a[i] * b;
+  }
+}
+/* { dg-final { scan-assembler-times {vmul\.f16\tq[0-9]+, q[0-9]+, r[0-9]+} 2 { xfail *-*-* } } } */