Support reduc_{plus,smax,smin,umax,min}_scal_v4hi.

gcc/ChangeLog:

	PR target/102494
	* config/i386/i386-expand.c (emit_reduc_half): Hanlde V4HImode.
	* config/i386/mmx.md (reduc_plus_scal_v4hi): New.
	(reduc_<code>_scal_v4hi): New.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/mmx-reduce-op-1.c: New test.
	* gcc.target/i386/mmx-reduce-op-2.c: New test.

2 files changed, 83 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/i386/mmx-reduce-op-1.c b/gcc/testsuite/gcc.target/i386/mmx-reduce-op-1.c
new file mode 100644
index 0000000..ac20ed0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mmx-reduce-op-1.c
@@ -0,0 +1,58 @@
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+/* { dg-final { scan-tree-dump-times "\.REDUC_PLUS" 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\.REDUC_MIN" 2 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "\.REDUC_MAX" 2 "optimized" } } */
+
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define MIN(a, b) ((a) > (b) ? (b) : (a))
+
+short
+__attribute__((noipa, optimize("Ofast"),target("sse2")))
+reduce_add (short* __restrict pa)
+{
+  short sum = 0;
+  for (int i = 0; i != 4; i++)
+    sum += pa[i];
+  return sum;
+}
+
+short
+__attribute__((noipa, optimize("Ofast"),target("sse2")))
+reduce_smax (short* __restrict pa)
+{
+  short sum = pa[0];
+  for (int i = 0; i != 4; i++)
+    sum = MAX(sum, pa[i]);
+  return sum;
+}
+
+short
+__attribute__((noipa, optimize("Ofast"),target("sse2")))
+reduce_smin (short* __restrict pa)
+{
+  short sum = pa[0];
+  for (int i = 0; i != 4; i++)
+    sum = MIN(sum, pa[i]);
+  return sum;
+}
+
+unsigned short
+__attribute__((noipa, optimize("Ofast"),target("sse4.1")))
+reduce_umax (unsigned short* __restrict pa)
+{
+  unsigned short sum = pa[0];
+  for (int i = 0; i != 4; i++)
+    sum = MAX(sum, pa[i]);
+  return sum;
+}
+
+unsigned short
+__attribute__((noipa, optimize("Ofast"),target("sse4.1")))
+reduce_umin (unsigned short* __restrict pa)
+{
+  unsigned short sum = pa[0];
+  for (int i = 0; i != 4; i++)
+    sum = MIN(sum, pa[i]);
+  return sum;
+}
diff --git a/gcc/testsuite/gcc.target/i386/mmx-reduce-op-2.c b/gcc/testsuite/gcc.target/i386/mmx-reduce-op-2.c
new file mode 100644
index 0000000..0896cd6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mmx-reduce-op-2.c
@@ -0,0 +1,25 @@
+/* { dg-do run { target { ! ia32 } } } */
+/* { dg-require-effective-target sse4 } */
+/* { dg-options "-O2 -msse4.1" } */
+
+#include "sse4_1-check.h"
+
+#include "mmx-reduce-op-1.c"
+
+static void
+sse4_1_test ()
+{
+  short p[4] = { -103, 23, 41, 200 };
+  unsigned short up[4] = { 100, 30, 299, 1000 };
+
+  if (reduce_add (p) != 161)
+    abort ();
+  if (reduce_smin (p) != -103)
+    abort ();
+  if (reduce_smax (p) != 200)
+    abort ();
+  if (reduce_umin (up) != 30)
+    abort ();
+  if (reduce_umax (up) != 1000)
+    abort();
+}