From a1011d63ffb5cc4f41bf0f4622ee3f1493d419d9 Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Sat, 29 Nov 2014 12:40:08 +0100
Subject: fontconfig libX11 libxcb libxcb/xcb-proto mesa xserver xkbcomp
 xkeyboard-config git update 29 Nov 2014

xserver          commit c52a2b1ebad56820af932dfbc871701a8b04fd9c
libxcb           commit bbca7b82f803fa13fd30a2891ec06f2a213a28c2
libxcb/xcb-proto commit 691d2b97e5989d6d7006304d81bd8fa128477ca1
xkeyboard-config commit b664d7fb8aab9b0f834dd9c81d273c7809561b34
libX11           commit f3831dde6972e4da9e018c6a5f4013d8756a5e78
xkbcomp          commit 1e8ee9d0aad072f04186df84752f5636340574e0
fontconfig       commit b732bf057f4b3ec3bac539803005e9c42d056b2a
mesa             commit 67c498086d0858a94d53ebb6921cfda847250368
---
 mesalib/src/mesa/main/sse_minmax.c | 97 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 mesalib/src/mesa/main/sse_minmax.c

(limited to 'mesalib/src/mesa/main/sse_minmax.c')

diff --git a/mesalib/src/mesa/main/sse_minmax.c b/mesalib/src/mesa/main/sse_minmax.c
new file mode 100644
index 000000000..222ac1454
--- /dev/null
+++ b/mesalib/src/mesa/main/sse_minmax.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright © 2014 Timothy Arceri
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Author:
+ *    Timothy Arceri <t_arceri@yahoo.com.au>
+ *
+ */
+
+#ifdef __SSE4_1__
+#include "main/sse_minmax.h"
+#include <smmintrin.h>
+#include <stdint.h>
+
+void
+_mesa_uint_array_min_max(const unsigned *ui_indices, unsigned *min_index,
+                         unsigned *max_index, const unsigned count)
+{
+   unsigned max_ui = 0;
+   unsigned min_ui = ~0U;
+   unsigned i = 0;
+   unsigned aligned_count = count;
+
+   /* handle the first few values without SSE until the pointer is aligned */
+   while (((uintptr_t)ui_indices & 15) && aligned_count) {
+      if (*ui_indices > max_ui)
+         max_ui = *ui_indices;
+      if (*ui_indices < min_ui)
+         min_ui = *ui_indices;
+
+      aligned_count--;
+      ui_indices++;
+   }
+
+   /* TODO: The actual threshold for SSE begin useful may be higher than 8.
+    * Some careful microbenchmarks and measurement are required to
+    * find the actual tipping point.
+    */
+   if (aligned_count >= 8) {
+      unsigned max_arr[4] __attribute__ ((aligned (16)));
+      unsigned min_arr[4] __attribute__ ((aligned (16)));
+      unsigned vec_count;
+      __m128i max_ui4 = _mm_setzero_si128();
+      __m128i min_ui4 = _mm_set1_epi32(~0U);
+      __m128i ui_indices4;
+      __m128i *ui_indices_ptr;
+
+      vec_count = aligned_count & ~0x3;
+      ui_indices_ptr = (__m128i *)ui_indices;
+      for (i = 0; i < vec_count / 4; i++) {
+         ui_indices4 = _mm_load_si128(&ui_indices_ptr[i]);
+         max_ui4 = _mm_max_epu32(ui_indices4, max_ui4);
+         min_ui4 = _mm_min_epu32(ui_indices4, min_ui4);
+      }
+
+      _mm_store_si128((__m128i *)max_arr, max_ui4);
+      _mm_store_si128((__m128i *)min_arr, min_ui4);
+
+      for (i = 0; i < 4; i++) {
+         if (max_arr[i] > max_ui)
+            max_ui = max_arr[i];
+         if (min_arr[i] < min_ui)
+            min_ui = min_arr[i];
+      }
+      i = vec_count;
+   }
+
+   for (; i < aligned_count; i++) {
+      if (ui_indices[i] > max_ui)
+         max_ui = ui_indices[i];
+      if (ui_indices[i] < min_ui)
+         min_ui = ui_indices[i];
+   }
+
+   *min_index = min_ui;
+   *max_index = max_ui;
+}
+
+#endif
-- 
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