1 files changed, 112 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_tiling_lt.c b/src/gallium/drivers/vc4/vc4_tiling_lt.c
new file mode 100644
index 00000000000..41237801cdb
--- /dev/null
+++ b/src/gallium/drivers/vc4/vc4_tiling_lt.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright © 2017 Broadcom
+ *
+ * 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.
+ */
+
+/** @file vc4_tiling_lt.c
+ *
+ * Helper functions from vc4_tiling.c that will be compiled for using NEON
+ * assembly or not.
+ */
+
+#include <string.h>
+#include "pipe/p_state.h"
+#include "vc4_tiling.h"
+
+/** Returns the stride in bytes of a 64-byte microtile. */
+static uint32_t
+vc4_utile_stride(int cpp)
+{
+        switch (cpp) {
+        case 1:
+                return 8;
+        case 2:
+        case 4:
+        case 8:
+                return 16;
+        default:
+                unreachable("bad cpp");
+        }
+}
+
+static void
+vc4_load_utile(void *dst, void *src, uint32_t dst_stride, uint32_t cpp)
+{
+        uint32_t src_stride = vc4_utile_stride(cpp);
+
+        for (uint32_t src_offset = 0; src_offset < 64; src_offset += src_stride) {
+                memcpy(dst, src + src_offset, src_stride);
+                dst += dst_stride;
+        }
+}
+
+static void
+vc4_store_utile(void *dst, void *src, uint32_t src_stride, uint32_t cpp)
+{
+        uint32_t dst_stride = vc4_utile_stride(cpp);
+
+        for (uint32_t dst_offset = 0; dst_offset < 64; dst_offset += dst_stride) {
+                memcpy(dst + dst_offset, src, dst_stride);
+                src += src_stride;
+        }
+}
+
+void
+vc4_load_lt_image(void *dst, uint32_t dst_stride,
+                  void *src, uint32_t src_stride,
+                  int cpp, const struct pipe_box *box)
+{
+        uint32_t utile_w = vc4_utile_width(cpp);
+        uint32_t utile_h = vc4_utile_height(cpp);
+        uint32_t xstart = box->x;
+        uint32_t ystart = box->y;
+
+        for (uint32_t y = 0; y < box->height; y += utile_h) {
+                for (int x = 0; x < box->width; x += utile_w) {
+                        vc4_load_utile(dst + (dst_stride * y +
+                                              x * cpp),
+                                       src + ((ystart + y) * src_stride +
+                                              (xstart + x) * 64 / utile_w),
+                                       dst_stride, cpp);
+                }
+        }
+}
+
+void
+vc4_store_lt_image(void *dst, uint32_t dst_stride,
+                   void *src, uint32_t src_stride,
+                   int cpp, const struct pipe_box *box)
+{
+        uint32_t utile_w = vc4_utile_width(cpp);
+        uint32_t utile_h = vc4_utile_height(cpp);
+        uint32_t xstart = box->x;
+        uint32_t ystart = box->y;
+
+        for (uint32_t y = 0; y < box->height; y += utile_h) {
+                for (int x = 0; x < box->width; x += utile_w) {
+                        vc4_store_utile(dst + ((ystart + y) * dst_stride +
+                                               (xstart + x) * 64 / utile_w),
+                                        src + (src_stride * y +
+                                               x * cpp),
+                                        src_stride, cpp);
+                }
+        }
+}