1 files changed, 102 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_format_aos_array.c b/src/gallium/auxiliary/gallivm/lp_bld_format_aos_array.c
new file mode 100644
index 00000000000..b8ec379d76f
--- /dev/null
+++ b/src/gallium/auxiliary/gallivm/lp_bld_format_aos_array.c
@@ -0,0 +1,102 @@
+/**************************************************************************
+ *
+ * Copyright 2012 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+#include "lp_bld_const.h"
+#include "lp_bld_struct.h"
+#include "lp_bld_format.h"
+#include "lp_bld_debug.h"
+#include "lp_bld_type.h"
+#include "lp_bld_conv.h"
+#include "lp_bld_pack.h"
+
+#include "util/u_memory.h"
+#include "util/u_format.h"
+#include "pipe/p_state.h"
+
+/**
+ * @brief lp_build_fetch_rgba_aos_array
+ *
+ * \param format_desc   describes format of the image we're fetching from
+ * \param dst_type      output type
+ * \param base_ptr      address of the pixel block (or the texel if uncompressed)
+ * \param offset        ptr offset
+ */
+LLVMValueRef
+lp_build_fetch_rgba_aos_array(struct gallivm_state *gallivm,
+                              const struct util_format_description *format_desc,
+                              struct lp_type dst_type,
+                              LLVMValueRef base_ptr,
+                              LLVMValueRef offset)
+{
+   struct lp_build_context bld;
+   LLVMBuilderRef builder = gallivm->builder;
+   LLVMTypeRef src_elem_type, src_vec_type;
+   LLVMValueRef ptr, res = NULL;
+   struct lp_type src_type;
+
+   memset(&src_type, 0, sizeof src_type);
+   src_type.floating = format_desc->channel[0].type == UTIL_FORMAT_TYPE_FLOAT;
+   src_type.fixed    = format_desc->channel[0].type == UTIL_FORMAT_TYPE_FIXED;
+   src_type.sign     = format_desc->channel[0].type != UTIL_FORMAT_TYPE_UNSIGNED;
+   src_type.norm     = format_desc->channel[0].normalized;
+   src_type.width    = format_desc->channel[0].size;
+   src_type.length   = format_desc->nr_channels;
+
+   assert(src_type.length <= dst_type.length);
+
+   src_elem_type = lp_build_elem_type(gallivm, src_type);
+   src_vec_type  = lp_build_vec_type(gallivm,  src_type);
+
+   /* Read whole vector from memory, unaligned */
+   if (!res) {
+      ptr = LLVMBuildGEP(builder, base_ptr, &offset, 1, "");
+      ptr = LLVMBuildPointerCast(builder, ptr, LLVMPointerType(src_vec_type, 0), "");
+      res = LLVMBuildLoad(builder, ptr, "");
+      lp_set_load_alignment(res, src_type.width / 8);
+   }
+
+   /* Truncate doubles to float */
+   if (src_type.floating && src_type.width == 64) {
+      src_type.width = 32;
+      src_vec_type  = lp_build_vec_type(gallivm,  src_type);
+
+      res = LLVMBuildFPTrunc(builder, res, src_vec_type, "");
+   }
+
+   /* Expand to correct length */
+   if (src_type.length < dst_type.length) {
+      res = lp_build_pad_vector(gallivm, res, src_type, dst_type.length);
+      src_type.length = dst_type.length;
+   }
+
+   /* Convert to correct format */
+   lp_build_conv(gallivm, src_type, dst_type, &res, 1, &res, 1);
+
+   /* Swizzle it */
+   lp_build_context_init(&bld, gallivm, dst_type);
+   return lp_build_format_swizzle_aos(format_desc, &bld, res);
+}