| /************************************************************************** |
| * |
| * 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 "lp_bld_intr.h" |
| #include "lp_bld_gather.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_vec_type; |
| LLVMValueRef ptr, res = NULL; |
| struct lp_type src_type; |
| boolean pure_integer = format_desc->channel[0].pure_integer; |
| struct lp_type tmp_type; |
| |
| lp_type_from_format_desc(&src_type, format_desc); |
| |
| assert(src_type.length <= dst_type.length); |
| |
| src_vec_type = lp_build_vec_type(gallivm, src_type); |
| |
| /* Read whole vector from memory, unaligned */ |
| ptr = LLVMBuildGEP(builder, base_ptr, &offset, 1, ""); |
| ptr = LLVMBuildPointerCast(builder, ptr, LLVMPointerType(src_vec_type, 0), ""); |
| res = LLVMBuildLoad(builder, ptr, ""); |
| LLVMSetAlignment(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, dst_type.length); |
| src_type.length = dst_type.length; |
| } |
| |
| tmp_type = dst_type; |
| if (pure_integer) { |
| /* some callers expect (fake) floats other real ints. */ |
| tmp_type.floating = 0; |
| tmp_type.sign = src_type.sign; |
| } |
| |
| /* Convert to correct format */ |
| lp_build_conv(gallivm, src_type, tmp_type, &res, 1, &res, 1); |
| |
| /* Swizzle it */ |
| lp_build_context_init(&bld, gallivm, tmp_type); |
| res = lp_build_format_swizzle_aos(format_desc, &bld, res); |
| |
| /* Bitcast to floats (for pure integers) when requested */ |
| if (pure_integer && dst_type.floating) { |
| res = LLVMBuildBitCast(builder, res, lp_build_vec_type(gallivm, dst_type), ""); |
| } |
| |
| return res; |
| } |