1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
29 #include "util/u_format.h"
31 #include "lp_bld_format.h"
35 lp_build_pack_rgba(LLVMBuilderRef builder,
36 enum pipe_format format,
39 const struct util_format_description *desc;
41 LLVMValueRef packed = NULL;
42 LLVMValueRef swizzles[4];
43 LLVMValueRef shifted, casted, scaled, unswizzled;
44 LLVMValueRef shifts[4];
45 LLVMValueRef scales[4];
50 desc = util_format_description(format);
52 assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH);
53 assert(desc->block.width == 1);
54 assert(desc->block.height == 1);
56 type = LLVMIntType(desc->block.bits);
58 /* Unswizzle the color components into the source vector. */
59 for (i = 0; i < 4; ++i) {
60 for (j = 0; j < 4; ++j) {
61 if (desc->swizzle[j] == i)
65 swizzles[i] = LLVMConstInt(LLVMInt32Type(), j, 0);
67 swizzles[i] = LLVMGetUndef(LLVMInt32Type());
70 unswizzled = LLVMBuildShuffleVector(builder, rgba,
71 LLVMGetUndef(LLVMVectorType(LLVMFloatType(), 4)),
72 LLVMConstVector(swizzles, 4), "");
76 for (i = 0; i < 4; ++i) {
77 unsigned bits = desc->channel[i].size;
79 if (desc->channel[i].type == UTIL_FORMAT_TYPE_VOID) {
80 shifts[i] = LLVMGetUndef(LLVMInt32Type());
81 scales[i] = LLVMGetUndef(LLVMFloatType());
84 unsigned mask = (1 << bits) - 1;
86 assert(desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED);
89 shifts[i] = LLVMConstInt(LLVMInt32Type(), shift, 0);
91 if (desc->channel[i].normalized) {
92 scales[i] = LLVMConstReal(LLVMFloatType(), mask);
96 scales[i] = LLVMConstReal(LLVMFloatType(), 1.0);
103 scaled = LLVMBuildMul(builder, unswizzled, LLVMConstVector(scales, 4), "");
107 casted = LLVMBuildFPToSI(builder, scaled, LLVMVectorType(LLVMInt32Type(), 4), "");
109 shifted = LLVMBuildShl(builder, casted, LLVMConstVector(shifts, 4), "");
111 /* Bitwise or all components */
112 for (i = 0; i < 4; ++i) {
113 if (desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED) {
114 LLVMValueRef component = LLVMBuildExtractElement(builder, shifted, LLVMConstInt(LLVMInt32Type(), i, 0), "");
116 packed = LLVMBuildOr(builder, packed, component, "");
123 packed = LLVMGetUndef(LLVMInt32Type());
125 if (desc->block.bits < 32)
126 packed = LLVMBuildTrunc(builder, packed, type, "");