/**************************************************************************
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*
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* Copyright 2009 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "pipe/p_defines.h"
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#include "util/u_format.h"
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#include "util/u_memory.h"
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#include "util/u_string.h"
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#include "util/u_math.h"
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#include "lp_bld_type.h"
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#include "lp_bld_const.h"
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#include "lp_bld_conv.h"
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#include "lp_bld_swizzle.h"
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#include "lp_bld_gather.h"
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#include "lp_bld_debug.h"
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#include "lp_bld_format.h"
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#include "lp_bld_arit.h"
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#include "lp_bld_pack.h"
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static void
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convert_to_soa(struct gallivm_state *gallivm,
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LLVMValueRef src_aos[LP_MAX_VECTOR_WIDTH / 32],
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LLVMValueRef dst_soa[4],
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const struct lp_type soa_type)
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{
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unsigned j, k;
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struct lp_type aos_channel_type = soa_type;
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LLVMValueRef aos_channels[4];
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unsigned pixels_per_channel = soa_type.length / 4;
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debug_assert((soa_type.length % 4) == 0);
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aos_channel_type.length >>= 1;
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for (j = 0; j < 4; ++j) {
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LLVMValueRef channel[LP_MAX_VECTOR_LENGTH] = { 0 };
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assert(pixels_per_channel <= LP_MAX_VECTOR_LENGTH);
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for (k = 0; k < pixels_per_channel; ++k) {
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channel[k] = src_aos[j + 4 * k];
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}
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aos_channels[j] = lp_build_concat(gallivm, channel, aos_channel_type, pixels_per_channel);
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}
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lp_build_transpose_aos(gallivm, soa_type, aos_channels, dst_soa);
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}
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void
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lp_build_format_swizzle_soa(const struct util_format_description *format_desc,
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struct lp_build_context *bld,
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const LLVMValueRef *unswizzled,
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LLVMValueRef swizzled_out[4])
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{
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if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) {
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enum pipe_swizzle swizzle;
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LLVMValueRef depth_or_stencil;
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if (util_format_has_stencil(format_desc) &&
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!util_format_has_depth(format_desc)) {
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assert(!bld->type.floating);
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swizzle = format_desc->swizzle[1];
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}
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else {
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assert(bld->type.floating);
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swizzle = format_desc->swizzle[0];
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}
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/*
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* Return zzz1 or sss1 for depth-stencil formats here.
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* Correct swizzling will be handled by apply_sampler_swizzle() later.
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*/
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depth_or_stencil = lp_build_swizzle_soa_channel(bld, unswizzled, swizzle);
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swizzled_out[2] = swizzled_out[1] = swizzled_out[0] = depth_or_stencil;
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swizzled_out[3] = bld->one;
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}
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else {
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unsigned chan;
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for (chan = 0; chan < 4; ++chan) {
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enum pipe_swizzle swizzle = format_desc->swizzle[chan];
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swizzled_out[chan] = lp_build_swizzle_soa_channel(bld, unswizzled, swizzle);
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}
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}
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}
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static LLVMValueRef
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lp_build_extract_soa_chan(struct lp_build_context *bld,
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unsigned blockbits,
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boolean srgb_chan,
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struct util_format_channel_description chan_desc,
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LLVMValueRef packed)
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{
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struct gallivm_state *gallivm = bld->gallivm;
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LLVMBuilderRef builder = gallivm->builder;
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struct lp_type type = bld->type;
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LLVMValueRef input = packed;
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const unsigned width = chan_desc.size;
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const unsigned start = chan_desc.shift;
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const unsigned stop = start + width;
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/* Decode the input vector component */
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switch(chan_desc.type) {
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case UTIL_FORMAT_TYPE_VOID:
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input = bld->undef;
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break;
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case UTIL_FORMAT_TYPE_UNSIGNED:
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/*
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* Align the LSB
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*/
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if (start) {
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input = LLVMBuildLShr(builder, input,
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lp_build_const_int_vec(gallivm, type, start), "");
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}
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/*
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* Zero the MSBs
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*/
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if (stop < blockbits) {
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unsigned mask = ((unsigned long long)1 << width) - 1;
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input = LLVMBuildAnd(builder, input,
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lp_build_const_int_vec(gallivm, type, mask), "");
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}
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/*
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* Type conversion
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*/
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if (type.floating) {
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if (srgb_chan) {
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struct lp_type conv_type = lp_uint_type(type);
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input = lp_build_srgb_to_linear(gallivm, conv_type, width, input);
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}
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else {
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if(chan_desc.normalized)
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input = lp_build_unsigned_norm_to_float(gallivm, width, type, input);
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else
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input = LLVMBuildSIToFP(builder, input, bld->vec_type, "");
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}
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}
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else if (chan_desc.pure_integer) {
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/* Nothing to do */
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} else {
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/* FIXME */
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assert(0);
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}
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break;
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case UTIL_FORMAT_TYPE_SIGNED:
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/*
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* Align the sign bit first.
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*/
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if (stop < type.width) {
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unsigned bits = type.width - stop;
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LLVMValueRef bits_val = lp_build_const_int_vec(gallivm, type, bits);
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input = LLVMBuildShl(builder, input, bits_val, "");
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}
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/*
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* Align the LSB (with an arithmetic shift to preserve the sign)
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*/
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if (chan_desc.size < type.width) {
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unsigned bits = type.width - chan_desc.size;
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LLVMValueRef bits_val = lp_build_const_int_vec(gallivm, type, bits);
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input = LLVMBuildAShr(builder, input, bits_val, "");
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}
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/*
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* Type conversion
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*/
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if (type.floating) {
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input = LLVMBuildSIToFP(builder, input, bld->vec_type, "");
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if (chan_desc.normalized) {
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double scale = 1.0 / ((1 << (chan_desc.size - 1)) - 1);
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LLVMValueRef scale_val = lp_build_const_vec(gallivm, type, scale);
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input = LLVMBuildFMul(builder, input, scale_val, "");
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/*
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* The formula above will produce value below -1.0 for most negative
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* value but everything seems happy with that hence disable for now.
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*/
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if (0)
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input = lp_build_max(bld, input,
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lp_build_const_vec(gallivm, type, -1.0f));
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}
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}
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else if (chan_desc.pure_integer) {
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/* Nothing to do */
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} else {
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/* FIXME */
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assert(0);
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}
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break;
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case UTIL_FORMAT_TYPE_FLOAT:
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if (type.floating) {
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if (chan_desc.size == 16) {
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struct lp_type f16i_type = type;
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f16i_type.width /= 2;
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f16i_type.floating = 0;
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if (start) {
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input = LLVMBuildLShr(builder, input,
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lp_build_const_int_vec(gallivm, type, start), "");
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}
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input = LLVMBuildTrunc(builder, input,
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lp_build_vec_type(gallivm, f16i_type), "");
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input = lp_build_half_to_float(gallivm, input);
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} else {
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assert(start == 0);
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assert(stop == 32);
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assert(type.width == 32);
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}
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input = LLVMBuildBitCast(builder, input, bld->vec_type, "");
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}
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else {
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/* FIXME */
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assert(0);
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input = bld->undef;
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}
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break;
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case UTIL_FORMAT_TYPE_FIXED:
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if (type.floating) {
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double scale = 1.0 / ((1 << (chan_desc.size/2)) - 1);
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LLVMValueRef scale_val = lp_build_const_vec(gallivm, type, scale);
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input = LLVMBuildSIToFP(builder, input, bld->vec_type, "");
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input = LLVMBuildFMul(builder, input, scale_val, "");
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}
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else {
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/* FIXME */
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assert(0);
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input = bld->undef;
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}
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break;
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default:
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assert(0);
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input = bld->undef;
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break;
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}
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return input;
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}
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/**
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* Unpack several pixels in SoA.
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*
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* It takes a vector of packed pixels:
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*
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* packed = {P0, P1, P2, P3, ..., Pn}
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*
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* And will produce four vectors:
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*
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* red = {R0, R1, R2, R3, ..., Rn}
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* green = {G0, G1, G2, G3, ..., Gn}
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* blue = {B0, B1, B2, B3, ..., Bn}
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* alpha = {A0, A1, A2, A3, ..., An}
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*
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* It requires that a packed pixel fits into an element of the output
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* channels. The common case is when converting pixel with a depth of 32 bit or
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* less into floats.
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*
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* \param format_desc the format of the 'packed' incoming pixel vector
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* \param type the desired type for rgba_out (type.length = n, above)
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* \param packed the incoming vector of packed pixels
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* \param rgba_out returns the SoA R,G,B,A vectors
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*/
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void
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lp_build_unpack_rgba_soa(struct gallivm_state *gallivm,
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const struct util_format_description *format_desc,
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struct lp_type type,
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LLVMValueRef packed,
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LLVMValueRef rgba_out[4])
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{
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struct lp_build_context bld;
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LLVMValueRef inputs[4];
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unsigned chan;
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assert(format_desc->layout == UTIL_FORMAT_LAYOUT_PLAIN);
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assert(format_desc->block.width == 1);
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assert(format_desc->block.height == 1);
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assert(format_desc->block.bits <= type.width);
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/* FIXME: Support more output types */
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assert(type.width == 32);
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lp_build_context_init(&bld, gallivm, type);
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/* Decode the input vector components */
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for (chan = 0; chan < format_desc->nr_channels; ++chan) {
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struct util_format_channel_description chan_desc = format_desc->channel[chan];
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boolean srgb_chan = FALSE;
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if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB &&
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format_desc->swizzle[3] != chan) {
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srgb_chan = TRUE;
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}
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inputs[chan] = lp_build_extract_soa_chan(&bld,
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format_desc->block.bits,
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srgb_chan,
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chan_desc,
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packed);
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}
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lp_build_format_swizzle_soa(format_desc, &bld, inputs, rgba_out);
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}
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/**
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* Convert a vector of rgba8 values into 32bit wide SoA vectors.
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*
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* \param dst_type The desired return type. For pure integer formats
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* this should be a 32bit wide int or uint vector type,
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* otherwise a float vector type.
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*
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* \param packed The rgba8 values to pack.
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*
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* \param rgba The 4 SoA return vectors.
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*/
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void
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lp_build_rgba8_to_fi32_soa(struct gallivm_state *gallivm,
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struct lp_type dst_type,
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LLVMValueRef packed,
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LLVMValueRef *rgba)
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{
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LLVMBuilderRef builder = gallivm->builder;
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LLVMValueRef mask = lp_build_const_int_vec(gallivm, dst_type, 0xff);
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unsigned chan;
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/* XXX technically shouldn't use that for uint dst_type */
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packed = LLVMBuildBitCast(builder, packed,
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lp_build_int_vec_type(gallivm, dst_type), "");
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/* Decode the input vector components */
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for (chan = 0; chan < 4; ++chan) {
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#ifdef PIPE_ARCH_LITTLE_ENDIAN
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unsigned start = chan*8;
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#else
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unsigned start = (3-chan)*8;
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#endif
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unsigned stop = start + 8;
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LLVMValueRef input;
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input = packed;
|
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if (start)
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input = LLVMBuildLShr(builder, input,
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lp_build_const_int_vec(gallivm, dst_type, start), "");
|
|
if (stop < 32)
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input = LLVMBuildAnd(builder, input, mask, "");
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if (dst_type.floating)
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input = lp_build_unsigned_norm_to_float(gallivm, 8, dst_type, input);
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rgba[chan] = input;
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}
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}
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|
|
|
/**
|
* Fetch a texels from a texture, returning them in SoA layout.
|
*
|
* \param type the desired return type for 'rgba'. The vector length
|
* is the number of texels to fetch
|
* \param aligned if the offset is guaranteed to be aligned to element width
|
*
|
* \param base_ptr points to the base of the texture mip tree.
|
* \param offset offset to start of the texture image block. For non-
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* compressed formats, this simply is an offset to the texel.
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* For compressed formats, it is an offset to the start of the
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* compressed data block.
|
*
|
* \param i, j the sub-block pixel coordinates. For non-compressed formats
|
* these will always be (0,0). For compressed formats, i will
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* be in [0, block_width-1] and j will be in [0, block_height-1].
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* \param cache optional value pointing to a lp_build_format_cache structure
|
*/
|
void
|
lp_build_fetch_rgba_soa(struct gallivm_state *gallivm,
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const struct util_format_description *format_desc,
|
struct lp_type type,
|
boolean aligned,
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LLVMValueRef base_ptr,
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LLVMValueRef offset,
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LLVMValueRef i,
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LLVMValueRef j,
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LLVMValueRef cache,
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LLVMValueRef rgba_out[4])
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{
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LLVMBuilderRef builder = gallivm->builder;
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enum pipe_format format = format_desc->format;
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struct lp_type fetch_type;
|
|
if (format_desc->layout == UTIL_FORMAT_LAYOUT_PLAIN &&
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(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB ||
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format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB ||
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format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) &&
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format_desc->block.width == 1 &&
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format_desc->block.height == 1 &&
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format_desc->block.bits <= type.width &&
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(format_desc->channel[0].type != UTIL_FORMAT_TYPE_FLOAT ||
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format_desc->channel[0].size == 32 ||
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format_desc->channel[0].size == 16))
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{
|
/*
|
* The packed pixel fits into an element of the destination format. Put
|
* the packed pixels into a vector and extract each component for all
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* vector elements in parallel.
|
*/
|
|
LLVMValueRef packed;
|
|
/*
|
* gather the texels from the texture
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* Ex: packed = {XYZW, XYZW, XYZW, XYZW}
|
*/
|
assert(format_desc->block.bits <= type.width);
|
fetch_type = lp_type_uint(type.width);
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packed = lp_build_gather(gallivm,
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type.length,
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format_desc->block.bits,
|
fetch_type,
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aligned,
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base_ptr, offset, FALSE);
|
|
/*
|
* convert texels to float rgba
|
*/
|
lp_build_unpack_rgba_soa(gallivm,
|
format_desc,
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type,
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packed, rgba_out);
|
return;
|
}
|
|
|
if (format_desc->layout == UTIL_FORMAT_LAYOUT_PLAIN &&
|
(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB) &&
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format_desc->block.width == 1 &&
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format_desc->block.height == 1 &&
|
format_desc->block.bits > type.width &&
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((format_desc->block.bits <= type.width * type.length &&
|
format_desc->channel[0].size <= type.width) ||
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(format_desc->channel[0].size == 64 &&
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format_desc->channel[0].type == UTIL_FORMAT_TYPE_FLOAT &&
|
type.floating)))
|
{
|
/*
|
* Similar to above, but the packed pixel is larger than what fits
|
* into an element of the destination format. The packed pixels will be
|
* shuffled into SoA vectors appropriately, and then the extraction will
|
* be done in parallel as much as possible.
|
* Good for 16xn (n > 2) and 32xn (n > 1) formats, care is taken so
|
* the gathered vectors can be shuffled easily (even with avx).
|
* 64xn float -> 32xn float is handled too but it's a bit special as
|
* it does the conversion pre-shuffle.
|
*/
|
|
LLVMValueRef packed[4], dst[4], output[4], shuffles[LP_MAX_VECTOR_WIDTH/32];
|
struct lp_type fetch_type, gather_type = type;
|
unsigned num_gather, fetch_width, i, j;
|
struct lp_build_context bld;
|
boolean fp64 = format_desc->channel[0].size == 64;
|
|
lp_build_context_init(&bld, gallivm, type);
|
|
assert(type.width == 32);
|
assert(format_desc->block.bits > type.width);
|
|
/*
|
* First, figure out fetch order.
|
*/
|
fetch_width = util_next_power_of_two(format_desc->block.bits);
|
/*
|
* fp64 are treated like fp32 except we fetch twice wide values
|
* (as we shuffle after trunc). The shuffles for that work out
|
* mostly fine (slightly suboptimal for 4-wide, perfect for AVX)
|
* albeit we miss the potential opportunity for hw gather (as it
|
* only handles native size).
|
*/
|
num_gather = fetch_width / type.width;
|
gather_type.width *= num_gather;
|
if (fp64) {
|
num_gather /= 2;
|
}
|
gather_type.length /= num_gather;
|
|
for (i = 0; i < num_gather; i++) {
|
LLVMValueRef offsetr, shuf_vec;
|
if(num_gather == 4) {
|
for (j = 0; j < gather_type.length; j++) {
|
unsigned idx = i + 4*j;
|
shuffles[j] = lp_build_const_int32(gallivm, idx);
|
}
|
shuf_vec = LLVMConstVector(shuffles, gather_type.length);
|
offsetr = LLVMBuildShuffleVector(builder, offset, offset, shuf_vec, "");
|
|
}
|
else if (num_gather == 2) {
|
assert(num_gather == 2);
|
for (j = 0; j < gather_type.length; j++) {
|
unsigned idx = i*2 + (j%2) + (j/2)*4;
|
shuffles[j] = lp_build_const_int32(gallivm, idx);
|
}
|
shuf_vec = LLVMConstVector(shuffles, gather_type.length);
|
offsetr = LLVMBuildShuffleVector(builder, offset, offset, shuf_vec, "");
|
}
|
else {
|
assert(num_gather == 1);
|
offsetr = offset;
|
}
|
if (gather_type.length == 1) {
|
LLVMValueRef zero = lp_build_const_int32(gallivm, 0);
|
offsetr = LLVMBuildExtractElement(builder, offsetr, zero, "");
|
}
|
|
/*
|
* Determine whether to use float or int loads. This is mostly
|
* to outsmart the (stupid) llvm int/float shuffle logic, we
|
* don't really care much if the data is floats or ints...
|
* But llvm will refuse to use single float shuffle with int data
|
* and instead use 3 int shuffles instead, the code looks atrocious.
|
* (Note bitcasts often won't help, as llvm is too smart to be
|
* fooled by that.)
|
* Nobody cares about simd float<->int domain transition penalties,
|
* which usually don't even exist for shuffles anyway.
|
* With 4x32bit (and 3x32bit) fetch, we use float vec (the data is
|
* going into transpose, which is unpacks, so doesn't really matter
|
* much).
|
* With 2x32bit or 4x16bit fetch, we use float vec, since those
|
* go into the weird channel separation shuffle. With floats,
|
* this is (with 128bit vectors):
|
* - 2 movq, 2 movhpd, 2 shufps
|
* With ints it would be:
|
* - 4 movq, 2 punpcklqdq, 4 pshufd, 2 blendw
|
* I've seen texture functions increase in code size by 15% just due
|
* to that (there's lots of such fetches in them...)
|
* (We could chose a different gather order to improve this somewhat
|
* for the int path, but it would basically just drop the blends,
|
* so the float path with this order really is optimal.)
|
* Albeit it is tricky sometimes llvm doesn't ignore the float->int
|
* casts so must avoid them until we're done with the float shuffle...
|
* 3x16bit formats (the same is also true for 3x8) are pretty bad but
|
* there's nothing we can do about them (we could overallocate by
|
* those couple bytes and use unaligned but pot sized load).
|
* Note that this is very much x86 specific. I don't know if this
|
* affect other archs at all.
|
*/
|
if (num_gather > 1) {
|
/*
|
* We always want some float type here (with x86)
|
* due to shuffles being float ones afterwards (albeit for
|
* the num_gather == 4 case int should work fine too
|
* (unless there's some problems with avx but not avx2).
|
*/
|
if (format_desc->channel[0].size == 64) {
|
fetch_type = lp_type_float_vec(64, gather_type.width);
|
} else {
|
fetch_type = lp_type_int_vec(32, gather_type.width);
|
}
|
}
|
else {
|
/* type doesn't matter much */
|
if (format_desc->channel[0].type == UTIL_FORMAT_TYPE_FLOAT &&
|
(format_desc->channel[0].size == 32 ||
|
format_desc->channel[0].size == 64)) {
|
fetch_type = lp_type_float(gather_type.width);
|
} else {
|
fetch_type = lp_type_uint(gather_type.width);
|
}
|
}
|
|
/* Now finally gather the values */
|
packed[i] = lp_build_gather(gallivm, gather_type.length,
|
format_desc->block.bits,
|
fetch_type, aligned,
|
base_ptr, offsetr, FALSE);
|
if (fp64) {
|
struct lp_type conv_type = type;
|
conv_type.width *= 2;
|
packed[i] = LLVMBuildBitCast(builder, packed[i],
|
lp_build_vec_type(gallivm, conv_type), "");
|
packed[i] = LLVMBuildFPTrunc(builder, packed[i], bld.vec_type, "");
|
}
|
}
|
|
/* shuffle the gathered values to SoA */
|
if (num_gather == 2) {
|
for (i = 0; i < num_gather; i++) {
|
for (j = 0; j < type.length; j++) {
|
unsigned idx = (j%2)*2 + (j/4)*4 + i;
|
if ((j/2)%2)
|
idx += type.length;
|
shuffles[j] = lp_build_const_int32(gallivm, idx);
|
}
|
dst[i] = LLVMBuildShuffleVector(builder, packed[0], packed[1],
|
LLVMConstVector(shuffles, type.length), "");
|
}
|
}
|
else if (num_gather == 4) {
|
lp_build_transpose_aos(gallivm, lp_int_type(type), packed, dst);
|
}
|
else {
|
assert(num_gather == 1);
|
dst[0] = packed[0];
|
}
|
|
/*
|
* And finally unpack exactly as above, except that
|
* chan shift is adjusted and the right vector selected.
|
*/
|
if (!fp64) {
|
for (i = 0; i < num_gather; i++) {
|
dst[i] = LLVMBuildBitCast(builder, dst[i], bld.int_vec_type, "");
|
}
|
for (i = 0; i < format_desc->nr_channels; i++) {
|
struct util_format_channel_description chan_desc = format_desc->channel[i];
|
unsigned blockbits = type.width;
|
unsigned vec_nr;
|
|
#ifdef PIPE_ARCH_BIG_ENDIAN
|
vec_nr = (format_desc->block.bits - (chan_desc.shift + chan_desc.size)) / type.width;
|
#else
|
vec_nr = chan_desc.shift / type.width;
|
#endif
|
chan_desc.shift %= type.width;
|
|
output[i] = lp_build_extract_soa_chan(&bld,
|
blockbits,
|
FALSE,
|
chan_desc,
|
dst[vec_nr]);
|
}
|
}
|
else {
|
for (i = 0; i < format_desc->nr_channels; i++) {
|
output[i] = dst[i];
|
}
|
}
|
|
lp_build_format_swizzle_soa(format_desc, &bld, output, rgba_out);
|
return;
|
}
|
|
if (format == PIPE_FORMAT_R11G11B10_FLOAT ||
|
format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
|
/*
|
* similar conceptually to above but requiring special
|
* AoS packed -> SoA float conversion code.
|
*/
|
LLVMValueRef packed;
|
struct lp_type fetch_type = lp_type_uint(type.width);
|
|
assert(type.floating);
|
assert(type.width == 32);
|
|
packed = lp_build_gather(gallivm, type.length,
|
format_desc->block.bits,
|
fetch_type, aligned,
|
base_ptr, offset, FALSE);
|
if (format == PIPE_FORMAT_R11G11B10_FLOAT) {
|
lp_build_r11g11b10_to_float(gallivm, packed, rgba_out);
|
}
|
else {
|
lp_build_rgb9e5_to_float(gallivm, packed, rgba_out);
|
}
|
return;
|
}
|
|
if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
|
format_desc->block.bits == 64) {
|
/*
|
* special case the format is 64 bits but we only require
|
* 32bit (or 8bit) from each block.
|
*/
|
LLVMValueRef packed;
|
struct lp_type fetch_type = lp_type_uint(type.width);
|
|
if (format == PIPE_FORMAT_X32_S8X24_UINT) {
|
/*
|
* for stencil simply fix up offsets - could in fact change
|
* base_ptr instead even outside the shader.
|
*/
|
unsigned mask = (1 << 8) - 1;
|
LLVMValueRef s_offset = lp_build_const_int_vec(gallivm, type, 4);
|
offset = LLVMBuildAdd(builder, offset, s_offset, "");
|
packed = lp_build_gather(gallivm, type.length, 32, fetch_type,
|
aligned, base_ptr, offset, FALSE);
|
packed = LLVMBuildAnd(builder, packed,
|
lp_build_const_int_vec(gallivm, type, mask), "");
|
}
|
else {
|
assert (format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT);
|
packed = lp_build_gather(gallivm, type.length, 32, fetch_type,
|
aligned, base_ptr, offset, TRUE);
|
packed = LLVMBuildBitCast(builder, packed,
|
lp_build_vec_type(gallivm, type), "");
|
}
|
/* for consistency with lp_build_unpack_rgba_soa() return sss1 or zzz1 */
|
rgba_out[0] = rgba_out[1] = rgba_out[2] = packed;
|
rgba_out[3] = lp_build_const_vec(gallivm, type, 1.0f);
|
return;
|
}
|
|
/*
|
* Try calling lp_build_fetch_rgba_aos for all pixels.
|
* Should only really hit subsampled, compressed
|
* (for s3tc srgb too, for rgtc the unorm ones only) by now.
|
* (This is invalid for plain 8unorm formats because we're lazy with
|
* the swizzle since some results would arrive swizzled, some not.)
|
*/
|
|
if ((format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN) &&
|
(util_format_fits_8unorm(format_desc) ||
|
format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) &&
|
type.floating && type.width == 32 &&
|
(type.length == 1 || (type.length % 4 == 0))) {
|
struct lp_type tmp_type;
|
struct lp_build_context bld;
|
LLVMValueRef packed, rgba[4];
|
const struct util_format_description *flinear_desc;
|
const struct util_format_description *frgba8_desc;
|
unsigned chan;
|
|
lp_build_context_init(&bld, gallivm, type);
|
|
/*
|
* Make sure the conversion in aos really only does convert to rgba8
|
* and not anything more (so use linear format, adjust type).
|
*/
|
flinear_desc = util_format_description(util_format_linear(format));
|
memset(&tmp_type, 0, sizeof tmp_type);
|
tmp_type.width = 8;
|
tmp_type.length = type.length * 4;
|
tmp_type.norm = TRUE;
|
|
packed = lp_build_fetch_rgba_aos(gallivm, flinear_desc, tmp_type,
|
aligned, base_ptr, offset, i, j, cache);
|
packed = LLVMBuildBitCast(builder, packed, bld.int_vec_type, "");
|
|
/*
|
* The values are now packed so they match ordinary (srgb) RGBA8 format,
|
* hence need to use matching format for unpack.
|
*/
|
frgba8_desc = util_format_description(PIPE_FORMAT_R8G8B8A8_UNORM);
|
if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
|
assert(format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC);
|
frgba8_desc = util_format_description(PIPE_FORMAT_R8G8B8A8_SRGB);
|
}
|
lp_build_unpack_rgba_soa(gallivm,
|
frgba8_desc,
|
type,
|
packed, rgba);
|
|
/*
|
* We converted 4 channels. Make sure llvm can drop unneeded ones
|
* (luckily the rgba order is fixed, only LA needs special case).
|
*/
|
for (chan = 0; chan < 4; chan++) {
|
enum pipe_swizzle swizzle = format_desc->swizzle[chan];
|
if (chan == 3 && util_format_is_luminance_alpha(format)) {
|
swizzle = PIPE_SWIZZLE_W;
|
}
|
rgba_out[chan] = lp_build_swizzle_soa_channel(&bld, rgba, swizzle);
|
}
|
return;
|
}
|
|
|
/*
|
* Fallback to calling lp_build_fetch_rgba_aos for each pixel.
|
*
|
* This is not the most efficient way of fetching pixels, as we
|
* miss some opportunities to do vectorization, but this is
|
* convenient for formats or scenarios for which there was no
|
* opportunity or incentive to optimize.
|
*
|
* We do NOT want to end up here, this typically is quite terrible,
|
* in particular if the formats have less than 4 channels.
|
*
|
* Right now, this should only be hit for:
|
* - RGTC snorm formats
|
* (those miss fast fetch functions hence they are terrible anyway)
|
*/
|
|
{
|
unsigned k;
|
struct lp_type tmp_type;
|
LLVMValueRef aos_fetch[LP_MAX_VECTOR_WIDTH / 32];
|
|
if (gallivm_debug & GALLIVM_DEBUG_PERF) {
|
debug_printf("%s: AoS fetch fallback for %s\n",
|
__FUNCTION__, format_desc->short_name);
|
}
|
|
tmp_type = type;
|
tmp_type.length = 4;
|
|
/*
|
* Note that vector transpose can be worse compared to insert/extract
|
* for aos->soa conversion (for formats with 1 or 2 channels). However,
|
* we should try to avoid getting here for just about all formats, so
|
* don't bother.
|
*/
|
|
/* loop over number of pixels */
|
for(k = 0; k < type.length; ++k) {
|
LLVMValueRef index = lp_build_const_int32(gallivm, k);
|
LLVMValueRef offset_elem;
|
LLVMValueRef i_elem, j_elem;
|
|
offset_elem = LLVMBuildExtractElement(builder, offset,
|
index, "");
|
|
i_elem = LLVMBuildExtractElement(builder, i, index, "");
|
j_elem = LLVMBuildExtractElement(builder, j, index, "");
|
|
/* Get a single float[4]={R,G,B,A} pixel */
|
aos_fetch[k] = lp_build_fetch_rgba_aos(gallivm, format_desc, tmp_type,
|
aligned, base_ptr, offset_elem,
|
i_elem, j_elem, cache);
|
|
}
|
convert_to_soa(gallivm, aos_fetch, rgba_out, type);
|
}
|
}
|
