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/**************************************************************************
*
* Copyright 2009 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 "util/u_format.h"
#include "lp_bld_type.h"
#include "lp_bld_const.h"
#include "lp_bld_conv.h"
#include "lp_bld_format.h"
static LLVMValueRef
lp_build_format_swizzle_chan_soa(struct lp_type type,
const LLVMValueRef *unswizzled,
enum util_format_swizzle swizzle)
{
switch (swizzle) {
case UTIL_FORMAT_SWIZZLE_X:
case UTIL_FORMAT_SWIZZLE_Y:
case UTIL_FORMAT_SWIZZLE_Z:
case UTIL_FORMAT_SWIZZLE_W:
return unswizzled[swizzle];
case UTIL_FORMAT_SWIZZLE_0:
return lp_build_zero(type);
case UTIL_FORMAT_SWIZZLE_1:
return lp_build_one(type);
case UTIL_FORMAT_SWIZZLE_NONE:
return lp_build_undef(type);
default:
assert(0);
return lp_build_undef(type);
}
}
void
lp_build_format_swizzle_soa(const struct util_format_description *format_desc,
struct lp_type type,
const LLVMValueRef *unswizzled,
LLVMValueRef *swizzled)
{
if(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) {
enum util_format_swizzle swizzle = format_desc->swizzle[0];
LLVMValueRef depth = lp_build_format_swizzle_chan_soa(type, unswizzled, swizzle);
swizzled[2] = swizzled[1] = swizzled[0] = depth;
swizzled[3] = lp_build_one(type);
}
else {
unsigned chan;
for (chan = 0; chan < 4; ++chan) {
enum util_format_swizzle swizzle = format_desc->swizzle[chan];
swizzled[chan] = lp_build_format_swizzle_chan_soa(type, unswizzled, swizzle);
}
}
}
void
lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
const struct util_format_description *format_desc,
struct lp_type type,
LLVMValueRef packed,
LLVMValueRef *rgba)
{
LLVMValueRef inputs[4];
unsigned start;
unsigned chan;
/* FIXME: Support more formats */
assert(format_desc->layout == UTIL_FORMAT_LAYOUT_ARITH ||
(format_desc->layout == UTIL_FORMAT_LAYOUT_ARRAY &&
format_desc->block.bits == format_desc->channel[0].size));
assert(format_desc->block.width == 1);
assert(format_desc->block.height == 1);
assert(format_desc->block.bits <= 32);
/* Decode the input vector components */
start = 0;
for (chan = 0; chan < 4; ++chan) {
unsigned width = format_desc->channel[chan].size;
unsigned stop = start + width;
LLVMValueRef input;
input = packed;
switch(format_desc->channel[chan].type) {
case UTIL_FORMAT_TYPE_VOID:
input = NULL;
break;
case UTIL_FORMAT_TYPE_UNSIGNED:
if(type.floating) {
if(start)
input = LLVMBuildLShr(builder, input, lp_build_int_const_scalar(type, start), "");
if(stop < format_desc->block.bits) {
unsigned mask = ((unsigned long long)1 << width) - 1;
input = LLVMBuildAnd(builder, input, lp_build_int_const_scalar(type, mask), "");
}
if(format_desc->channel[chan].normalized)
input = lp_build_unsigned_norm_to_float(builder, width, type, input);
else
input = LLVMBuildFPToSI(builder, input, lp_build_vec_type(type), "");
}
else {
/* FIXME */
assert(0);
input = lp_build_undef(type);
}
break;
default:
/* fall through */
input = lp_build_undef(type);
break;
}
inputs[chan] = input;
start = stop;
}
lp_build_format_swizzle_soa(format_desc, type, inputs, rgba);
}
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