/**
* @file
- * LLVM IR building helpers interfaces.
- *
- * We use LLVM-C bindings for now. They are not documented, but follow the C++
- * interfaces very closely, and appear to be complete enough for code
- * genration. See
- * http://npcontemplation.blogspot.com/2008/06/secret-of-llvm-c-bindings.html
- * for a standalone example.
+ * Pixel format helpers.
*/
#include <llvm-c/Core.h>
-
-#include "pipe/p_format.h"
+#include "pipe/p_format.h"
+struct util_format_description;
union lp_type;
* @return RGBA in a 4 floats vector.
*/
LLVMValueRef
-lp_build_unpack_rgba(LLVMBuilderRef builder,
- enum pipe_format format,
- LLVMValueRef packed);
+lp_build_unpack_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef packed);
/**
* @param rgba 4 float vector with the unpacked components.
*/
LLVMValueRef
-lp_build_pack_rgba(LLVMBuilderRef builder,
- enum pipe_format format,
- LLVMValueRef rgba);
+lp_build_pack_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef rgba);
/**
* @return RGBA in a 4 floats vector.
*/
LLVMValueRef
-lp_build_load_rgba(LLVMBuilderRef builder,
- enum pipe_format format,
- LLVMValueRef ptr);
+lp_build_load_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef ptr);
/**
* @param rgba 4 float vector with the unpacked components.
*/
void
-lp_build_store_rgba(LLVMBuilderRef builder,
- enum pipe_format format,
- LLVMValueRef ptr,
- LLVMValueRef rgba);
+lp_build_store_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef ptr,
+ LLVMValueRef rgba);
+LLVMValueRef
+lp_build_gather(LLVMBuilderRef builder,
+ unsigned length,
+ unsigned src_width,
+ unsigned dst_width,
+ LLVMValueRef base_ptr,
+ LLVMValueRef offsets);
+
+
+void
+lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
+ const struct util_format_description *format_desc,
+ union lp_type type,
+ LLVMValueRef packed,
+ LLVMValueRef *rgba);
+
+
+void
+lp_build_load_rgba_soa(LLVMBuilderRef builder,
+ const struct util_format_description *format_desc,
+ union lp_type type,
+ LLVMValueRef base_ptr,
+ LLVMValueRef offsets,
+ LLVMValueRef *rgba);
#endif /* !LP_BLD_H */
LLVMValueRef
-lp_build_unpack_rgba(LLVMBuilderRef builder,
- enum pipe_format format,
- LLVMValueRef packed)
+lp_build_unpack_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef packed)
{
const struct util_format_description *desc;
LLVMTypeRef type;
LLVMValueRef
-lp_build_pack_rgba(LLVMBuilderRef builder,
- enum pipe_format format,
- LLVMValueRef rgba)
+lp_build_pack_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef rgba)
{
const struct util_format_description *desc;
LLVMTypeRef type;
LLVMValueRef
-lp_build_load_rgba(LLVMBuilderRef builder,
- enum pipe_format format,
- LLVMValueRef ptr)
+lp_build_load_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef ptr)
{
const struct util_format_description *desc;
LLVMTypeRef type;
packed = LLVMBuildLoad(builder, ptr, "");
- return lp_build_unpack_rgba(builder, format, packed);
+ return lp_build_unpack_rgba_aos(builder, format, packed);
}
void
-lp_build_store_rgba(LLVMBuilderRef builder,
- enum pipe_format format,
- LLVMValueRef ptr,
- LLVMValueRef rgba)
+lp_build_store_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef ptr,
+ LLVMValueRef rgba)
{
const struct util_format_description *desc;
LLVMTypeRef type;
type = LLVMIntType(desc->block.bits);
- packed = lp_build_pack_rgba(builder, format, rgba);
+ packed = lp_build_pack_rgba_aos(builder, format, rgba);
ptr = LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, 0), "");
--- /dev/null
+/**************************************************************************
+ *
+ * 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"
+
+
+/**
+ * Gather elements from scatter positions in memory into a single vector.
+ *
+ * @param src_width src element width
+ * @param dst_width result element width (source will be expanded to fit)
+ * @param length length of the offsets,
+ * @param base_ptr base pointer, should be a i8 pointer type.
+ * @param offsets vector with offsets
+ */
+LLVMValueRef
+lp_build_gather(LLVMBuilderRef builder,
+ unsigned length,
+ unsigned src_width,
+ unsigned dst_width,
+ LLVMValueRef base_ptr,
+ LLVMValueRef offsets)
+{
+ LLVMTypeRef src_type = LLVMIntType(src_width);
+ LLVMTypeRef src_ptr_type = LLVMPointerType(src_type, 0);
+ LLVMTypeRef dst_elem_type = LLVMIntType(dst_width);
+ LLVMTypeRef dst_vec_type = LLVMVectorType(dst_elem_type, length);
+ LLVMValueRef res;
+ unsigned i;
+
+ res = LLVMGetUndef(dst_vec_type);
+ for(i = 0; i < length; ++i) {
+ LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), i, 0);
+ LLVMValueRef elem_offset;
+ LLVMValueRef elem_ptr;
+ LLVMValueRef elem;
+
+ elem_offset = LLVMBuildExtractElement(builder, offsets, index, "");
+ elem_ptr = LLVMBuildGEP(builder, base_ptr, &elem_offset, 1, "");
+ elem_ptr = LLVMBuildBitCast(builder, elem_ptr, src_ptr_type, "");
+ elem = LLVMBuildLoad(builder, elem_ptr, "");
+
+ assert(src_width <= dst_width);
+ if(src_width > dst_width)
+ elem = LLVMBuildTrunc(builder, elem, dst_elem_type, "");
+ if(src_width < dst_width)
+ elem = LLVMBuildZExt(builder, elem, dst_elem_type, "");
+
+ res = LLVMBuildInsertElement(builder, res, elem, index, "");
+ }
+
+ return res;
+}
+
+
+void
+lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
+ const struct util_format_description *format_desc,
+ union 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);
+ 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;
+ }
+
+ for (chan = 0; chan < 4; ++chan) {
+ enum util_format_swizzle swizzle = format_desc->swizzle[chan];
+
+ switch (swizzle) {
+ case UTIL_FORMAT_SWIZZLE_X:
+ case UTIL_FORMAT_SWIZZLE_Y:
+ case UTIL_FORMAT_SWIZZLE_Z:
+ case UTIL_FORMAT_SWIZZLE_W:
+ rgba[chan] = inputs[swizzle];
+ break;
+ case UTIL_FORMAT_SWIZZLE_0:
+ rgba[chan] = lp_build_zero(type);
+ break;
+ case UTIL_FORMAT_SWIZZLE_1:
+ rgba[chan] = lp_build_one(type);
+ break;
+ case UTIL_FORMAT_SWIZZLE_NONE:
+ rgba[chan] = lp_build_undef(type);
+ break;
+ }
+ }
+}
+
+
+void
+lp_build_load_rgba_soa(LLVMBuilderRef builder,
+ const struct util_format_description *format_desc,
+ union lp_type type,
+ LLVMValueRef base_ptr,
+ LLVMValueRef offsets,
+ LLVMValueRef *rgba)
+{
+ LLVMValueRef packed;
+
+ assert(format_desc->layout == UTIL_FORMAT_LAYOUT_ARITH);
+ assert(format_desc->block.width == 1);
+ assert(format_desc->block.height == 1);
+ assert(format_desc->block.bits <= 32);
+
+ packed = lp_build_gather(builder,
+ type.length, format_desc->block.bits, type.width,
+ base_ptr, offsets);
+
+ lp_build_unpack_rgba_soa(builder, format_desc, type, packed, rgba);
+}
projects / mesa.git / commitdiff