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Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_format_aos.c')
-rw-r--r--src/gallium/drivers/llvmpipe/lp_bld_format_aos.c303
1 files changed, 303 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_format_aos.c b/src/gallium/drivers/llvmpipe/lp_bld_format_aos.c
new file mode 100644
index 0000000000..b9b5d84bed
--- /dev/null
+++ b/src/gallium/drivers/llvmpipe/lp_bld_format_aos.c
@@ -0,0 +1,303 @@
+/**************************************************************************
+ *
+ * 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_format.h"
+
+
+LLVMValueRef
+lp_build_unpack_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef packed)
+{
+ const struct util_format_description *desc;
+ LLVMTypeRef type;
+ LLVMValueRef shifted, casted, scaled, masked;
+ LLVMValueRef shifts[4];
+ LLVMValueRef masks[4];
+ LLVMValueRef scales[4];
+ LLVMValueRef swizzles[4];
+ LLVMValueRef aux[4];
+ bool normalized;
+ int empty_channel;
+ unsigned shift;
+ unsigned i;
+
+ desc = util_format_description(format);
+
+ /* FIXME: Support more formats */
+ assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH);
+ assert(desc->block.width == 1);
+ assert(desc->block.height == 1);
+ assert(desc->block.bits <= 32);
+
+ type = LLVMIntType(desc->block.bits);
+
+ /* Do the intermediate integer computations with 32bit integers since it
+ * matches floating point size */
+ if (desc->block.bits < 32)
+ packed = LLVMBuildZExt(builder, packed, LLVMInt32Type(), "");
+
+ /* Broadcast the packed value to all four channels */
+ packed = LLVMBuildInsertElement(builder,
+ LLVMGetUndef(LLVMVectorType(LLVMInt32Type(), 4)),
+ packed,
+ LLVMConstNull(LLVMInt32Type()),
+ "");
+ packed = LLVMBuildShuffleVector(builder,
+ packed,
+ LLVMGetUndef(LLVMVectorType(LLVMInt32Type(), 4)),
+ LLVMConstNull(LLVMVectorType(LLVMInt32Type(), 4)),
+ "");
+
+ /* Initialize vector constants */
+ normalized = FALSE;
+ empty_channel = -1;
+ shift = 0;
+ for (i = 0; i < 4; ++i) {
+ unsigned bits = desc->channel[i].size;
+
+ if (desc->channel[i].type == UTIL_FORMAT_TYPE_VOID) {
+ shifts[i] = LLVMGetUndef(LLVMInt32Type());
+ masks[i] = LLVMConstNull(LLVMInt32Type());
+ scales[i] = LLVMConstNull(LLVMFloatType());
+ empty_channel = i;
+ }
+ else {
+ unsigned mask = (1 << bits) - 1;
+
+ assert(desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED);
+ assert(bits < 32);
+
+ shifts[i] = LLVMConstInt(LLVMInt32Type(), shift, 0);
+ masks[i] = LLVMConstInt(LLVMInt32Type(), mask, 0);
+
+ if (desc->channel[i].normalized) {
+ scales[i] = LLVMConstReal(LLVMFloatType(), 1.0/mask);
+ normalized = TRUE;
+ }
+ else
+ scales[i] = LLVMConstReal(LLVMFloatType(), 1.0);
+ }
+
+ shift += bits;
+ }
+
+ shifted = LLVMBuildLShr(builder, packed, LLVMConstVector(shifts, 4), "");
+ masked = LLVMBuildAnd(builder, shifted, LLVMConstVector(masks, 4), "");
+ // UIToFP can't be expressed in SSE2
+ casted = LLVMBuildSIToFP(builder, masked, LLVMVectorType(LLVMFloatType(), 4), "");
+
+ if (normalized)
+ scaled = LLVMBuildMul(builder, casted, LLVMConstVector(scales, 4), "");
+ else
+ scaled = casted;
+
+ for (i = 0; i < 4; ++i)
+ aux[i] = LLVMGetUndef(LLVMFloatType());
+
+ for (i = 0; i < 4; ++i) {
+ enum util_format_swizzle swizzle = desc->swizzle[i];
+
+ switch (swizzle) {
+ case UTIL_FORMAT_SWIZZLE_X:
+ case UTIL_FORMAT_SWIZZLE_Y:
+ case UTIL_FORMAT_SWIZZLE_Z:
+ case UTIL_FORMAT_SWIZZLE_W:
+ swizzles[i] = LLVMConstInt(LLVMInt32Type(), swizzle, 0);
+ break;
+ case UTIL_FORMAT_SWIZZLE_0:
+ assert(empty_channel >= 0);
+ swizzles[i] = LLVMConstInt(LLVMInt32Type(), empty_channel, 0);
+ break;
+ case UTIL_FORMAT_SWIZZLE_1:
+ swizzles[i] = LLVMConstInt(LLVMInt32Type(), 4, 0);
+ aux[0] = LLVMConstReal(LLVMFloatType(), 1.0);
+ break;
+ case UTIL_FORMAT_SWIZZLE_NONE:
+ swizzles[i] = LLVMGetUndef(LLVMFloatType());
+ assert(0);
+ break;
+ }
+ }
+
+ return LLVMBuildShuffleVector(builder, scaled, LLVMConstVector(aux, 4), LLVMConstVector(swizzles, 4), "");
+}
+
+
+LLVMValueRef
+lp_build_pack_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef rgba)
+{
+ const struct util_format_description *desc;
+ LLVMTypeRef type;
+ LLVMValueRef packed = NULL;
+ LLVMValueRef swizzles[4];
+ LLVMValueRef shifted, casted, scaled, unswizzled;
+ LLVMValueRef shifts[4];
+ LLVMValueRef scales[4];
+ bool normalized;
+ unsigned shift;
+ unsigned i, j;
+
+ desc = util_format_description(format);
+
+ assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH);
+ assert(desc->block.width == 1);
+ assert(desc->block.height == 1);
+
+ type = LLVMIntType(desc->block.bits);
+
+ /* Unswizzle the color components into the source vector. */
+ for (i = 0; i < 4; ++i) {
+ for (j = 0; j < 4; ++j) {
+ if (desc->swizzle[j] == i)
+ break;
+ }
+ if (j < 4)
+ swizzles[i] = LLVMConstInt(LLVMInt32Type(), j, 0);
+ else
+ swizzles[i] = LLVMGetUndef(LLVMInt32Type());
+ }
+
+ unswizzled = LLVMBuildShuffleVector(builder, rgba,
+ LLVMGetUndef(LLVMVectorType(LLVMFloatType(), 4)),
+ LLVMConstVector(swizzles, 4), "");
+
+ normalized = FALSE;
+ shift = 0;
+ for (i = 0; i < 4; ++i) {
+ unsigned bits = desc->channel[i].size;
+
+ if (desc->channel[i].type == UTIL_FORMAT_TYPE_VOID) {
+ shifts[i] = LLVMGetUndef(LLVMInt32Type());
+ scales[i] = LLVMGetUndef(LLVMFloatType());
+ }
+ else {
+ unsigned mask = (1 << bits) - 1;
+
+ assert(desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED);
+ assert(bits < 32);
+
+ shifts[i] = LLVMConstInt(LLVMInt32Type(), shift, 0);
+
+ if (desc->channel[i].normalized) {
+ scales[i] = LLVMConstReal(LLVMFloatType(), mask);
+ normalized = TRUE;
+ }
+ else
+ scales[i] = LLVMConstReal(LLVMFloatType(), 1.0);
+ }
+
+ shift += bits;
+ }
+
+ if (normalized)
+ scaled = LLVMBuildMul(builder, unswizzled, LLVMConstVector(scales, 4), "");
+ else
+ scaled = unswizzled;
+
+ casted = LLVMBuildFPToSI(builder, scaled, LLVMVectorType(LLVMInt32Type(), 4), "");
+
+ shifted = LLVMBuildShl(builder, casted, LLVMConstVector(shifts, 4), "");
+
+ /* Bitwise or all components */
+ for (i = 0; i < 4; ++i) {
+ if (desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED) {
+ LLVMValueRef component = LLVMBuildExtractElement(builder, shifted, LLVMConstInt(LLVMInt32Type(), i, 0), "");
+ if (packed)
+ packed = LLVMBuildOr(builder, packed, component, "");
+ else
+ packed = component;
+ }
+ }
+
+ if (!packed)
+ packed = LLVMGetUndef(LLVMInt32Type());
+
+ if (desc->block.bits < 32)
+ packed = LLVMBuildTrunc(builder, packed, type, "");
+
+ return packed;
+}
+
+
+LLVMValueRef
+lp_build_load_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef ptr)
+{
+ const struct util_format_description *desc;
+ LLVMTypeRef type;
+ LLVMValueRef packed;
+
+ desc = util_format_description(format);
+
+ /* FIXME: Support more formats */
+ assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH);
+ assert(desc->block.width == 1);
+ assert(desc->block.height == 1);
+ assert(desc->block.bits <= 32);
+
+ type = LLVMIntType(desc->block.bits);
+
+ ptr = LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, 0), "");
+
+ packed = LLVMBuildLoad(builder, ptr, "");
+
+ return lp_build_unpack_rgba_aos(builder, format, packed);
+}
+
+
+void
+lp_build_store_rgba_aos(LLVMBuilderRef builder,
+ enum pipe_format format,
+ LLVMValueRef ptr,
+ LLVMValueRef rgba)
+{
+ const struct util_format_description *desc;
+ LLVMTypeRef type;
+ LLVMValueRef packed;
+
+ desc = util_format_description(format);
+
+ assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH);
+ assert(desc->block.width == 1);
+ assert(desc->block.height == 1);
+
+ type = LLVMIntType(desc->block.bits);
+
+ packed = lp_build_pack_rgba_aos(builder, format, rgba);
+
+ ptr = LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, 0), "");
+
+ LLVMBuildStore(builder, packed, ptr);
+}
+
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