#include "lp_bld_type.h"
#include "lp_bld_const.h"
#include "lp_bld_arit.h"
+#include "lp_bld_swizzle.h"
/**
enum lp_build_blend_swizzle rgb_swizzle,
unsigned alpha_swizzle)
{
- const unsigned n = bld->base.type.length;
- LLVMValueRef swizzles[LP_MAX_VECTOR_LENGTH];
- unsigned i, j;
-
if(rgb == alpha) {
if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_RGBA)
return rgb;
-
- alpha = bld->base.undef;
- }
-
- if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_RGBA &&
- !bld->base.type.floating) {
-#if 0
- /* Use a select */
- /* FIXME: Unfortunetaly select of vectors do not work */
-
- for(j = 0; j < n; j += 4)
- for(i = 0; i < 4; ++i)
- swizzles[j + i] = LLVMConstInt(LLVMInt1Type(), i == alpha_swizzle ? 0 : 1, 0);
-
- return LLVMBuildSelect(bld->base.builder, LLVMConstVector(swizzles, n), rgb, alpha, "");
-#else
- /* XXX: Use a bitmask, as byte shuffles often end up being translated
- * into many PEXTRB. Ideally LLVM X86 code generation should pick this
- * automatically for us. */
-
- for(j = 0; j < n; j += 4)
- for(i = 0; i < 4; ++i)
- swizzles[j + i] = LLVMConstInt(LLVMIntType(bld->base.type.width), i == alpha_swizzle ? 0 : ~0, 0);
-
- /* TODO: Unfortunately constant propagation prevents from using PANDN. And
- * on SSE4 we have even better -- PBLENDVB */
- return LLVMBuildOr(bld->base.builder,
- LLVMBuildAnd(bld->base.builder, rgb, LLVMConstVector(swizzles, n), ""),
- LLVMBuildAnd(bld->base.builder, alpha, LLVMBuildNot(bld->base.builder, LLVMConstVector(swizzles, n), ""), ""),
- "");
-#endif
+ if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_AAAA)
+ return lp_build_broadcast_aos(&bld->base, rgb, alpha_swizzle);
}
-
- for(j = 0; j < n; j += 4) {
- for(i = 0; i < 4; ++i) {
- unsigned swizzle;
-
- if(i == alpha_swizzle && alpha != bld->base.undef) {
- /* Take the alpha from the second shuffle argument */
- swizzle = n + j + alpha_swizzle;
- }
- else if (rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_AAAA) {
- /* Take the alpha from the first shuffle argument */
- swizzle = j + alpha_swizzle;
- }
- else {
- swizzle = j + i;
- }
-
- swizzles[j + i] = LLVMConstInt(LLVMInt32Type(), swizzle, 0);
+ else {
+ if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_RGBA) {
+ boolean cond[4] = {0, 0, 0, 0};
+ cond[alpha_swizzle] = 1;
+ return lp_build_select_aos(&bld->base, alpha, rgb, cond);
+ }
+ if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_AAAA) {
+ unsigned char swizzle[4];
+ swizzle[0] = alpha_swizzle;
+ swizzle[1] = alpha_swizzle;
+ swizzle[2] = alpha_swizzle;
+ swizzle[3] = alpha_swizzle;
+ swizzle[alpha_swizzle] += 4;
+ return lp_build_swizzle2_aos(&bld->base, rgb, alpha, swizzle);
}
}
-
- return LLVMBuildShuffleVector(bld->base.builder, rgb, alpha, LLVMConstVector(swizzles, n), "");
+ assert(0);
+ return bld->base.undef;
}
--- /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_debug.h"
+
+#include "lp_bld_type.h"
+#include "lp_bld_const.h"
+#include "lp_bld_swizzle.h"
+
+
+LLVMValueRef
+lp_build_broadcast_aos(struct lp_build_context *bld,
+ LLVMValueRef a,
+ unsigned channel)
+{
+ const union lp_type type = bld->type;
+ const unsigned n = type.length;
+ unsigned i, j;
+
+ if(a == bld->undef || a == bld->zero || a == bld->one)
+ return a;
+
+ if (n <= 4) {
+ /*
+ * Shuffle.
+ */
+ LLVMTypeRef elem_type = LLVMInt32Type();
+ LLVMValueRef shuffles[LP_MAX_VECTOR_LENGTH];
+
+ for(j = 0; j < n; j += 4)
+ for(i = 0; i < 4; ++i)
+ shuffles[j + i] = LLVMConstInt(elem_type, j + channel, 0);
+
+ return LLVMBuildShuffleVector(bld->builder, a, bld->undef, LLVMConstVector(shuffles, n), "");
+ }
+ else {
+ /*
+ * Bit mask and recursive shifts
+ *
+ * XYZW XYZW .... XYZW
+ * _Y__ _Y__ .... _Y__
+ * YY_ YY__ .... YY__
+ * YYYY YYYY .... YYYY
+ */
+ union lp_type type4 = type;
+ const char shifts[4][2] = {
+ { 1, 2},
+ {-1, 2},
+ { 1, -2},
+ {-1, -2}
+ };
+ boolean cond[4];
+ unsigned i;
+
+ memset(cond, 0, sizeof cond);
+ cond[channel] = 1;
+
+ a = LLVMBuildAnd(bld->builder, a, lp_build_const_mask_aos(type, cond), "");
+
+ type4.width *= 4;
+ type4.length /= 4;
+
+ a = LLVMBuildBitCast(bld->builder, a, lp_build_vec_type(type4), "");
+
+ for(i = 0; i < 2; ++i) {
+ LLVMValueRef tmp = NULL;
+ int shift = shifts[channel][i];
+
+#ifdef PIPE_ARCH_LITTLE_ENDIAN
+ shift = -shift;
+#endif
+
+ if(shift > 0)
+ tmp = LLVMBuildLShr(bld->builder, a, lp_build_const_shift(type4, shift*type.width), "");
+ if(shift < 0)
+ tmp = LLVMBuildShl(bld->builder, a, lp_build_const_shift(type4, -shift*type.width), "");
+
+ assert(tmp);
+ if(tmp)
+ a = LLVMBuildOr(bld->builder, a, tmp, "");
+ }
+
+ return LLVMBuildBitCast(bld->builder, a, lp_build_vec_type(type), "");
+ }
+}
+
+
+LLVMValueRef
+lp_build_select_aos(struct lp_build_context *bld,
+ LLVMValueRef a,
+ LLVMValueRef b,
+ boolean cond[4])
+{
+ const union lp_type type = bld->type;
+ const unsigned n = type.length;
+ unsigned i, j;
+
+ if(a == b)
+ return a;
+ if(cond[0] && cond[1] && cond[2] && cond[3])
+ return a;
+ if(!cond[0] && !cond[1] && !cond[2] && !cond[3])
+ return b;
+ if(a == bld->undef || b == bld->undef)
+ return bld->undef;
+
+ /*
+ * There are three major ways of accomplishing this:
+ * - with a shuffle,
+ * - with a select,
+ * - or with a bit mask.
+ *
+ * Select isn't supported for vector types yet.
+ * The flip between these is empirical and might need to be.
+ */
+ if (n <= 4) {
+ /*
+ * Shuffle.
+ */
+ LLVMTypeRef elem_type = LLVMInt32Type();
+ LLVMValueRef shuffles[LP_MAX_VECTOR_LENGTH];
+
+ for(j = 0; j < n; j += 4)
+ for(i = 0; i < 4; ++i)
+ shuffles[j + i] = LLVMConstInt(elem_type, (cond[i] ? 0 : n) + j + i, 0);
+
+ return LLVMBuildShuffleVector(bld->builder, a, b, LLVMConstVector(shuffles, n), "");
+ }
+#if 0
+ else if(0) {
+ /* FIXME: Unfortunately select of vectors do not work */
+ /* Use a select */
+ LLVMTypeRef elem_type = LLVMInt1Type();
+ LLVMValueRef cond[LP_MAX_VECTOR_LENGTH];
+
+ for(j = 0; j < n; j += 4)
+ for(i = 0; i < 4; ++i)
+ cond[j + i] = LLVMConstInt(elem_type, cond[i] ? 1 : 0, 0);
+
+ return LLVMBuildSelect(bld->builder, LLVMConstVector(cond, n), a, b, "");
+ }
+#endif
+ else {
+ LLVMValueRef mask = lp_build_const_mask_aos(type, cond);
+
+ /* TODO: On SSE4 we could do this with a single instruction -- PBLENDVB */
+
+ a = LLVMBuildAnd(bld->builder, a, mask, "");
+
+ /* This often gets translated to PANDN, but sometimes the NOT is
+ * pre-computed and stored in another constant. The best strategy depends
+ * on available registers, so it is not a big deal -- hopefully LLVM does
+ * the right decision attending the rest of the program.
+ */
+ b = LLVMBuildAnd(bld->builder, b, LLVMBuildNot(bld->builder, mask, ""), "");
+
+ return LLVMBuildOr(bld->builder, a, b, "");
+ }
+}
+
+
+LLVMValueRef
+lp_build_swizzle1_aos(struct lp_build_context *bld,
+ LLVMValueRef a,
+ unsigned char swizzle[4])
+{
+ const unsigned n = bld->type.length;
+ unsigned i, j;
+
+ if(a == bld->undef || a == bld->zero || a == bld->one)
+ return a;
+
+ if(swizzle[0] == swizzle[1] && swizzle[1] == swizzle[2] && swizzle[2] == swizzle[3])
+ return lp_build_broadcast_aos(bld, a, swizzle[0]);
+
+ {
+ /*
+ * Shuffle.
+ */
+ LLVMTypeRef elem_type = LLVMInt32Type();
+ LLVMValueRef shuffles[LP_MAX_VECTOR_LENGTH];
+
+ for(j = 0; j < n; j += 4)
+ for(i = 0; i < 4; ++i)
+ shuffles[j + i] = LLVMConstInt(elem_type, j + swizzle[i], 0);
+
+ return LLVMBuildShuffleVector(bld->builder, a, bld->undef, LLVMConstVector(shuffles, n), "");
+ }
+}
+
+
+LLVMValueRef
+lp_build_swizzle2_aos(struct lp_build_context *bld,
+ LLVMValueRef a,
+ LLVMValueRef b,
+ unsigned char swizzle[4])
+{
+ const unsigned n = bld->type.length;
+ unsigned i, j;
+
+ if(swizzle[0] < 4 && swizzle[1] < 4 && swizzle[2] < 4 && swizzle[3] < 4)
+ return lp_build_swizzle1_aos(bld, a, swizzle);
+
+ if(a == b) {
+ swizzle[0] %= 4;
+ swizzle[1] %= 4;
+ swizzle[2] %= 4;
+ swizzle[3] %= 4;
+ return lp_build_swizzle1_aos(bld, a, swizzle);
+ }
+
+ if(swizzle[0] % 4 == 0 &&
+ swizzle[1] % 4 == 1 &&
+ swizzle[2] % 4 == 2 &&
+ swizzle[3] % 4 == 3) {
+ boolean cond[4];
+ cond[0] = swizzle[0] / 4;
+ cond[1] = swizzle[1] / 4;
+ cond[2] = swizzle[2] / 4;
+ cond[3] = swizzle[3] / 4;
+ return lp_build_select_aos(bld, a, b, cond);
+ }
+
+ {
+ /*
+ * Shuffle.
+ */
+ LLVMTypeRef elem_type = LLVMInt32Type();
+ LLVMValueRef shuffles[LP_MAX_VECTOR_LENGTH];
+
+ for(j = 0; j < n; j += 4)
+ for(i = 0; i < 4; ++i)
+ shuffles[j + i] = LLVMConstInt(elem_type, j + (swizzle[i] % 4) + (swizzle[i] / 4 * n), 0);
+
+ return LLVMBuildShuffleVector(bld->builder, a, b, LLVMConstVector(shuffles, n), "");
+ }
+}
+
+
--- /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.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Helper functions for constant building.
+ *
+ * @author Jose Fonseca <jfonseca@vmware.com>
+ */
+
+
+#ifndef LP_BLD_SWIZZLE_H
+#define LP_BLD_SWIZZLE_H
+
+
+#include <llvm-c/Core.h>
+
+
+union lp_type type;
+struct lp_build_context;
+
+
+/**
+ * Broadcast one channel of a vector composed of arrays of XYZW structures into
+ * all four channel.
+ */
+LLVMValueRef
+lp_build_broadcast_aos(struct lp_build_context *bld,
+ LLVMValueRef a,
+ unsigned channel);
+
+
+LLVMValueRef
+lp_build_select_aos(struct lp_build_context *bld,
+ LLVMValueRef a,
+ LLVMValueRef b,
+ boolean cond[4]);
+
+
+/**
+ * Swizzle a vector consisting of an array of XYZW structs.
+ *
+ * @param swizzle is the in [0,4[ range.
+ */
+LLVMValueRef
+lp_build_swizzle1_aos(struct lp_build_context *bld,
+ LLVMValueRef a,
+ unsigned char swizzle[4]);
+
+
+/**
+ * Swizzle two vector consisting of an array of XYZW structs.
+ *
+ * @param swizzle is the in [0,8[ range. Values in [4,8[ range refer to b.
+ */
+LLVMValueRef
+lp_build_swizzle2_aos(struct lp_build_context *bld,
+ LLVMValueRef a,
+ LLVMValueRef b,
+ unsigned char swizzle[4]);
+
+
+#endif /* !LP_BLD_SWIZZLE_H */
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