src/gallium/drivers/r600/r600_llvm.c

#include "r600_llvm.h"

#include "gallivm/lp_bld_const.h"
#include "gallivm/lp_bld_intr.h"
#include "gallivm/lp_bld_gather.h"
#include "tgsi/tgsi_parse.h"
#include "util/list.h"
#include "util/u_memory.h"

#include "evergreend.h"
#include "r600_asm.h"
#include "r600_sq.h"
#include "r600_opcodes.h"
#include "r600_shader.h"
#include "r600_pipe.h"
#include "radeon_llvm.h"
#include "radeon_llvm_emit.h"
#include "radeon_elf_util.h"

#include <stdio.h>

#if defined R600_USE_LLVM || defined HAVE_OPENCL

#define CONSTANT_BUFFER_0_ADDR_SPACE 8
#define CONSTANT_BUFFER_1_ADDR_SPACE (CONSTANT_BUFFER_0_ADDR_SPACE + R600_UCP_CONST_BUFFER)
#define LLVM_R600_BUFFER_INFO_CONST_BUFFER \
	(CONSTANT_BUFFER_0_ADDR_SPACE + R600_BUFFER_INFO_CONST_BUFFER)

static LLVMValueRef llvm_load_const_buffer(
	struct lp_build_tgsi_context * bld_base,
	LLVMValueRef OffsetValue,
	unsigned ConstantAddressSpace)
{
	LLVMValueRef offset[2] = {
		LLVMConstInt(LLVMInt64TypeInContext(bld_base->base.gallivm->context), 0, false),
		OffsetValue
	};

	LLVMTypeRef const_ptr_type = LLVMPointerType(LLVMArrayType(LLVMVectorType(bld_base->base.elem_type, 4), 1024),
							ConstantAddressSpace);
	LLVMValueRef const_ptr = LLVMBuildIntToPtr(bld_base->base.gallivm->builder, lp_build_const_int32(bld_base->base.gallivm, 0), const_ptr_type, "");
	LLVMValueRef ptr = LLVMBuildGEP(bld_base->base.gallivm->builder, const_ptr, offset, 2, "");
	return LLVMBuildLoad(bld_base->base.gallivm->builder, ptr, "");
}

static LLVMValueRef llvm_fetch_const(
	struct lp_build_tgsi_context * bld_base,
	const struct tgsi_full_src_register *reg,
	enum tgsi_opcode_type type,
	unsigned swizzle)
{
	LLVMValueRef offset = lp_build_const_int32(bld_base->base.gallivm, reg->Register.Index);
	if (reg->Register.Indirect) {
		struct lp_build_tgsi_soa_context *bld = lp_soa_context(bld_base);
		LLVMValueRef index = LLVMBuildLoad(bld_base->base.gallivm->builder, bld->addr[reg->Indirect.Index][reg->Indirect.Swizzle], "");
		offset = LLVMBuildAdd(bld_base->base.gallivm->builder, offset, index, "");
	}
	unsigned ConstantAddressSpace = CONSTANT_BUFFER_0_ADDR_SPACE ;
	if (reg->Register.Dimension) {
		ConstantAddressSpace += reg->Dimension.Index;
	}
	LLVMValueRef cvecval = llvm_load_const_buffer(bld_base, offset, ConstantAddressSpace);
	LLVMValueRef cval = LLVMBuildExtractElement(bld_base->base.gallivm->builder, cvecval, lp_build_const_int32(bld_base->base.gallivm, swizzle), "");
	return bitcast(bld_base, type, cval);
}

static void llvm_load_system_value(
		struct radeon_llvm_context * ctx,
		unsigned index,
		const struct tgsi_full_declaration *decl)
{
	unsigned chan;

	switch (decl->Semantic.Name) {
	case TGSI_SEMANTIC_INSTANCEID: chan = 3; break;
	case TGSI_SEMANTIC_VERTEXID: chan = 0; break;
	default: assert(!"unknown system value");
	}

#if HAVE_LLVM >= 0x0304
	ctx->system_values[index] = LLVMBuildExtractElement(ctx->gallivm.builder,
		LLVMGetParam(ctx->main_fn, 0), lp_build_const_int32(&(ctx->gallivm), chan),
		"");
#else
	LLVMValueRef reg = lp_build_const_int32(
			ctx->soa.bld_base.base.gallivm, chan);
	ctx->system_values[index] = build_intrinsic(
			ctx->soa.bld_base.base.gallivm->builder,
			"llvm.R600.load.input",
			ctx->soa.bld_base.base.elem_type, &reg, 1,
			LLVMReadNoneAttribute);
#endif
}

#if HAVE_LLVM >= 0x0304
static LLVMValueRef
llvm_load_input_vector(
	struct radeon_llvm_context * ctx, unsigned location, unsigned ijregs,
	boolean interp)
{
		LLVMTypeRef VecType;
		LLVMValueRef Args[3] = {
			lp_build_const_int32(&(ctx->gallivm), location)
		};
		unsigned ArgCount = 1;
		if (interp) {
			VecType = LLVMVectorType(ctx->soa.bld_base.base.elem_type, 2);
			LLVMValueRef IJIndex = LLVMGetParam(ctx->main_fn, ijregs / 2);
			Args[ArgCount++] = LLVMBuildExtractElement(ctx->gallivm.builder, IJIndex,
				lp_build_const_int32(&(ctx->gallivm), 2 * (ijregs % 2)), "");
			Args[ArgCount++] = LLVMBuildExtractElement(ctx->gallivm.builder, IJIndex,
				lp_build_const_int32(&(ctx->gallivm), 2 * (ijregs % 2) + 1), "");
			LLVMValueRef HalfVec[2] = {
				build_intrinsic(ctx->gallivm.builder, "llvm.R600.interp.xy",
					VecType, Args, ArgCount, LLVMReadNoneAttribute),
				build_intrinsic(ctx->gallivm.builder, "llvm.R600.interp.zw",
					VecType, Args, ArgCount, LLVMReadNoneAttribute)
			};
			LLVMValueRef MaskInputs[4] = {
				lp_build_const_int32(&(ctx->gallivm), 0),
				lp_build_const_int32(&(ctx->gallivm), 1),
				lp_build_const_int32(&(ctx->gallivm), 2),
				lp_build_const_int32(&(ctx->gallivm), 3)
			};
			LLVMValueRef Mask = LLVMConstVector(MaskInputs, 4);
			return LLVMBuildShuffleVector(ctx->gallivm.builder, HalfVec[0], HalfVec[1],
				Mask, "");
		} else {
			VecType = LLVMVectorType(ctx->soa.bld_base.base.elem_type, 4);
			return build_intrinsic(ctx->gallivm.builder, "llvm.R600.interp.const",
				VecType, Args, ArgCount, LLVMReadNoneAttribute);
		}
}
#else
static LLVMValueRef
llvm_load_input_helper(
	struct radeon_llvm_context * ctx,
	unsigned idx, int interp, int ij_index)
{
	const struct lp_build_context * bb = &ctx->soa.bld_base.base;
	LLVMValueRef arg[2];
	int arg_count;
	const char * intrinsic;

	arg[0] = lp_build_const_int32(bb->gallivm, idx);

	if (interp) {
		intrinsic = "llvm.R600.interp.input";
		arg[1] = lp_build_const_int32(bb->gallivm, ij_index);
		arg_count = 2;
	} else {
		intrinsic = "llvm.R600.load.input";
		arg_count = 1;
	}

	return build_intrinsic(bb->gallivm->builder, intrinsic,
		bb->elem_type, &arg[0], arg_count, LLVMReadNoneAttribute);
}
#endif

#if HAVE_LLVM >= 0x0304
static LLVMValueRef
llvm_face_select_helper(
	struct radeon_llvm_context * ctx,
	LLVMValueRef face, LLVMValueRef front_color, LLVMValueRef back_color)
{
	const struct lp_build_context * bb = &ctx->soa.bld_base.base;
	LLVMValueRef is_front = LLVMBuildFCmp(
		bb->gallivm->builder, LLVMRealUGT, face,
		lp_build_const_float(bb->gallivm, 0.0f),	"");
	return LLVMBuildSelect(bb->gallivm->builder, is_front,
		front_color, back_color, "");
}
#else
static LLVMValueRef
llvm_face_select_helper(
	struct radeon_llvm_context * ctx,
	unsigned face_loc, LLVMValueRef front_color, LLVMValueRef back_color)
{
	const struct lp_build_context * bb = &ctx->soa.bld_base.base;
	LLVMValueRef face = llvm_load_input_helper(ctx, face_loc, 0, 0);
	LLVMValueRef is_front = LLVMBuildFCmp(
		bb->gallivm->builder, LLVMRealUGT, face,
		lp_build_const_float(bb->gallivm, 0.0f),	"");
	return LLVMBuildSelect(bb->gallivm->builder, is_front,
		front_color, back_color, "");
}
#endif

static void llvm_load_input(
	struct radeon_llvm_context * ctx,
	unsigned input_index,
	const struct tgsi_full_declaration *decl)
{
	const struct r600_shader_io * input = &ctx->r600_inputs[input_index];
	unsigned chan;
#if HAVE_LLVM < 0x0304
	unsigned interp = 0;
	int ij_index;
#endif
	int two_side = (ctx->two_side && input->name == TGSI_SEMANTIC_COLOR);
	LLVMValueRef v;
#if HAVE_LLVM >= 0x0304
	boolean require_interp_intrinsic = ctx->chip_class >= EVERGREEN &&
		ctx->type == TGSI_PROCESSOR_FRAGMENT;
#endif

#if HAVE_LLVM >= 0x0304
	if (require_interp_intrinsic && input->spi_sid) {
		v = llvm_load_input_vector(ctx, input->lds_pos, input->ij_index,
			(input->interpolate > 0));
	} else
		v = LLVMGetParam(ctx->main_fn, input->gpr);

	if (two_side) {
		struct r600_shader_io * back_input =
			&ctx->r600_inputs[input->back_color_input];
		LLVMValueRef v2;
		LLVMValueRef face = LLVMGetParam(ctx->main_fn, ctx->face_gpr);
		face = LLVMBuildExtractElement(ctx->gallivm.builder, face,
			lp_build_const_int32(&(ctx->gallivm), 0), "");

		if (require_interp_intrinsic && back_input->spi_sid)
			v2 = llvm_load_input_vector(ctx, back_input->lds_pos,
				back_input->ij_index, (back_input->interpolate > 0));
		else
			v2 = LLVMGetParam(ctx->main_fn, back_input->gpr);
		v = llvm_face_select_helper(ctx, face, v, v2);
	}

	for (chan = 0; chan < 4; chan++) {
		unsigned soa_index = radeon_llvm_reg_index_soa(input_index, chan);

		ctx->inputs[soa_index] = LLVMBuildExtractElement(ctx->gallivm.builder, v,
			lp_build_const_int32(&(ctx->gallivm), chan), "");

		if (input->name == TGSI_SEMANTIC_POSITION &&
				ctx->type == TGSI_PROCESSOR_FRAGMENT && chan == 3) {
		/* RCP for fragcoord.w */
		ctx->inputs[soa_index] = LLVMBuildFDiv(ctx->gallivm.builder,
				lp_build_const_float(&(ctx->gallivm), 1.0f),
				ctx->inputs[soa_index], "");
	}
}
#else
	if (ctx->chip_class >= EVERGREEN && ctx->type == TGSI_PROCESSOR_FRAGMENT &&
			input->spi_sid) {
		interp = 1;
		ij_index = (input->interpolate > 0) ? input->ij_index : -1;
	}

	for (chan = 0; chan < 4; chan++) {
		unsigned soa_index = radeon_llvm_reg_index_soa(input_index, chan);
		int loc;

		if (interp) {
			loc = 4 * input->lds_pos + chan;
		} else {
			if (input->name == TGSI_SEMANTIC_FACE)
				loc = 4 * ctx->face_gpr;
			else
				loc = 4 * input->gpr + chan;
		}

		v = llvm_load_input_helper(ctx, loc, interp, ij_index);

		if (two_side) {
			struct r600_shader_io * back_input =
					&ctx->r600_inputs[input->back_color_input];
			int back_loc = interp ? back_input->lds_pos : back_input->gpr;
			LLVMValueRef v2;

			back_loc = 4 * back_loc + chan;
			v2 = llvm_load_input_helper(ctx, back_loc, interp, ij_index);
			v = llvm_face_select_helper(ctx, 4 * ctx->face_gpr, v, v2);
		} else if (input->name == TGSI_SEMANTIC_POSITION &&
				ctx->type == TGSI_PROCESSOR_FRAGMENT && chan == 3) {
			/* RCP for fragcoord.w */
			v = LLVMBuildFDiv(ctx->gallivm.builder,
					lp_build_const_float(&(ctx->gallivm), 1.0f),
					v, "");
		}

		ctx->inputs[soa_index] = v;
	}
#endif
}

static void llvm_emit_prologue(struct lp_build_tgsi_context * bld_base)
{
	struct radeon_llvm_context * ctx = radeon_llvm_context(bld_base);
	radeon_llvm_shader_type(ctx->main_fn, ctx->type);

}

static void llvm_emit_epilogue(struct lp_build_tgsi_context * bld_base)
{
	struct radeon_llvm_context * ctx = radeon_llvm_context(bld_base);
	struct lp_build_context * base = &bld_base->base;
	struct pipe_stream_output_info * so = ctx->stream_outputs;
	unsigned i;
	unsigned next_pos = 60;
	unsigned next_param = 0;

	unsigned color_count = 0;
	boolean has_color = false;

	if (ctx->type == TGSI_PROCESSOR_VERTEX && so->num_outputs) {
		for (i = 0; i < so->num_outputs; i++) {
			unsigned register_index = so->output[i].register_index;
			unsigned start_component = so->output[i].start_component;
			unsigned num_components = so->output[i].num_components;
			unsigned dst_offset = so->output[i].dst_offset;
			unsigned chan;
			LLVMValueRef elements[4];
			if (dst_offset < start_component) {
				for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
					elements[chan] = LLVMBuildLoad(base->gallivm->builder,
						ctx->soa.outputs[register_index][(chan + start_component) % TGSI_NUM_CHANNELS], "");
				}
				start_component = 0;
			} else {
				for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
					elements[chan] = LLVMBuildLoad(base->gallivm->builder,
						ctx->soa.outputs[register_index][chan], "");
				}
			}
			LLVMValueRef output = lp_build_gather_values(base->gallivm, elements, 4);
			LLVMValueRef args[4];
			args[0] = output;
			args[1] = lp_build_const_int32(base->gallivm, dst_offset - start_component);
			args[2] = lp_build_const_int32(base->gallivm, so->output[i].output_buffer);
			args[3] = lp_build_const_int32(base->gallivm, ((1 << num_components) - 1) << start_component);
			lp_build_intrinsic(base->gallivm->builder, "llvm.R600.store.stream.output",
				LLVMVoidTypeInContext(base->gallivm->context), args, 4);
		}
	}

	/* Add the necessary export instructions */
	for (i = 0; i < ctx->output_reg_count; i++) {
		unsigned chan;
		LLVMValueRef elements[4];
		for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
			elements[chan] = LLVMBuildLoad(base->gallivm->builder,
				ctx->soa.outputs[i][chan], "");
		}
		if (ctx->alpha_to_one && ctx->type == TGSI_PROCESSOR_FRAGMENT && ctx->r600_outputs[i].name == TGSI_SEMANTIC_COLOR)
			elements[3] = lp_build_const_float(base->gallivm, 1.0f);
		LLVMValueRef output = lp_build_gather_values(base->gallivm, elements, 4);

		if (ctx->type == TGSI_PROCESSOR_VERTEX) {
			switch (ctx->r600_outputs[i].name) {
			case TGSI_SEMANTIC_POSITION:
			case TGSI_SEMANTIC_PSIZE: {
				LLVMValueRef args[3];
				args[0] = output;
				args[1] = lp_build_const_int32(base->gallivm, next_pos++);
				args[2] = lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_POS);
				build_intrinsic(
					base->gallivm->builder,
					"llvm.R600.store.swizzle",
					LLVMVoidTypeInContext(base->gallivm->context),
					args, 3, 0);
				break;
			}
			case TGSI_SEMANTIC_CLIPVERTEX: {
				LLVMValueRef args[3];
				unsigned reg_index;
				LLVMValueRef adjusted_elements[4];
				for (reg_index = 0; reg_index < 2; reg_index ++) {
					for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
						LLVMValueRef offset = lp_build_const_int32(bld_base->base.gallivm, reg_index * 4 + chan);
						LLVMValueRef base_vector = llvm_load_const_buffer(bld_base, offset, CONSTANT_BUFFER_1_ADDR_SPACE);
						args[0] = output;
						args[1] = base_vector;
						adjusted_elements[chan] = build_intrinsic(base->gallivm->builder,
							"llvm.AMDGPU.dp4", bld_base->base.elem_type,
							args, 2, LLVMReadNoneAttribute);
					}
					args[0] = lp_build_gather_values(base->gallivm,
						adjusted_elements, 4);
					args[1] = lp_build_const_int32(base->gallivm, next_pos++);
					args[2] = lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_POS);
					build_intrinsic(
						base->gallivm->builder,
						"llvm.R600.store.swizzle",
						LLVMVoidTypeInContext(base->gallivm->context),
						args, 3, 0);
				}
				break;
			}
			case TGSI_SEMANTIC_CLIPDIST : {
				LLVMValueRef args[3];
				args[0] = output;
				args[1] = lp_build_const_int32(base->gallivm, next_pos++);
				args[2] = lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_POS);
				build_intrinsic(
					base->gallivm->builder,
					"llvm.R600.store.swizzle",
					LLVMVoidTypeInContext(base->gallivm->context),
					args, 3, 0);
				args[1] = lp_build_const_int32(base->gallivm, next_param++);
				args[2] = lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PARAM);
				build_intrinsic(
					base->gallivm->builder,
					"llvm.R600.store.swizzle",
					LLVMVoidTypeInContext(base->gallivm->context),
					args, 3, 0);
				break;
			}
			case TGSI_SEMANTIC_FOG: {
				elements[0] = LLVMBuildLoad(base->gallivm->builder,
					ctx->soa.outputs[i][0], "");
				elements[1] = elements[2] = lp_build_const_float(base->gallivm, 0.0f);
				elements[3] = lp_build_const_float(base->gallivm, 1.0f);

				LLVMValueRef args[3];
				args[0] = lp_build_gather_values(base->gallivm, elements, 4);
				args[1] = lp_build_const_int32(base->gallivm, next_param++);
				args[2] = lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PARAM);
				build_intrinsic(
					base->gallivm->builder,
					"llvm.R600.store.swizzle",
					LLVMVoidTypeInContext(base->gallivm->context),
					args, 3, 0);
				break;
			}
			default: {
				LLVMValueRef args[3];
				args[0] = output;
				args[1] = lp_build_const_int32(base->gallivm, next_param++);
				args[2] = lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PARAM);
				build_intrinsic(
					base->gallivm->builder,
					"llvm.R600.store.swizzle",
					LLVMVoidTypeInContext(base->gallivm->context),
					args, 3, 0);
				break;
			}
			}
		} else if (ctx->type == TGSI_PROCESSOR_FRAGMENT) {
			switch (ctx->r600_outputs[i].name) {
			case TGSI_SEMANTIC_COLOR:
				has_color = true;
				if ( color_count < ctx->color_buffer_count) {
					LLVMValueRef args[3];
					args[0] = output;
					if (ctx->fs_color_all) {
						for (unsigned j = 0; j < ctx->color_buffer_count; j++) {
							args[1] = lp_build_const_int32(base->gallivm, j);
							args[2] = lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PIXEL);
							build_intrinsic(
								base->gallivm->builder,
								"llvm.R600.store.swizzle",
								LLVMVoidTypeInContext(base->gallivm->context),
								args, 3, 0);
						}
					} else {
						args[1] = lp_build_const_int32(base->gallivm, color_count++);
						args[2] = lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PIXEL);
						build_intrinsic(
							base->gallivm->builder,
							"llvm.R600.store.swizzle",
							LLVMVoidTypeInContext(base->gallivm->context),
							args, 3, 0);
					}
				}
				break;
			case TGSI_SEMANTIC_POSITION:
				lp_build_intrinsic_unary(
					base->gallivm->builder,
					"llvm.R600.store.pixel.depth",
					LLVMVoidTypeInContext(base->gallivm->context),
					LLVMBuildLoad(base->gallivm->builder, ctx->soa.outputs[i][2], ""));
				break;
			case TGSI_SEMANTIC_STENCIL:
				lp_build_intrinsic_unary(
					base->gallivm->builder,
					"llvm.R600.store.pixel.stencil",
					LLVMVoidTypeInContext(base->gallivm->context),
					LLVMBuildLoad(base->gallivm->builder, ctx->soa.outputs[i][1], ""));
				break;
			}
		}
	}
	// Add dummy exports
	if (ctx->type == TGSI_PROCESSOR_VERTEX) {
		if (!next_param) {
			lp_build_intrinsic_unary(base->gallivm->builder, "llvm.R600.store.dummy",
				LLVMVoidTypeInContext(base->gallivm->context),
				lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PARAM));
		}
		if (!(next_pos-60)) {
			lp_build_intrinsic_unary(base->gallivm->builder, "llvm.R600.store.dummy",
				LLVMVoidTypeInContext(base->gallivm->context),
				lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_POS));
		}
	}
	if (ctx->type == TGSI_PROCESSOR_FRAGMENT) {
		if (!has_color) {
			lp_build_intrinsic_unary(base->gallivm->builder, "llvm.R600.store.dummy",
				LLVMVoidTypeInContext(base->gallivm->context),
				lp_build_const_int32(base->gallivm, V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PIXEL));
		}
	}

}

static void llvm_emit_tex(
	const struct lp_build_tgsi_action * action,
	struct lp_build_tgsi_context * bld_base,
	struct lp_build_emit_data * emit_data)
{
	struct gallivm_state * gallivm = bld_base->base.gallivm;
	LLVMValueRef args[7];
	unsigned c, sampler_src;
	struct radeon_llvm_context * ctx = radeon_llvm_context(bld_base);

	if (emit_data->inst->Texture.Texture == TGSI_TEXTURE_BUFFER) {
		switch (emit_data->inst->Instruction.Opcode) {
		case TGSI_OPCODE_TXQ: {
			struct radeon_llvm_context * ctx = radeon_llvm_context(bld_base);
			ctx->uses_tex_buffers = true;
			bool isEgPlus = (ctx->chip_class >= EVERGREEN);
			LLVMValueRef offset = lp_build_const_int32(bld_base->base.gallivm,
				isEgPlus ? 0 : 1);
			LLVMValueRef cvecval = llvm_load_const_buffer(bld_base, offset,
				LLVM_R600_BUFFER_INFO_CONST_BUFFER);
			if (!isEgPlus) {
				LLVMValueRef maskval[4] = {
					lp_build_const_int32(gallivm, 1),
					lp_build_const_int32(gallivm, 2),
					lp_build_const_int32(gallivm, 3),
					lp_build_const_int32(gallivm, 0),
				};
				LLVMValueRef mask = LLVMConstVector(maskval, 4);
				cvecval = LLVMBuildShuffleVector(gallivm->builder, cvecval, cvecval,
					mask, "");
			}
			emit_data->output[0] = cvecval;
			return;
		}
		case TGSI_OPCODE_TXF: {
			args[0] = LLVMBuildExtractElement(gallivm->builder, emit_data->args[0], lp_build_const_int32(gallivm, 0), "");
			args[1] = lp_build_const_int32(gallivm, R600_MAX_CONST_BUFFERS);
			emit_data->output[0] = build_intrinsic(gallivm->builder,
							"llvm.R600.load.texbuf",
							emit_data->dst_type, args, 2, LLVMReadNoneAttribute);
			if (ctx->chip_class >= EVERGREEN)
				return;
			ctx->uses_tex_buffers = true;
			LLVMDumpValue(emit_data->output[0]);
			emit_data->output[0] = LLVMBuildBitCast(gallivm->builder,
				emit_data->output[0], LLVMVectorType(bld_base->base.int_elem_type, 4),
				"");
			LLVMValueRef Mask = llvm_load_const_buffer(bld_base,
				lp_build_const_int32(gallivm, 0),
				LLVM_R600_BUFFER_INFO_CONST_BUFFER);
			Mask = LLVMBuildBitCast(gallivm->builder, Mask,
				LLVMVectorType(bld_base->base.int_elem_type, 4), "");
			emit_data->output[0] = lp_build_emit_llvm_binary(bld_base, TGSI_OPCODE_AND,
				emit_data->output[0],
				Mask);
			LLVMValueRef WComponent = LLVMBuildExtractElement(gallivm->builder,
				emit_data->output[0], lp_build_const_int32(gallivm, 3), "");
			Mask = llvm_load_const_buffer(bld_base, lp_build_const_int32(gallivm, 1),
				LLVM_R600_BUFFER_INFO_CONST_BUFFER);
			Mask = LLVMBuildExtractElement(gallivm->builder, Mask,
				lp_build_const_int32(gallivm, 0), "");
			Mask = LLVMBuildBitCast(gallivm->builder, Mask,
				bld_base->base.int_elem_type, "");
			WComponent = lp_build_emit_llvm_binary(bld_base, TGSI_OPCODE_OR,
				WComponent, Mask);
			emit_data->output[0] = LLVMBuildInsertElement(gallivm->builder,
				emit_data->output[0], WComponent, lp_build_const_int32(gallivm, 3), "");
			emit_data->output[0] = LLVMBuildBitCast(gallivm->builder,
				emit_data->output[0], LLVMVectorType(bld_base->base.elem_type, 4), "");
		}
			return;
		default:
			break;
		}
	}

	if (emit_data->inst->Instruction.Opcode == TGSI_OPCODE_TEX ||
		emit_data->inst->Instruction.Opcode == TGSI_OPCODE_TXP) {
		LLVMValueRef Vector[4] = {
			LLVMBuildExtractElement(gallivm->builder, emit_data->args[0],
				lp_build_const_int32(gallivm, 0), ""),
			LLVMBuildExtractElement(gallivm->builder, emit_data->args[0],
				lp_build_const_int32(gallivm, 1), ""),
			LLVMBuildExtractElement(gallivm->builder, emit_data->args[0],
				lp_build_const_int32(gallivm, 2), ""),
			LLVMBuildExtractElement(gallivm->builder, emit_data->args[0],
				lp_build_const_int32(gallivm, 3), ""),
		};
		switch (emit_data->inst->Texture.Texture) {
		case TGSI_TEXTURE_2D:
		case TGSI_TEXTURE_RECT:
			Vector[2] = Vector[3] = LLVMGetUndef(bld_base->base.elem_type);
			break;
		case TGSI_TEXTURE_1D:
			Vector[1] = Vector[2] = Vector[3] = LLVMGetUndef(bld_base->base.elem_type);
			break;
		default:
			break;
		}
		args[0] = lp_build_gather_values(gallivm, Vector, 4);
	} else {
		args[0] = emit_data->args[0];
	}

	assert(emit_data->arg_count + 2 <= Elements(args));

	for (c = 1; c < emit_data->arg_count; ++c)
		args[c] = emit_data->args[c];

	if (emit_data->inst->Instruction.Opcode == TGSI_OPCODE_TXF) {
		args[1] = LLVMBuildShl(gallivm->builder, args[1], lp_build_const_int32(gallivm, 1), "");
		args[2] = LLVMBuildShl(gallivm->builder, args[2], lp_build_const_int32(gallivm, 1), "");
		args[3] = LLVMBuildShl(gallivm->builder, args[3], lp_build_const_int32(gallivm, 1), "");
	}

	sampler_src = emit_data->inst->Instruction.NumSrcRegs-1;

	args[c++] = lp_build_const_int32(gallivm,
					emit_data->inst->Src[sampler_src].Register.Index + R600_MAX_CONST_BUFFERS);
	args[c++] = lp_build_const_int32(gallivm,
					emit_data->inst->Src[sampler_src].Register.Index);
	args[c++] = lp_build_const_int32(gallivm,
					emit_data->inst->Texture.Texture);

	if (emit_data->inst->Instruction.Opcode == TGSI_OPCODE_TXF &&
		(emit_data->inst->Texture.Texture == TGSI_TEXTURE_2D_MSAA ||
		emit_data->inst->Texture.Texture == TGSI_TEXTURE_2D_ARRAY_MSAA)) {

		switch (emit_data->inst->Texture.Texture) {
		case TGSI_TEXTURE_2D_MSAA:
			args[6] = lp_build_const_int32(gallivm, TGSI_TEXTURE_2D);
			break;
		case TGSI_TEXTURE_2D_ARRAY_MSAA:
			args[6] = lp_build_const_int32(gallivm, TGSI_TEXTURE_2D_ARRAY);
			break;
		default:
			break;
		}

		if (ctx->has_compressed_msaa_texturing) {
			LLVMValueRef ldptr_args[10] = {
				args[0], // Coord
				args[1], // Offset X
				args[2], // Offset Y
				args[3], // Offset Z
				args[4],
				args[5],
				lp_build_const_int32(gallivm, 1),
				lp_build_const_int32(gallivm, 1),
				lp_build_const_int32(gallivm, 1),
				lp_build_const_int32(gallivm, 1)
			};
			LLVMValueRef ptr = build_intrinsic(gallivm->builder,
				"llvm.R600.ldptr",
				emit_data->dst_type, ldptr_args, 10, LLVMReadNoneAttribute);
			LLVMValueRef Tmp = LLVMBuildExtractElement(gallivm->builder, args[0],
				lp_build_const_int32(gallivm, 3), "");
			Tmp = LLVMBuildMul(gallivm->builder, Tmp,
				lp_build_const_int32(gallivm, 4), "");
			LLVMValueRef ResX = LLVMBuildExtractElement(gallivm->builder, ptr,
				lp_build_const_int32(gallivm, 0), "");
			ResX = LLVMBuildBitCast(gallivm->builder, ResX,
				bld_base->base.int_elem_type, "");
			Tmp = LLVMBuildLShr(gallivm->builder, ResX, Tmp, "");
			Tmp = LLVMBuildAnd(gallivm->builder, Tmp,
				lp_build_const_int32(gallivm, 0xF), "");
			args[0] = LLVMBuildInsertElement(gallivm->builder, args[0], Tmp,
				lp_build_const_int32(gallivm, 3), "");
			args[c++] = lp_build_const_int32(gallivm,
				emit_data->inst->Texture.Texture);
		}
	}

	emit_data->output[0] = build_intrinsic(gallivm->builder,
					action->intr_name,
					emit_data->dst_type, args, c, LLVMReadNoneAttribute);

	if (emit_data->inst->Instruction.Opcode == TGSI_OPCODE_TXQ &&
		((emit_data->inst->Texture.Texture == TGSI_TEXTURE_CUBE_ARRAY ||
		emit_data->inst->Texture.Texture == TGSI_TEXTURE_SHADOWCUBE_ARRAY)))
		if (emit_data->inst->Dst[0].Register.WriteMask & 4) {
			LLVMValueRef offset = lp_build_const_int32(bld_base->base.gallivm, 0);
			LLVMValueRef ZLayer = LLVMBuildExtractElement(gallivm->builder,
				llvm_load_const_buffer(bld_base, offset, LLVM_R600_BUFFER_INFO_CONST_BUFFER),
				lp_build_const_int32(gallivm, 0), "");

			emit_data->output[0] = LLVMBuildInsertElement(gallivm->builder, emit_data->output[0], ZLayer, lp_build_const_int32(gallivm, 2), "");
			struct radeon_llvm_context * ctx = radeon_llvm_context(bld_base);
			ctx->has_txq_cube_array_z_comp = true;
		}
}

static void emit_cndlt(
		const struct lp_build_tgsi_action * action,
		struct lp_build_tgsi_context * bld_base,
		struct lp_build_emit_data * emit_data)
{
	LLVMBuilderRef builder = bld_base->base.gallivm->builder;
	LLVMValueRef float_zero = lp_build_const_float(
		bld_base->base.gallivm, 0.0f);
	LLVMValueRef cmp = LLVMBuildFCmp(
		builder, LLVMRealULT, emit_data->args[0], float_zero, "");
	emit_data->output[emit_data->chan] = LLVMBuildSelect(builder,
		cmp, emit_data->args[1], emit_data->args[2], "");
}

static void dp_fetch_args(
	struct lp_build_tgsi_context * bld_base,
	struct lp_build_emit_data * emit_data)
{
	struct lp_build_context * base = &bld_base->base;
	unsigned chan;
	LLVMValueRef elements[2][4];
	unsigned opcode = emit_data->inst->Instruction.Opcode;
	unsigned dp_components = (opcode == TGSI_OPCODE_DP2 ? 2 :
					(opcode == TGSI_OPCODE_DP3 ? 3 : 4));
	for (chan = 0 ; chan < dp_components; chan++) {
		elements[0][chan] = lp_build_emit_fetch(bld_base,
						emit_data->inst, 0, chan);
		elements[1][chan] = lp_build_emit_fetch(bld_base,
						emit_data->inst, 1, chan);
	}

	for ( ; chan < 4; chan++) {
		elements[0][chan] = base->zero;
		elements[1][chan] = base->zero;
	}

	 /* Fix up for DPH */
	if (opcode == TGSI_OPCODE_DPH) {
		elements[0][TGSI_CHAN_W] = base->one;
	}

	emit_data->args[0] = lp_build_gather_values(bld_base->base.gallivm,
							elements[0], 4);
	emit_data->args[1] = lp_build_gather_values(bld_base->base.gallivm,
							elements[1], 4);
	emit_data->arg_count = 2;

	emit_data->dst_type = base->elem_type;
}

static struct lp_build_tgsi_action dot_action = {
	.fetch_args = dp_fetch_args,
	.emit = build_tgsi_intrinsic_nomem,
	.intr_name = "llvm.AMDGPU.dp4"
};



LLVMModuleRef r600_tgsi_llvm(
	struct radeon_llvm_context * ctx,
	const struct tgsi_token * tokens)
{
	struct tgsi_shader_info shader_info;
	struct lp_build_tgsi_context * bld_base = &ctx->soa.bld_base;
	radeon_llvm_context_init(ctx);
#if HAVE_LLVM >= 0x0304
	LLVMTypeRef Arguments[32];
	unsigned ArgumentsCount = 0;
	for (unsigned i = 0; i < ctx->inputs_count; i++)
		Arguments[ArgumentsCount++] = LLVMVectorType(bld_base->base.elem_type, 4);
	radeon_llvm_create_func(ctx, Arguments, ArgumentsCount);
	for (unsigned i = 0; i < ctx->inputs_count; i++) {
		LLVMValueRef P = LLVMGetParam(ctx->main_fn, i);
		LLVMAddAttribute(P, LLVMInRegAttribute);
	}
#else
	radeon_llvm_create_func(ctx, NULL, 0);
#endif
	tgsi_scan_shader(tokens, &shader_info);

	bld_base->info = &shader_info;
	bld_base->userdata = ctx;
	bld_base->emit_fetch_funcs[TGSI_FILE_CONSTANT] = llvm_fetch_const;
	bld_base->emit_prologue = llvm_emit_prologue;
	bld_base->emit_epilogue = llvm_emit_epilogue;
	ctx->userdata = ctx;
	ctx->load_input = llvm_load_input;
	ctx->load_system_value = llvm_load_system_value;

	bld_base->op_actions[TGSI_OPCODE_DP2] = dot_action;
	bld_base->op_actions[TGSI_OPCODE_DP3] = dot_action;
	bld_base->op_actions[TGSI_OPCODE_DP4] = dot_action;
	bld_base->op_actions[TGSI_OPCODE_DPH] = dot_action;
	bld_base->op_actions[TGSI_OPCODE_DDX].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_DDY].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TEX].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TEX2].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TXB].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TXB2].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TXD].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TXL].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TXL2].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TXF].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TXQ].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_TXP].emit = llvm_emit_tex;
	bld_base->op_actions[TGSI_OPCODE_CMP].emit = emit_cndlt;

	lp_build_tgsi_llvm(bld_base, tokens);

	radeon_llvm_finalize_module(ctx);

	return ctx->gallivm.module;
}

/* We need to define these R600 registers here, because we can't include
 * evergreend.h and r600d.h.
 */
#define R_028868_SQ_PGM_RESOURCES_VS                 0x028868
#define R_028850_SQ_PGM_RESOURCES_PS                 0x028850

void r600_shader_binary_read_config(const struct radeon_shader_binary *binary,
					struct r600_bytecode *bc,
					uint64_t symbol_offset,
					boolean *use_kill)
{
	unsigned i;
	const unsigned char *config =
		radeon_shader_binary_config_start(binary, symbol_offset);

	for (i = 0; i < binary->config_size_per_symbol; i+= 8) {
		unsigned reg =
			util_le32_to_cpu(*(uint32_t*)(config + i));
		unsigned value =
			util_le32_to_cpu(*(uint32_t*)(config + i + 4));
		switch (reg) {
		/* R600 / R700 */
		case R_028850_SQ_PGM_RESOURCES_PS:
		case R_028868_SQ_PGM_RESOURCES_VS:
		/* Evergreen / Northern Islands */
		case R_028844_SQ_PGM_RESOURCES_PS:
		case R_028860_SQ_PGM_RESOURCES_VS:
		case R_0288D4_SQ_PGM_RESOURCES_LS:
			bc->ngpr = MAX2(bc->ngpr, G_028844_NUM_GPRS(value));
			bc->nstack = MAX2(bc->nstack, G_028844_STACK_SIZE(value));
			break;
		case R_02880C_DB_SHADER_CONTROL:
			*use_kill = G_02880C_KILL_ENABLE(value);
			break;
		case CM_R_0288E8_SQ_LDS_ALLOC:
			bc->nlds_dw = value;
			break;
		}
	}

}

unsigned r600_create_shader(struct r600_bytecode *bc,
		const struct radeon_shader_binary *binary,
		boolean *use_kill)

{
	assert(binary->code_size % 4 == 0);
	bc->bytecode = CALLOC(1, binary->code_size);
	memcpy(bc->bytecode, binary->code, binary->code_size);
	bc->ndw = binary->code_size / 4;

	r600_shader_binary_read_config(binary, bc, 0, use_kill);

	return 0;
}

unsigned r600_llvm_compile(
	LLVMModuleRef mod,
	enum radeon_family family,
	struct r600_bytecode *bc,
	boolean *use_kill,
	unsigned dump)
{
	unsigned r;
	struct radeon_shader_binary binary;
	const char * gpu_family = r600_get_llvm_processor_name(family);

	memset(&binary, 0, sizeof(struct radeon_shader_binary));
	r = radeon_llvm_compile(mod, &binary, gpu_family, dump, NULL);

	r = r600_create_shader(bc, &binary, use_kill);

	FREE(binary.code);
	FREE(binary.config);
	FREE(binary.rodata);
	FREE(binary.global_symbol_offsets);

	return r;
}

#endif