*
**************************************************************************/
+/**
+ * @file
+ * Code generate the whole fragment pipeline.
+ *
+ * The fragment pipeline consists of the following stages:
+ * - stipple (TBI)
+ * - early depth test
+ * - fragment shader
+ * - alpha test
+ * - depth/stencil test (stencil TBI)
+ * - blending
+ *
+ * This file has only the glue to assembly the fragment pipeline. The actual
+ * plumbing of converting Gallium state into LLVM IR is done elsewhere, in the
+ * lp_bld_*.[ch] files, and in a complete generic and reusable way. Here we
+ * muster the LLVM JIT execution engine to create a function that follows an
+ * established binary interface and that can be called from C directly.
+ *
+ * A big source of complexity here is that we often want to run different
+ * stages with different precisions and data types and precisions. For example,
+ * the fragment shader needs typically to be done in floats, but the
+ * depth/stencil test and blending is better done in the type that most closely
+ * matches the depth/stencil and color buffer respectively.
+ *
+ * Since the width of a SIMD vector register stays the same regardless of the
+ * element type, different types imply different number of elements, so we must
+ * code generate more instances of the stages with larger types to be able to
+ * feed/consume the stages with smaller types.
+ *
+ * @author Jose Fonseca <jfonseca@vmware.com>
+ */
+
#include "pipe/p_defines.h"
#include "util/u_memory.h"
+#include "util/u_format.h"
+#include "util/u_debug_dump.h"
#include "pipe/internal/p_winsys_screen.h"
#include "pipe/p_shader_tokens.h"
#include "draw/draw_context.h"
#include "tgsi/tgsi_scan.h"
#include "tgsi/tgsi_parse.h"
#include "lp_bld_type.h"
+#include "lp_bld_const.h"
+#include "lp_bld_conv.h"
+#include "lp_bld_intr.h"
+#include "lp_bld_logic.h"
+#include "lp_bld_depth.h"
+#include "lp_bld_interp.h"
#include "lp_bld_tgsi.h"
+#include "lp_bld_alpha.h"
+#include "lp_bld_blend.h"
+#include "lp_bld_swizzle.h"
+#include "lp_bld_flow.h"
+#include "lp_bld_debug.h"
#include "lp_screen.h"
#include "lp_context.h"
#include "lp_state.h"
#include "lp_quad.h"
+#include "lp_tex_sample.h"
+
+
+static const unsigned char quad_offset_x[4] = {0, 1, 0, 1};
+static const unsigned char quad_offset_y[4] = {0, 0, 1, 1};
+
+
+/*
+ * Derive from the quad's upper left scalar coordinates the coordinates for
+ * all other quad pixels
+ */
+static void
+generate_pos0(LLVMBuilderRef builder,
+ LLVMValueRef x,
+ LLVMValueRef y,
+ LLVMValueRef *x0,
+ LLVMValueRef *y0)
+{
+ LLVMTypeRef int_elem_type = LLVMInt32Type();
+ LLVMTypeRef int_vec_type = LLVMVectorType(int_elem_type, QUAD_SIZE);
+ LLVMTypeRef elem_type = LLVMFloatType();
+ LLVMTypeRef vec_type = LLVMVectorType(elem_type, QUAD_SIZE);
+ LLVMValueRef x_offsets[QUAD_SIZE];
+ LLVMValueRef y_offsets[QUAD_SIZE];
+ unsigned i;
+
+ x = lp_build_broadcast(builder, int_vec_type, x);
+ y = lp_build_broadcast(builder, int_vec_type, y);
+
+ for(i = 0; i < QUAD_SIZE; ++i) {
+ x_offsets[i] = LLVMConstInt(int_elem_type, quad_offset_x[i], 0);
+ y_offsets[i] = LLVMConstInt(int_elem_type, quad_offset_y[i], 0);
+ }
+
+ x = LLVMBuildAdd(builder, x, LLVMConstVector(x_offsets, QUAD_SIZE), "");
+ y = LLVMBuildAdd(builder, y, LLVMConstVector(y_offsets, QUAD_SIZE), "");
+
+ *x0 = LLVMBuildSIToFP(builder, x, vec_type, "");
+ *y0 = LLVMBuildSIToFP(builder, y, vec_type, "");
+}
+
+
+/**
+ * Generate the depth test.
+ */
+static void
+generate_depth(LLVMBuilderRef builder,
+ const struct lp_fragment_shader_variant_key *key,
+ union lp_type src_type,
+ struct lp_build_mask_context *mask,
+ LLVMValueRef src,
+ LLVMValueRef dst_ptr)
+{
+ const struct util_format_description *format_desc;
+ union lp_type dst_type;
+
+ if(!key->depth.enabled)
+ return;
+
+ format_desc = util_format_description(key->zsbuf_format);
+ assert(format_desc);
+
+ /* Pick the depth type. */
+ dst_type = lp_depth_type(format_desc, src_type.width*src_type.length);
+
+ /* FIXME: Cope with a depth test type with a different bit width. */
+ assert(dst_type.width == src_type.width);
+ assert(dst_type.length == src_type.length);
+
+#if 1
+ src = lp_build_clamped_float_to_unsigned_norm(builder,
+ src_type,
+ dst_type.width,
+ src);
+#else
+ lp_build_conv(builder, src_type, dst_type, &src, 1, &src, 1);
+#endif
+
+ lp_build_depth_test(builder,
+ &key->depth,
+ dst_type,
+ format_desc,
+ mask,
+ src,
+ dst_ptr);
+}
+/**
+ * Generate the fragment shader, depth/stencil test, and alpha tests.
+ */
static void
-shader_generate(struct llvmpipe_screen *screen,
- struct lp_fragment_shader *shader)
+generate_fs(struct llvmpipe_context *lp,
+ struct lp_fragment_shader *shader,
+ const struct lp_fragment_shader_variant_key *key,
+ LLVMBuilderRef builder,
+ union lp_type type,
+ LLVMValueRef context_ptr,
+ unsigned i,
+ const struct lp_build_interp_soa_context *interp,
+ struct lp_build_sampler_soa *sampler,
+ LLVMValueRef *pmask,
+ LLVMValueRef *color,
+ LLVMValueRef depth_ptr)
{
const struct tgsi_token *tokens = shader->base.tokens;
- union lp_type type;
LLVMTypeRef elem_type;
LLVMTypeRef vec_type;
- LLVMTypeRef arg_types[7];
- LLVMTypeRef func_type;
- LLVMValueRef pos_ptr;
- LLVMValueRef a0_ptr;
- LLVMValueRef dadx_ptr;
- LLVMValueRef dady_ptr;
+ LLVMTypeRef int_vec_type;
LLVMValueRef consts_ptr;
- LLVMValueRef outputs_ptr;
- LLVMValueRef samplers_ptr;
- LLVMBasicBlockRef block;
- LLVMBuilderRef builder;
- LLVMValueRef pos[NUM_CHANNELS];
LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][NUM_CHANNELS];
- char name[32];
- unsigned i, j;
-
- type.value = 0;
- type.floating = TRUE;
- type.sign = TRUE;
- type.norm = FALSE;
- type.width = 32;
- type.length = 4;
+ LLVMValueRef z = interp->pos[2];
+ struct lp_build_flow_context *flow;
+ struct lp_build_mask_context mask;
+ boolean early_depth_test;
+ unsigned attrib;
+ unsigned chan;
elem_type = lp_build_elem_type(type);
vec_type = lp_build_vec_type(type);
+ int_vec_type = lp_build_int_vec_type(type);
- arg_types[0] = LLVMPointerType(vec_type, 0); /* pos */
- arg_types[1] = LLVMPointerType(vec_type, 0); /* a0 */
- arg_types[2] = LLVMPointerType(vec_type, 0); /* dadx */
- arg_types[3] = LLVMPointerType(vec_type, 0); /* dady */
- arg_types[4] = LLVMPointerType(elem_type, 0); /* consts */
- arg_types[5] = LLVMPointerType(vec_type, 0); /* outputs */
- arg_types[6] = LLVMPointerType(LLVMInt8Type(), 0); /* samplers */
-
- func_type = LLVMFunctionType(LLVMVoidType(), arg_types, Elements(arg_types), 0);
-
- shader->function = LLVMAddFunction(screen->module, "shader", func_type);
- LLVMSetFunctionCallConv(shader->function, LLVMCCallConv);
-
- pos_ptr = LLVMGetParam(shader->function, 0);
- a0_ptr = LLVMGetParam(shader->function, 1);
- dadx_ptr = LLVMGetParam(shader->function, 2);
- dady_ptr = LLVMGetParam(shader->function, 3);
- consts_ptr = LLVMGetParam(shader->function, 4);
- outputs_ptr = LLVMGetParam(shader->function, 5);
- samplers_ptr = LLVMGetParam(shader->function, 6);
-
- LLVMSetValueName(pos_ptr, "pos");
- LLVMSetValueName(a0_ptr, "a0");
- LLVMSetValueName(dadx_ptr, "dadx");
- LLVMSetValueName(dady_ptr, "dady");
- LLVMSetValueName(consts_ptr, "consts");
- LLVMSetValueName(outputs_ptr, "outputs");
- LLVMSetValueName(samplers_ptr, "samplers");
-
- block = LLVMAppendBasicBlock(shader->function, "entry");
- builder = LLVMCreateBuilder();
- LLVMPositionBuilderAtEnd(builder, block);
+ consts_ptr = lp_jit_context_constants(builder, context_ptr);
- for(j = 0; j < NUM_CHANNELS; ++j) {
- LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), j, 0);
- util_snprintf(name, sizeof name, "pos.%c", "xyzw"[j]);
- pos[j] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, pos_ptr, &index, 1, ""), name);
- }
+ flow = lp_build_flow_create(builder);
memset(outputs, 0, sizeof outputs);
- lp_build_tgsi_soa(builder, tokens, type,
- pos, a0_ptr, dadx_ptr, dady_ptr,
- consts_ptr, outputs, samplers_ptr);
+ lp_build_flow_scope_begin(flow);
+
+ /* Declare the color and z variables */
+ for (attrib = 0; attrib < shader->info.num_outputs; ++attrib) {
+ for(chan = 0; chan < NUM_CHANNELS; ++chan) {
+ boolean declare = FALSE;
+ switch (shader->info.output_semantic_name[attrib]) {
+ case TGSI_SEMANTIC_COLOR:
+ declare = TRUE;
+ break;
+ case TGSI_SEMANTIC_POSITION:
+ if(chan == 2)
+ declare = TRUE;
+ break;
+ }
+ if(declare) {
+ outputs[attrib][chan] = LLVMGetUndef(vec_type);
+ lp_build_flow_scope_declare(flow, &outputs[attrib][chan]);
+ }
+ }
+ }
- for(i = 0; i < PIPE_MAX_SHADER_OUTPUTS; ++i) {
- for(j = 0; j < NUM_CHANNELS; ++j) {
- if(outputs[i][j]) {
- LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), i*NUM_CHANNELS + j, 0);
- util_snprintf(name, sizeof name, "output%u.%c", i, "xyzw"[j]);
- LLVMBuildStore(builder, outputs[i][j], LLVMBuildGEP(builder, outputs_ptr, &index, 1, name));
+ lp_build_mask_begin(&mask, flow, type, *pmask);
+
+ early_depth_test =
+ key->depth.enabled &&
+ !key->alpha.enabled &&
+ !shader->info.uses_kill &&
+ !shader->info.writes_z;
+
+ if(early_depth_test)
+ generate_depth(builder, key,
+ type, &mask,
+ z, depth_ptr);
+
+ lp_build_tgsi_soa(builder, tokens, type, &mask,
+ consts_ptr, interp->pos, interp->inputs,
+ outputs, sampler);
+
+ if(!early_depth_test)
+ generate_depth(builder, key,
+ type, &mask,
+ z, depth_ptr);
+
+ lp_build_mask_end(&mask);
+
+ lp_build_flow_scope_end(flow);
+
+ for (attrib = 0; attrib < shader->info.num_outputs; ++attrib) {
+ for(chan = 0; chan < NUM_CHANNELS; ++chan) {
+ if(outputs[attrib][chan]) {
+ lp_build_name(outputs[attrib][chan], "output%u.%u.%c", i, attrib, "xyzw"[chan]);
+
+ switch (shader->info.output_semantic_name[attrib]) {
+ case TGSI_SEMANTIC_COLOR:
+ {
+ unsigned cbuf = shader->info.output_semantic_index[attrib];
+
+ lp_build_name(outputs[attrib][chan], "color%u.%u.%c", i, attrib, "rgba"[chan]);
+
+ /* Alpha test */
+ /* XXX: should the alpha reference value be passed separately? */
+ if(cbuf == 0 && chan == 3) {
+ LLVMValueRef alpha = outputs[attrib][chan];
+ LLVMValueRef alpha_ref_value;
+ alpha_ref_value = lp_jit_context_alpha_ref_value(builder, context_ptr);
+ alpha_ref_value = lp_build_broadcast(builder, vec_type, alpha_ref_value);
+ lp_build_alpha_test(builder, &key->alpha, type,
+ &mask, alpha, alpha_ref_value);
+ }
+
+ if(cbuf == 0)
+ color[chan] = outputs[attrib][chan];
+
+ break;
+ }
+
+ case TGSI_SEMANTIC_POSITION:
+ if(chan == 2)
+ z = outputs[attrib][chan];
+ break;
+ }
}
}
}
- LLVMBuildRetVoid(builder);;
+ lp_build_flow_destroy(flow);
+
+ *pmask = mask.value;
- LLVMDisposeBuilder(builder);
}
-void *
-llvmpipe_create_fs_state(struct pipe_context *pipe,
- const struct pipe_shader_state *templ)
+/**
+ * Generate color blending and color output.
+ */
+static void
+generate_blend(const struct pipe_blend_state *blend,
+ LLVMBuilderRef builder,
+ union lp_type type,
+ LLVMValueRef context_ptr,
+ LLVMValueRef mask,
+ LLVMValueRef *src,
+ LLVMValueRef dst_ptr)
{
- struct llvmpipe_screen *screen = llvmpipe_screen(pipe->screen);
- struct lp_fragment_shader *shader;
- LLVMValueRef fetch_texel;
+ struct lp_build_context bld;
+ LLVMTypeRef vec_type;
+ LLVMTypeRef int_vec_type;
+ LLVMValueRef const_ptr;
+ LLVMValueRef con[4];
+ LLVMValueRef dst[4];
+ LLVMValueRef res[4];
+ unsigned chan;
- shader = CALLOC_STRUCT(lp_fragment_shader);
- if (!shader)
- return NULL;
+ vec_type = lp_build_vec_type(type);
+ int_vec_type = lp_build_int_vec_type(type);
- /* get/save the summary info for this shader */
- tgsi_scan_shader(templ->tokens, &shader->info);
+ lp_build_context_init(&bld, builder, type);
- /* we need to keep a local copy of the tokens */
- shader->base.tokens = tgsi_dup_tokens(templ->tokens);
+ const_ptr = lp_jit_context_blend_color(builder, context_ptr);
+ const_ptr = LLVMBuildBitCast(builder, const_ptr,
+ LLVMPointerType(vec_type, 0), "");
+
+ for(chan = 0; chan < 4; ++chan) {
+ LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), chan, 0);
+ con[chan] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, const_ptr, &index, 1, ""), "");
+
+ dst[chan] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, dst_ptr, &index, 1, ""), "");
+
+ lp_build_name(con[chan], "con.%c", "rgba"[chan]);
+ lp_build_name(dst[chan], "dst.%c", "rgba"[chan]);
+ }
+
+ lp_build_blend_soa(builder, blend, type, src, dst, con, res);
- shader->screen = screen;
+ for(chan = 0; chan < 4; ++chan) {
+ LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), chan, 0);
+ lp_build_name(res[chan], "res.%c", "rgba"[chan]);
+ res[chan] = lp_build_select(&bld, mask, res[chan], dst[chan]);
+ LLVMBuildStore(builder, res[chan], LLVMBuildGEP(builder, dst_ptr, &index, 1, ""));
+ }
+}
+
+
+/**
+ * Generate the runtime callable function for the whole fragment pipeline.
+ */
+static struct lp_fragment_shader_variant *
+generate_fragment(struct llvmpipe_context *lp,
+ struct lp_fragment_shader *shader,
+ const struct lp_fragment_shader_variant_key *key)
+{
+ struct llvmpipe_screen *screen = llvmpipe_screen(lp->pipe.screen);
+ struct lp_fragment_shader_variant *variant;
+ union lp_type fs_type;
+ union lp_type blend_type;
+ LLVMTypeRef fs_elem_type;
+ LLVMTypeRef fs_vec_type;
+ LLVMTypeRef fs_int_vec_type;
+ LLVMTypeRef blend_vec_type;
+ LLVMTypeRef blend_int_vec_type;
+ LLVMTypeRef arg_types[9];
+ LLVMTypeRef func_type;
+ LLVMValueRef context_ptr;
+ LLVMValueRef x;
+ LLVMValueRef y;
+ LLVMValueRef a0_ptr;
+ LLVMValueRef dadx_ptr;
+ LLVMValueRef dady_ptr;
+ LLVMValueRef mask_ptr;
+ LLVMValueRef color_ptr;
+ LLVMValueRef depth_ptr;
+ LLVMBasicBlockRef block;
+ LLVMBuilderRef builder;
+ LLVMValueRef x0;
+ LLVMValueRef y0;
+ struct lp_build_sampler_soa *sampler;
+ struct lp_build_interp_soa_context interp;
+ LLVMValueRef fs_mask[LP_MAX_VECTOR_LENGTH];
+ LLVMValueRef fs_out_color[NUM_CHANNELS][LP_MAX_VECTOR_LENGTH];
+ LLVMValueRef blend_mask;
+ LLVMValueRef blend_in_color[NUM_CHANNELS];
+ unsigned num_fs;
+ unsigned i;
+ unsigned chan;
#ifdef DEBUG
- tgsi_dump(templ->tokens, 0);
+ tgsi_dump(shader->base.tokens, 0);
+ if(key->depth.enabled) {
+ debug_printf("depth.func = %s\n", debug_dump_func(key->depth.func, TRUE));
+ debug_printf("depth.writemask = %u\n", key->depth.writemask);
+ debug_printf("depth.occlusion_count = %u\n", key->depth.occlusion_count);
+ }
+ if(key->alpha.enabled) {
+ debug_printf("alpha.func = %s\n", debug_dump_func(key->alpha.func, TRUE));
+ debug_printf("alpha.ref_value = %f\n", key->alpha.ref_value);
+ }
+ if(key->blend.logicop_enable) {
+ debug_printf("blend.logicop_func = %u\n", key->blend.logicop_func);
+ }
+ else if(key->blend.blend_enable) {
+ debug_printf("blend.rgb_func = %s\n", debug_dump_blend_func (key->blend.rgb_func, TRUE));
+ debug_printf("rgb_src_factor = %s\n", debug_dump_blend_factor(key->blend.rgb_src_factor, TRUE));
+ debug_printf("rgb_dst_factor = %s\n", debug_dump_blend_factor(key->blend.rgb_dst_factor, TRUE));
+ debug_printf("alpha_func = %s\n", debug_dump_blend_func (key->blend.alpha_func, TRUE));
+ debug_printf("alpha_src_factor = %s\n", debug_dump_blend_factor(key->blend.alpha_src_factor, TRUE));
+ debug_printf("alpha_dst_factor = %s\n", debug_dump_blend_factor(key->blend.alpha_dst_factor, TRUE));
+ }
+ debug_printf("blend.colormask = 0x%x\n", key->blend.colormask);
#endif
- shader_generate(screen, shader);
+ variant = CALLOC_STRUCT(lp_fragment_shader_variant);
+ if(!variant)
+ return NULL;
+
+ variant->shader = shader;
+ memcpy(&variant->key, key, sizeof *key);
+
+ /* TODO: actually pick these based on the fs and color buffer
+ * characteristics. */
+
+ fs_type.value = 0;
+ fs_type.floating = TRUE; /* floating point values */
+ fs_type.sign = TRUE; /* values are signed */
+ fs_type.norm = FALSE; /* values are not limited to [0,1] or [-1,1] */
+ fs_type.width = 32; /* 32-bit float */
+ fs_type.length = 4; /* 4 element per vector */
+ num_fs = 4;
+
+ blend_type.value = 0;
+ blend_type.floating = FALSE; /* values are integers */
+ blend_type.sign = FALSE; /* values are unsigned */
+ blend_type.norm = TRUE; /* values are in [0,1] or [-1,1] */
+ blend_type.width = 8; /* 8-bit ubyte values */
+ blend_type.length = 16; /* 16 elements per vector */
+
+ /*
+ * Generate the function prototype. Any change here must be reflected in
+ * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
+ */
- LLVMRunFunctionPassManager(screen->pass, shader->function);
+ fs_elem_type = lp_build_elem_type(fs_type);
+ fs_vec_type = lp_build_vec_type(fs_type);
+ fs_int_vec_type = lp_build_int_vec_type(fs_type);
-#ifdef DEBUG
- LLVMDumpValue(shader->function);
- debug_printf("\n");
+ blend_vec_type = lp_build_vec_type(blend_type);
+ blend_int_vec_type = lp_build_int_vec_type(blend_type);
+
+ arg_types[0] = screen->context_ptr_type; /* context */
+ arg_types[1] = LLVMInt32Type(); /* x */
+ arg_types[2] = LLVMInt32Type(); /* y */
+ arg_types[3] = LLVMPointerType(fs_elem_type, 0); /* a0 */
+ arg_types[4] = LLVMPointerType(fs_elem_type, 0); /* dadx */
+ arg_types[5] = LLVMPointerType(fs_elem_type, 0); /* dady */
+ arg_types[6] = LLVMPointerType(fs_int_vec_type, 0); /* mask */
+ arg_types[7] = LLVMPointerType(blend_vec_type, 0); /* color */
+ arg_types[8] = LLVMPointerType(fs_int_vec_type, 0); /* depth */
+
+ func_type = LLVMFunctionType(LLVMVoidType(), arg_types, Elements(arg_types), 0);
+
+ variant->function = LLVMAddFunction(screen->module, "shader", func_type);
+ LLVMSetFunctionCallConv(variant->function, LLVMCCallConv);
+ for(i = 0; i < Elements(arg_types); ++i)
+ if(LLVMGetTypeKind(arg_types[i]) == LLVMPointerTypeKind)
+ LLVMAddAttribute(LLVMGetParam(variant->function, i), LLVMNoAliasAttribute);
+
+ context_ptr = LLVMGetParam(variant->function, 0);
+ x = LLVMGetParam(variant->function, 1);
+ y = LLVMGetParam(variant->function, 2);
+ a0_ptr = LLVMGetParam(variant->function, 3);
+ dadx_ptr = LLVMGetParam(variant->function, 4);
+ dady_ptr = LLVMGetParam(variant->function, 5);
+ mask_ptr = LLVMGetParam(variant->function, 6);
+ color_ptr = LLVMGetParam(variant->function, 7);
+ depth_ptr = LLVMGetParam(variant->function, 8);
+
+ lp_build_name(context_ptr, "context");
+ lp_build_name(x, "x");
+ lp_build_name(y, "y");
+ lp_build_name(a0_ptr, "a0");
+ lp_build_name(dadx_ptr, "dadx");
+ lp_build_name(dady_ptr, "dady");
+ lp_build_name(mask_ptr, "mask");
+ lp_build_name(color_ptr, "color");
+ lp_build_name(depth_ptr, "depth");
+
+ /*
+ * Function body
+ */
+
+ block = LLVMAppendBasicBlock(variant->function, "entry");
+ builder = LLVMCreateBuilder();
+ LLVMPositionBuilderAtEnd(builder, block);
+
+ generate_pos0(builder, x, y, &x0, &y0);
+
+ lp_build_interp_soa_init(&interp, shader->base.tokens, builder, fs_type,
+ a0_ptr, dadx_ptr, dady_ptr,
+ x0, y0, 2, 0);
+
+#if 0
+ /* C texture sampling */
+ sampler = lp_c_sampler_soa_create(context_ptr);
+#else
+ /* code generated texture sampling */
+ sampler = lp_llvm_sampler_soa_create(key->sampler, context_ptr);
#endif
- if(LLVMVerifyFunction(shader->function, LLVMPrintMessageAction)) {
- LLVMDumpValue(shader->function);
- abort();
+ for(i = 0; i < num_fs; ++i) {
+ LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), i, 0);
+ LLVMValueRef out_color[NUM_CHANNELS];
+ LLVMValueRef depth_ptr_i;
+
+ if(i != 0)
+ lp_build_interp_soa_update(&interp);
+
+ fs_mask[i] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, mask_ptr, &index, 1, ""), "");
+ depth_ptr_i = LLVMBuildGEP(builder, depth_ptr, &index, 1, "");
+
+ generate_fs(lp, shader, key,
+ builder,
+ fs_type,
+ context_ptr,
+ i,
+ &interp,
+ sampler,
+ &fs_mask[i],
+ out_color,
+ depth_ptr_i);
+
+ for(chan = 0; chan < NUM_CHANNELS; ++chan)
+ fs_out_color[chan][i] = out_color[chan];
}
- fetch_texel = LLVMGetNamedFunction(screen->module, "fetch_texel");
- if(fetch_texel) {
- static boolean first_time = TRUE;
- if(first_time) {
- LLVMAddGlobalMapping(screen->engine, fetch_texel, lp_build_tgsi_fetch_texel_soa);
- first_time = FALSE;
- }
+ sampler->destroy(sampler);
+
+ /*
+ * Convert the fs's output color and mask to fit to the blending type.
+ */
+
+ for(chan = 0; chan < NUM_CHANNELS; ++chan) {
+ lp_build_conv(builder, fs_type, blend_type,
+ fs_out_color[chan], num_fs,
+ &blend_in_color[chan], 1);
+ lp_build_name(blend_in_color[chan], "color.%c", "rgba"[chan]);
+
}
- shader->jit_function = (lp_shader_fs_func)LLVMGetPointerToGlobal(screen->engine, shader->function);
+ lp_build_conv_mask(builder, fs_type, blend_type,
+ fs_mask, num_fs,
+ &blend_mask, 1);
- return shader;
-}
+ /*
+ * Blending.
+ */
+ generate_blend(&key->blend,
+ builder,
+ blend_type,
+ context_ptr,
+ blend_mask,
+ blend_in_color,
+ color_ptr);
-void
-llvmpipe_bind_fs_state(struct pipe_context *pipe, void *fs)
-{
- struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
+ LLVMBuildRetVoid(builder);
- llvmpipe->fs = (struct lp_fragment_shader *) fs;
+ LLVMDisposeBuilder(builder);
- llvmpipe->dirty |= LP_NEW_FS;
-}
+ /*
+ * Translate the LLVM IR into machine code.
+ */
+ LLVMRunFunctionPassManager(screen->pass, variant->function);
-void
-llvmpipe_delete_fs_state(struct pipe_context *pipe, void *fs)
-{
- struct lp_fragment_shader *shader = fs;
- struct llvmpipe_screen *screen = shader->screen;
-
- assert(fs != llvmpipe_context(pipe)->fs);
-
- if(shader->function) {
- if(shader->jit_function)
- LLVMFreeMachineCodeForFunction(screen->engine, shader->function);
- LLVMDeleteFunction(shader->function);
+#ifdef DEBUG
+ LLVMDumpValue(variant->function);
+ debug_printf("\n");
+#endif
+
+ if(LLVMVerifyFunction(variant->function, LLVMPrintMessageAction)) {
+ LLVMDumpValue(variant->function);
+ abort();
}
- FREE((void *) shader->base.tokens);
- FREE(shader);
+ variant->jit_function = (lp_jit_frag_func)LLVMGetPointerToGlobal(screen->engine, variant->function);
+
+#ifdef DEBUG
+ lp_disassemble(variant->jit_function);
+#endif
+
+ variant->next = shader->variants;
+ shader->variants = variant;
+
+ return variant;
}
void *
-llvmpipe_create_vs_state(struct pipe_context *pipe,
+llvmpipe_create_fs_state(struct pipe_context *pipe,
const struct pipe_shader_state *templ)
{
- struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
- struct lp_vertex_shader *state;
-
- state = CALLOC_STRUCT(lp_vertex_shader);
- if (state == NULL )
- goto fail;
+ struct lp_fragment_shader *shader;
- /* copy shader tokens, the ones passed in will go away.
- */
- state->shader.tokens = tgsi_dup_tokens(templ->tokens);
- if (state->shader.tokens == NULL)
- goto fail;
+ shader = CALLOC_STRUCT(lp_fragment_shader);
+ if (!shader)
+ return NULL;
- state->draw_data = draw_create_vertex_shader(llvmpipe->draw, templ);
- if (state->draw_data == NULL)
- goto fail;
+ /* get/save the summary info for this shader */
+ tgsi_scan_shader(templ->tokens, &shader->info);
- return state;
+ /* we need to keep a local copy of the tokens */
+ shader->base.tokens = tgsi_dup_tokens(templ->tokens);
-fail:
- if (state) {
- FREE( (void *)state->shader.tokens );
- FREE( state->draw_data );
- FREE( state );
- }
- return NULL;
+ return shader;
}
void
-llvmpipe_bind_vs_state(struct pipe_context *pipe, void *vs)
+llvmpipe_bind_fs_state(struct pipe_context *pipe, void *fs)
{
struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
- llvmpipe->vs = (const struct lp_vertex_shader *)vs;
-
- draw_bind_vertex_shader(llvmpipe->draw,
- (llvmpipe->vs ? llvmpipe->vs->draw_data : NULL));
+ llvmpipe->fs = (struct lp_fragment_shader *) fs;
- llvmpipe->dirty |= LP_NEW_VS;
+ llvmpipe->dirty |= LP_NEW_FS;
}
void
-llvmpipe_delete_vs_state(struct pipe_context *pipe, void *vs)
+llvmpipe_delete_fs_state(struct pipe_context *pipe, void *fs)
{
struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
+ struct llvmpipe_screen *screen = llvmpipe_screen(pipe->screen);
+ struct lp_fragment_shader *shader = fs;
+ struct lp_fragment_shader_variant *variant;
+
+ assert(fs != llvmpipe->fs);
- struct lp_vertex_shader *state =
- (struct lp_vertex_shader *)vs;
+ variant = shader->variants;
+ while(variant) {
+ struct lp_fragment_shader_variant *next = variant->next;
- draw_delete_vertex_shader(llvmpipe->draw, state->draw_data);
- FREE( state );
+ if(variant->function) {
+ if(variant->jit_function)
+ LLVMFreeMachineCodeForFunction(screen->engine, variant->function);
+ LLVMDeleteFunction(variant->function);
+ }
+
+ FREE(variant);
+
+ variant = next;
+ }
+
+ FREE((void *) shader->base.tokens);
+ FREE(shader);
}
llvmpipe->dirty |= LP_NEW_CONSTANTS;
}
+
+
+/**
+ * We need to generate several variants of the fragment pipeline to match
+ * all the combinations of the contributing state atoms.
+ *
+ * TODO: there is actually no reason to tie this to context state -- the
+ * generated code could be cached globally in the screen.
+ */
+static void
+make_variant_key(struct llvmpipe_context *lp,
+ struct lp_fragment_shader *shader,
+ struct lp_fragment_shader_variant_key *key)
+{
+ unsigned i;
+
+ memset(key, 0, sizeof *key);
+
+ if(lp->framebuffer.zsbuf &&
+ lp->depth_stencil->depth.enabled) {
+ key->zsbuf_format = lp->framebuffer.zsbuf->format;
+ memcpy(&key->depth, &lp->depth_stencil->depth, sizeof key->depth);
+ }
+
+ key->alpha.enabled = lp->depth_stencil->alpha.enabled;
+ if(key->alpha.enabled)
+ key->alpha.func = lp->depth_stencil->alpha.func;
+ /* alpha.ref_value is passed in jit_context */
+
+ memcpy(&key->blend, lp->blend, sizeof key->blend);
+
+ for(i = 0; i < PIPE_MAX_SAMPLERS; ++i)
+ if(shader->info.file_mask[TGSI_FILE_SAMPLER] & (1 << i))
+ lp_sampler_static_state(&key->sampler[i], lp->texture[i], lp->sampler[i]);
+}
+
+
+void
+llvmpipe_update_fs(struct llvmpipe_context *lp)
+{
+ struct lp_fragment_shader *shader = lp->fs;
+ struct lp_fragment_shader_variant_key key;
+ struct lp_fragment_shader_variant *variant;
+
+ make_variant_key(lp, shader, &key);
+
+ variant = shader->variants;
+ while(variant) {
+ if(memcmp(&variant->key, &key, sizeof key) == 0)
+ break;
+
+ variant = variant->next;
+ }
+
+ if(!variant)
+ variant = generate_fragment(lp, shader, &key);
+
+ shader->current = variant;
+}
projects / mesa.git / blobdiff