draw_llvm.c revision 11913e97987ee116e12299d57d85c8676d892120 
1#include "draw_llvm.h"
2
3#include "draw_context.h"
4#include "draw_vs.h"
5
6#include "gallivm/lp_bld_arit.h"
7#include "gallivm/lp_bld_struct.h"
8#include "gallivm/lp_bld_type.h"
9#include "gallivm/lp_bld_flow.h"
10#include "gallivm/lp_bld_debug.h"
11#include "gallivm/lp_bld_tgsi.h"
12#include "gallivm/lp_bld_printf.h"
13
14#include "tgsi/tgsi_exec.h"
15
16#include "util/u_cpu_detect.h"
17#include "util/u_string.h"
18
19#include <llvm-c/Transforms/Scalar.h>
20
21#define DEBUG_STORE 0
22
23
24/* generates the draw jit function */
25static void
26draw_llvm_generate(struct draw_llvm *llvm, struct draw_llvm_variant *var);
27
28static void
29init_globals(struct draw_llvm *llvm)
30{
31   LLVMTypeRef texture_type;
32
33   /* struct draw_jit_texture */
34   {
35      LLVMTypeRef elem_types[4];
36
37      elem_types[DRAW_JIT_TEXTURE_WIDTH]  = LLVMInt32Type();
38      elem_types[DRAW_JIT_TEXTURE_HEIGHT] = LLVMInt32Type();
39      elem_types[DRAW_JIT_TEXTURE_STRIDE] = LLVMInt32Type();
40      elem_types[DRAW_JIT_TEXTURE_DATA]   = LLVMPointerType(LLVMInt8Type(), 0);
41
42      texture_type = LLVMStructType(elem_types, Elements(elem_types), 0);
43
44      LP_CHECK_MEMBER_OFFSET(struct draw_jit_texture, width,
45                             llvm->target, texture_type,
46                             DRAW_JIT_TEXTURE_WIDTH);
47      LP_CHECK_MEMBER_OFFSET(struct draw_jit_texture, height,
48                             llvm->target, texture_type,
49                             DRAW_JIT_TEXTURE_HEIGHT);
50      LP_CHECK_MEMBER_OFFSET(struct draw_jit_texture, stride,
51                             llvm->target, texture_type,
52                             DRAW_JIT_TEXTURE_STRIDE);
53      LP_CHECK_MEMBER_OFFSET(struct draw_jit_texture, data,
54                             llvm->target, texture_type,
55                             DRAW_JIT_TEXTURE_DATA);
56      LP_CHECK_STRUCT_SIZE(struct draw_jit_texture,
57                           llvm->target, texture_type);
58
59      LLVMAddTypeName(llvm->module, "texture", texture_type);
60   }
61
62
63   /* struct draw_jit_context */
64   {
65      LLVMTypeRef elem_types[3];
66      LLVMTypeRef context_type;
67
68      elem_types[0] = LLVMPointerType(LLVMFloatType(), 0); /* vs_constants */
69      elem_types[1] = LLVMPointerType(LLVMFloatType(), 0); /* vs_constants */
70      elem_types[2] = LLVMArrayType(texture_type, PIPE_MAX_SAMPLERS); /* textures */
71
72      context_type = LLVMStructType(elem_types, Elements(elem_types), 0);
73
74      LP_CHECK_MEMBER_OFFSET(struct draw_jit_context, vs_constants,
75                             llvm->target, context_type, 0);
76      LP_CHECK_MEMBER_OFFSET(struct draw_jit_context, gs_constants,
77                             llvm->target, context_type, 1);
78      LP_CHECK_MEMBER_OFFSET(struct draw_jit_context, textures,
79                             llvm->target, context_type,
80                             DRAW_JIT_CONTEXT_TEXTURES_INDEX);
81      LP_CHECK_STRUCT_SIZE(struct draw_jit_context,
82                           llvm->target, context_type);
83
84      LLVMAddTypeName(llvm->module, "draw_jit_context", context_type);
85
86      llvm->context_ptr_type = LLVMPointerType(context_type, 0);
87   }
88   {
89      LLVMTypeRef buffer_ptr = LLVMPointerType(LLVMIntType(8), 0);
90      llvm->buffer_ptr_type = LLVMPointerType(buffer_ptr, 0);
91   }
92   /* struct pipe_vertex_buffer */
93   {
94      LLVMTypeRef elem_types[4];
95      LLVMTypeRef vb_type;
96
97      elem_types[0] = LLVMInt32Type();
98      elem_types[1] = LLVMInt32Type();
99      elem_types[2] = LLVMInt32Type();
100      elem_types[3] = LLVMPointerType(LLVMOpaqueType(), 0); /* vs_constants */
101
102      vb_type = LLVMStructType(elem_types, Elements(elem_types), 0);
103
104      LP_CHECK_MEMBER_OFFSET(struct pipe_vertex_buffer, stride,
105                             llvm->target, vb_type, 0);
106      LP_CHECK_MEMBER_OFFSET(struct pipe_vertex_buffer, buffer_offset,
107                             llvm->target, vb_type, 2);
108      LP_CHECK_STRUCT_SIZE(struct pipe_vertex_buffer,
109                           llvm->target, vb_type);
110
111      LLVMAddTypeName(llvm->module, "pipe_vertex_buffer", vb_type);
112
113      llvm->vb_ptr_type = LLVMPointerType(vb_type, 0);
114   }
115}
116
117static LLVMTypeRef
118create_vertex_header(struct draw_llvm *llvm, int data_elems)
119{
120   /* struct vertex_header */
121   LLVMTypeRef elem_types[3];
122   LLVMTypeRef vertex_header;
123   char struct_name[24];
124
125   util_snprintf(struct_name, 23, "vertex_header%d", data_elems);
126
127   elem_types[0]  = LLVMIntType(32);
128   elem_types[1]  = LLVMArrayType(LLVMFloatType(), 4);
129   elem_types[2]  = LLVMArrayType(elem_types[1], data_elems);
130
131   vertex_header = LLVMStructType(elem_types, Elements(elem_types), 0);
132
133   /* these are bit-fields and we can't take address of them
134      LP_CHECK_MEMBER_OFFSET(struct vertex_header, clipmask,
135      llvm->target, vertex_header,
136      DRAW_JIT_VERTEX_CLIPMASK);
137      LP_CHECK_MEMBER_OFFSET(struct vertex_header, edgeflag,
138      llvm->target, vertex_header,
139      DRAW_JIT_VERTEX_EDGEFLAG);
140      LP_CHECK_MEMBER_OFFSET(struct vertex_header, pad,
141      llvm->target, vertex_header,
142      DRAW_JIT_VERTEX_PAD);
143      LP_CHECK_MEMBER_OFFSET(struct vertex_header, vertex_id,
144      llvm->target, vertex_header,
145      DRAW_JIT_VERTEX_VERTEX_ID);
146   */
147   LP_CHECK_MEMBER_OFFSET(struct vertex_header, clip,
148                          llvm->target, vertex_header,
149                          DRAW_JIT_VERTEX_CLIP);
150   LP_CHECK_MEMBER_OFFSET(struct vertex_header, data,
151                          llvm->target, vertex_header,
152                          DRAW_JIT_VERTEX_DATA);
153
154   LLVMAddTypeName(llvm->module, struct_name, vertex_header);
155
156   return LLVMPointerType(vertex_header, 0);
157}
158
159struct draw_llvm *
160draw_llvm_create(struct draw_context *draw)
161{
162   struct draw_llvm *llvm = CALLOC_STRUCT( draw_llvm );
163
164   util_cpu_detect();
165
166   llvm->draw = draw;
167   llvm->engine = draw->engine;
168
169   debug_assert(llvm->engine);
170
171   llvm->module = LLVMModuleCreateWithName("draw_llvm");
172   llvm->provider = LLVMCreateModuleProviderForExistingModule(llvm->module);
173
174   LLVMAddModuleProvider(llvm->engine, llvm->provider);
175
176   llvm->target = LLVMGetExecutionEngineTargetData(llvm->engine);
177
178   llvm->pass = LLVMCreateFunctionPassManager(llvm->provider);
179   LLVMAddTargetData(llvm->target, llvm->pass);
180   /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
181    * but there are more on SVN. */
182   /* TODO: Add more passes */
183   LLVMAddConstantPropagationPass(llvm->pass);
184   if(util_cpu_caps.has_sse4_1) {
185      /* FIXME: There is a bug in this pass, whereby the combination of fptosi
186       * and sitofp (necessary for trunc/floor/ceil/round implementation)
187       * somehow becomes invalid code.
188       */
189      LLVMAddInstructionCombiningPass(llvm->pass);
190   }
191   LLVMAddPromoteMemoryToRegisterPass(llvm->pass);
192   LLVMAddGVNPass(llvm->pass);
193   LLVMAddCFGSimplificationPass(llvm->pass);
194
195   init_globals(llvm);
196
197
198#if 0
199   LLVMDumpModule(llvm->module);
200#endif
201
202   return llvm;
203}
204
205void
206draw_llvm_destroy(struct draw_llvm *llvm)
207{
208   free(llvm);
209}
210
211struct draw_llvm_variant *
212draw_llvm_prepare(struct draw_llvm *llvm, int num_inputs)
213{
214   struct draw_llvm_variant *variant = MALLOC(sizeof(struct draw_llvm_variant));
215
216   draw_llvm_make_variant_key(llvm, &variant->key);
217
218   llvm->vertex_header_ptr_type = create_vertex_header(llvm, num_inputs);
219
220   draw_llvm_generate(llvm, variant);
221
222   return variant;
223}
224
225static void
226generate_vs(struct draw_llvm *llvm,
227            LLVMBuilderRef builder,
228            LLVMValueRef (*outputs)[NUM_CHANNELS],
229            const LLVMValueRef (*inputs)[NUM_CHANNELS],
230            LLVMValueRef context_ptr)
231{
232   const struct tgsi_token *tokens = llvm->draw->vs.vertex_shader->state.tokens;
233   struct lp_type vs_type;
234   LLVMValueRef consts_ptr = draw_jit_context_vs_constants(builder, context_ptr);
235
236   memset(&vs_type, 0, sizeof vs_type);
237   vs_type.floating = TRUE; /* floating point values */
238   vs_type.sign = TRUE;     /* values are signed */
239   vs_type.norm = FALSE;    /* values are not limited to [0,1] or [-1,1] */
240   vs_type.width = 32;      /* 32-bit float */
241   vs_type.length = 4;      /* 4 elements per vector */
242#if 0
243   num_vs = 4;              /* number of vertices per block */
244#endif
245
246   /*tgsi_dump(tokens, 0);*/
247   lp_build_tgsi_soa(builder,
248                     tokens,
249                     vs_type,
250                     NULL /*struct lp_build_mask_context *mask*/,
251                     consts_ptr,
252                     NULL /*pos*/,
253                     inputs,
254                     outputs,
255                     NULL/*sampler*/);
256}
257
258#if DEBUG_STORE
259static void print_vectorf(LLVMBuilderRef builder,
260                         LLVMValueRef vec)
261{
262   LLVMValueRef val[4];
263   val[0] = LLVMBuildExtractElement(builder, vec,
264                                    LLVMConstInt(LLVMInt32Type(), 0, 0), "");
265   val[1] = LLVMBuildExtractElement(builder, vec,
266                                    LLVMConstInt(LLVMInt32Type(), 1, 0), "");
267   val[2] = LLVMBuildExtractElement(builder, vec,
268                                    LLVMConstInt(LLVMInt32Type(), 2, 0), "");
269   val[3] = LLVMBuildExtractElement(builder, vec,
270                                    LLVMConstInt(LLVMInt32Type(), 3, 0), "");
271   lp_build_printf(builder, "vector = [%f, %f, %f, %f]\n",
272                   val[0], val[1], val[2], val[3]);
273}
274#endif
275
276static void
277generate_fetch(LLVMBuilderRef builder,
278               LLVMValueRef vbuffers_ptr,
279               LLVMValueRef *res,
280               struct pipe_vertex_element *velem,
281               LLVMValueRef vbuf,
282               LLVMValueRef index)
283{
284   LLVMValueRef indices = LLVMConstInt(LLVMInt64Type(), velem->vertex_buffer_index, 0);
285   LLVMValueRef vbuffer_ptr = LLVMBuildGEP(builder, vbuffers_ptr,
286                                           &indices, 1, "");
287   LLVMValueRef vb_stride = draw_jit_vbuffer_stride(builder, vbuf);
288   LLVMValueRef vb_buffer_offset = draw_jit_vbuffer_offset(builder, vbuf);
289   LLVMValueRef stride = LLVMBuildMul(builder,
290                                      vb_stride,
291                                      index, "");
292
293   vbuffer_ptr = LLVMBuildLoad(builder, vbuffer_ptr, "vbuffer");
294
295   stride = LLVMBuildAdd(builder, stride,
296                         vb_buffer_offset,
297                         "");
298   stride = LLVMBuildAdd(builder, stride,
299                         LLVMConstInt(LLVMInt32Type(), velem->src_offset, 0),
300                         "");
301
302   /*lp_build_printf(builder, "vbuf index = %d, stride is %d\n", indices, stride);*/
303   vbuffer_ptr = LLVMBuildGEP(builder, vbuffer_ptr, &stride, 1, "");
304
305   *res = draw_llvm_translate_from(builder, vbuffer_ptr, velem->src_format);
306}
307
308static LLVMValueRef
309aos_to_soa(LLVMBuilderRef builder,
310           LLVMValueRef val0,
311           LLVMValueRef val1,
312           LLVMValueRef val2,
313           LLVMValueRef val3,
314           LLVMValueRef channel)
315{
316   LLVMValueRef ex, res;
317
318   ex = LLVMBuildExtractElement(builder, val0,
319                                channel, "");
320   res = LLVMBuildInsertElement(builder,
321                                LLVMConstNull(LLVMTypeOf(val0)),
322                                ex,
323                                LLVMConstInt(LLVMInt32Type(), 0, 0),
324                                "");
325
326   ex = LLVMBuildExtractElement(builder, val1,
327                                channel, "");
328   res = LLVMBuildInsertElement(builder,
329                                res, ex,
330                                LLVMConstInt(LLVMInt32Type(), 1, 0),
331                                "");
332
333   ex = LLVMBuildExtractElement(builder, val2,
334                                channel, "");
335   res = LLVMBuildInsertElement(builder,
336                                res, ex,
337                                LLVMConstInt(LLVMInt32Type(), 2, 0),
338                                "");
339
340   ex = LLVMBuildExtractElement(builder, val3,
341                                channel, "");
342   res = LLVMBuildInsertElement(builder,
343                                res, ex,
344                                LLVMConstInt(LLVMInt32Type(), 3, 0),
345                                "");
346
347   return res;
348}
349
350static void
351soa_to_aos(LLVMBuilderRef builder,
352           LLVMValueRef soa[NUM_CHANNELS],
353           LLVMValueRef aos[NUM_CHANNELS])
354{
355   LLVMValueRef comp;
356   int i = 0;
357
358   debug_assert(NUM_CHANNELS == 4);
359
360   aos[0] = LLVMConstNull(LLVMTypeOf(soa[0]));
361   aos[1] = aos[2] = aos[3] = aos[0];
362
363   for (i = 0; i < NUM_CHANNELS; ++i) {
364      LLVMValueRef channel = LLVMConstInt(LLVMInt32Type(), i, 0);
365
366      comp = LLVMBuildExtractElement(builder, soa[i],
367                                     LLVMConstInt(LLVMInt32Type(), 0, 0), "");
368      aos[0] = LLVMBuildInsertElement(builder, aos[0], comp, channel, "");
369
370      comp = LLVMBuildExtractElement(builder, soa[i],
371                                     LLVMConstInt(LLVMInt32Type(), 1, 0), "");
372      aos[1] = LLVMBuildInsertElement(builder, aos[1], comp, channel, "");
373
374      comp = LLVMBuildExtractElement(builder, soa[i],
375                                     LLVMConstInt(LLVMInt32Type(), 2, 0), "");
376      aos[2] = LLVMBuildInsertElement(builder, aos[2], comp, channel, "");
377
378      comp = LLVMBuildExtractElement(builder, soa[i],
379                                     LLVMConstInt(LLVMInt32Type(), 3, 0), "");
380      aos[3] = LLVMBuildInsertElement(builder, aos[3], comp, channel, "");
381
382   }
383}
384
385static void
386convert_to_soa(LLVMBuilderRef builder,
387               LLVMValueRef (*aos)[NUM_CHANNELS],
388               LLVMValueRef (*soa)[NUM_CHANNELS],
389               int num_attribs)
390{
391   int i;
392
393   debug_assert(NUM_CHANNELS == 4);
394
395   for (i = 0; i < num_attribs; ++i) {
396      LLVMValueRef val0 = aos[i][0];
397      LLVMValueRef val1 = aos[i][1];
398      LLVMValueRef val2 = aos[i][2];
399      LLVMValueRef val3 = aos[i][3];
400
401      soa[i][0] = aos_to_soa(builder, val0, val1, val2, val3,
402                             LLVMConstInt(LLVMInt32Type(), 0, 0));
403      soa[i][1] = aos_to_soa(builder, val0, val1, val2, val3,
404                             LLVMConstInt(LLVMInt32Type(), 1, 0));
405      soa[i][2] = aos_to_soa(builder, val0, val1, val2, val3,
406                             LLVMConstInt(LLVMInt32Type(), 2, 0));
407      soa[i][3] = aos_to_soa(builder, val0, val1, val2, val3,
408                             LLVMConstInt(LLVMInt32Type(), 3, 0));
409   }
410}
411
412static void
413store_aos(LLVMBuilderRef builder,
414          LLVMValueRef io_ptr,
415          LLVMValueRef index,
416          LLVMValueRef value)
417{
418   LLVMValueRef id_ptr = draw_jit_header_id(builder, io_ptr);
419   LLVMValueRef data_ptr = draw_jit_header_data(builder, io_ptr);
420   LLVMValueRef indices[3];
421
422   indices[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
423   indices[1] = index;
424   indices[2] = LLVMConstInt(LLVMInt32Type(), 0, 0);
425
426   /* undefined vertex */
427   LLVMBuildStore(builder, LLVMConstInt(LLVMInt32Type(),
428                                        0xffff, 0), id_ptr);
429
430#if DEBUG_STORE
431   lp_build_printf(builder, "    ---- %p storing attribute %d (io = %p)\n", data_ptr, index, io_ptr);
432#endif
433#if 0
434   /*lp_build_printf(builder, " ---- %p storing at %d (%p)  ", io_ptr, index, data_ptr);
435     print_vectorf(builder, value);*/
436   data_ptr = LLVMBuildBitCast(builder, data_ptr,
437                               LLVMPointerType(LLVMArrayType(LLVMVectorType(LLVMFloatType(), 4), 0), 0),
438                               "datavec");
439   data_ptr = LLVMBuildGEP(builder, data_ptr, indices, 2, "");
440
441   LLVMBuildStore(builder, value, data_ptr);
442#else
443   {
444      LLVMValueRef x, y, z, w;
445      LLVMValueRef idx0, idx1, idx2, idx3;
446      LLVMValueRef gep0, gep1, gep2, gep3;
447      data_ptr = LLVMBuildGEP(builder, data_ptr, indices, 3, "");
448
449      idx0 = LLVMConstInt(LLVMInt32Type(), 0, 0);
450      idx1 = LLVMConstInt(LLVMInt32Type(), 1, 0);
451      idx2 = LLVMConstInt(LLVMInt32Type(), 2, 0);
452      idx3 = LLVMConstInt(LLVMInt32Type(), 3, 0);
453
454      x = LLVMBuildExtractElement(builder, value,
455                                  idx0, "");
456      y = LLVMBuildExtractElement(builder, value,
457                                  idx1, "");
458      z = LLVMBuildExtractElement(builder, value,
459                                  idx2, "");
460      w = LLVMBuildExtractElement(builder, value,
461                                  idx3, "");
462
463      gep0 = LLVMBuildGEP(builder, data_ptr, &idx0, 1, "");
464      gep1 = LLVMBuildGEP(builder, data_ptr, &idx1, 1, "");
465      gep2 = LLVMBuildGEP(builder, data_ptr, &idx2, 1, "");
466      gep3 = LLVMBuildGEP(builder, data_ptr, &idx3, 1, "");
467
468      /*lp_build_printf(builder, "##### x = %f (%p), y = %f (%p), z = %f (%p), w = %f (%p)\n",
469        x, gep0, y, gep1, z, gep2, w, gep3);*/
470      LLVMBuildStore(builder, x, gep0);
471      LLVMBuildStore(builder, y, gep1);
472      LLVMBuildStore(builder, z, gep2);
473      LLVMBuildStore(builder, w, gep3);
474   }
475#endif
476}
477
478static void
479store_aos_array(LLVMBuilderRef builder,
480                LLVMValueRef io_ptr,
481                LLVMValueRef aos[NUM_CHANNELS],
482                int attrib,
483                int num_outputs)
484{
485   LLVMValueRef attr_index = LLVMConstInt(LLVMInt32Type(), attrib, 0);
486   LLVMValueRef ind0 = LLVMConstInt(LLVMInt32Type(), 0, 0);
487   LLVMValueRef ind1 = LLVMConstInt(LLVMInt32Type(), 1, 0);
488   LLVMValueRef ind2 = LLVMConstInt(LLVMInt32Type(), 2, 0);
489   LLVMValueRef ind3 = LLVMConstInt(LLVMInt32Type(), 3, 0);
490   LLVMValueRef io0_ptr, io1_ptr, io2_ptr, io3_ptr;
491
492   debug_assert(NUM_CHANNELS == 4);
493
494   io0_ptr = LLVMBuildGEP(builder, io_ptr,
495                          &ind0, 1, "");
496   io1_ptr = LLVMBuildGEP(builder, io_ptr,
497                          &ind1, 1, "");
498   io2_ptr = LLVMBuildGEP(builder, io_ptr,
499                          &ind2, 1, "");
500   io3_ptr = LLVMBuildGEP(builder, io_ptr,
501                          &ind3, 1, "");
502
503#if DEBUG_STORE
504   lp_build_printf(builder, "   io = %p, indexes[%d, %d, %d, %d]\n",
505                   io_ptr, ind0, ind1, ind2, ind3);
506#endif
507
508   store_aos(builder, io0_ptr, attr_index, aos[0]);
509   store_aos(builder, io1_ptr, attr_index, aos[1]);
510   store_aos(builder, io2_ptr, attr_index, aos[2]);
511   store_aos(builder, io3_ptr, attr_index, aos[3]);
512}
513
514static void
515convert_to_aos(LLVMBuilderRef builder,
516               LLVMValueRef io,
517               LLVMValueRef (*outputs)[NUM_CHANNELS],
518               int num_outputs,
519               int max_vertices)
520{
521   unsigned chan, attrib;
522
523#if DEBUG_STORE
524   lp_build_printf(builder, "   # storing begin\n");
525#endif
526   for (attrib = 0; attrib < num_outputs; ++attrib) {
527      LLVMValueRef soa[4];
528      LLVMValueRef aos[4];
529      for(chan = 0; chan < NUM_CHANNELS; ++chan) {
530         if(outputs[attrib][chan]) {
531            LLVMValueRef out = LLVMBuildLoad(builder, outputs[attrib][chan], "");
532            lp_build_name(out, "output%u.%c", attrib, "xyzw"[chan]);
533            /*lp_build_printf(builder, "output %d : %d ",
534                            LLVMConstInt(LLVMInt32Type(), attrib, 0),
535                            LLVMConstInt(LLVMInt32Type(), chan, 0));
536              print_vectorf(builder, out);*/
537            soa[chan] = out;
538         } else
539            soa[chan] = 0;
540      }
541      soa_to_aos(builder, soa, aos);
542      store_aos_array(builder,
543                      io,
544                      aos,
545                      attrib,
546                      num_outputs);
547   }
548#if DEBUG_STORE
549   lp_build_printf(builder, "   # storing end\n");
550#endif
551}
552
553static void
554draw_llvm_generate(struct draw_llvm *llvm, struct draw_llvm_variant *variant)
555{
556   LLVMTypeRef arg_types[7];
557   LLVMTypeRef func_type;
558   LLVMValueRef context_ptr;
559   LLVMBasicBlockRef block;
560   LLVMBuilderRef builder;
561   LLVMValueRef start, end, count, stride, step, io_itr;
562   LLVMValueRef io_ptr, vbuffers_ptr, vb_ptr;
563   struct draw_context *draw = llvm->draw;
564   unsigned i, j;
565   struct lp_build_context bld;
566   struct lp_build_loop_state lp_loop;
567   struct lp_type vs_type = lp_type_float_vec(32);
568   const int max_vertices = 4;
569   LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][NUM_CHANNELS];
570
571   arg_types[0] = llvm->context_ptr_type;           /* context */
572   arg_types[1] = llvm->vertex_header_ptr_type;     /* vertex_header */
573   arg_types[2] = llvm->buffer_ptr_type;            /* vbuffers */
574   arg_types[3] = LLVMInt32Type();                  /* start */
575   arg_types[4] = LLVMInt32Type();                  /* count */
576   arg_types[5] = LLVMInt32Type();                  /* stride */
577   arg_types[6] = llvm->vb_ptr_type;                /* pipe_vertex_buffer's */
578
579   func_type = LLVMFunctionType(LLVMVoidType(), arg_types, Elements(arg_types), 0);
580
581   variant->function = LLVMAddFunction(llvm->module, "draw_llvm_shader", func_type);
582   LLVMSetFunctionCallConv(variant->function, LLVMCCallConv);
583   for(i = 0; i < Elements(arg_types); ++i)
584      if(LLVMGetTypeKind(arg_types[i]) == LLVMPointerTypeKind)
585         LLVMAddAttribute(LLVMGetParam(variant->function, i), LLVMNoAliasAttribute);
586
587   context_ptr  = LLVMGetParam(variant->function, 0);
588   io_ptr       = LLVMGetParam(variant->function, 1);
589   vbuffers_ptr = LLVMGetParam(variant->function, 2);
590   start        = LLVMGetParam(variant->function, 3);
591   count        = LLVMGetParam(variant->function, 4);
592   stride       = LLVMGetParam(variant->function, 5);
593   vb_ptr       = LLVMGetParam(variant->function, 6);
594
595   lp_build_name(context_ptr, "context");
596   lp_build_name(io_ptr, "io");
597   lp_build_name(vbuffers_ptr, "vbuffers");
598   lp_build_name(start, "start");
599   lp_build_name(count, "count");
600   lp_build_name(stride, "stride");
601   lp_build_name(vb_ptr, "vb");
602
603   /*
604    * Function body
605    */
606
607   block = LLVMAppendBasicBlock(variant->function, "entry");
608   builder = LLVMCreateBuilder();
609   LLVMPositionBuilderAtEnd(builder, block);
610
611   lp_build_context_init(&bld, builder, vs_type);
612
613   end = lp_build_add(&bld, start, count);
614
615   step = LLVMConstInt(LLVMInt32Type(), max_vertices, 0);
616
617#if DEBUG_STORE
618   lp_build_printf(builder, "start = %d, end = %d, step = %d\n",
619                   start, end, step);
620#endif
621   lp_build_loop_begin(builder, start, &lp_loop);
622   {
623      LLVMValueRef inputs[PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS];
624      LLVMValueRef aos_attribs[PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS] = { { 0 } };
625      LLVMValueRef io;
626      const LLVMValueRef (*ptr_aos)[NUM_CHANNELS];
627
628      io_itr = LLVMBuildSub(builder, lp_loop.counter, start, "");
629      io = LLVMBuildGEP(builder, io_ptr, &io_itr, 1, "");
630#if DEBUG_STORE
631      lp_build_printf(builder, " --- io %d = %p, loop counter %d\n",
632                      io_itr, io, lp_loop.counter);
633#endif
634      for (i = 0; i < NUM_CHANNELS; ++i) {
635         LLVMValueRef true_index = LLVMBuildAdd(
636            builder,
637            lp_loop.counter,
638            LLVMConstInt(LLVMInt32Type(), i, 0), "");
639         for (j = 0; j < draw->pt.nr_vertex_elements; ++j) {
640            struct pipe_vertex_element *velem = &draw->pt.vertex_element[j];
641            LLVMValueRef vb_index = LLVMConstInt(LLVMInt32Type(),
642                                                 velem->vertex_buffer_index,
643                                                 0);
644            LLVMValueRef vb = LLVMBuildGEP(builder, vb_ptr,
645                                           &vb_index, 1, "");
646            generate_fetch(builder, vbuffers_ptr,
647                           &aos_attribs[j][i], velem, vb, true_index);
648         }
649      }
650      convert_to_soa(builder, aos_attribs, inputs,
651                     draw->pt.nr_vertex_elements);
652
653      ptr_aos = (const LLVMValueRef (*)[NUM_CHANNELS]) inputs;
654      generate_vs(llvm,
655                  builder,
656                  outputs,
657                  ptr_aos,
658                  context_ptr);
659
660      convert_to_aos(builder, io, outputs,
661                     draw->vs.vertex_shader->info.num_outputs,
662                     max_vertices);
663   }
664   lp_build_loop_end_cond(builder, end, step, LLVMIntUGE, &lp_loop);
665
666   LLVMBuildRetVoid(builder);
667
668   LLVMDisposeBuilder(builder);
669
670   /*
671    * Translate the LLVM IR into machine code.
672    */
673#ifdef DEBUG
674   if(LLVMVerifyFunction(variant->function, LLVMPrintMessageAction)) {
675      LLVMDumpValue(variant->function);
676      assert(0);
677   }
678#endif
679
680   LLVMRunFunctionPassManager(llvm->pass, variant->function);
681
682   if (0) {
683      LLVMDumpValue(variant->function);
684      debug_printf("\n");
685   }
686   variant->jit_func = (draw_jit_vert_func)LLVMGetPointerToGlobal(llvm->draw->engine, variant->function);
687
688   if (0)
689      lp_disassemble(variant->jit_func);
690}
691
692void
693draw_llvm_make_variant_key(struct draw_llvm *llvm,
694                           struct draw_llvm_variant_key *key)
695{
696   memset(key, 0, sizeof(struct draw_llvm_variant_key));
697
698   key->nr_vertex_elements = llvm->draw->pt.nr_vertex_elements;
699
700   memcpy(key->vertex_element,
701          llvm->draw->pt.vertex_element,
702          sizeof(struct pipe_vertex_element) * key->nr_vertex_elements);
703
704   memcpy(&key->vs,
705          &llvm->draw->vs.vertex_shader->state,
706          sizeof(struct pipe_shader_state));
707}
708