tgsi_sanity.c revision ff56a12051a91c5c69db9afb85e4a3ebdb17ef96 
1/**************************************************************************
2 *
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include "util/u_debug.h"
29#include "util/u_memory.h"
30#include "util/u_prim.h"
31#include "cso_cache/cso_hash.h"
32#include "tgsi_sanity.h"
33#include "tgsi_info.h"
34#include "tgsi_iterate.h"
35
36typedef struct {
37   uint file : 28;
38   /* max 2 dimensions */
39   uint dimensions : 4;
40   uint indices[2];
41} scan_register;
42
43struct sanity_check_ctx
44{
45   struct tgsi_iterate_context iter;
46   struct cso_hash *regs_decl;
47   struct cso_hash *regs_used;
48   struct cso_hash *regs_ind_used;
49
50   uint num_imms;
51   uint num_instructions;
52   uint index_of_END;
53
54   uint errors;
55   uint warnings;
56   uint implied_array_size;
57};
58
59static INLINE unsigned
60scan_register_key(const scan_register *reg)
61{
62   unsigned key = reg->file;
63   key |= (reg->indices[0] << 4);
64   key |= (reg->indices[1] << 18);
65
66   return key;
67}
68
69static void
70fill_scan_register1d(scan_register *reg,
71                     uint file, uint index)
72{
73   reg->file = file;
74   reg->dimensions = 1;
75   reg->indices[0] = index;
76   reg->indices[1] = 0;
77}
78
79static void
80fill_scan_register2d(scan_register *reg,
81                     uint file, uint index1, uint index2)
82{
83   reg->file = file;
84   reg->dimensions = 2;
85   reg->indices[0] = index1;
86   reg->indices[1] = index2;
87}
88
89static void
90scan_register_dst(scan_register *reg,
91                  struct tgsi_full_dst_register *dst)
92{
93   fill_scan_register1d(reg,
94                        dst->Register.File,
95                        dst->Register.Index);
96}
97
98static void
99scan_register_src(scan_register *reg,
100                  struct tgsi_full_src_register *src)
101{
102   if (src->Register.Dimension) {
103      /*FIXME: right now we don't support indirect
104       * multidimensional addressing */
105      debug_assert(!src->Dimension.Indirect);
106      fill_scan_register2d(reg,
107                           src->Register.File,
108                           src->Register.Index,
109                           src->Dimension.Index);
110   } else {
111      fill_scan_register1d(reg,
112                           src->Register.File,
113                           src->Register.Index);
114   }
115}
116
117static scan_register *
118create_scan_register_src(struct tgsi_full_src_register *src)
119{
120   scan_register *reg = MALLOC(sizeof(scan_register));
121   scan_register_src(reg, src);
122
123   return reg;
124}
125
126static scan_register *
127create_scan_register_dst(struct tgsi_full_dst_register *dst)
128{
129   scan_register *reg = MALLOC(sizeof(scan_register));
130   scan_register_dst(reg, dst);
131
132   return reg;
133}
134
135static void
136report_error(
137   struct sanity_check_ctx *ctx,
138   const char *format,
139   ... )
140{
141   va_list args;
142
143   debug_printf( "Error  : " );
144   va_start( args, format );
145   _debug_vprintf( format, args );
146   va_end( args );
147   debug_printf( "\n" );
148   ctx->errors++;
149}
150
151static void
152report_warning(
153   struct sanity_check_ctx *ctx,
154   const char *format,
155   ... )
156{
157   va_list args;
158
159   debug_printf( "Warning: " );
160   va_start( args, format );
161   _debug_vprintf( format, args );
162   va_end( args );
163   debug_printf( "\n" );
164   ctx->warnings++;
165}
166
167static boolean
168check_file_name(
169   struct sanity_check_ctx *ctx,
170   uint file )
171{
172   if (file <= TGSI_FILE_NULL || file >= TGSI_FILE_COUNT) {
173      report_error( ctx, "(%u): Invalid register file name", file );
174      return FALSE;
175   }
176   return TRUE;
177}
178
179static boolean
180is_register_declared(
181   struct sanity_check_ctx *ctx,
182   const scan_register *reg)
183{
184   void *data = cso_hash_find_data_from_template(
185      ctx->regs_decl, scan_register_key(reg),
186      (void*)reg, sizeof(scan_register));
187   return  data ? TRUE : FALSE;
188}
189
190static boolean
191is_any_register_declared(
192   struct sanity_check_ctx *ctx,
193   uint file )
194{
195   struct cso_hash_iter iter =
196      cso_hash_first_node(ctx->regs_decl);
197
198   while (cso_hash_iter_is_null(iter)) {
199      scan_register *reg = (scan_register *)cso_hash_iter_data(iter);
200      if (reg->file == file)
201         return TRUE;
202      iter = cso_hash_iter_next(iter);
203   }
204
205   return FALSE;
206}
207
208static boolean
209is_register_used(
210   struct sanity_check_ctx *ctx,
211   scan_register *reg)
212{
213   void *data = cso_hash_find_data_from_template(
214      ctx->regs_used, scan_register_key(reg),
215      reg, sizeof(scan_register));
216   return  data ? TRUE : FALSE;
217}
218
219
220static boolean
221is_ind_register_used(
222   struct sanity_check_ctx *ctx,
223   scan_register *reg)
224{
225   return cso_hash_contains(ctx->regs_ind_used, reg->file);
226}
227
228static const char *file_names[TGSI_FILE_COUNT] =
229{
230   "NULL",
231   "CONST",
232   "IN",
233   "OUT",
234   "TEMP",
235   "SAMP",
236   "ADDR",
237   "IMM",
238   "LOOP",
239   "PRED"
240};
241
242static boolean
243check_register_usage(
244   struct sanity_check_ctx *ctx,
245   scan_register *reg,
246   const char *name,
247   boolean indirect_access )
248{
249   if (!check_file_name( ctx, reg->file )) {
250      free(reg);
251      return FALSE;
252   }
253
254   if (indirect_access) {
255      /* Note that 'index' is an offset relative to the value of the
256       * address register.  No range checking done here.*/
257      reg->indices[0] = 0;
258      reg->indices[1] = 0;
259      if (!is_any_register_declared( ctx, reg->file ))
260         report_error( ctx, "%s: Undeclared %s register", file_names[reg->file], name );
261      if (!is_ind_register_used(ctx, reg))
262         cso_hash_insert(ctx->regs_ind_used, reg->file, reg);
263      else
264         free(reg);
265   }
266   else {
267      if (!is_register_declared( ctx, reg )) {
268         if (reg->dimensions == 2)
269            report_error( ctx, "%s[%d][%d]: Undeclared %s register", file_names[reg->file],
270                          reg->indices[0], reg->indices[1], name );
271         else
272            report_error( ctx, "%s[%d]: Undeclared %s register", file_names[reg->file],
273                          reg->indices[0], name );
274         }
275      if (!is_register_used( ctx, reg ))
276         cso_hash_insert(ctx->regs_used, scan_register_key(reg), reg);
277      else
278         free(reg);
279   }
280   return TRUE;
281}
282
283static boolean
284iter_instruction(
285   struct tgsi_iterate_context *iter,
286   struct tgsi_full_instruction *inst )
287{
288   struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) iter;
289   const struct tgsi_opcode_info *info;
290   uint i;
291
292   if (inst->Instruction.Opcode == TGSI_OPCODE_END) {
293      if (ctx->index_of_END != ~0) {
294         report_error( ctx, "Too many END instructions" );
295      }
296      ctx->index_of_END = ctx->num_instructions;
297   }
298
299   info = tgsi_get_opcode_info( inst->Instruction.Opcode );
300   if (info == NULL) {
301      report_error( ctx, "(%u): Invalid instruction opcode", inst->Instruction.Opcode );
302      return TRUE;
303   }
304
305   if (info->num_dst != inst->Instruction.NumDstRegs) {
306      report_error( ctx, "%s: Invalid number of destination operands, should be %u", info->mnemonic, info->num_dst );
307   }
308   if (info->num_src != inst->Instruction.NumSrcRegs) {
309      report_error( ctx, "%s: Invalid number of source operands, should be %u", info->mnemonic, info->num_src );
310   }
311
312   /* Check destination and source registers' validity.
313    * Mark the registers as used.
314    */
315   for (i = 0; i < inst->Instruction.NumDstRegs; i++) {
316      scan_register *reg = create_scan_register_dst(&inst->Dst[i]);
317      check_register_usage(
318         ctx,
319         reg,
320         "destination",
321         FALSE );
322   }
323   for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
324      scan_register *reg = create_scan_register_src(&inst->Src[i]);
325      check_register_usage(
326         ctx,
327         reg,
328         "source",
329         (boolean)inst->Src[i].Register.Indirect );
330      if (inst->Src[i].Register.Indirect) {
331         scan_register *ind_reg = MALLOC(sizeof(scan_register));
332
333         fill_scan_register1d(ind_reg,
334                              inst->Src[i].Indirect.File,
335                              inst->Src[i].Indirect.Index);
336         check_register_usage(
337            ctx,
338            reg,
339            "indirect",
340            FALSE );
341         if (!(reg->file == TGSI_FILE_ADDRESS || reg->file == TGSI_FILE_LOOP) ||
342             reg->indices[0] != 0) {
343            report_warning(ctx, "Indirect register neither ADDR[0] nor LOOP[0]");
344         }
345      }
346   }
347
348   switch (inst->Instruction.Opcode) {
349   case TGSI_OPCODE_BGNFOR:
350   case TGSI_OPCODE_ENDFOR:
351      if (inst->Dst[0].Register.File != TGSI_FILE_LOOP ||
352          inst->Dst[0].Register.Index != 0) {
353         report_error(ctx, "Destination register must be LOOP[0]");
354      }
355      break;
356   }
357
358   switch (inst->Instruction.Opcode) {
359   case TGSI_OPCODE_BGNFOR:
360      if (inst->Src[0].Register.File != TGSI_FILE_CONSTANT &&
361          inst->Src[0].Register.File != TGSI_FILE_IMMEDIATE) {
362         report_error(ctx, "Source register file must be either CONST or IMM");
363      }
364      break;
365   }
366
367   ctx->num_instructions++;
368
369   return TRUE;
370}
371
372static void
373check_and_declare(struct sanity_check_ctx *ctx,
374                  scan_register *reg)
375{
376   if (is_register_declared( ctx, reg))
377      report_error( ctx, "%s[%u]: The same register declared more than once",
378                    file_names[reg->file], reg->indices[0] );
379   cso_hash_insert(ctx->regs_decl,
380                   scan_register_key(reg),
381                   reg);
382}
383
384
385static boolean
386iter_declaration(
387   struct tgsi_iterate_context *iter,
388   struct tgsi_full_declaration *decl )
389{
390   struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) iter;
391   uint file;
392   uint i;
393
394   /* No declarations allowed after the first instruction.
395    */
396   if (ctx->num_instructions > 0)
397      report_error( ctx, "Instruction expected but declaration found" );
398
399   /* Check registers' validity.
400    * Mark the registers as declared.
401    */
402   file = decl->Declaration.File;
403   if (!check_file_name( ctx, file ))
404      return TRUE;
405   for (i = decl->Range.First; i <= decl->Range.Last; i++) {
406      /* declared TGSI_FILE_INPUT's for geometry processor
407       * have an implied second dimension */
408      if (file == TGSI_FILE_INPUT &&
409          ctx->iter.processor.Processor == TGSI_PROCESSOR_GEOMETRY) {
410         uint vert;
411         for (vert = 0; vert < ctx->implied_array_size; ++vert) {
412            scan_register *reg = MALLOC(sizeof(scan_register));
413            fill_scan_register2d(reg, file, vert, i);
414            check_and_declare(ctx, reg);
415         }
416      } else {
417         scan_register *reg = MALLOC(sizeof(scan_register));
418         fill_scan_register1d(reg, file, i);
419         check_and_declare(ctx, reg);
420      }
421   }
422
423   return TRUE;
424}
425
426static boolean
427iter_immediate(
428   struct tgsi_iterate_context *iter,
429   struct tgsi_full_immediate *imm )
430{
431   struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) iter;
432   scan_register *reg;
433
434   /* No immediates allowed after the first instruction.
435    */
436   if (ctx->num_instructions > 0)
437      report_error( ctx, "Instruction expected but immediate found" );
438
439   /* Mark the register as declared.
440    */
441   reg = MALLOC(sizeof(scan_register));
442   fill_scan_register1d(reg, TGSI_FILE_IMMEDIATE, ctx->num_imms);
443   cso_hash_insert(ctx->regs_decl, scan_register_key(reg), reg);
444   ctx->num_imms++;
445
446   /* Check data type validity.
447    */
448   if (imm->Immediate.DataType != TGSI_IMM_FLOAT32 &&
449       imm->Immediate.DataType != TGSI_IMM_UINT32 &&
450       imm->Immediate.DataType != TGSI_IMM_INT32) {
451      report_error( ctx, "(%u): Invalid immediate data type", imm->Immediate.DataType );
452      return TRUE;
453   }
454
455   return TRUE;
456}
457
458
459static boolean
460iter_property(
461   struct tgsi_iterate_context *iter,
462   struct tgsi_full_property *prop )
463{
464   struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) iter;
465
466   if (iter->processor.Processor == TGSI_PROCESSOR_GEOMETRY &&
467       prop->Property.PropertyName == TGSI_PROPERTY_GS_INPUT_PRIM) {
468      ctx->implied_array_size = u_vertices_per_prim(prop->u[0].Data);
469   }
470   return TRUE;
471}
472
473static boolean
474epilog(
475   struct tgsi_iterate_context *iter )
476{
477   struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) iter;
478
479   /* There must be an END instruction somewhere.
480    */
481   if (ctx->index_of_END == ~0) {
482      report_error( ctx, "Missing END instruction" );
483   }
484
485   /* Check if all declared registers were used.
486    */
487   {
488      struct cso_hash_iter iter =
489         cso_hash_first_node(ctx->regs_decl);
490
491      while (cso_hash_iter_is_null(iter)) {
492         scan_register *reg = (scan_register *)cso_hash_iter_data(iter);
493         if (!is_register_used(ctx, reg) && !is_ind_register_used(ctx, reg)) {
494            report_warning( ctx, "%s[%u]: Register never used",
495                            file_names[reg->file], reg->indices[0] );
496         }
497         iter = cso_hash_iter_next(iter);
498      }
499   }
500
501   /* Print totals, if any.
502    */
503   if (ctx->errors || ctx->warnings)
504      debug_printf( "%u errors, %u warnings\n", ctx->errors, ctx->warnings );
505
506   return TRUE;
507}
508
509static void
510regs_hash_destroy(struct cso_hash *hash)
511{
512   struct cso_hash_iter iter = cso_hash_first_node(hash);
513   while (!cso_hash_iter_is_null(iter)) {
514      scan_register *reg = (scan_register *)cso_hash_iter_data(iter);
515      iter = cso_hash_erase(hash, iter);
516      free(reg);
517   }
518   cso_hash_delete(hash);
519}
520
521boolean
522tgsi_sanity_check(
523   const struct tgsi_token *tokens )
524{
525   struct sanity_check_ctx ctx;
526
527   ctx.iter.prolog = NULL;
528   ctx.iter.iterate_instruction = iter_instruction;
529   ctx.iter.iterate_declaration = iter_declaration;
530   ctx.iter.iterate_immediate = iter_immediate;
531   ctx.iter.iterate_property = iter_property;
532   ctx.iter.epilog = epilog;
533
534   ctx.regs_decl = cso_hash_create();
535   ctx.regs_used = cso_hash_create();
536   ctx.regs_ind_used = cso_hash_create();
537
538   ctx.num_imms = 0;
539   ctx.num_instructions = 0;
540   ctx.index_of_END = ~0;
541
542   ctx.errors = 0;
543   ctx.warnings = 0;
544   ctx.implied_array_size = 0;
545
546   if (!tgsi_iterate_shader( tokens, &ctx.iter ))
547      return FALSE;
548
549   regs_hash_destroy(ctx.regs_decl);
550   regs_hash_destroy(ctx.regs_used);
551   regs_hash_destroy(ctx.regs_ind_used);
552   return ctx.errors == 0;
553}
554