tgsi: New file.

2 files changed, 307 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/tgsi/util/tgsi_sanity.c b/src/gallium/auxiliary/tgsi/util/tgsi_sanity.c
new file mode 100644
index 0000000000..377309c3fd
--- /dev/null
+++ b/src/gallium/auxiliary/tgsi/util/tgsi_sanity.c
@@ -0,0 +1,258 @@
+/**************************************************************************
+ * 
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#include "pipe/p_debug.h"
+#include "tgsi_sanity.h"
+#include "tgsi_transform.h"
+
+#define MAX_REGISTERS 256
+
+typedef uint reg_flag;
+
+#define BITS_IN_REG_FLAG (sizeof( reg_flag ) * 8)
+
+struct sanity_check_ctx
+{
+   struct tgsi_transform_context xform;
+
+   reg_flag regs_decl[TGSI_FILE_COUNT][MAX_REGISTERS / sizeof( uint ) / 8];
+   reg_flag regs_used[TGSI_FILE_COUNT][MAX_REGISTERS / sizeof( uint ) / 8];
+   uint num_imms;
+   uint num_instructions;
+   uint index_of_END;
+
+   uint errors;
+   uint warnings;
+};
+
+static void
+report_error(
+   struct sanity_check_ctx *ctx,
+   const char *msg )
+{
+   debug_printf( "\nError: %s", msg );
+   ctx->errors++;
+}
+
+static void
+report_warning(
+   struct sanity_check_ctx *ctx,
+   const char *msg )
+{
+   debug_printf( "\nWarning: %s", msg );
+   ctx->warnings++;
+}
+
+static boolean
+check_file_name(
+   struct sanity_check_ctx *ctx,
+   uint file )
+{
+   if (file <= TGSI_FILE_NULL || file >= TGSI_FILE_COUNT) {
+      report_error( ctx, "Invalid file name" );
+      return FALSE;
+   }
+   return TRUE;
+}
+
+static boolean
+is_register_declared(
+   struct sanity_check_ctx *ctx,
+   uint file,
+   uint index )
+{
+   assert( index < MAX_REGISTERS );
+
+   return (ctx->regs_decl[file][index / BITS_IN_REG_FLAG] & (1 << (index % BITS_IN_REG_FLAG))) ? TRUE : FALSE;
+}
+
+static boolean
+is_register_used(
+   struct sanity_check_ctx *ctx,
+   uint file,
+   uint index )
+{
+   assert( index < MAX_REGISTERS );
+
+   return (ctx->regs_used[file][index / BITS_IN_REG_FLAG] & (1 << (index % BITS_IN_REG_FLAG))) ? TRUE : FALSE;
+}
+
+static void xform_instruction(
+   struct tgsi_transform_context *xform,
+   struct tgsi_full_instruction *inst )
+{
+   struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) xform;
+   uint i;
+
+   /* There must be no other instructions after END.
+    */
+   if (ctx->index_of_END != ~0) {
+      report_error( ctx, "Unexpected instruction after END" );
+   }
+   else if (inst->Instruction.Opcode == TGSI_OPCODE_END) {
+      ctx->index_of_END = ctx->num_instructions;
+   }
+
+   /* Check destination and source registers' validity.
+    * Mark the registers as used.
+    */
+   for (i = 0; i < inst->Instruction.NumDstRegs; i++) {
+      uint file;
+      uint index;
+
+      file = inst->FullDstRegisters[i].DstRegister.File;
+      if (!check_file_name( ctx, file ))
+         return;
+      index = inst->FullDstRegisters[i].DstRegister.Index;
+      if (!is_register_declared( ctx, file, index ))
+         report_error( ctx, "Undeclared destination register" );
+      ctx->regs_used[file][index / BITS_IN_REG_FLAG] |= (1 << (index % BITS_IN_REG_FLAG));
+   }
+   for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
+      uint file;
+      uint index;
+
+      file = inst->FullSrcRegisters[i].SrcRegister.File;
+      if (!check_file_name( ctx, file ))
+         return;
+      index = inst->FullSrcRegisters[i].SrcRegister.Index;
+      if (!is_register_declared( ctx, file, index ))
+         report_error( ctx, "Undeclared source register" );
+      ctx->regs_used[file][index / BITS_IN_REG_FLAG] |= (1 << (index % BITS_IN_REG_FLAG));
+   }
+
+   ctx->num_instructions++;
+}
+
+static void xform_declaration(
+   struct tgsi_transform_context *xform,
+   struct tgsi_full_declaration *decl )
+{
+   struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) xform;
+   uint file;
+   uint i;
+
+   /* No declarations allowed after the first instruction.
+    */
+   if (ctx->num_instructions > 0)
+      report_error( ctx, "Instruction expected but declaration found" );
+
+   /* Check registers' validity.
+    * Mark the registers as declared.
+    */
+   file = decl->Declaration.File;
+   if (!check_file_name( ctx, file ))
+      return;
+   for (i = decl->DeclarationRange.First; i <= decl->DeclarationRange.Last; i++) {
+      if (is_register_declared( ctx, file, i ))
+         report_error( ctx, "The same register declared twice" );
+      ctx->regs_decl[file][i / BITS_IN_REG_FLAG] |= (1 << (i % BITS_IN_REG_FLAG));
+   }
+}
+
+static void xform_immediate(
+   struct tgsi_transform_context *xform,
+   struct tgsi_full_immediate *imm )
+{
+   struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) xform;
+
+   assert( ctx->num_imms < MAX_REGISTERS );
+
+   /* No immediates allowed after the first instruction.
+    */
+   if (ctx->num_instructions > 0)
+      report_error( ctx, "Instruction expected but immediate found" );
+
+   /* Mark the register as declared.
+    */
+   ctx->num_imms++;
+   ctx->regs_decl[TGSI_FILE_IMMEDIATE][ctx->num_imms / BITS_IN_REG_FLAG] |= (1 << (ctx->num_imms % BITS_IN_REG_FLAG));
+
+   /* Check data type validity.
+    */
+   if (imm->Immediate.DataType != TGSI_IMM_FLOAT32) {
+      report_error( ctx, "Invalid immediate data type" );
+      return;
+   }
+}
+
+static void epilog(
+   struct tgsi_transform_context *xform )
+{
+   struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) xform;
+   uint file;
+
+   /* There must be an END instruction at the end.
+    */
+   if (ctx->index_of_END == ~0 || ctx->index_of_END != ctx->num_instructions - 1) {
+      report_error( ctx, "Expected END at end of instruction sequence" );
+   }
+
+   /* Check if all declared registers were used.
+    */
+   for (file = TGSI_FILE_NULL; file < TGSI_FILE_COUNT; file++) {
+      uint i;
+
+      for (i = 0; i < MAX_REGISTERS; i++) {
+         if (is_register_declared( ctx, file, i ) && !is_register_used( ctx, file, i )) {
+            report_warning( ctx, "Register never used" );
+         }
+      }
+   }
+
+   /* Print totals, if any.
+    */
+   if (ctx->errors || ctx->warnings)
+      debug_printf( "\n%u errors, %u warnings", ctx->errors, ctx->warnings );
+}
+
+boolean
+tgsi_sanity_check(
+   struct tgsi_token *tokens )
+{
+   struct sanity_check_ctx ctx;
+   struct tgsi_token dummy_tokens[16];
+
+   ctx.xform.transform_instruction = xform_instruction;
+   ctx.xform.transform_declaration = xform_declaration;
+   ctx.xform.transform_immediate = xform_immediate;
+   ctx.xform.epilog = epilog;
+
+   memset( ctx.regs_decl, 0, sizeof( ctx.regs_decl ) );
+   memset( ctx.regs_used, 0, sizeof( ctx.regs_used ) );
+   ctx.num_imms = 0;
+   ctx.num_instructions = 0;
+   ctx.index_of_END = ~0;
+
+   ctx.errors = 0;
+   ctx.warnings = 0;
+
+   if (tgsi_transform_shader( tokens, dummy_tokens, 16, &ctx.xform ) == -1)
+      return FALSE;
+
+   return ctx.errors > 0;
+}
diff --git a/src/gallium/auxiliary/tgsi/util/tgsi_sanity.h b/src/gallium/auxiliary/tgsi/util/tgsi_sanity.h
new file mode 100644
index 0000000000..ca45e94c7a
--- /dev/null
+++ b/src/gallium/auxiliary/tgsi/util/tgsi_sanity.h
@@ -0,0 +1,49 @@
+/**************************************************************************
+ * 
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#ifndef TGSI_SANITY_H
+#define TGSI_SANITY_H
+
+#include "pipe/p_shader_tokens.h"
+
+#if defined __cplusplus
+extern "C" {
+#endif
+
+/* Check the given token stream for errors and common mistakes.
+ * Diagnostic messages are printed out to the debug output.
+ * Returns TRUE if there are no errors, even though there could be some warnings.
+ */
+boolean
+tgsi_sanity_check(
+   struct tgsi_token *tokens );
+
+#if defined __cplusplus
+}
+#endif
+
+#endif /* TGSI_SANITY_H */