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-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_sanity.c341
1 files changed, 341 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_sanity.c b/src/gallium/auxiliary/tgsi/tgsi_sanity.c
new file mode 100644
index 00000000000..2e3ec96b5b5
--- /dev/null
+++ b/src/gallium/auxiliary/tgsi/tgsi_sanity.c
@@ -0,0 +1,341 @@
+/**************************************************************************
+ *
+ * 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_iterate.h"
+
+#define MAX_REGISTERS 256
+
+typedef uint reg_flag;
+
+#define BITS_IN_REG_FLAG (sizeof( reg_flag ) * 8)
+
+struct sanity_check_ctx
+{
+ struct tgsi_iterate_context iter;
+
+ reg_flag regs_decl[TGSI_FILE_COUNT][MAX_REGISTERS / BITS_IN_REG_FLAG];
+ reg_flag regs_used[TGSI_FILE_COUNT][MAX_REGISTERS / BITS_IN_REG_FLAG];
+ boolean regs_ind_used[TGSI_FILE_COUNT];
+ 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 *format,
+ ... )
+{
+ va_list args;
+
+ debug_printf( "Error : " );
+ va_start( args, format );
+ _debug_vprintf( format, args );
+ va_end( args );
+ debug_printf( "\n" );
+ ctx->errors++;
+}
+
+static void
+report_warning(
+ struct sanity_check_ctx *ctx,
+ const char *format,
+ ... )
+{
+ va_list args;
+
+ debug_printf( "Warning: " );
+ va_start( args, format );
+ _debug_vprintf( format, args );
+ va_end( args );
+ debug_printf( "\n" );
+ 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 register file name" );
+ return FALSE;
+ }
+ return TRUE;
+}
+
+static boolean
+is_register_declared(
+ struct sanity_check_ctx *ctx,
+ uint file,
+ int index )
+{
+ assert( index >= 0 && index < MAX_REGISTERS );
+
+ return (ctx->regs_decl[file][index / BITS_IN_REG_FLAG] & (1 << (index % BITS_IN_REG_FLAG))) ? TRUE : FALSE;
+}
+
+static boolean
+is_any_register_declared(
+ struct sanity_check_ctx *ctx,
+ uint file )
+{
+ uint i;
+
+ for (i = 0; i < MAX_REGISTERS / BITS_IN_REG_FLAG; i++)
+ if (ctx->regs_decl[file][i])
+ return TRUE;
+ return FALSE;
+}
+
+static boolean
+is_register_used(
+ struct sanity_check_ctx *ctx,
+ uint file,
+ int index )
+{
+ assert( index < MAX_REGISTERS );
+
+ return (ctx->regs_used[file][index / BITS_IN_REG_FLAG] & (1 << (index % BITS_IN_REG_FLAG))) ? TRUE : FALSE;
+}
+
+static const char *file_names[] =
+{
+ "NULL",
+ "CONST",
+ "IN",
+ "OUT",
+ "TEMP",
+ "SAMP",
+ "ADDR",
+ "IMM"
+};
+
+static boolean
+check_register_usage(
+ struct sanity_check_ctx *ctx,
+ uint file,
+ int index,
+ const char *name,
+ boolean indirect_access )
+{
+ if (!check_file_name( ctx, file ))
+ return FALSE;
+ if (indirect_access) {
+ if (!is_any_register_declared( ctx, file ))
+ report_error( ctx, "%s: Undeclared %s register", file_names[file], name );
+ ctx->regs_ind_used[file] = TRUE;
+ }
+ else {
+ if (!is_register_declared( ctx, file, index ))
+ report_error( ctx, "%s[%d]: Undeclared %s register", file_names[file], index, name );
+ ctx->regs_used[file][index / BITS_IN_REG_FLAG] |= (1 << (index % BITS_IN_REG_FLAG));
+ }
+ return TRUE;
+}
+
+static boolean
+iter_instruction(
+ struct tgsi_iterate_context *iter,
+ struct tgsi_full_instruction *inst )
+{
+ struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) iter;
+ 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++) {
+ check_register_usage(
+ ctx,
+ inst->FullDstRegisters[i].DstRegister.File,
+ inst->FullDstRegisters[i].DstRegister.Index,
+ "destination",
+ FALSE );
+ }
+ for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
+ check_register_usage(
+ ctx,
+ inst->FullSrcRegisters[i].SrcRegister.File,
+ inst->FullSrcRegisters[i].SrcRegister.Index,
+ "source",
+ (boolean)inst->FullSrcRegisters[i].SrcRegister.Indirect );
+ if (inst->FullSrcRegisters[i].SrcRegister.Indirect) {
+ uint file;
+ int index;
+
+ file = inst->FullSrcRegisters[i].SrcRegisterInd.File;
+ index = inst->FullSrcRegisters[i].SrcRegisterInd.Index;
+ check_register_usage(
+ ctx,
+ file,
+ index,
+ "indirect",
+ FALSE );
+ if (file != TGSI_FILE_ADDRESS || index != 0)
+ report_warning( ctx, "Indirect register not ADDR[0]" );
+ }
+ }
+
+ ctx->num_instructions++;
+
+ return TRUE;
+}
+
+static boolean
+iter_declaration(
+ struct tgsi_iterate_context *iter,
+ struct tgsi_full_declaration *decl )
+{
+ struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) iter;
+ 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 TRUE;
+ 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));
+ }
+
+ return TRUE;
+}
+
+static boolean
+iter_immediate(
+ struct tgsi_iterate_context *iter,
+ struct tgsi_full_immediate *imm )
+{
+ struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) iter;
+
+ 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->regs_decl[TGSI_FILE_IMMEDIATE][ctx->num_imms / BITS_IN_REG_FLAG] |= (1 << (ctx->num_imms % BITS_IN_REG_FLAG));
+ ctx->num_imms++;
+
+ /* Check data type validity.
+ */
+ if (imm->Immediate.DataType != TGSI_IMM_FLOAT32) {
+ report_error( ctx, "Invalid immediate data type" );
+ return TRUE;
+ }
+
+ return TRUE;
+}
+
+static boolean
+epilog(
+ struct tgsi_iterate_context *iter )
+{
+ struct sanity_check_ctx *ctx = (struct sanity_check_ctx *) iter;
+ 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 ) && !ctx->regs_ind_used[file]) {
+ 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 );
+
+ return TRUE;
+}
+
+boolean
+tgsi_sanity_check(
+ struct tgsi_token *tokens )
+{
+ struct sanity_check_ctx ctx;
+
+ ctx.iter.prolog = NULL;
+ ctx.iter.iterate_instruction = iter_instruction;
+ ctx.iter.iterate_declaration = iter_declaration;
+ ctx.iter.iterate_immediate = iter_immediate;
+ ctx.iter.epilog = epilog;
+
+ memset( ctx.regs_decl, 0, sizeof( ctx.regs_decl ) );
+ memset( ctx.regs_used, 0, sizeof( ctx.regs_used ) );
+ memset( ctx.regs_ind_used, 0, sizeof( ctx.regs_ind_used ) );
+ ctx.num_imms = 0;
+ ctx.num_instructions = 0;
+ ctx.index_of_END = ~0;
+
+ ctx.errors = 0;
+ ctx.warnings = 0;
+
+ if (!tgsi_iterate_shader( tokens, &ctx.iter ))
+ return FALSE;
+
+ return ctx.errors == 0;
+}
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