r300: Add radeon_program and trivial refactoring of r300_fragprog to use it

The idea/hope is that radeon_program will serve as an intermediate
representation for r3xx up to r6xx fragment and vertex programs.
Right now, it is nothing more than a simplistic wrapper around Mesa's
prog_instruction, together with the notion of clauses, taken from r6xx docs.

The clauses will eventually be used to represent the nodes that are used in
r300 family fragment programs.

1 files changed, 151 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/r300/radeon_program.c b/src/mesa/drivers/dri/r300/radeon_program.c
new file mode 100644
index 00000000000..7b03fa65236
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/radeon_program.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2008 Nicolai Haehnle.
+ *
+ * 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, sublicense, 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 NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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 "radeon_program.h"
+
+
+/**
+ * Initialize a compiler structure with a single mixed clause
+ * containing all instructions from the source program.
+ */
+void radeonCompilerInit(
+	struct radeon_compiler *compiler,
+	GLcontext *ctx,
+	struct gl_program *source)
+{
+	struct radeon_clause* clause;
+
+	_mesa_memset(compiler, 0, sizeof(*compiler));
+	compiler->Source = source;
+	compiler->Ctx = ctx;
+
+	compiler->NumTemporaries = source->NumTemporaries;
+
+	clause = radeonCompilerInsertClause(compiler, 0, CLAUSE_MIXED);
+	clause->NumInstructions = 0;
+	while(source->Instructions[clause->NumInstructions].Opcode != OPCODE_END)
+		clause->NumInstructions++;
+	clause->ReservedInstructions = clause->NumInstructions;
+	clause->Instructions = _mesa_alloc_instructions(clause->NumInstructions);
+	_mesa_copy_instructions(clause->Instructions, source->Instructions, clause->NumInstructions);
+}
+
+
+/**
+ * Free all data that is referenced by the compiler structure.
+ * However, the compiler structure itself is not freed.
+ */
+void radeonCompilerCleanup(struct radeon_compiler *compiler)
+{
+	radeonCompilerEraseClauses(compiler, 0, compiler->NumClauses);
+}
+
+
+/**
+ * Allocate and return a unique temporary register.
+ */
+int radeonCompilerAllocateTemporary(struct radeon_compiler *compiler)
+{
+	if (compiler->NumTemporaries >= 256) {
+		_mesa_problem(compiler->Ctx, "radeonCompiler: Too many temporaries");
+		return 0;
+	}
+
+	return compiler->NumTemporaries++;
+}
+
+
+/**
+ * \p position index of the new clause; later clauses are moved
+ * \p type of the new clause; one of CLAUSE_XXX
+ * \return a pointer to the new clause
+ */
+struct radeon_clause* radeonCompilerInsertClause(
+	struct radeon_compiler *compiler,
+	int position, int type)
+{
+	struct radeon_clause* oldClauses = compiler->Clauses;
+	struct radeon_clause* clause;
+
+	assert(position >= 0 && position <= compiler->NumClauses);
+
+	compiler->Clauses = (struct radeon_clause *)
+		_mesa_malloc((compiler->NumClauses+1) * sizeof(struct radeon_clause));
+	if (oldClauses) {
+		_mesa_memcpy(compiler->Clauses, oldClauses,
+			position*sizeof(struct radeon_clause));
+		_mesa_memcpy(compiler->Clauses+position+1, oldClauses+position,
+			(compiler->NumClauses - position) * sizeof(struct radeon_clause));
+		_mesa_free(oldClauses);
+	}
+	compiler->NumClauses++;
+
+	clause = compiler->Clauses + position;
+	_mesa_memset(clause, 0, sizeof(*clause));
+	clause->Type = type;
+
+	return clause;
+}
+
+
+/**
+ * Remove clauses in the range [start, end)
+ */
+void radeonCompilerEraseClauses(
+	struct radeon_compiler *compiler,
+	int start, int end)
+{
+	struct radeon_clause* oldClauses = compiler->Clauses;
+	int i;
+
+	assert(0 <= start);
+	assert(start <= end);
+	assert(end <= compiler->NumClauses);
+
+	if (end == start)
+		return;
+
+	for(i = start; i < end; ++i) {
+		struct radeon_clause* clause = oldClauses + i;
+		_mesa_free_instructions(clause->Instructions, clause->NumInstructions);
+	}
+
+	if (start > 0 || end < compiler->NumClauses) {
+		compiler->Clauses = (struct radeon_clause*)
+			_mesa_malloc((compiler->NumClauses+start-end) * sizeof(struct radeon_clause));
+		_mesa_memcpy(compiler->Clauses, oldClauses,
+			start * sizeof(struct radeon_clause));
+		_mesa_memcpy(compiler->Clauses + start, oldClauses + end,
+			(compiler->NumClauses - end) * sizeof(struct radeon_clause));
+		compiler->NumClauses -= end - start;
+	} else {
+		compiler->Clauses = 0;
+		compiler->NumClauses = 0;
+	}
+
+	_mesa_free(oldClauses);
+}