r500_fragprog: Major refactoring of final emit

Use an abstracted instruction scheduling and register allocation algorithm
that we will be able to share with r300_fragprog.

Unlike the original emit code, this code tries to pair instructions that
only use the RGB part of the ALU with instructions that only use the alpha
part. However, the pairing algorithm still has some shortcomings;
for example, it doesn't generate optimal code for the emulation of LIT.

1 files changed, 126 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/r300/radeon_program_pair.h b/src/mesa/drivers/dri/r300/radeon_program_pair.h
new file mode 100644
index 0000000..b2bdd08
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/radeon_program_pair.h
@@ -0,0 +1,126 @@
+/*
+ * 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.
+ *
+ */
+
+#ifndef __RADEON_PROGRAM_PAIR_H_
+#define __RADEON_PROGRAM_PAIR_H_
+
+#include "radeon_program.h"
+
+
+/**
+ * Represents a paired instruction, as found in R300 and R500
+ * fragment programs.
+ */
+struct radeon_pair_instruction_source {
+	GLuint Index:8;
+	GLuint Constant:1;
+	GLuint Used:1;
+};
+
+struct radeon_pair_instruction_rgb {
+	GLuint Opcode:8;
+	GLuint DestIndex:8;
+	GLuint WriteMask:3;
+	GLuint OutputWriteMask:3;
+	GLuint Saturate:1;
+
+	struct radeon_pair_instruction_source Src[3];
+
+	struct {
+		GLuint Source:2;
+		GLuint Swizzle:9;
+		GLuint Abs:1;
+		GLuint Negate:1;
+	} Arg[3];
+};
+
+struct radeon_pair_instruction_alpha {
+	GLuint Opcode:8;
+	GLuint DestIndex:8;
+	GLuint WriteMask:1;
+	GLuint OutputWriteMask:1;
+	GLuint DepthWriteMask:1;
+	GLuint Saturate:1;
+
+	struct radeon_pair_instruction_source Src[3];
+
+	struct {
+		GLuint Source:2;
+		GLuint Swizzle:3;
+		GLuint Abs:1;
+		GLuint Negate:1;
+	} Arg[3];
+};
+
+struct radeon_pair_instruction {
+	struct radeon_pair_instruction_rgb RGB;
+	struct radeon_pair_instruction_alpha Alpha;
+};
+
+
+/**
+ *
+ */
+struct radeon_pair_handler {
+	/**
+	 * Fill in the proper hardware index for the given constant register.
+	 *
+	 * @return GL_FALSE on error.
+	 */
+	GLboolean (*EmitConst)(void*, GLuint file, GLuint index, GLuint *hwindex);
+
+	/**
+	 * Write a paired instruction to the hardware.
+	 *
+	 * @return GL_FALSE on error.
+	 */
+	GLboolean (*EmitPaired)(void*, struct radeon_pair_instruction*);
+
+	/**
+	 * Write a texture instruction to the hardware.
+	 * Register indices have already been rewritten to the allocated
+	 * hardware register numbers.
+	 *
+	 * @return GL_FALSE on error.
+	 */
+	GLboolean (*EmitTex)(void*, struct prog_instruction*);
+
+	/**
+	 * Called after a block of contiguous, independent texture
+	 * instructions has been emitted.
+	 */
+	void (*EndTexBlock)(void*);
+
+	GLuint MaxHwTemps;
+};
+
+GLboolean radeonPairProgram(GLcontext *ctx, struct gl_program *program,
+	const struct radeon_pair_handler*, void *userdata);
+
+void radeonPrintPairInstruction(struct radeon_pair_instruction *inst);
+
+#endif /* __RADEON_PROGRAM_PAIR_H_ */