summaryrefslogtreecommitdiff
path: root/src/mesa/drivers/dri/r300/compiler/radeon_program.c
blob: b636f90a968c929d2426aac169910089c65d7efe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/*
 * 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"

#include "radeon_compiler.h"
#include "shader/prog_parameter.h"
#include "shader/prog_print.h"


/**
 * Transform the given clause in the following way:
 *  1. Replace it with an empty clause
 *  2. For every instruction in the original clause, try the given
 *     transformations in order.
 *  3. If one of the transformations returns GL_TRUE, assume that it
 *     has emitted the appropriate instruction(s) into the new clause;
 *     otherwise, copy the instruction verbatim.
 *
 * \note The transformation is currently not recursive; in other words,
 * instructions emitted by transformations are not transformed.
 *
 * \note The transform is called 'local' because it can only look at
 * one instruction at a time.
 */
void radeonLocalTransform(
	struct radeon_compiler * c,
	int num_transformations,
	struct radeon_program_transformation* transformations)
{
	struct rc_instruction * inst = c->Program.Instructions.Next;

	while(inst != &c->Program.Instructions) {
		struct rc_instruction * current = inst;
		int i;

		inst = inst->Next;

		for(i = 0; i < num_transformations; ++i) {
			struct radeon_program_transformation* t = transformations + i;

			if (t->function(c, current, t->userData))
				break;
		}
	}
}


GLint rc_find_free_temporary(struct radeon_compiler * c)
{
	GLboolean used[MAX_PROGRAM_TEMPS];
	GLuint i;

	memset(used, 0, sizeof(used));

	for (struct rc_instruction * rcinst = c->Program.Instructions.Next; rcinst != &c->Program.Instructions; rcinst = rcinst->Next) {
		const struct prog_instruction *inst = &rcinst->I;
		const GLuint nsrc = _mesa_num_inst_src_regs(inst->Opcode);
		const GLuint ndst = _mesa_num_inst_dst_regs(inst->Opcode);
		GLuint k;

		for (k = 0; k < nsrc; k++) {
			if (inst->SrcReg[k].File == PROGRAM_TEMPORARY)
				used[inst->SrcReg[k].Index] = GL_TRUE;
		}

		if (ndst) {
			if (inst->DstReg.File == PROGRAM_TEMPORARY)
				used[inst->DstReg.Index] = GL_TRUE;
		}
	}

	for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
		if (!used[i])
			return i;
	}

	return -1;
}


struct rc_instruction *rc_alloc_instruction(struct radeon_compiler * c)
{
	struct rc_instruction * inst = memory_pool_malloc(&c->Pool, sizeof(struct rc_instruction));

	inst->Prev = 0;
	inst->Next = 0;

	_mesa_init_instructions(&inst->I, 1);

	return inst;
}


struct rc_instruction *rc_insert_new_instruction(struct radeon_compiler * c, struct rc_instruction * after)
{
	struct rc_instruction * inst = rc_alloc_instruction(c);

	inst->Prev = after;
	inst->Next = after->Next;

	inst->Prev->Next = inst;
	inst->Next->Prev = inst;

	return inst;
}

void rc_remove_instruction(struct rc_instruction * inst)
{
	inst->Prev->Next = inst->Next;
	inst->Next->Prev = inst->Prev;
}


void rc_mesa_to_rc_program(struct radeon_compiler * c, struct gl_program * program)
{
	struct prog_instruction *source;
	unsigned int i;

	for(source = program->Instructions; source->Opcode != OPCODE_END; ++source) {
		struct rc_instruction * dest = rc_insert_new_instruction(c, c->Program.Instructions.Prev);
		dest->I = *source;
	}

	c->Program.ShadowSamplers = program->ShadowSamplers;
	c->Program.InputsRead = program->InputsRead;
	c->Program.OutputsWritten = program->OutputsWritten;

	int isNVProgram = 0;

	if (program->Target == GL_VERTEX_PROGRAM_ARB) {
		struct gl_vertex_program * vp = (struct gl_vertex_program *) program;
		isNVProgram = vp->IsNVProgram;
	}

	if (isNVProgram) {
		/* NV_vertex_program has a fixed-sized constant environment.
		 * This could be handled more efficiently for programs that
		 * do not use relative addressing.
		 */
		for(i = 0; i < 96; ++i) {
			struct rc_constant constant;

			constant.Type = RC_CONSTANT_EXTERNAL;
			constant.Size = 4;
			constant.u.External = i;

			rc_constants_add(&c->Program.Constants, &constant);
		}
	} else {
		for(i = 0; i < program->Parameters->NumParameters; ++i) {
			struct rc_constant constant;

			constant.Type = RC_CONSTANT_EXTERNAL;
			constant.Size = 4;
			constant.u.External = i;

			rc_constants_add(&c->Program.Constants, &constant);
		}
	}
}


/**
 * Print program to stderr, default options.
 */
void rc_print_program(const struct rc_program *prog)
{
	GLuint indent = 0;
	GLuint linenum = 1;
	struct rc_instruction *inst;

	fprintf(stderr, "# Radeon Compiler Program\n");

	for(inst = prog->Instructions.Next; inst != &prog->Instructions; inst = inst->Next) {
		fprintf(stderr, "%3d: ", linenum);

		/* Massive hack: We rely on the fact that the printers do not actually
		 * use the gl_program argument (last argument) in debug mode */
		indent = _mesa_fprint_instruction_opt(
				stderr, &inst->I,
				indent, PROG_PRINT_DEBUG, 0);

		linenum++;
	}
}