summaryrefslogtreecommitdiff
path: root/src/mesa/drivers/dri/r300/r300_fragprog_emit.c
blob: b75656e7ee1bb0a36b15f047db98f8c200566c77 (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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
/*
 * Copyright (C) 2005 Ben Skeggs.
 *
 * 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.
 *
 */

/**
 * \file
 *
 * Emit the r300_fragment_program_code that can be understood by the hardware.
 * Input is a pre-transformed radeon_program.
 *
 * \author Ben Skeggs <darktama@iinet.net.au>
 *
 * \author Jerome Glisse <j.glisse@gmail.com>
 *
 * \todo FogOption
 */

#include "r300_fragprog.h"

#include "radeon_program_pair.h"
#include "r300_fragprog_swizzle.h"
#include "r300_reg.h"


#define PROG_CODE \
	struct r300_fragment_program_compiler *c = (struct r300_fragment_program_compiler*)data; \
	struct r300_fragment_program_code *code = &c->code->r300

#define error(fmt, args...) do {			\
		fprintf(stderr, "%s::%s(): " fmt "\n",	\
			__FILE__, __FUNCTION__, ##args);	\
	} while(0)


static GLboolean emit_const(void* data, GLuint file, GLuint index, GLuint *hwindex)
{
	PROG_CODE;

	for (*hwindex = 0; *hwindex < code->const_nr; ++*hwindex) {
		if (code->constant[*hwindex].File == file &&
		    code->constant[*hwindex].Index == index)
			break;
	}

	if (*hwindex >= code->const_nr) {
		if (*hwindex >= R300_PFS_NUM_CONST_REGS) {
			error("Out of hw constants!\n");
			return GL_FALSE;
		}

		code->const_nr++;
		code->constant[*hwindex].File = file;
		code->constant[*hwindex].Index = index;
	}

	return GL_TRUE;
}


/**
 * Mark a temporary register as used.
 */
static void use_temporary(struct r300_fragment_program_code *code, GLuint index)
{
	if (index > code->max_temp_idx)
		code->max_temp_idx = index;
}


static GLuint translate_rgb_opcode(GLuint opcode)
{
	switch(opcode) {
	case OPCODE_CMP: return R300_ALU_OUTC_CMP;
	case OPCODE_DP3: return R300_ALU_OUTC_DP3;
	case OPCODE_DP4: return R300_ALU_OUTC_DP4;
	case OPCODE_FRC: return R300_ALU_OUTC_FRC;
	default:
		error("translate_rgb_opcode(%i): Unknown opcode", opcode);
		/* fall through */
	case OPCODE_NOP:
		/* fall through */
	case OPCODE_MAD: return R300_ALU_OUTC_MAD;
	case OPCODE_MAX: return R300_ALU_OUTC_MAX;
	case OPCODE_MIN: return R300_ALU_OUTC_MIN;
	case OPCODE_REPL_ALPHA: return R300_ALU_OUTC_REPL_ALPHA;
	}
}

static GLuint translate_alpha_opcode(GLuint opcode)
{
	switch(opcode) {
	case OPCODE_CMP: return R300_ALU_OUTA_CMP;
	case OPCODE_DP3: return R300_ALU_OUTA_DP4;
	case OPCODE_DP4: return R300_ALU_OUTA_DP4;
	case OPCODE_EX2: return R300_ALU_OUTA_EX2;
	case OPCODE_FRC: return R300_ALU_OUTA_FRC;
	case OPCODE_LG2: return R300_ALU_OUTA_LG2;
	default:
		error("translate_rgb_opcode(%i): Unknown opcode", opcode);
		/* fall through */
	case OPCODE_NOP:
		/* fall through */
	case OPCODE_MAD: return R300_ALU_OUTA_MAD;
	case OPCODE_MAX: return R300_ALU_OUTA_MAX;
	case OPCODE_MIN: return R300_ALU_OUTA_MIN;
	case OPCODE_RCP: return R300_ALU_OUTA_RCP;
	case OPCODE_RSQ: return R300_ALU_OUTA_RSQ;
	}
}

/**
 * Emit one paired ALU instruction.
 */
static GLboolean emit_alu(void* data, struct radeon_pair_instruction* inst)
{
	PROG_CODE;

	if (code->alu.length >= R300_PFS_MAX_ALU_INST) {
		error("Too many ALU instructions");
		return GL_FALSE;
	}

	int ip = code->alu.length++;
	int j;
	code->node[code->cur_node].alu_end++;

	code->alu.inst[ip].inst0 = translate_rgb_opcode(inst->RGB.Opcode);
	code->alu.inst[ip].inst2 = translate_alpha_opcode(inst->Alpha.Opcode);

	for(j = 0; j < 3; ++j) {
		GLuint src = inst->RGB.Src[j].Index | (inst->RGB.Src[j].Constant << 5);
		if (!inst->RGB.Src[j].Constant)
			use_temporary(code, inst->RGB.Src[j].Index);
		code->alu.inst[ip].inst1 |= src << (6*j);

		src = inst->Alpha.Src[j].Index | (inst->Alpha.Src[j].Constant << 5);
		if (!inst->Alpha.Src[j].Constant)
			use_temporary(code, inst->Alpha.Src[j].Index);
		code->alu.inst[ip].inst3 |= src << (6*j);

		GLuint arg = r300FPTranslateRGBSwizzle(inst->RGB.Arg[j].Source, inst->RGB.Arg[j].Swizzle);
		arg |= inst->RGB.Arg[j].Abs << 6;
		arg |= inst->RGB.Arg[j].Negate << 5;
		code->alu.inst[ip].inst0 |= arg << (7*j);

		arg = r300FPTranslateAlphaSwizzle(inst->Alpha.Arg[j].Source, inst->Alpha.Arg[j].Swizzle);
		arg |= inst->Alpha.Arg[j].Abs << 6;
		arg |= inst->Alpha.Arg[j].Negate << 5;
		code->alu.inst[ip].inst2 |= arg << (7*j);
	}

	if (inst->RGB.Saturate)
		code->alu.inst[ip].inst0 |= R300_ALU_OUTC_CLAMP;
	if (inst->Alpha.Saturate)
		code->alu.inst[ip].inst2 |= R300_ALU_OUTA_CLAMP;

	if (inst->RGB.WriteMask) {
		use_temporary(code, inst->RGB.DestIndex);
		code->alu.inst[ip].inst1 |=
			(inst->RGB.DestIndex << R300_ALU_DSTC_SHIFT) |
			(inst->RGB.WriteMask << R300_ALU_DSTC_REG_MASK_SHIFT);
	}
	if (inst->RGB.OutputWriteMask) {
		code->alu.inst[ip].inst1 |= (inst->RGB.OutputWriteMask << R300_ALU_DSTC_OUTPUT_MASK_SHIFT);
		code->node[code->cur_node].flags |= R300_RGBA_OUT;
	}

	if (inst->Alpha.WriteMask) {
		use_temporary(code, inst->Alpha.DestIndex);
		code->alu.inst[ip].inst3 |=
			(inst->Alpha.DestIndex << R300_ALU_DSTA_SHIFT) |
			R300_ALU_DSTA_REG;
	}
	if (inst->Alpha.OutputWriteMask) {
		code->alu.inst[ip].inst3 |= R300_ALU_DSTA_OUTPUT;
		code->node[code->cur_node].flags |= R300_RGBA_OUT;
	}
	if (inst->Alpha.DepthWriteMask) {
		code->alu.inst[ip].inst3 |= R300_ALU_DSTA_DEPTH;
		code->node[code->cur_node].flags |= R300_W_OUT;
		c->fp->writes_depth = GL_TRUE;
	}

	return GL_TRUE;
}


/**
 * Finish the current node without advancing to the next one.
 */
static GLboolean finish_node(struct r300_fragment_program_compiler *c)
{
	struct r300_fragment_program_code *code = &c->code->r300;
	struct r300_fragment_program_node *node = &code->node[code->cur_node];

	if (node->alu_end < 0) {
		/* Generate a single NOP for this node */
		struct radeon_pair_instruction inst;
		_mesa_bzero(&inst, sizeof(inst));
		if (!emit_alu(c, &inst))
			return GL_FALSE;
	}

	if (node->tex_end < 0) {
		if (code->cur_node == 0) {
			node->tex_end = 0;
		} else {
			error("Node %i has no TEX instructions", code->cur_node);
			return GL_FALSE;
		}
	} else {
		if (code->cur_node == 0)
			code->first_node_has_tex = 1;
	}

	return GL_TRUE;
}


/**
 * Begin a block of texture instructions.
 * Create the necessary indirection.
 */
static GLboolean begin_tex(void* data)
{
	PROG_CODE;

	if (code->cur_node == 0) {
		if (code->node[0].alu_end < 0 &&
		    code->node[0].tex_end < 0)
			return GL_TRUE;
	}

	if (code->cur_node == 3) {
		error("Too many texture indirections");
		return GL_FALSE;
	}

	if (!finish_node(c))
		return GL_FALSE;

	struct r300_fragment_program_node *node = &code->node[++code->cur_node];
	node->alu_offset = code->alu.length;
	node->alu_end = -1;
	node->tex_offset = code->tex.length;
	node->tex_end = -1;
	return GL_TRUE;
}


static GLboolean emit_tex(void* data, struct prog_instruction* inst)
{
	PROG_CODE;

	if (code->tex.length >= R300_PFS_MAX_TEX_INST) {
		error("Too many TEX instructions");
		return GL_FALSE;
	}

	GLuint unit = inst->TexSrcUnit;
	GLuint dest = inst->DstReg.Index;
	GLuint opcode;

	switch(inst->Opcode) {
	case OPCODE_KIL: opcode = R300_TEX_OP_KIL; break;
	case OPCODE_TEX: opcode = R300_TEX_OP_LD; break;
	case OPCODE_TXB: opcode = R300_TEX_OP_TXB; break;
	case OPCODE_TXP: opcode = R300_TEX_OP_TXP; break;
	default:
		error("Unknown texture opcode %i", inst->Opcode);
		return GL_FALSE;
	}

	if (inst->Opcode == OPCODE_KIL) {
		unit = 0;
		dest = 0;
	} else {
		use_temporary(code, dest);
	}

	use_temporary(code, inst->SrcReg[0].Index);

	code->node[code->cur_node].tex_end++;
	code->tex.inst[code->tex.length++] =
		(inst->SrcReg[0].Index << R300_SRC_ADDR_SHIFT) |
		(dest << R300_DST_ADDR_SHIFT) |
		(unit << R300_TEX_ID_SHIFT) |
		(opcode << R300_TEX_INST_SHIFT);
	return GL_TRUE;
}


static const struct radeon_pair_handler pair_handler = {
	.EmitConst = &emit_const,
	.EmitPaired = &emit_alu,
	.EmitTex = &emit_tex,
	.BeginTexBlock = &begin_tex,
	.MaxHwTemps = R300_PFS_NUM_TEMP_REGS
};

/**
 * Final compilation step: Turn the intermediate radeon_program into
 * machine-readable instructions.
 */
GLboolean r300BuildFragmentProgramHwCode(struct r300_fragment_program_compiler *compiler)
{
	struct r300_fragment_program_code *code = &compiler->code->r300;

	_mesa_bzero(code, sizeof(struct r300_fragment_program_code));
	code->node[0].alu_end = -1;
	code->node[0].tex_end = -1;

	if (!radeonPairProgram(compiler->r300->radeon.glCtx, compiler->program, &pair_handler, compiler))
		return GL_FALSE;

	if (!finish_node(compiler))
		return GL_FALSE;

	return GL_TRUE;
}