r300_fragprog.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

{
	s->Outputs[FRAG_RESULT_COLR].Sourced = WRITEMASK_XYZW;
	s->Outputs[FRAG_RESULT_DEPR].Sourced = WRITEMASK_W;
}


static GLuint build_dtm(GLuint depthmode)
{
	switch(depthmode) {
	default:
	case GL_LUMINANCE: return 0;
	case GL_INTENSITY: return 1;
	case GL_ALPHA: return 2;
	}
}

static GLuint build_func(GLuint comparefunc)
{
	return comparefunc - GL_NEVER;
}


/**
 * Collect all external state that is relevant for compiling the given
 * fragment program.
 */
static void build_state(
	r300ContextPtr r300,
	struct r300_fragment_program *fp,
	struct r300_fragment_program_external_state *state)
{
	int unit;

	_mesa_bzero(state, sizeof(*state));

	for(unit = 0; unit < 16; ++unit) {
		if (fp->mesa_program.Base.ShadowSamplers & (1 << unit)) {
			struct gl_texture_object* tex = r300->radeon.glCtx->Texture.Unit[unit]._Current;

			state->unit[unit].depth_texture_mode = build_dtm(tex->DepthMode);
			state->unit[unit].texture_compare_func = build_func(tex->CompareFunc);
		}
	}
}


void r300TranslateFragmentShader(r300ContextPtr r300,
				 struct r300_fragment_program *fp)
{
	struct r300_fragment_program_external_state state;

	build_state(r300, fp, &state);
	if (_mesa_memcmp(&fp->state, &state, sizeof(state))) {
		/* TODO: cache compiled programs */
		fp->translated = GL_FALSE;
		_mesa_memcpy(&fp->state, &state, sizeof(state));
	}

	if (!fp->translated) {
		struct r300_fragment_program_compiler compiler;

		compiler.r300 = r300;
		compiler.fp = fp;
		compiler.code = &fp->code;
		compiler.program = _mesa_clone_program(r300->radeon.glCtx, &fp->mesa_program.Base);

		if (RADEON_DEBUG & DEBUG_PIXEL) {
			_mesa_printf("Fragment Program: Initial program:\n");
			_mesa_print_program(compiler.program);
		}

		insert_WPOS_trailer(&compiler);

		struct radeon_program_transformation transformations[] = {
			{ &transform_TEX, &compiler },
			{ &radeonTransformALU, 0 },
			{ &radeonTransformTrigSimple, 0 }
		};
		radeonLocalTransform(
			r300->radeon.glCtx,
			compiler.program,
			3, transformations);

		if (RADEON_DEBUG & DEBUG_PIXEL) {
			_mesa_printf("Fragment Program: After native rewrite:\n");
			_mesa_print_program(compiler.program);
		}

		struct radeon_nqssadce_descr nqssadce = {
			.Init = &nqssadce_init,
			.IsNativeSwizzle = &r300FPIsNativeSwizzle,
			.BuildSwizzle = &r300FPBuildSwizzle,
			.RewriteDepthOut = GL_TRUE
		};
		radeonNqssaDce(r300->radeon.glCtx, compiler.program, &nqssadce);

		if (RADEON_DEBUG & DEBUG_PIXEL) {
			_mesa_printf("Compiler: after NqSSA-DCE:\n");
			_mesa_print_program(compiler.program);
		}

		if (!r300FragmentProgramEmit(&compiler))
			fp->error = GL_TRUE;

		/* Subtle: Rescue any parameters that have been added during transformations */
		_mesa_free_parameter_list(fp->mesa_program.Base.Parameters);
		fp->mesa_program.Base.Parameters = compiler.program->Parameters;
		compiler.program->Parameters = 0;

		_mesa_reference_program(r300->radeon.glCtx, &compiler.program, NULL);

		if (!fp->error)
			fp->translated = GL_TRUE;
		if (fp->error || (RADEON_DEBUG & DEBUG_PIXEL))
			r300FragmentProgramDump(fp, &fp->code);
		r300UpdateStateParameters(r300->radeon.glCtx, _NEW_PROGRAM);
	}

	update_params(r300, fp);
}

/* just some random things... */
void r300FragmentProgramDump(
	struct r300_fragment_program *fp,
	struct r300_fragment_program_code *code)
{
	int n, i, j;
	static int pc = 0;

	fprintf(stderr, "pc=%d*************************************\n", pc++);

	fprintf(stderr, "Hardware program\n");
	fprintf(stderr, "----------------\n");

	for (n = 0; n < (code->cur_node + 1); n++) {
		fprintf(stderr, "NODE %d: alu_offset: %d, tex_offset: %d, "
			"alu_end: %d, tex_end: %d, flags: %08x\n", n,
			code->node[n].alu_offset,
			code->node[n].tex_offset,
			code->node[n].alu_end, code->node[n].tex_end,
			code->node[n].flags);

		if (n > 0 || code->first_node_has_tex) {
			fprintf(stderr, "  TEX:\n");
			for (i = code->node[n].tex_offset;
			     i <= code->node[n].tex_offset + code->node[n].tex_end;
			     ++i) {
				const char *instr;

				switch ((code->tex.
					 inst[i] >> R300_TEX_INST_SHIFT) &
					15) {
				case R300_TEX_OP_LD:
					instr = "TEX";
					break;
				case R300_TEX_OP_KIL:
					instr = "KIL";
					break;
				case R300_TEX_OP_TXP:
					instr = "TXP";
					break;
				case R300_TEX_OP_TXB:
					instr = "TXB";
					break;
				default:
					instr = "UNKNOWN";
				}

				fprintf(stderr,
					"    %s t%i, %c%i, texture[%i]   (%08x)\n",
					instr,
					(code->tex.
					 inst[i] >> R300_DST_ADDR_SHIFT) & 31,
					't',
					(code->tex.
					 inst[i] >> R300_SRC_ADDR_SHIFT) & 31,
					(code->tex.
					 inst[i] & R300_TEX_ID_MASK) >>
					R300_TEX_ID_SHIFT,
					code->tex.inst[i]);
			}
		}

		for (i = code->node[n].alu_offset;
		     i <= code->node[n].alu_offset + code->node[n].alu_end; ++i) {
			char srcc[3][10], dstc[20];
			char srca[3][10], dsta[20];
			char argc[3][20];
			char arga[3][20];
			char flags[5], tmp[10];

			for (j = 0; j < 3; ++j) {
				int regc = code->alu.inst[i].inst1 >> (j * 6);
				int rega = code->alu.inst[i].inst3 >> (j * 6);

				sprintf(srcc[j], "%c%i",
					(regc & 32) ? 'c' : 't', regc & 31);
				sprintf(srca[j], "%c%i",
					(rega & 32) ? 'c' : 't', rega & 31);
			}

			dstc[0] = 0;
			sprintf(flags, "%s%s%s",
				(code->alu.inst[i].
				 inst1 & R300_ALU_DSTC_REG_X) ? "x" : "",
				(code->alu.inst[i].
				 inst1 & R300_ALU_DSTC_REG_Y) ? "y" : "",
				(code->alu.inst[i].
				 inst1 & R300_ALU_DSTC_REG_Z) ? "z" : "");
			if (flags[0] != 0) {
				sprintf(dstc, "t%i.%s ",
					(code->alu.inst[i].
					 inst1 >> R300_ALU_DSTC_SHIFT) & 31,
					flags);
			}
			sprintf(flags, "%s%s%s",
				(code->alu.inst[i].
				 inst1 & R300_ALU_DSTC_OUTPUT_X) ? "x" : "",
				(code->alu.inst[i].
				 inst1 & R300_ALU_DSTC_OUTPUT_Y) ? "y" : "",
				(code->alu.inst[i].
				 inst1 & R300_ALU_DSTC_OUTPUT_Z) ? "z" : "");
			if (flags[0] != 0) {
				sprintf(tmp, "o%i.%s",
					(code->alu.inst[i].
					 inst1 >> R300_ALU_DSTC_SHIFT) & 31,
					flags);
				strcat(dstc, tmp);
			}

			dsta[0] = 0;
			if (code->alu.inst[i].inst3 & R300_ALU_DSTA_REG) {
				sprintf(dsta, "t%i.w ",
					(code->alu.inst[i].
					 inst3 >> R300_ALU_DSTA_SHIFT) & 31);
			}
			if (code->alu.inst[i].inst3 & R300_ALU_DSTA_OUTPUT) {
				sprintf(tmp, "o%i.w ",
					(code->alu.inst[i].
					 inst3 >> R300_ALU_DSTA_SHIFT) & 31);
				strcat(dsta, tmp);
			}
			if (code->alu.inst[i].inst3 & R300_ALU_DSTA_DEPTH) {
				strcat(dsta, "Z");
			}

			fprintf(stderr,
				"%3i: xyz: %3s %3s %3s -> %-20s (%08x)\n"
				"       w: %3s %3s %3s -> %-20s (%08x)\n", i,
				srcc[0], srcc[1], srcc[2], dstc,
				code->alu.inst[i].inst1, srca[0], srca[1],
				srca[2], dsta, code->alu.inst[i].inst3);

			for (j = 0; j < 3; ++j) {
				int regc = code->alu.inst[i].inst0 >> (j * 7);
				int rega = code->alu.inst[i].inst2 >> (j * 7);
				int d;
				char buf[20];

				d = regc & 31;
				if (d < 12) {
					switch (d % 4) {
					case R300_ALU_ARGC_SRC0C_XYZ:
						sprintf(buf, "%s.xyz",
							srcc[d / 4]);
						break;
					case R300_ALU_ARGC_SRC0C_XXX:
						sprintf(buf, "%s.xxx",
							srcc[d / 4]);
						break;
					case R300_ALU_ARGC_SRC0C_YYY:
						sprintf(buf, "%s.yyy",
							srcc[d / 4]);
						break;
					case R300_ALU_ARGC_SRC0C_ZZZ:
						sprintf(buf, "%s.zzz",
							srcc[d / 4]);
						break;
					}
				} else if (d < 15) {
					sprintf(buf, "%s.www", srca[d - 12]);
				} else if (d == 20) {
					sprintf(buf, "0.0");
				} else if (d == 21) {
					sprintf(buf, "1.0");
				} else if (d == 22) {
					sprintf(buf, "0.5");
				} else if (d >= 23 && d < 32) {
					d -= 23;
					switch (d / 3) {
					case 0:
						sprintf(buf, "%s.yzx",
							srcc[d % 3]);
						break;
					case 1:
						sprintf(buf, "%s.zxy",
							srcc[d % 3]);
						break;
					case 2:
						sprintf(buf, "%s.Wzy",
							srcc[d % 3]);
						break;
					}
				} else {
					sprintf(buf, "%i", d);
				}

				sprintf(argc[j], "%s%s%s%s",
					(regc & 32) ? "-" : "",
					(regc & 64) ? "|" : "",
					buf, (regc & 64) ? "|" : "");

				d = rega & 31;
				if (d < 9) {
					sprintf(buf, "%s.%c", srcc[d / 3],
						'x' + (char)(d % 3));
				} else if (d < 12) {
					sprintf(buf, "%s.w", srca[d - 9]);
				} else if (d == 16) {
					sprintf(buf, "0.0");
				} else if (d == 17) {
					sprintf(buf, "1.0");
				} else if (d == 18) {
					sprintf(buf, "0.5");
				} else {
					sprintf(buf, "%i", d);
				}

				sprintf(arga[j], "%s%s%s%s",
					(rega & 32) ? "-" : "",
					(rega & 64) ? "|" : "",
					buf, (rega & 64) ? "|" : "");
			}

			fprintf(stderr, "     xyz: %8s %8s %8s    op: %08x\n"
				"       w: %8s %8s %8s    op: %08x\n",
				argc[0], argc[1], argc[2],
				code->alu.inst[i].inst0, arga[0], arga[1],
				arga[2], code->alu.inst[i].inst2);
		}
	}
}