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/*
* Copyright © 2009 Intel Corporation
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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 <string.h>
#include "main/mtypes.h"
#include "prog_instruction.h"
#include "program_parser.h"
/**
* Extra assembly-level parser routines
*
* \author Ian Romanick <ian.d.romanick@intel.com>
*/
int
_mesa_parse_instruction_suffix(const struct asm_parser_state *state,
const char *suffix,
struct prog_instruction *inst)
{
inst->CondUpdate = 0;
inst->CondDst = 0;
inst->SaturateMode = SATURATE_OFF;
inst->Precision = FLOAT32;
/* The first possible suffix element is the precision specifier from
* NV_fragment_program_option.
*/
if (state->option.NV_fragment) {
switch (suffix[0]) {
case 'H':
inst->Precision = FLOAT16;
suffix++;
break;
case 'R':
inst->Precision = FLOAT32;
suffix++;
break;
case 'X':
inst->Precision = FIXED12;
suffix++;
break;
default:
break;
}
}
/* The next possible suffix element is the condition code modifier selection
* from NV_fragment_program_option.
*/
if (state->option.NV_fragment) {
if (suffix[0] == 'C') {
inst->CondUpdate = 1;
suffix++;
}
}
/* The final possible suffix element is the saturation selector from
* ARB_fragment_program.
*/
if (state->mode == ARB_fragment) {
if (strcmp(suffix, "_SAT") == 0) {
inst->SaturateMode = SATURATE_ZERO_ONE;
suffix += 4;
}
}
/* It is an error for all of the suffix string not to be consumed.
*/
return suffix[0] == '\0';
}
int
_mesa_parse_cc(const char *s)
{
int cond = 0;
switch (s[0]) {
case 'E':
if (s[1] == 'Q') {
cond = COND_EQ;
}
break;
case 'F':
if (s[1] == 'L') {
cond = COND_FL;
}
break;
case 'G':
if (s[1] == 'E') {
cond = COND_GE;
} else if (s[1] == 'T') {
cond = COND_GT;
}
break;
case 'L':
if (s[1] == 'E') {
cond = COND_LE;
} else if (s[1] == 'T') {
cond = COND_LT;
}
break;
case 'N':
if (s[1] == 'E') {
cond = COND_NE;
}
break;
case 'T':
if (s[1] == 'R') {
cond = COND_TR;
}
break;
default:
break;
}
return ((cond == 0) || (s[2] != '\0')) ? 0 : cond;
}
int
_mesa_ARBvp_parse_option(struct asm_parser_state *state, const char *option)
{
if (strcmp(option, "ARB_position_invariant") == 0) {
state->option.PositionInvariant = 1;
return 1;
}
return 0;
}
int
_mesa_ARBfp_parse_option(struct asm_parser_state *state, const char *option)
{
/* All of the options currently supported start with "ARB_". The code is
* currently structured with nested if-statements because eventually options
* that start with "NV_" will be supported. This structure will result in
* less churn when those options are added.
*/
if (strncmp(option, "ARB_", 4) == 0) {
/* Advance the pointer past the "ARB_" prefix.
*/
option += 4;
if (strncmp(option, "fog_", 4) == 0) {
option += 4;
if (state->option.Fog == OPTION_NONE) {
if (strcmp(option, "exp") == 0) {
state->option.Fog = OPTION_FOG_EXP;
return 1;
} else if (strcmp(option, "exp2") == 0) {
state->option.Fog = OPTION_FOG_EXP2;
return 1;
} else if (strcmp(option, "linear") == 0) {
state->option.Fog = OPTION_FOG_LINEAR;
return 1;
}
}
return 0;
} else if (strncmp(option, "precision_hint_", 15) == 0) {
option += 15;
/* The ARB_fragment_program spec, 3.11.4.5.2 says:
*
* "Only one precision control option may be specified by any given
* fragment program. A fragment program that specifies both the
* "ARB_precision_hint_fastest" and "ARB_precision_hint_nicest"
* program options will fail to load.
*/
if (strcmp(option, "nicest") == 0 && state->option.PrecisionHint != OPTION_FASTEST) {
state->option.PrecisionHint = OPTION_NICEST;
return 1;
} else if (strcmp(option, "fastest") == 0 && state->option.PrecisionHint != OPTION_NICEST) {
state->option.PrecisionHint = OPTION_FASTEST;
return 1;
}
return 0;
} else if (strcmp(option, "draw_buffers") == 0) {
/* Don't need to check extension availability because all Mesa-based
* drivers support GL_ARB_draw_buffers.
*/
state->option.DrawBuffers = 1;
return 1;
} else if (strcmp(option, "fragment_program_shadow") == 0) {
if (state->ctx->Extensions.ARB_fragment_program_shadow) {
state->option.Shadow = 1;
return 1;
}
} else if (strncmp(option, "fragment_coord_", 15) == 0) {
option += 15;
if (state->ctx->Extensions.ARB_fragment_coord_conventions) {
if (strcmp(option, "origin_upper_left") == 0) {
state->option.OriginUpperLeft = 1;
return 1;
}
else if (strcmp(option, "pixel_center_integer") == 0) {
state->option.PixelCenterInteger = 1;
return 1;
}
}
}
} else if (strncmp(option, "ATI_", 4) == 0) {
option += 4;
if (strcmp(option, "draw_buffers") == 0) {
/* Don't need to check extension availability because all Mesa-based
* drivers support GL_ATI_draw_buffers.
*/
state->option.DrawBuffers = 1;
return 1;
}
} else if (strncmp(option, "NV_fragment_program", 19) == 0) {
option += 19;
/* Other NV_fragment_program strings may be supported later.
*/
if (option[0] == '\0') {
if (state->ctx->Extensions.NV_fragment_program_option) {
state->option.NV_fragment = 1;
return 1;
}
}
}
return 0;
}
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