/
mojoshader.c
7642 lines (6452 loc) · 246 KB
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/**
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* MojoShader; generate shader programs from bytecode of compiled
* Direct3D shaders.
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*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
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// !!! FIXME: this file really needs to be split up.
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// !!! FIXME: I keep changing coding styles for symbols and typedefs.
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#define __MOJOSHADER_INTERNAL__ 1
#include "mojoshader_internal.h"
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// predeclare.
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typedef struct Context Context;
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struct ConstantsList;
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// one emit function for each opcode in each profile.
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typedef void (*emit_function)(Context *ctx);
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// one emit function for starting output in each profile.
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typedef void (*emit_start)(Context *ctx, const char *profilestr);
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// one emit function for ending output in each profile.
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typedef void (*emit_end)(Context *ctx);
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// one emit function for phase opcode output in each profile.
typedef void (*emit_phase)(Context *ctx);
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// one emit function for finalizing output in each profile.
typedef void (*emit_finalize)(Context *ctx);
// one emit function for global definitions in each profile.
typedef void (*emit_global)(Context *ctx, RegisterType regtype, int regnum);
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// one emit function for relative uniform arrays in each profile.
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typedef void (*emit_array)(Context *ctx, int base, int size);
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// one emit function for relative constants arrays in each profile.
typedef void (*emit_const_array)(Context *ctx,
const struct ConstantsList *constslist,
int base, int size);
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// one emit function for uniforms in each profile.
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typedef void (*emit_uniform)(Context *ctx, RegisterType regtype, int regnum,
int arraybase, int arraysize);
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// one emit function for samplers in each profile.
typedef void (*emit_sampler)(Context *ctx, int stage, TextureType ttype);
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// one emit function for attributes in each profile.
typedef void (*emit_attribute)(Context *ctx, RegisterType regtype, int regnum,
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MOJOSHADER_usage usage, int index, int wmask,
int flags);
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// one args function for each possible sequence of opcode arguments.
typedef int (*args_function)(Context *ctx);
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// one state function for each opcode where we have state machine updates.
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typedef void (*state_function)(Context *ctx);
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// one function for varnames in each profile.
typedef const char *(*varname_function)(Context *c, RegisterType t, int num);
// one function for const var array in each profile.
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typedef const char *(*const_array_varname_function)(Context *c, int base, int size);
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typedef struct
{
const char *name;
emit_start start_emitter;
emit_end end_emitter;
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emit_phase phase_emitter;
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emit_global global_emitter;
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emit_array array_emitter;
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emit_const_array const_array_emitter;
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emit_uniform uniform_emitter;
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emit_sampler sampler_emitter;
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emit_attribute attribute_emitter;
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emit_finalize finalize_emitter;
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varname_function get_varname;
const_array_varname_function get_const_array_varname;
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} Profile;
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// A simple linked list of strings, so we can build the final output without
// realloc()ing for each new line, and easily insert lines into the middle
// of the output without much trouble.
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typedef struct OutputListNode
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{
char *str;
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struct OutputListNode *next;
} OutputListNode;
typedef struct OutputList
{
OutputListNode head;
OutputListNode *tail;
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} OutputList;
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typedef struct ConstantsList
{
MOJOSHADER_constant constant;
struct ConstantsList *next;
} ConstantsList;
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typedef struct VariableList
{
MOJOSHADER_uniformType type;
int index;
int count;
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ConstantsList *constant;
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int used;
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struct VariableList *next;
} VariableList;
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typedef struct RegisterList
{
RegisterType regtype;
int regnum;
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MOJOSHADER_usage usage;
int index;
int writemask;
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int misc;
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const VariableList *array;
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struct RegisterList *next;
} RegisterList;
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typedef struct
{
const uint32 *token; // this is the unmolested token in the stream.
int regnum;
int swizzle; // xyzw (all four, not split out).
int swizzle_x;
int swizzle_y;
int swizzle_z;
int swizzle_w;
SourceMod src_mod;
RegisterType regtype;
int relative;
RegisterType relative_regtype;
int relative_regnum;
int relative_component;
const VariableList *relative_array;
} SourceArgInfo;
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#define SCRATCH_BUFFER_SIZE 128
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#define SCRATCH_BUFFERS 32
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// !!! FIXME: the scratch buffers make Context pretty big.
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// !!! FIXME: might be worth having one set of static scratch buffers that
// !!! FIXME: are mutex protected?
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// Context...this is state that changes as we parse through a shader...
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struct Context
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{
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int isfail;
int out_of_memory;
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MOJOSHADER_malloc malloc;
MOJOSHADER_free free;
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void *malloc_data;
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const uint32 *orig_tokens;
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const uint32 *tokens;
uint32 tokencount;
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MOJOSHADER_parsePhase parse_phase;
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const MOJOSHADER_swizzle *swizzles;
unsigned int swizzles_count;
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OutputList *output;
OutputList globals;
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OutputList helpers;
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OutputList subroutines;
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OutputList mainline_intro;
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OutputList mainline;
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OutputList ignore;
OutputList *output_stack[2];
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uint8 *output_bytes; // can be used instead of the OutputLists.
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int indent_stack[2];
int output_stack_len;
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int output_len; // total strlen; prevents walking the lists just to malloc.
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int indent;
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const char *shader_type_str;
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const char *endline;
int endline_len;
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char scratch[SCRATCH_BUFFERS][SCRATCH_BUFFER_SIZE];
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int scratchidx; // current scratch buffer.
int profileid;
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const Profile *profile;
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MOJOSHADER_shaderType shader_type;
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uint8 major_ver;
uint8 minor_ver;
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DestArgInfo dest_arg;
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SourceArgInfo source_args[5];
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SourceArgInfo predicate_arg; // for predicated instructions.
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uint32 dwords[4];
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uint32 version_token;
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int instruction_count;
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uint32 instruction_controls;
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uint32 previous_opcode;
int loops;
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int reps;
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int max_reps;
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int cmps;
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int scratch_registers;
int max_scratch_registers;
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int branch_labels_stack_index;
int branch_labels_stack[32];
int assigned_branch_labels;
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int assigned_vertex_attributes;
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int last_address_reg_component;
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RegisterList used_registers;
RegisterList defined_registers;
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int error_count;
ErrorList *errors;
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int constant_count;
ConstantsList *constants;
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int uniform_count;
RegisterList uniforms;
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int attribute_count;
RegisterList attributes;
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int sampler_count;
RegisterList samplers;
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VariableList *variables; // variables to register mapping.
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int centroid_allowed;
int have_ctab;
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int have_relative_input_registers;
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int determined_constants_arrays;
int predicated;
int support_nv2;
int support_nv3;
int support_nv4;
int support_glsl120;
int glsl_generated_lit_opcode;
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};
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// Convenience functions for allocators...
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static MOJOSHADER_error out_of_mem_error = { "Out of memory", NULL, -1 };
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MOJOSHADER_parseData out_of_mem_data = {
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1, &out_of_mem_error, 0, 0, 0, 0, MOJOSHADER_TYPE_UNKNOWN, 0, 0, 0, 0
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};
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static inline void out_of_memory(Context *ctx)
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{
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ctx->isfail = ctx->out_of_memory = 1;
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} // out_of_memory
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static inline void *Malloc(Context *ctx, const size_t len)
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{
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void *retval = ctx->malloc((int) len, ctx->malloc_data);
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if (retval == NULL)
out_of_memory(ctx);
return retval;
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} // Malloc
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static inline char *StrDup(Context *ctx, const char *str)
{
char *retval = (char *) Malloc(ctx, strlen(str) + 1);
if (retval == NULL)
out_of_memory(ctx);
else
strcpy(retval, str);
return retval;
} // StrDup
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static inline void Free(Context *ctx, void *ptr)
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{
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if (ptr != NULL) // check for NULL in case of dumb free() impl.
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ctx->free(ptr, ctx->malloc_data);
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} // Free
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// jump between output sections in the context...
static inline void push_output(Context *ctx, OutputList *section)
{
assert(ctx->output_stack_len < STATICARRAYLEN(ctx->output_stack));
ctx->output_stack[ctx->output_stack_len] = ctx->output;
ctx->indent_stack[ctx->output_stack_len] = ctx->indent;
ctx->output_stack_len++;
ctx->output = section;
ctx->indent = 0;
} // push_output
static inline void pop_output(Context *ctx)
{
assert(ctx->output_stack_len > 0);
ctx->output_stack_len--;
ctx->output = ctx->output_stack[ctx->output_stack_len];
ctx->indent = ctx->indent_stack[ctx->output_stack_len];
} // pop_output
// Shader model version magic...
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static inline uint32 ver_ui32(const uint8 major, const uint8 minor)
{
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return ( (((uint32) major) << 16) | (((minor) == 0xFF) ? 1 : (minor)) );
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} // version_ui32
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static inline int shader_version_supported(const uint8 maj, const uint8 min)
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{
return (ver_ui32(maj,min) <= ver_ui32(MAX_SHADER_MAJOR, MAX_SHADER_MINOR));
} // shader_version_supported
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static inline int shader_version_atleast(const Context *ctx, const uint8 maj,
const uint8 min)
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{
return (ver_ui32(ctx->major_ver, ctx->minor_ver) >= ver_ui32(maj, min));
} // shader_version_atleast
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static inline int shader_version_exactly(const Context *ctx, const uint8 maj,
const uint8 min)
{
return ((ctx->major_ver == maj) && (ctx->minor_ver == min));
} // shader_version_exactly
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static inline int shader_is_pixel(const Context *ctx)
{
return (ctx->shader_type == MOJOSHADER_TYPE_PIXEL);
} // shader_is_pixel
static inline int shader_is_vertex(const Context *ctx)
{
return (ctx->shader_type == MOJOSHADER_TYPE_VERTEX);
} // shader_is_vertex
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static inline int isfail(const Context *ctx)
{
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return ctx->isfail;
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} // isfail
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static inline char *get_scratch_buffer(Context *ctx)
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{
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assert(ctx->scratchidx < SCRATCH_BUFFERS);
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ctx->scratchidx = (ctx->scratchidx + 1) % SCRATCH_BUFFERS;
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return ctx->scratch[ctx->scratchidx];
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} // get_scratch_buffer
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static void failf(Context *ctx, const char *fmt, ...) ISPRINTF(2,3);
static void failf(Context *ctx, const char *fmt, ...)
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{
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ctx->isfail = 1;
if (ctx->out_of_memory)
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return;
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int error_position = 0;
switch (ctx->parse_phase)
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{
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case MOJOSHADER_PARSEPHASE_NOTSTARTED:
error_position = -2;
break;
case MOJOSHADER_PARSEPHASE_WORKING:
error_position = (ctx->tokens - ctx->orig_tokens) * sizeof (uint32);
break;
case MOJOSHADER_PARSEPHASE_DONE:
error_position = -1;
break;
default:
assert(0 && "Unexpected value");
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return;
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} // switch
ErrorList *error = (ErrorList *) Malloc(ctx, sizeof (ErrorList));
if (error == NULL)
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return;
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char *scratch = get_scratch_buffer(ctx);
va_list ap;
va_start(ap, fmt);
const int len = vsnprintf(scratch, SCRATCH_BUFFER_SIZE, fmt, ap);
va_end(ap);
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char *failstr = (char *) Malloc(ctx, len + 1);
if (failstr == NULL)
Free(ctx, error);
else
{
// see comments about scratch buffer overflow in output_line().
if (len < SCRATCH_BUFFER_SIZE)
strcpy(failstr, scratch); // copy it over.
else
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{
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va_start(ap, fmt);
vsnprintf(failstr, len + 1, fmt, ap); // rebuild it.
va_end(ap);
} // else
error->error.error = failstr;
error->error.filename = NULL; // no filename at this level.
error->error.error_position = error_position;
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error->next = NULL;
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ErrorList *prev = NULL;
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ErrorList *item = ctx->errors;
while (item != NULL)
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{
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prev = item;
item = error->next;
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} // while
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if (prev == NULL)
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ctx->errors = error;
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else
prev->next = error;
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ctx->error_count++;
} // else
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} // failf
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static inline void fail(Context *ctx, const char *reason)
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{
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failf(ctx, "%s", reason);
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} // fail
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static void output_line(Context *ctx, const char *fmt, ...) ISPRINTF(2,3);
static void output_line(Context *ctx, const char *fmt, ...)
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{
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OutputListNode *item = NULL;
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if (isfail(ctx) || ctx->out_of_memory)
return; // we failed previously, don't go on...
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char *scratch = get_scratch_buffer(ctx);
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const int indent = ctx->indent;
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if (indent > 0)
memset(scratch, '\t', indent);
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va_list ap;
va_start(ap, fmt);
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const int len = vsnprintf(scratch+indent, SCRATCH_BUFFER_SIZE-indent, fmt, ap) + indent;
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va_end(ap);
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item = (OutputListNode *) Malloc(ctx, sizeof (OutputListNode));
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if (item == NULL)
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return;
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item->str = (char *) Malloc(ctx, len + 1);
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if (item->str == NULL)
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{
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Free(ctx, item);
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return;
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} // if
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// If we overflowed our scratch buffer, that's okay. We were going to
// allocate anyhow...the scratch buffer just lets us avoid a second
// run of vsnprintf().
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if (len < SCRATCH_BUFFER_SIZE)
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strcpy(item->str, scratch); // copy it over.
else
{
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if (indent > 0)
memset(item->str, '\t', indent);
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va_start(ap, fmt);
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vsnprintf(item->str+indent, len + 1, fmt, ap); // rebuild it.
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va_end(ap);
} // else
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item->next = NULL;
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ctx->output->tail->next = item;
ctx->output->tail = item;
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ctx->output_len += len + ctx->endline_len;
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} // output_line
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// this is just to stop gcc whining.
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static inline void output_blank_line(Context *ctx)
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{
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output_line(ctx, "%s", "");
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} // output_blank_line
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// !!! FIXME: this is sort of nasty.
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static void floatstr(Context *ctx, char *buf, size_t bufsize, float f,
int leavedecimal)
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{
const size_t len = snprintf(buf, bufsize, "%f", f);
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if ((len+2) >= bufsize)
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fail(ctx, "BUG: internal buffer is too small");
else
{
char *end = buf + len;
char *ptr = strchr(buf, '.');
if (ptr == NULL)
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{
if (leavedecimal)
strcat(buf, ".0");
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return; // done.
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} // if
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while (--end != ptr)
{
if (*end != '0')
{
end++;
break;
} // if
} // while
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if ((leavedecimal) && (end == ptr))
end += 2;
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*end = '\0'; // chop extra '0' or all decimal places off.
} // else
} // floatstr
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// Deal with register lists... !!! FIXME: I sort of hate this.
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static void free_reglist(MOJOSHADER_free f, void *d, RegisterList *item)
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{
while (item != NULL)
{
RegisterList *next = item->next;
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f(item, d);
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item = next;
} // while
} // free_reglist
static inline uint32 reg_to_ui32(const RegisterType regtype, const int regnum)
{
return ( ((uint32) regtype) | (((uint32) regnum) << 16) );
} // reg_to_uint32
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static RegisterList *reglist_insert(Context *ctx, RegisterList *prev,
const RegisterType regtype,
const int regnum)
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{
const uint32 newval = reg_to_ui32(regtype, regnum);
RegisterList *item = prev->next;
while (item != NULL)
{
const uint32 val = reg_to_ui32(item->regtype, item->regnum);
if (newval == val)
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return item; // already set, so we're done.
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else if (newval < val) // insert it here.
break;
else // if (newval > val)
{
// keep going, we're not to the insertion point yet.
prev = item;
item = item->next;
} // else
} // while
// we need to insert an entry after (prev).
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item = (RegisterList *) Malloc(ctx, sizeof (RegisterList));
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if (item != NULL)
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{
item->regtype = regtype;
item->regnum = regnum;
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item->usage = MOJOSHADER_USAGE_UNKNOWN;
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item->index = 0;
item->writemask = 0;
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item->misc = 0;
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item->array = NULL;
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item->next = prev->next;
prev->next = item;
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} // if
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return item;
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} // reglist_insert
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static RegisterList *reglist_find(const RegisterList *prev,
const RegisterType rtype, const int regnum)
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{
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const uint32 newval = reg_to_ui32(rtype, regnum);
RegisterList *item = prev->next;
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while (item != NULL)
{
const uint32 val = reg_to_ui32(item->regtype, item->regnum);
if (newval == val)
return item; // here it is.
else if (newval < val) // should have been here if it existed.
return NULL;
else // if (newval > val)
{
// keep going, we're not to the insertion point yet.
prev = item;
item = item->next;
} // else
} // while
return NULL; // wasn't in the list.
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} // reglist_find
static inline const RegisterList *reglist_exists(RegisterList *prev,
const RegisterType regtype,
const int regnum)
{
return (reglist_find(prev, regtype, regnum));
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} // reglist_exists
static inline void set_used_register(Context *ctx, const RegisterType regtype,
const int regnum)
{
reglist_insert(ctx, &ctx->used_registers, regtype, regnum);
} // set_used_register
static inline int get_used_register(Context *ctx, const RegisterType regtype,
const int regnum)
{
return (reglist_exists(&ctx->used_registers, regtype, regnum) != NULL);
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} // get_used_register
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static inline void set_defined_register(Context *ctx, const RegisterType rtype,
const int regnum)
{
reglist_insert(ctx, &ctx->defined_registers, rtype, regnum);
} // set_defined_register
static inline int get_defined_register(Context *ctx, const RegisterType rtype,
const int regnum)
{
return (reglist_exists(&ctx->defined_registers, rtype, regnum) != NULL);
} // get_defined_register
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static void add_attribute_register(Context *ctx, const RegisterType rtype,
const int regnum, const MOJOSHADER_usage usage,
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const int index, const int writemask, int flags)
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{
RegisterList *item = reglist_insert(ctx, &ctx->attributes, rtype, regnum);
item->usage = usage;
item->index = index;
item->writemask = writemask;
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item->misc = flags;
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} // add_attribute_register
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static inline void add_sampler(Context *ctx, const RegisterType rtype,
const int regnum, const TextureType ttype)
{
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// !!! FIXME: make sure it doesn't exist?
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RegisterList *item = reglist_insert(ctx, &ctx->samplers, rtype, regnum);
item->index = (int) ttype;
} // add_sampler
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static inline int writemask_xyzw(const int writemask)
{
return (writemask == 0xF); // 0xF == 1111. No explicit mask (full!).
} // writemask_xyzw
static inline int writemask_xyz(const int writemask)
{
return (writemask == 0x7); // 0x7 == 0111. (that is: xyz)
} // writemask_xyz
static inline int writemask_xy(const int writemask)
{
return (writemask == 0x3); // 0x3 == 0011. (that is: xy)
} // writemask_xy
static inline int writemask_x(const int writemask)
{
return (writemask == 0x1); // 0x1 == 0001. (that is: x)
} // writemask_x
static inline int writemask_y(const int writemask)
{
return (writemask == 0x2); // 0x1 == 0010. (that is: y)
} // writemask_y
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static inline int replicate_swizzle(const int swizzle)
{
return ( (((swizzle >> 0) & 0x3) == ((swizzle >> 2) & 0x3)) &&
(((swizzle >> 2) & 0x3) == ((swizzle >> 4) & 0x3)) &&
(((swizzle >> 4) & 0x3) == ((swizzle >> 6) & 0x3)) );
} // replicate_swizzle
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static inline int no_swizzle(const int swizzle)
{
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return (swizzle == 0xE4); // 0xE4 == 11100100 ... 0 1 2 3. No swizzle.
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} // no_swizzle
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static inline int vecsize_from_writemask(const int m)
{
return (m & 1) + ((m >> 1) & 1) + ((m >> 2) & 1) + ((m >> 3) & 1);
} // vecsize_from_writemask
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static int allocate_scratch_register(Context *ctx)
{
const int retval = ctx->scratch_registers++;
if (retval >= ctx->max_scratch_registers)
ctx->max_scratch_registers = retval + 1;
return retval;
} // allocate_scratch_register
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static int allocate_branch_label(Context *ctx)
705
{
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return ctx->assigned_branch_labels++;
} // allocate_branch_label
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// D3D stuff that's used in more than just the d3d profile...
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static const char swizzle_channels[] = { 'x', 'y', 'z', 'w' };
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static const char *usagestrs[] = {
"_position", "_blendweight", "_blendindices", "_normal", "_psize",
"_texcoord", "_tangent", "_binormal", "_tessfactor", "_positiont",
"_color", "_fog", "_depth", "_sample"
};
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static const char *get_D3D_register_string(Context *ctx,
722
RegisterType regtype,
723
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int regnum, char *regnum_str,
size_t regnum_size)
725
{
726
const char *retval = NULL;
727
int has_number = 1;
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switch (regtype)
730
{
731
case REG_TYPE_TEMP:
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retval = "r";
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break;
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case REG_TYPE_INPUT:
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retval = "v";
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break;
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case REG_TYPE_CONST:
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retval = "c";
break;
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case REG_TYPE_ADDRESS: // (or REG_TYPE_TEXTURE, same value.)
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retval = shader_is_vertex(ctx) ? "a" : "t";
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746
break;
747
case REG_TYPE_RASTOUT:
748
switch ((RastOutType) regnum)
749
{
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case RASTOUT_TYPE_POSITION: retval = "oPos"; break;
case RASTOUT_TYPE_FOG: retval = "oFog"; break;
case RASTOUT_TYPE_POINT_SIZE: retval = "oPts"; break;
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} // switch
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has_number = 0;
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break;
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case REG_TYPE_ATTROUT:
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retval = "oD";
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break;
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case REG_TYPE_OUTPUT: // (or REG_TYPE_TEXCRDOUT, same value.)
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if (shader_is_vertex(ctx) && shader_version_atleast(ctx, 3, 0))
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retval = "o";
764
else
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retval = "oT";
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break;
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case REG_TYPE_CONSTINT:
769
retval = "i";
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break;
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case REG_TYPE_COLOROUT:
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retval = "oC";
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break;
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case REG_TYPE_DEPTHOUT:
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retval = "oDepth";
778
has_number = 0;
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break;
781
case REG_TYPE_SAMPLER:
782
retval = "s";
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784
break;
785
case REG_TYPE_CONSTBOOL:
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retval = "b";
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788
break;
789
case REG_TYPE_LOOP:
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retval = "aL";
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has_number = 0;
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break;
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case REG_TYPE_MISCTYPE:
795
switch ((const MiscTypeType) regnum)
796
{
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case MISCTYPE_TYPE_POSITION: retval = "vPos"; break;
case MISCTYPE_TYPE_FACE: retval = "vFace"; break;
799
} // switch
800
has_number = 0;
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802
break;
803
case REG_TYPE_LABEL:
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retval = "l";
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806
break;
807
case REG_TYPE_PREDICATE:
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retval = "p";
809
break;
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815
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//case REG_TYPE_TEMPFLOAT16: // !!! FIXME: don't know this asm string
default:
fail(ctx, "unknown register type");
retval = "???";
has_number = 0;
break;
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} // switch
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if (has_number)
snprintf(regnum_str, regnum_size, "%u", (uint) regnum);
else
regnum_str[0] = '\0';
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return retval;
} // get_D3D_register_string
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831
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833
834
835
836
#define AT_LEAST_ONE_PROFILE 0
#if !SUPPORT_PROFILE_D3D
#define PROFILE_EMITTER_D3D(op)
#else
#undef AT_LEAST_ONE_PROFILE
#define AT_LEAST_ONE_PROFILE 1
#define PROFILE_EMITTER_D3D(op) emit_D3D_##op,
837
static const char *make_D3D_srcarg_string_in_buf(Context *ctx,
838
839
const SourceArgInfo *arg,
char *buf, size_t buflen)
840
841
842
{
const char *premod_str = "";
const char *postmod_str = "";
843
switch (arg->src_mod)
844
845
846
847
848
849
850
851
852
853
854
{
case SRCMOD_NEGATE:
premod_str = "-";
break;
case SRCMOD_BIASNEGATE:
premod_str = "-";
// fall through.
case SRCMOD_BIAS:
postmod_str = "_bias";
break;
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856
857
858
859
860
861
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863
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866
867
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869
870
871
872
873
874
875
876
877
878
879
880
881
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883
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887
888
889
890
891
case SRCMOD_SIGNNEGATE:
premod_str = "-";
// fall through.
case SRCMOD_SIGN:
postmod_str = "_bx2";
break;
case SRCMOD_COMPLEMENT:
premod_str = "1-";
break;
case SRCMOD_X2NEGATE:
premod_str = "-";
// fall through.
case SRCMOD_X2:
postmod_str = "_x2";
break;
case SRCMOD_DZ:
postmod_str = "_dz";
break;
case SRCMOD_DW:
postmod_str = "_dw";
break;
case SRCMOD_ABSNEGATE:
premod_str = "-";
// fall through.
case SRCMOD_ABS:
postmod_str = "_abs";
break;
case SRCMOD_NOT:
premod_str = "!";
break;
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893
894
895
case SRCMOD_NONE:
case SRCMOD_TOTAL:
break; // stop compiler whining.
896
897
898
899
} // switch
char regnum_str[16];
900
901
902
const char *regtype_str = get_D3D_register_string(ctx, arg->regtype,
arg->regnum, regnum_str,
sizeof (regnum_str));
903
904
905
906
if (regtype_str == NULL)
{
fail(ctx, "Unknown source register type.");
907
return "";
908
909
} // if
910
911
912
913
914
915
916
917
918
919
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921
922
923
924
925
926
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928
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930
931
932
933
const char *rel_lbracket = "";
const char *rel_rbracket = "";
char rel_swizzle[4] = { '\0' };
char rel_regnum_str[16] = { '\0' };
const char *rel_regtype_str = "";
if (arg->relative)
{
rel_swizzle[0] = '.';
rel_swizzle[1] = swizzle_channels[arg->relative_component];
rel_swizzle[2] = '\0';
rel_lbracket = "[";
rel_rbracket = "]";
rel_regtype_str = get_D3D_register_string(ctx, arg->relative_regtype,
arg->relative_regnum,
rel_regnum_str,
sizeof (rel_regnum_str));
if (regtype_str == NULL)
{
fail(ctx, "Unknown relative source register type.");
return "";
} // if
} // if
934
935
char swizzle_str[6];
int i = 0;
936
const int scalar = scalar_register(ctx->shader_type, arg->regtype, arg->regnum);
937
if (!scalar && !no_swizzle(arg->swizzle))
938
939
{
swizzle_str[i++] = '.';
940
941
942
943
swizzle_str[i++] = swizzle_channels[arg->swizzle_x];
swizzle_str[i++] = swizzle_channels[arg->swizzle_y];
swizzle_str[i++] = swizzle_channels[arg->swizzle_z];
swizzle_str[i++] = swizzle_channels[arg->swizzle_w];
944
945
946
947
// .xyzz is the same as .xyz, .z is the same as .zzzz, etc.
while (swizzle_str[i-1] == swizzle_str[i-2])
i--;
948
949
950
951
} // if
swizzle_str[i] = '\0';
assert(i < sizeof (swizzle_str));
952
// !!! FIXME: c12[a0.x] actually needs to be c[a0.x + 12]
953
954
955
956
snprintf(buf, buflen, "%s%s%s%s%s%s%s%s%s%s",
premod_str, regtype_str, regnum_str, postmod_str,
rel_lbracket, rel_regtype_str, rel_regnum_str, rel_swizzle,
rel_rbracket, swizzle_str);
957
// !!! FIXME: make sure the scratch buffer was large enough.
958
return buf;
959
} // make_D3D_srcarg_string_in_buf
960
961
962
static const char *make_D3D_destarg_string(Context *ctx)
963
{
964
const DestArgInfo *arg = &ctx->dest_arg;
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
const char *result_shift_str = "";
switch (arg->result_shift)
{
case 0x1: result_shift_str = "_x2"; break;
case 0x2: result_shift_str = "_x4"; break;
case 0x3: result_shift_str = "_x8"; break;
case 0xD: result_shift_str = "_d8"; break;
case 0xE: result_shift_str = "_d4"; break;
case 0xF: result_shift_str = "_d2"; break;
} // switch
const char *sat_str = (arg->result_mod & MOD_SATURATE) ? "_sat" : "";
const char *pp_str = (arg->result_mod & MOD_PP) ? "_pp" : "";
const char *cent_str = (arg->result_mod & MOD_CENTROID) ? "_centroid" : "";
char regnum_str[16];
const char *regtype_str = get_D3D_register_string(ctx, arg->regtype,
arg->regnum, regnum_str,
sizeof (regnum_str));
if (regtype_str == NULL)
{
fail(ctx, "Unknown destination register type.");
return "";
} // if
char writemask_str[6];
int i = 0;
993
const int scalar = scalar_register(ctx->shader_type, arg->regtype, arg->regnum);
994
if (!scalar && !writemask_xyzw(arg->writemask))
995
996
997
998
999
1000
{
writemask_str[i++] = '.';
if (arg->writemask0) writemask_str[i++] = 'x';
if (arg->writemask1) writemask_str[i++] = 'y';
if (arg->writemask2) writemask_str[i++] = 'z';
if (arg->writemask3) writemask_str[i++] = 'w';