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mojoshader.c
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/**
* MojoShader; generate shader programs from bytecode of compiled
* Direct3D shaders.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
// !!! FIXME: this file really needs to be split up.
// !!! FIXME: I keep changing coding styles for symbols and typedefs.
// !!! FIXME: rules from MSDN about temp registers we probably don't check.
// - There are limited temporaries: vs_1_1 has 12 (ps_1_1 has _2_!).
// - SM2 apparently was variable, between 12 and 32. Shader Model 3 has 32.
// - A maximum of three temp registers can be used in a single instruction.
#define __MOJOSHADER_INTERNAL__ 1
#include "profiles/mojoshader_profile.h"
// Deal with register lists... !!! FIXME: I sort of hate this.
static void free_reglist(MOJOSHADER_free f, void *d, RegisterList *item)
{
while (item != NULL)
{
RegisterList *next = item->next;
f(item, d);
item = next;
} // while
} // free_reglist
static inline const RegisterList *reglist_exists(RegisterList *prev,
const RegisterType regtype,
const int regnum)
{
return (reglist_find(prev, regtype, regnum));
} // reglist_exists
static inline int register_was_written(Context *ctx, const RegisterType rtype,
const int regnum)
{
RegisterList *reg = reglist_find(&ctx->used_registers, rtype, regnum);
return (reg && reg->written);
} // register_was_written
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
static void add_attribute_register(Context *ctx, const RegisterType rtype,
const int regnum, const MOJOSHADER_usage usage,
const int index, const int writemask, int flags)
{
RegisterList *item = reglist_insert(ctx, &ctx->attributes, rtype, regnum);
item->usage = usage;
item->index = index;
item->writemask = writemask;
item->misc = flags;
if ((rtype == REG_TYPE_OUTPUT) && (usage == MOJOSHADER_USAGE_POINTSIZE))
ctx->uses_pointsize = 1; // note that we have to check this later.
else if ((rtype == REG_TYPE_OUTPUT) && (usage == MOJOSHADER_USAGE_FOG))
ctx->uses_fog = 1; // note that we have to check this later.
} // add_attribute_register
static inline TextureType cvtMojoToD3DSamplerType(const MOJOSHADER_samplerType type)
{
return (TextureType) (((int) type) + 2);
} // cvtMojoToD3DSamplerType
static inline MOJOSHADER_samplerType cvtD3DToMojoSamplerType(const TextureType type)
{
return (MOJOSHADER_samplerType) (((int) type) - 2);
} // cvtD3DToMojoSamplerType
static inline void add_sampler(Context *ctx, const int regnum,
TextureType ttype, const int texbem)
{
const RegisterType rtype = REG_TYPE_SAMPLER;
// !!! FIXME: make sure it doesn't exist?
// !!! FIXME: (ps_1_1 assume we can add it multiple times...)
RegisterList *item = reglist_insert(ctx, &ctx->samplers, rtype, regnum);
if (ctx->samplermap != NULL)
{
unsigned int i;
for (i = 0; i < ctx->samplermap_count; i++)
{
if (ctx->samplermap[i].index == regnum)
{
ttype = cvtMojoToD3DSamplerType(ctx->samplermap[i].type);
break;
} // if
} // for
} // if
item->index = (int) ttype;
item->misc |= texbem;
} // add_sampler
static inline void adjust_token_position(Context *ctx, const int incr)
{
ctx->tokens += incr;
ctx->tokencount -= incr;
ctx->current_position += incr * sizeof (uint32);
} // adjust_token_position
// Generate emitter declarations for each profile with this macro...
#define PREDECLARE_PROFILE(prof) \
void emit_##prof##_start(Context *ctx, const char *profilestr); \
void emit_##prof##_end(Context *ctx); \
void emit_##prof##_phase(Context *ctx); \
void emit_##prof##_finalize(Context *ctx); \
void emit_##prof##_global(Context *ctx, RegisterType regtype, int regnum);\
void emit_##prof##_array(Context *ctx, VariableList *var); \
void emit_##prof##_const_array(Context *ctx, const ConstantsList *clist, \
int base, int size); \
void emit_##prof##_uniform(Context *ctx, RegisterType regtype, int regnum,\
const VariableList *var); \
void emit_##prof##_sampler(Context *ctx, int stage, TextureType ttype, \
int tb); \
void emit_##prof##_attribute(Context *ctx, RegisterType regtype, \
int regnum, MOJOSHADER_usage usage, \
int index, int wmask, int flags); \
void emit_##prof##_NOP(Context *ctx); \
void emit_##prof##_MOV(Context *ctx); \
void emit_##prof##_ADD(Context *ctx); \
void emit_##prof##_SUB(Context *ctx); \
void emit_##prof##_MAD(Context *ctx); \
void emit_##prof##_MUL(Context *ctx); \
void emit_##prof##_RCP(Context *ctx); \
void emit_##prof##_RSQ(Context *ctx); \
void emit_##prof##_DP3(Context *ctx); \
void emit_##prof##_DP4(Context *ctx); \
void emit_##prof##_MIN(Context *ctx); \
void emit_##prof##_MAX(Context *ctx); \
void emit_##prof##_SLT(Context *ctx); \
void emit_##prof##_SGE(Context *ctx); \
void emit_##prof##_EXP(Context *ctx); \
void emit_##prof##_LOG(Context *ctx); \
void emit_##prof##_LIT(Context *ctx); \
void emit_##prof##_DST(Context *ctx); \
void emit_##prof##_LRP(Context *ctx); \
void emit_##prof##_FRC(Context *ctx); \
void emit_##prof##_M4X4(Context *ctx); \
void emit_##prof##_M4X3(Context *ctx); \
void emit_##prof##_M3X4(Context *ctx); \
void emit_##prof##_M3X3(Context *ctx); \
void emit_##prof##_M3X2(Context *ctx); \
void emit_##prof##_CALL(Context *ctx); \
void emit_##prof##_CALLNZ(Context *ctx); \
void emit_##prof##_LOOP(Context *ctx); \
void emit_##prof##_ENDLOOP(Context *ctx); \
void emit_##prof##_LABEL(Context *ctx); \
void emit_##prof##_DCL(Context *ctx); \
void emit_##prof##_POW(Context *ctx); \
void emit_##prof##_CRS(Context *ctx); \
void emit_##prof##_SGN(Context *ctx); \
void emit_##prof##_ABS(Context *ctx); \
void emit_##prof##_NRM(Context *ctx); \
void emit_##prof##_SINCOS(Context *ctx); \
void emit_##prof##_REP(Context *ctx); \
void emit_##prof##_ENDREP(Context *ctx); \
void emit_##prof##_IF(Context *ctx); \
void emit_##prof##_IFC(Context *ctx); \
void emit_##prof##_ELSE(Context *ctx); \
void emit_##prof##_ENDIF(Context *ctx); \
void emit_##prof##_BREAK(Context *ctx); \
void emit_##prof##_BREAKC(Context *ctx); \
void emit_##prof##_MOVA(Context *ctx); \
void emit_##prof##_DEFB(Context *ctx); \
void emit_##prof##_DEFI(Context *ctx); \
void emit_##prof##_TEXCRD(Context *ctx); \
void emit_##prof##_TEXKILL(Context *ctx); \
void emit_##prof##_TEXLD(Context *ctx); \
void emit_##prof##_TEXBEM(Context *ctx); \
void emit_##prof##_TEXBEML(Context *ctx); \
void emit_##prof##_TEXREG2AR(Context *ctx); \
void emit_##prof##_TEXREG2GB(Context *ctx); \
void emit_##prof##_TEXM3X2PAD(Context *ctx); \
void emit_##prof##_TEXM3X2TEX(Context *ctx); \
void emit_##prof##_TEXM3X3PAD(Context *ctx); \
void emit_##prof##_TEXM3X3TEX(Context *ctx); \
void emit_##prof##_TEXM3X3SPEC(Context *ctx); \
void emit_##prof##_TEXM3X3VSPEC(Context *ctx); \
void emit_##prof##_EXPP(Context *ctx); \
void emit_##prof##_LOGP(Context *ctx); \
void emit_##prof##_CND(Context *ctx); \
void emit_##prof##_DEF(Context *ctx); \
void emit_##prof##_TEXREG2RGB(Context *ctx); \
void emit_##prof##_TEXDP3TEX(Context *ctx); \
void emit_##prof##_TEXM3X2DEPTH(Context *ctx); \
void emit_##prof##_TEXDP3(Context *ctx); \
void emit_##prof##_TEXM3X3(Context *ctx); \
void emit_##prof##_TEXDEPTH(Context *ctx); \
void emit_##prof##_CMP(Context *ctx); \
void emit_##prof##_BEM(Context *ctx); \
void emit_##prof##_DP2ADD(Context *ctx); \
void emit_##prof##_DSX(Context *ctx); \
void emit_##prof##_DSY(Context *ctx); \
void emit_##prof##_TEXLDD(Context *ctx); \
void emit_##prof##_SETP(Context *ctx); \
void emit_##prof##_TEXLDL(Context *ctx); \
void emit_##prof##_BREAKP(Context *ctx); \
void emit_##prof##_RESERVED(Context *ctx); \
void emit_##prof##_RET(Context *ctx); \
const char *get_##prof##_varname(Context *ctx, RegisterType rt, \
int regnum); \
const char *get_##prof##_const_array_varname(Context *ctx, \
int base, int size);
// Check for profile support...
#define AT_LEAST_ONE_PROFILE 0
#if !SUPPORT_PROFILE_BYTECODE
#define PROFILE_EMITTER_BYTECODE(op)
#else
#undef AT_LEAST_ONE_PROFILE
#define AT_LEAST_ONE_PROFILE 1
#define PROFILE_EMITTER_BYTECODE(op) emit_BYTECODE_##op,
PREDECLARE_PROFILE(BYTECODE)
#endif
#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,
PREDECLARE_PROFILE(D3D)
#endif
#if !SUPPORT_PROFILE_HLSL
#define PROFILE_EMITTER_HLSL(op)
#else
#undef AT_LEAST_ONE_PROFILE
#define AT_LEAST_ONE_PROFILE 1
#define PROFILE_EMITTER_HLSL(op) emit_HLSL_##op,
PREDECLARE_PROFILE(HLSL)
#endif
#if !SUPPORT_PROFILE_GLSL
#define PROFILE_EMITTER_GLSL(op)
#else
#undef AT_LEAST_ONE_PROFILE
#define AT_LEAST_ONE_PROFILE 1
#define PROFILE_EMITTER_GLSL(op) emit_GLSL_##op,
PREDECLARE_PROFILE(GLSL)
#endif
#if !SUPPORT_PROFILE_METAL
#define PROFILE_EMITTER_METAL(op)
#else
#undef AT_LEAST_ONE_PROFILE
#define AT_LEAST_ONE_PROFILE 1
#define PROFILE_EMITTER_METAL(op) emit_METAL_##op,
PREDECLARE_PROFILE(METAL)
#endif
#if !SUPPORT_PROFILE_ARB1
#define PROFILE_EMITTER_ARB1(op)
#else
#undef AT_LEAST_ONE_PROFILE
#define AT_LEAST_ONE_PROFILE 1
#define PROFILE_EMITTER_ARB1(op) emit_ARB1_##op,
PREDECLARE_PROFILE(ARB1)
#endif
#if !SUPPORT_PROFILE_SPIRV
#define PROFILE_EMITTER_SPIRV(op)
#else
#undef AT_LEAST_ONE_PROFILE
#define AT_LEAST_ONE_PROFILE 1
#define PROFILE_EMITTER_SPIRV(op) emit_SPIRV_##op,
PREDECLARE_PROFILE(SPIRV)
#endif
#if !AT_LEAST_ONE_PROFILE
#error No profiles are supported. Fix your build.
#endif
#define DEFINE_PROFILE(prof) { \
MOJOSHADER_PROFILE_##prof, \
emit_##prof##_start, \
emit_##prof##_end, \
emit_##prof##_phase, \
emit_##prof##_global, \
emit_##prof##_array, \
emit_##prof##_const_array, \
emit_##prof##_uniform, \
emit_##prof##_sampler, \
emit_##prof##_attribute, \
emit_##prof##_finalize, \
get_##prof##_varname, \
get_##prof##_const_array_varname, \
},
static const Profile profiles[] =
{
#if SUPPORT_PROFILE_D3D
DEFINE_PROFILE(D3D)
#endif
#if SUPPORT_PROFILE_BYTECODE
DEFINE_PROFILE(BYTECODE)
#endif
#if SUPPORT_PROFILE_HLSL
DEFINE_PROFILE(HLSL)
#endif
#if SUPPORT_PROFILE_GLSL
DEFINE_PROFILE(GLSL)
#endif
#if SUPPORT_PROFILE_ARB1
DEFINE_PROFILE(ARB1)
#endif
#if SUPPORT_PROFILE_METAL
DEFINE_PROFILE(METAL)
#endif
#if SUPPORT_PROFILE_SPIRV
DEFINE_PROFILE(SPIRV)
#endif
};
#undef DEFINE_PROFILE
// This is for profiles that extend other profiles...
static const struct { const char *from; const char *to; } profileMap[] =
{
{ MOJOSHADER_PROFILE_GLSPIRV, MOJOSHADER_PROFILE_SPIRV },
{ MOJOSHADER_PROFILE_GLSLES, MOJOSHADER_PROFILE_GLSL },
{ MOJOSHADER_PROFILE_GLSLES3, MOJOSHADER_PROFILE_GLSL },
{ MOJOSHADER_PROFILE_GLSL120, MOJOSHADER_PROFILE_GLSL },
{ MOJOSHADER_PROFILE_NV2, MOJOSHADER_PROFILE_ARB1 },
{ MOJOSHADER_PROFILE_NV3, MOJOSHADER_PROFILE_ARB1 },
{ MOJOSHADER_PROFILE_NV4, MOJOSHADER_PROFILE_ARB1 },
};
// The PROFILE_EMITTER_* items MUST be in the same order as profiles[]!
#define PROFILE_EMITTERS(op) { \
PROFILE_EMITTER_D3D(op) \
PROFILE_EMITTER_BYTECODE(op) \
PROFILE_EMITTER_HLSL(op) \
PROFILE_EMITTER_GLSL(op) \
PROFILE_EMITTER_ARB1(op) \
PROFILE_EMITTER_METAL(op) \
PROFILE_EMITTER_SPIRV(op) \
}
static int parse_destination_token(Context *ctx, DestArgInfo *info)
{
// !!! FIXME: recheck against the spec for ranges (like RASTOUT values, etc).
if (ctx->tokencount == 0)
{
fail(ctx, "Out of tokens in destination parameter");
return 0;
} // if
const uint32 token = SWAP32(*(ctx->tokens));
const int reserved1 = (int) ((token >> 14) & 0x3); // bits 14 through 15
const int reserved2 = (int) ((token >> 31) & 0x1); // bit 31
info->token = ctx->tokens;
info->regnum = (int) (token & 0x7ff); // bits 0 through 10
info->relative = (int) ((token >> 13) & 0x1); // bit 13
info->orig_writemask = (int) ((token >> 16) & 0xF); // bits 16 through 19
info->result_mod = (int) ((token >> 20) & 0xF); // bits 20 through 23
info->result_shift = (int) ((token >> 24) & 0xF); // bits 24 through 27 abc
info->regtype = (RegisterType) (((token >> 28) & 0x7) | ((token >> 8) & 0x18)); // bits 28-30, 11-12
int writemask;
if (isscalar(ctx, ctx->shader_type, info->regtype, info->regnum))
writemask = 0x1; // just x.
else
writemask = info->orig_writemask;
set_dstarg_writemask(info, writemask); // bits 16 through 19.
// all the REG_TYPE_CONSTx types are the same register type, it's just
// split up so its regnum can be > 2047 in the bytecode. Clean it up.
if (info->regtype == REG_TYPE_CONST2)
{
info->regtype = REG_TYPE_CONST;
info->regnum += 2048;
} // else if
else if (info->regtype == REG_TYPE_CONST3)
{
info->regtype = REG_TYPE_CONST;
info->regnum += 4096;
} // else if
else if (info->regtype == REG_TYPE_CONST4)
{
info->regtype = REG_TYPE_CONST;
info->regnum += 6144;
} // else if
// swallow token for now, for multiple calls in a row.
adjust_token_position(ctx, 1);
if (reserved1 != 0x0)
fail(ctx, "Reserved bit #1 in destination token must be zero");
if (reserved2 != 0x1)
fail(ctx, "Reserved bit #2 in destination token must be one");
if (info->relative)
{
if (!shader_is_vertex(ctx))
fail(ctx, "Relative addressing in non-vertex shader");
if (!shader_version_atleast(ctx, 3, 0))
fail(ctx, "Relative addressing in vertex shader version < 3.0");
if ((!ctx->ctab.have_ctab) && (!ctx->ignores_ctab))
{
// it's hard to do this efficiently without!
fail(ctx, "relative addressing unsupported without a CTAB");
} // if
// !!! FIXME: I don't have a shader that has a relative dest currently.
fail(ctx, "Relative addressing of dest tokens is unsupported");
return 2;
} // if
const int s = info->result_shift;
if (s != 0)
{
if (!shader_is_pixel(ctx))
fail(ctx, "Result shift scale in non-pixel shader");
if (shader_version_atleast(ctx, 2, 0))
fail(ctx, "Result shift scale in pixel shader version >= 2.0");
if ( ! (((s >= 1) && (s <= 3)) || ((s >= 0xD) && (s <= 0xF))) )
fail(ctx, "Result shift scale isn't 1 to 3, or 13 to 15.");
} // if
if (info->result_mod & MOD_PP) // Partial precision (pixel shaders only)
{
if (!shader_is_pixel(ctx))
fail(ctx, "Partial precision result mod in non-pixel shader");
} // if
if (info->result_mod & MOD_CENTROID) // Centroid (pixel shaders only)
{
if (!shader_is_pixel(ctx))
fail(ctx, "Centroid result mod in non-pixel shader");
else if (!ctx->centroid_allowed) // only on DCL opcodes!
fail(ctx, "Centroid modifier not allowed here");
} // if
if (/*(info->regtype < 0) ||*/ (info->regtype > REG_TYPE_MAX))
fail(ctx, "Register type is out of range");
if (!isfail(ctx))
set_used_register(ctx, info->regtype, info->regnum, 1);
return 1;
} // parse_destination_token
static void determine_constants_arrays(Context *ctx)
{
// Only process this stuff once. This is called after all DEF* opcodes
// could have been parsed.
if (ctx->determined_constants_arrays)
return;
ctx->determined_constants_arrays = 1;
if (ctx->constant_count <= 1)
return; // nothing to sort or group.
// Sort the linked list into an array for easier tapdancing...
ConstantsList **array = (ConstantsList **) alloca(sizeof (ConstantsList *) * (ctx->constant_count + 1));
ConstantsList *item = ctx->constants;
int i;
for (i = 0; i < ctx->constant_count; i++)
{
if (item == NULL)
{
fail(ctx, "BUG: mismatched constant list and count");
return;
} // if
array[i] = item;
item = item->next;
} // for
array[ctx->constant_count] = NULL;
// bubble sort ftw.
int sorted;
do
{
sorted = 1;
for (i = 0; i < ctx->constant_count-1; i++)
{
if (array[i]->constant.index > array[i+1]->constant.index)
{
ConstantsList *tmp = array[i];
array[i] = array[i+1];
array[i+1] = tmp;
sorted = 0;
} // if
} // for
} while (!sorted);
// okay, sorted. While we're here, let's redo the linked list in order...
for (i = 0; i < ctx->constant_count; i++)
array[i]->next = array[i+1];
ctx->constants = array[0];
// now figure out the groupings of constants and add to ctx->variables...
int start = -1;
int prev = -1;
int count = 0;
const int hi = ctx->constant_count;
for (i = 0; i <= hi; i++)
{
if (array[i] && (array[i]->constant.type != MOJOSHADER_UNIFORM_FLOAT))
continue; // we only care about REG_TYPE_CONST for array groups.
if (start == -1)
{
prev = start = i; // first REG_TYPE_CONST we've seen. Mark it!
continue;
} // if
// not a match (or last item in the array)...see if we had a
// contiguous set before this point...
if ( (array[i]) && (array[i]->constant.index == (array[prev]->constant.index + 1)) )
count++;
else
{
if (count > 0) // multiple constants in the set?
{
VariableList *var;
var = (VariableList *) Malloc(ctx, sizeof (VariableList));
if (var == NULL)
break;
var->type = MOJOSHADER_UNIFORM_FLOAT;
var->index = array[start]->constant.index;
var->count = (array[prev]->constant.index - var->index) + 1;
var->constant = array[start];
var->used = 0;
var->emit_position = -1;
var->next = ctx->variables;
ctx->variables = var;
} // if
start = i; // set this as new start of sequence.
} // if
prev = i;
} // for
} // determine_constants_arrays
static void shader_model_1_input_usage(const int regnum, MOJOSHADER_usage *usage, int *index)
{
*index = 0;
switch (regnum) // these are hardcoded for Shader Model 1: v0 is POSITION, v1 is BLENDWEIGHT, etc.
{
case 0: *usage = MOJOSHADER_USAGE_POSITION; break;
case 1: *usage = MOJOSHADER_USAGE_BLENDWEIGHT; break;
case 2: *usage = MOJOSHADER_USAGE_BLENDINDICES; break;
case 3: *usage = MOJOSHADER_USAGE_NORMAL; break;
case 4: *usage = MOJOSHADER_USAGE_POINTSIZE; break;
case 5: *usage = MOJOSHADER_USAGE_COLOR; break; // diffuse
case 6: *usage = MOJOSHADER_USAGE_COLOR; *index = 1; break; // specular
case 7: *usage = MOJOSHADER_USAGE_TEXCOORD; break;
case 8: *usage = MOJOSHADER_USAGE_TEXCOORD; *index = 1; break;
case 9: *usage = MOJOSHADER_USAGE_TEXCOORD; *index = 2; break;
case 10: *usage = MOJOSHADER_USAGE_TEXCOORD; *index = 3; break;
case 11: *usage = MOJOSHADER_USAGE_TEXCOORD; *index = 4; break;
case 12: *usage = MOJOSHADER_USAGE_TEXCOORD; *index = 5; break;
case 13: *usage = MOJOSHADER_USAGE_TEXCOORD; *index = 6; break;
case 14: *usage = MOJOSHADER_USAGE_TEXCOORD; *index = 7; break;
case 15: *usage = MOJOSHADER_USAGE_POSITION; *index = 1; break;
case 16: *usage = MOJOSHADER_USAGE_NORMAL; *index = 1; break;
default: *usage = MOJOSHADER_USAGE_UNKNOWN; break;
} // switch
} // shader_model_1_input_usage
static int adjust_swizzle(const Context *ctx, const RegisterType regtype,
const int regnum, const int swizzle)
{
if (regtype != REG_TYPE_INPUT) // !!! FIXME: maybe lift this later?
return swizzle;
else if (ctx->swizzles_count == 0)
return swizzle;
MOJOSHADER_usage usage = MOJOSHADER_USAGE_UNKNOWN;
int index = 0;
// Shader Model 1 didn't have to predeclare attribute variables, so
// reglist_find won't be able to look them up at this point, but
// their usages don't change.
if (!shader_version_atleast(ctx, 2, 0))
shader_model_1_input_usage(regnum, &usage, &index);
else
{
const RegisterList *reg = reglist_find(&ctx->attributes, regtype, regnum);
if (reg == NULL)
return swizzle;
usage = reg->usage;
index = reg->index;
} // else
if (usage == MOJOSHADER_USAGE_UNKNOWN)
return swizzle;
size_t i;
for (i = 0; i < ctx->swizzles_count; i++)
{
const MOJOSHADER_swizzle *swiz = &ctx->swizzles[i];
if ((swiz->usage == usage) && (swiz->index == index))
{
return ( (((int)(swiz->swizzles[((swizzle >> 0) & 0x3)])) << 0) |
(((int)(swiz->swizzles[((swizzle >> 2) & 0x3)])) << 2) |
(((int)(swiz->swizzles[((swizzle >> 4) & 0x3)])) << 4) |
(((int)(swiz->swizzles[((swizzle >> 6) & 0x3)])) << 6) );
} // if
} // for
return swizzle;
} // adjust_swizzle
static int parse_source_token(Context *ctx, SourceArgInfo *info)
{
int retval = 1;
if (ctx->tokencount == 0)
{
fail(ctx, "Out of tokens in source parameter");
return 0;
} // if
const uint32 token = SWAP32(*(ctx->tokens));
const int reserved1 = (int) ((token >> 14) & 0x3); // bits 14 through 15
const int reserved2 = (int) ((token >> 31) & 0x1); // bit 31
info->token = ctx->tokens;
info->regnum = (int) (token & 0x7ff); // bits 0 through 10
info->relative = (int) ((token >> 13) & 0x1); // bit 13
const int swizzle = (int) ((token >> 16) & 0xFF); // bits 16 through 23
info->src_mod = (SourceMod) ((token >> 24) & 0xF); // bits 24 through 27
info->regtype = (RegisterType) (((token >> 28) & 0x7) | ((token >> 8) & 0x18)); // bits 28-30, 11-12
// all the REG_TYPE_CONSTx types are the same register type, it's just
// split up so its regnum can be > 2047 in the bytecode. Clean it up.
if (info->regtype == REG_TYPE_CONST2)
{
info->regtype = REG_TYPE_CONST;
info->regnum += 2048;
} // else if
else if (info->regtype == REG_TYPE_CONST3)
{
info->regtype = REG_TYPE_CONST;
info->regnum += 4096;
} // else if
else if (info->regtype == REG_TYPE_CONST4)
{
info->regtype = REG_TYPE_CONST;
info->regnum += 6144;
} // else if
info->swizzle = adjust_swizzle(ctx, info->regtype, info->regnum, swizzle);
info->swizzle_x = ((info->swizzle >> 0) & 0x3);
info->swizzle_y = ((info->swizzle >> 2) & 0x3);
info->swizzle_z = ((info->swizzle >> 4) & 0x3);
info->swizzle_w = ((info->swizzle >> 6) & 0x3);
// swallow token for now, for multiple calls in a row.
adjust_token_position(ctx, 1);
if (reserved1 != 0x0)
fail(ctx, "Reserved bits #1 in source token must be zero");
if (reserved2 != 0x1)
fail(ctx, "Reserved bit #2 in source token must be one");
if ((info->relative) && (ctx->tokencount == 0))
{
fail(ctx, "Out of tokens in relative source parameter");
info->relative = 0; // don't try to process it.
} // if
if (info->relative)
{
if ( (shader_is_pixel(ctx)) && (!shader_version_atleast(ctx, 3, 0)) )
fail(ctx, "Relative addressing in pixel shader version < 3.0");
// Shader Model 1 doesn't have an extra token to specify the
// relative register: it's always a0.x.
if (!shader_version_atleast(ctx, 2, 0))
{
info->relative_regnum = 0;
info->relative_regtype = REG_TYPE_ADDRESS;
info->relative_component = 0;
} // if
else // Shader Model 2 and later...
{
const uint32 reltoken = SWAP32(*(ctx->tokens));
// swallow token for now, for multiple calls in a row.
adjust_token_position(ctx, 1);
const int relswiz = (int) ((reltoken >> 16) & 0xFF);
info->relative_regnum = (int) (reltoken & 0x7ff);
info->relative_regtype = (RegisterType)
(((reltoken >> 28) & 0x7) |
((reltoken >> 8) & 0x18));
if (((reltoken >> 31) & 0x1) == 0)
fail(ctx, "bit #31 in relative address must be set");
if ((reltoken & 0xF00E000) != 0) // usused bits.
fail(ctx, "relative address reserved bit must be zero");
switch (info->relative_regtype)
{
case REG_TYPE_LOOP:
case REG_TYPE_ADDRESS:
break;
default:
fail(ctx, "invalid register for relative address");
break;
} // switch
if (info->relative_regnum != 0) // true for now.
fail(ctx, "invalid register for relative address");
if ( (info->relative_regtype != REG_TYPE_LOOP) && !replicate_swizzle(relswiz) )
fail(ctx, "relative address needs replicate swizzle");
info->relative_component = (relswiz & 0x3);
retval++;
} // else
if (info->regtype == REG_TYPE_INPUT)
{
if ( (shader_is_pixel(ctx)) || (!shader_version_atleast(ctx, 3, 0)) )
fail(ctx, "relative addressing of input registers not supported in this shader model");
ctx->have_relative_input_registers = 1;
} // if
else if (info->regtype == REG_TYPE_CONST)
{
// figure out what array we're in...
if (!ctx->ignores_ctab)
{
if (!ctx->ctab.have_ctab) // hard to do efficiently without!
fail(ctx, "relative addressing unsupported without a CTAB");
else
{
determine_constants_arrays(ctx);
VariableList *var;
const int reltarget = info->regnum;
for (var = ctx->variables; var != NULL; var = var->next)
{
const int lo = var->index;
if ( (reltarget >= lo) && (reltarget < (lo + var->count)) )
break; // match!
} // for
if (var == NULL)
fail(ctx, "relative addressing of indeterminate array");
else
{
var->used = 1;
info->relative_array = var;
set_used_register(ctx, info->relative_regtype, info->relative_regnum, 0);
} // else
} // else
} // if
} // else if
else
{
fail(ctx, "relative addressing of invalid register");
} // else
} // if
switch (info->src_mod)
{
case SRCMOD_NONE:
case SRCMOD_ABSNEGATE:
case SRCMOD_ABS:
case SRCMOD_NEGATE:
break; // okay in any shader model.
// apparently these are only legal in Shader Model 1.x ...
case SRCMOD_BIASNEGATE:
case SRCMOD_BIAS:
case SRCMOD_SIGNNEGATE:
case SRCMOD_SIGN:
case SRCMOD_COMPLEMENT:
case SRCMOD_X2NEGATE:
case SRCMOD_X2:
case SRCMOD_DZ:
case SRCMOD_DW:
if (shader_version_atleast(ctx, 2, 0))
fail(ctx, "illegal source mod for this Shader Model.");
break;
case SRCMOD_NOT: // !!! FIXME: I _think_ this is right...
if (shader_version_atleast(ctx, 2, 0))
{
if (info->regtype != REG_TYPE_PREDICATE
&& info->regtype != REG_TYPE_CONSTBOOL)
fail(ctx, "NOT only allowed on bool registers.");
} // if
break;
default:
fail(ctx, "Unknown source modifier");
} // switch
// !!! FIXME: docs say this for sm3 ... check these!
// "The negate modifier cannot be used on second source register of these
// instructions: m3x2 - ps, m3x3 - ps, m3x4 - ps, m4x3 - ps, and
// m4x4 - ps."
// "If any version 3 shader reads from one or more constant float
// registers (c#), one of the following must be true.
// All of the constant floating-point registers must use the abs modifier.
// None of the constant floating-point registers can use the abs modifier.
if (!isfail(ctx))
{
RegisterList *reg;
reg = set_used_register(ctx, info->regtype, info->regnum, 0);
// !!! FIXME: this test passes if you write to the register
// !!! FIXME: in this same instruction, because we parse the
// !!! FIXME: destination token first.
// !!! FIXME: Microsoft's shader validation explicitly checks temp
// !!! FIXME: registers for this...do they check other writable ones?
if ((info->regtype == REG_TYPE_TEMP) && (reg) && (!reg->written))
failf(ctx, "Temp register r%d used uninitialized", info->regnum);
} // if
return retval;
} // parse_source_token
static int parse_predicated_token(Context *ctx)
{
SourceArgInfo *arg = &ctx->predicate_arg;
parse_source_token(ctx, arg);
if (arg->regtype != REG_TYPE_PREDICATE)
fail(ctx, "Predicated instruction but not predicate register!");
if ((arg->src_mod != SRCMOD_NONE) && (arg->src_mod != SRCMOD_NOT))
fail(ctx, "Predicated instruction register is not NONE or NOT");
if ( !no_swizzle(arg->swizzle) && !replicate_swizzle(arg->swizzle) )
fail(ctx, "Predicated instruction register has wrong swizzle");
if (arg->relative) // I'm pretty sure this is illegal...?
fail(ctx, "relative addressing in predicated token");
return 1;
} // parse_predicated_token
static int parse_args_NULL(Context *ctx)
{
return 1;
} // parse_args_NULL
static int parse_args_DEF(Context *ctx)
{
parse_destination_token(ctx, &ctx->dest_arg);
if (ctx->dest_arg.regtype != REG_TYPE_CONST)
fail(ctx, "DEF using non-CONST register");
if (ctx->dest_arg.relative) // I'm pretty sure this is illegal...?
fail(ctx, "relative addressing in DEF");
ctx->dwords[0] = SWAP32(ctx->tokens[0]);
ctx->dwords[1] = SWAP32(ctx->tokens[1]);
ctx->dwords[2] = SWAP32(ctx->tokens[2]);
ctx->dwords[3] = SWAP32(ctx->tokens[3]);
return 6;
} // parse_args_DEF
static int parse_args_DEFI(Context *ctx)
{
parse_destination_token(ctx, &ctx->dest_arg);
if (ctx->dest_arg.regtype != REG_TYPE_CONSTINT)
fail(ctx, "DEFI using non-CONSTING register");
if (ctx->dest_arg.relative) // I'm pretty sure this is illegal...?
fail(ctx, "relative addressing in DEFI");
ctx->dwords[0] = SWAP32(ctx->tokens[0]);
ctx->dwords[1] = SWAP32(ctx->tokens[1]);
ctx->dwords[2] = SWAP32(ctx->tokens[2]);
ctx->dwords[3] = SWAP32(ctx->tokens[3]);
return 6;
} // parse_args_DEFI
static int parse_args_DEFB(Context *ctx)
{
parse_destination_token(ctx, &ctx->dest_arg);
if (ctx->dest_arg.regtype != REG_TYPE_CONSTBOOL)
fail(ctx, "DEFB using non-CONSTBOOL register");
if (ctx->dest_arg.relative) // I'm pretty sure this is illegal...?
fail(ctx, "relative addressing in DEFB");
ctx->dwords[0] = *(ctx->tokens) ? 1 : 0;
return 3;
} // parse_args_DEFB
static int valid_texture_type(const uint32 ttype)
{
switch ((const TextureType) ttype)
{
case TEXTURE_TYPE_2D:
case TEXTURE_TYPE_CUBE:
case TEXTURE_TYPE_VOLUME:
return 1; // it's okay.
} // switch
return 0;
} // valid_texture_type
// !!! FIXME: this function is kind of a mess.
static int parse_args_DCL(Context *ctx)
{
int unsupported = 0;
const uint32 token = SWAP32(*(ctx->tokens));
const int reserved1 = (int) ((token >> 31) & 0x1); // bit 31
uint32 reserved_mask = 0x00000000;
if (reserved1 != 0x1)
fail(ctx, "Bit #31 in DCL token must be one");
ctx->centroid_allowed = 1;
adjust_token_position(ctx, 1);
parse_destination_token(ctx, &ctx->dest_arg);
ctx->centroid_allowed = 0;
if (ctx->dest_arg.result_shift != 0) // I'm pretty sure this is illegal...?
fail(ctx, "shift scale in DCL");
if (ctx->dest_arg.relative) // I'm pretty sure this is illegal...?
fail(ctx, "relative addressing in DCL");
const RegisterType regtype = ctx->dest_arg.regtype;
const int regnum = ctx->dest_arg.regnum;
if ( (shader_is_pixel(ctx)) && (shader_version_atleast(ctx, 3, 0)) )
{
if (regtype == REG_TYPE_INPUT)
{
const uint32 usage = (token & 0xF);
const uint32 index = ((token >> 16) & 0xF);
reserved_mask = 0x7FF0FFE0;
ctx->dwords[0] = usage;
ctx->dwords[1] = index;
} // if
else if (regtype == REG_TYPE_MISCTYPE)
{
const MiscTypeType mt = (MiscTypeType) regnum;
if (mt == MISCTYPE_TYPE_POSITION)
reserved_mask = 0x7FFFFFFF;
else if (mt == MISCTYPE_TYPE_FACE)
{
reserved_mask = 0x7FFFFFFF;
if (!writemask_xyzw(ctx->dest_arg.orig_writemask))
fail(ctx, "DCL face writemask must be full");
if (ctx->dest_arg.result_mod != 0)
fail(ctx, "DCL face result modifier must be zero");
if (ctx->dest_arg.result_shift != 0)
fail(ctx, "DCL face shift scale must be zero");
} // else if
else
{
unsupported = 1;
} // else
ctx->dwords[0] = (uint32) MOJOSHADER_USAGE_UNKNOWN;
ctx->dwords[1] = 0;
} // else if
else if (regtype == REG_TYPE_TEXTURE)
{
const uint32 usage = (token & 0xF);
const uint32 index = ((token >> 16) & 0xF);
if (usage == MOJOSHADER_USAGE_TEXCOORD)
{
if (index > 7)
fail(ctx, "DCL texcoord usage must have 0-7 index");
} // if