Control - Implemented all basic opcodes

+ memory access
+ flow control
+ FPU ops
This commit is contained in:
Emmanuel BENOîT 2017-11-14 12:49:59 +01:00
parent 8b7964632a
commit 512c981402
2 changed files with 381 additions and 13 deletions

View file

@ -112,6 +112,10 @@ union T_OpValue
int32_t i;
uint32_t u;
float f;
constexpr T_OpValue( ) : i{ 0 } {}
constexpr T_OpValue( uint32_t u ) : u{ u } {}
constexpr T_OpValue( float f ) : f{ f } {}
};
struct T_OpProgram
@ -136,18 +140,49 @@ struct T_OpProgram
};
using P_OpProgram = T_OwnPtr< T_OpProgram >;
class T_Compiler : public A_PrivateImplementation
{
public:
T_Compiler( ) noexcept;
P_OpProgram compile(
opast::T_ParserOutput const& input ) noexcept;
};
struct T_OpContext
{
T_OpProgram& program; // The program
uint32_t instrPtr; // Instruction pointer
bool aborted; // Did the program fail?
bool aborted{ false }; // Did the program fail?
T_Array< T_OpValue > values; // VM data
T_Array< T_OpValue > stack; // Main VM stack
T_OpValue wreg; // Work register
double x87stack[ 8 ]; // x87 FPU emulation stack
int x87sp; // x87 FPU emulation stack pointer
uint32_t x87sp; // x87 FPU emulation stack pointer
enum E_RunTarget {
R_INIT ,
R_RENDER
};
explicit T_OpContext( T_OpProgram& program ) noexcept;
void run( E_RunTarget target ,
float time ,
float width ,
float height );
private:
void ensureStack( T_Op const& op ,
uint32_t min );
void ensureFpuStack( T_Op const& op ,
uint32_t minStacked ,
uint32_t minFree );
void checkAddress( T_Op const& op ,
uint32_t address );
};
class X_OpFailure : public std::exception
@ -157,7 +192,8 @@ class X_OpFailure : public std::exception
DEF_COPY( X_OpFailure );
DEF_MOVE( X_OpFailure );
X_OpFailure( T_Op const& op ,
X_OpFailure(
T_Op const& op ,
T_String error ) noexcept;
T_Op const& op( ) const noexcept
@ -173,15 +209,6 @@ class X_OpFailure : public std::exception
T_String fullMessage_;
};
class T_Compiler : public A_PrivateImplementation
{
public:
T_Compiler( ) noexcept;
P_OpProgram compile(
opast::T_ParserOutput const& input ) noexcept;
};
} // namespace ops

343
ops.cc
View file

@ -91,7 +91,7 @@ static T_KeyValueTable< E_OpType , T_OpInfo > OpInfoTable_{ ([]() {
infos.add( E_OpType::OP_RES_STACK , T_OpInfo{ "res-stack" , 1 } );
infos.add( E_OpType::OP_PUSH , T_OpInfo{ "push" , 0 , OpStackMain{ 1 } } );
infos.add( E_OpType::OP_POP , T_OpInfo{ "pop" , 1 } );
infos.add( E_OpType::OP_POP , T_OpInfo{ "dup" , 1 , OpStackMain{ 1 } } );
infos.add( E_OpType::OP_DUP , T_OpInfo{ "dup" , 1 , OpStackMain{ 1 } } );
//
infos.add( E_OpType::OP_LOAD , T_OpInfo{ "load" , 1 } );
infos.add( E_OpType::OP_SLOAD , T_OpInfo{ "load-stack" , 1 } );
@ -191,3 +191,344 @@ T_StringBuilder& ops::operator<<(
}
return sb;
}
/*= EMULATOR ===================================================================*/
X_OpFailure::X_OpFailure(
T_Op const& op ,
T_String error ) noexcept
: op_( &op ) , error_( std::move( error ) )
{
T_StringBuilder sb;
sb << "operation (" << op << ") failed; source: " << op.location
<< '\0';
fullMessage_ = std::move( sb );
}
char const* X_OpFailure::what( ) const noexcept
{
return fullMessage_.data( );
}
/*------------------------------------------------------------------------------*/
T_OpContext::T_OpContext(
T_OpProgram& program ) noexcept
: program( program )
{
stack.ensureCapacity( stack.growth( ) );
const auto nc{ program.constants.size( ) };
const auto ts{ 3 + nc + program.nVariables
+ program.nPrograms + program.nPipelines
+ program.nSamplers + program.nTextures };
values.resize( ts );
for ( auto i = 0u ; i < nc ; i ++ ) {
values[ i + 3 ] = program.constants[ nc ];
}
}
void T_OpContext::run(
const E_RunTarget target ,
const float time ,
const float width ,
const float height )
{
assert( !aborted );
x87sp = 0;
instrPtr = program.ops.firstOf( target == R_INIT ? program.init : program.frame );
values[ 0 ] = time;
values[ 1 ] = width;
values[ 2 ] = height;
stack.clear( );
stack.add( 0xffffffff );
while ( 0 /* FIXME */ ) {
// if ( instrPtr >= program.ops.
auto const& instr{ program.ops[ instrPtr ] };
switch ( instr.op ) {
case OP_END:
throw X_OpFailure{ instr , "invalid instruction" };
// --------------------------------------------------------------------------------
case OP_CALL:
if ( program.ops.size( ) <= instr.args[ 0 ] ) {
throw X_OpFailure{ instr , "invalid function index" };
}
stack.add( instrPtr + 1 );
instrPtr = program.ops.firstOf( instr.args[ 0 ] );
continue;
case OP_RET:
ensureStack( instr , 1 + instr.args[ 0 ] );
instrPtr = stack.last( ).u;
stack.resize( stack.size( ) - instr.args[ 0 ] - 1 );
continue;
case OP_SKIP:
// FIXME: make sure we don't go past the end
instrPtr += instr.args[ 0 ];
break;
case OP_COND_SKIP:
ensureStack( instr , 1 );
if ( stack.last( ).u != instr.args[ 1 ] ) {
// FIXME: make sure we don't go past the end
instrPtr += instr.args[ 0 ];
}
break;
// --------------------------------------------------------------------------------
case OP_RES_STACK:
stack.resize( stack.size( ) + instr.args[ 0 ] );
break;
case OP_PUSH:
stack.add( wreg );
break;
case OP_POP:
ensureStack( instr , instr.args[ 0 ] + 1 );
stack.resize( stack.size( ) - instr.args[ 0 ] - 1 );
break;
case OP_DUP:
ensureStack( instr , instr.args[ 0 ] + 1 );
stack.add( stack[ stack.size( ) - instr.args[ 0 ] - 1 ] );
break;
// --------------------------------------------------------------------------------
case OP_LOAD:
checkAddress( instr , instr.args[ 0 ] );
wreg = values[ instr.args[ 0 ] ];
break;
case OP_SLOAD:
ensureStack( instr , instr.args[ 0 ] + 1 );
wreg = stack[ stack.size( ) - instr.args[ 0 ] - 1 ];
break;
case OP_CONST:
wreg = instr.args[ 0 ];
break;
// --------------------------------------------------------------------------------
case OP_FP_LOAD:
ensureFpuStack( instr , 0 , 1 );
checkAddress( instr , instr.args[ 0 ] );
x87stack[ x87sp ++ ] = values[ instr.args[ 0 ] ].f;
break;
case OP_FP_STORE:
ensureFpuStack( instr , 1 , 0 );
checkAddress( instr , instr.args[ 0 ] );
values[ instr.args[ 0 ] ].f = x87stack[ -- x87sp ];
break;
case OP_FP_SLOAD:
ensureFpuStack( instr , 0 , 1 );
ensureStack( instr , instr.args[ 0 ] + 1 );
x87stack[ x87sp ++ ] = stack[ stack.size( ) - instr.args[ 0 ] - 1 ].f;
break;
case OP_FP_SSTORE:
ensureFpuStack( instr , 1 , 0 );
ensureStack( instr , instr.args[ 0 ] + 1 );
stack[ stack.size( ) - instr.args[ 0 ] - 1 ].f = x87stack[ -- x87sp ];
break;
case OP_FP_SSTORE_INT:
ensureFpuStack( instr , 1 , 0 );
ensureStack( instr , instr.args[ 0 ] + 1 );
stack[ stack.size( ) - instr.args[ 0 ] - 1 ].i = int32_t( x87stack[ -- x87sp ] );
break;
// --------------------------------------------------------------------------------
case OP_FP_CMP:
{
ensureFpuStack( instr , 2 , 0 );
const auto v2( x87stack[ x87sp - 1 ] ) ,
v1( x87stack[ x87sp - 2 ] );
x87sp --;
const bool rv{ ([&]( ) -> bool {
switch ( instr.args[ 0 ] ) {
case 0: return v1 == v2;
case 1: return v1 != v2;
case 2: return v1 > v2;
case 3: return v1 >= v2;
case 4: return v1 < v2;
case 5: return v1 <= v2;
}
throw X_OpFailure( instr , "invalid operation" );
})() };
x87stack[ x87sp - 1 ] = rv ? 1 : 0;
break;
}
case OP_FP_ADD:
{
ensureFpuStack( instr , 2 , 0 );
x87stack[ x87sp - 2 ] += x87stack[ x87sp - 1 ];
x87sp --;
break;
}
case OP_FP_SUB:
{
ensureFpuStack( instr , 2 , 0 );
x87stack[ x87sp - 2 ] -= x87stack[ x87sp - 1 ];
x87sp --;
break;
}
case OP_FP_MUL:
{
ensureFpuStack( instr , 2 , 0 );
x87stack[ x87sp - 2 ] *= x87stack[ x87sp - 1 ];
x87sp --;
break;
}
case OP_FP_DIV:
{
ensureFpuStack( instr , 2 , 0 );
if ( x87stack[ x87sp - 1 ] == 0 ) {
throw X_OpFailure{ instr , "arithmetic error" };
}
x87stack[ x87sp - 2 ] *= x87stack[ x87sp - 1 ];
x87sp --;
break;
}
case OP_FP_POW:
{
ensureFpuStack( instr , 2 , 0 );
x87stack[ x87sp - 2 ] = pow( x87stack[ x87sp - 2 ] ,
x87stack[ x87sp - 1 ] );
x87sp --;
break;
}
// --------------------------------------------------------------------------------
case OP_FP_NEG:
{
ensureFpuStack( instr , 1 , 1 );
x87stack[ x87sp - 1 ] = -x87stack[ x87sp - 1 ];
break;
}
case OP_FP_INV:
{
ensureFpuStack( instr , 1 , 1 );
if ( x87stack[ x87sp - 1 ] == 0 ) {
throw X_OpFailure{ instr , "arithmetic error" };
}
x87stack[ x87sp - 1 ] = 1.0 / x87stack[ x87sp - 1 ];
break;
}
case OP_FP_NOT:
{
ensureFpuStack( instr , 1 , 0 );
x87stack[ x87sp - 1 ] = x87stack[ x87sp - 1 ] == 0 ? 1 : 0;
break;
}
case OP_FP_SIN:
{
ensureFpuStack( instr , 1 , 0 );
x87stack[ x87sp - 1 ] = sin( x87stack[ x87sp - 1 ] );
break;
}
case OP_FP_COS:
{
ensureFpuStack( instr , 1 , 0 );
x87stack[ x87sp - 1 ] = cos( x87stack[ x87sp - 1 ] );
break;
}
case OP_FP_TAN:
{
ensureFpuStack( instr , 1 , 1 );
const auto c( cos( x87stack[ x87sp - 1 ] ) );
if ( c == 0 ) {
throw X_OpFailure{ instr , "arithmetic error" };
}
x87stack[ x87sp - 1 ] = sin( x87stack[ x87sp - 1 ] ) / c;
break;
}
case OP_FP_SQRT:
{
ensureFpuStack( instr , 1 , 0 );
const auto v( x87stack[ x87sp - 1 ] );
if ( v < 0 ) {
throw X_OpFailure{ instr , "arithmetic error" };
}
x87stack[ x87sp - 1 ] = sqrt( v );
break;
}
case OP_FP_EXP:
{
ensureFpuStack( instr , 1 , 0 ); // FIXME: need FPU stack space
x87stack[ x87sp - 1 ] = exp( x87stack[ x87sp - 1 ] );
break;
}
case OP_FP_LN:
{
ensureFpuStack( instr , 1 , 0 ); // FIXME: need FPU stack space
x87stack[ x87sp - 1 ] = log( x87stack[ x87sp - 1 ] );
break;
}
}
instrPtr ++;
}
}
void T_OpContext::ensureStack(
T_Op const& op ,
const uint32_t min )
{
if ( stack.size( ) < min ) {
throw X_OpFailure{ op , "stack underrun" };
}
}
void T_OpContext::ensureFpuStack(
T_Op const& op ,
const uint32_t minStacked ,
const uint32_t minFree )
{
if ( x87sp < minStacked ) {
throw X_OpFailure{ op , "FPU stack underrun" };
}
if ( 8 - x87sp < minFree ) {
throw X_OpFailure{ op , "FPU stack overflow" };
}
}
void T_OpContext::checkAddress(
T_Op const& op ,
const uint32_t address )
{
if ( address >= values.size( ) ) {
throw X_OpFailure( op , "invalid access" );
}
}