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#include <defs.h>
#define MCPP_INTEGER_BITS 64U
static __mpu_int64_t
mcpp_semantic_signed( mcpp_integer value )
{
if( value.value <= (__mpu_uint64_t)INT64_MAX )
return( (__mpu_int64_t)value.value );
return( -1 - (__mpu_int64_t)(UINT64_MAX - value.value) );
}
static __mpu_uint64_t
mcpp_semantic_unsigned_from_signed( __mpu_int64_t value )
{
if( value >= 0 )
return( (__mpu_uint64_t)value );
return( UINT64_MAX - (__mpu_uint64_t)(-(value + 1)) );
}
static unsigned
mcpp_semantic_shift_count( mcpp_integer value, int *negative )
{
__mpu_uint64_t magnitude;
*negative = 0;
if( !value.unsignedp && mcpp_semantic_signed(value) < 0 )
{
*negative = 1;
magnitude = (__mpu_uint64_t)0 - value.value;
}
else
magnitude = value.value;
if( magnitude >= MCPP_INTEGER_BITS )
return( MCPP_INTEGER_BITS );
return( (unsigned)magnitude );
}
static mcpp_integer
mcpp_semantic_shift_left_count( mcpp_integer value, unsigned shift )
{
mcpp_integer result;
result.unsignedp = value.unsignedp;
if( shift >= MCPP_INTEGER_BITS )
result.value = 0;
else
result.value = value.value << shift;
return( result );
}
static mcpp_integer
mcpp_semantic_shift_right_count( mcpp_integer value, unsigned shift )
{
mcpp_integer result;
int negative;
result.unsignedp = value.unsignedp;
negative = !value.unsignedp && mcpp_semantic_signed(value) < 0;
if( shift >= MCPP_INTEGER_BITS )
{
result.value = negative ? UINT64_MAX : 0;
return( result );
}
if( shift == 0 || value.unsignedp || !negative )
{
result.value = value.value >> shift;
return( result );
}
result.value = (value.value >> shift) |
(UINT64_MAX << (MCPP_INTEGER_BITS - shift));
return( result );
}
void
mcpp_semantic_context_init( mcpp_semantic_context *context,
const char *filename,
unsigned line_number,
const mcpp_options *options )
{
context->filename = filename;
context->line_number = line_number;
context->options = options;
context->failed = 0;
}
void
mcpp_semantic_error( mcpp_semantic_context *context, const char *message )
{
if( context->failed )
return;
fprintf( stderr, "%s:%u: error: %s\n",
context->filename, context->line_number, message );
context->failed = 1;
}
void
mcpp_semantic_warning( mcpp_semantic_context *context,
const char *message )
{
if( mcpp_diagnostic_warning(context->options,
context->filename, context->line_number,
"%s", message) != 0 )
context->failed = 1;
}
int
mcpp_semantic_failed( const mcpp_semantic_context *context )
{
return( context->failed );
}
mcpp_integer
mcpp_semantic_make( __mpu_uint64_t value, int unsignedp )
{
mcpp_integer result;
result.value = value;
result.unsignedp = unsignedp ? 1 : 0;
return( result );
}
int
mcpp_semantic_true( mcpp_integer value )
{
return( value.value != 0 );
}
mcpp_integer
mcpp_semantic_neg( mcpp_integer value )
{
value.value = (__mpu_uint64_t)0 - value.value;
return( value );
}
mcpp_integer
mcpp_semantic_not( mcpp_integer value )
{
return( mcpp_semantic_make(!mcpp_semantic_true(value), 0) );
}
mcpp_integer
mcpp_semantic_compl( mcpp_integer value )
{
value.value = ~value.value;
return( value );
}
mcpp_integer
mcpp_semantic_mul( mcpp_integer left, mcpp_integer right )
{
return( mcpp_semantic_make(left.value * right.value,
left.unsignedp || right.unsignedp) );
}
mcpp_integer
mcpp_semantic_div( mcpp_semantic_context *context,
mcpp_integer left, mcpp_integer right, int evaluate )
{
int unsignedp = left.unsignedp || right.unsignedp;
if( right.value == 0 )
{
if( evaluate )
mcpp_semantic_error( context, "division by zero in #if expression" );
return( mcpp_semantic_make(0, unsignedp) );
}
if( unsignedp )
return( mcpp_semantic_make(left.value / right.value, 1) );
if( mcpp_semantic_signed(left) == INT64_MIN &&
mcpp_semantic_signed(right) == -1 )
return( mcpp_semantic_make((__mpu_uint64_t)1 << 63, 0) );
return( mcpp_semantic_make(
mcpp_semantic_unsigned_from_signed(
mcpp_semantic_signed(left) / mcpp_semantic_signed(right)), 0) );
}
mcpp_integer
mcpp_semantic_mod( mcpp_semantic_context *context,
mcpp_integer left, mcpp_integer right, int evaluate )
{
int unsignedp = left.unsignedp || right.unsignedp;
if( right.value == 0 )
{
if( evaluate )
mcpp_semantic_error( context, "division by zero in #if expression" );
return( mcpp_semantic_make(0, unsignedp) );
}
if( unsignedp )
return( mcpp_semantic_make(left.value % right.value, 1) );
if( mcpp_semantic_signed(left) == INT64_MIN &&
mcpp_semantic_signed(right) == -1 )
return( mcpp_semantic_make(0, 0) );
return( mcpp_semantic_make(
mcpp_semantic_unsigned_from_signed(
mcpp_semantic_signed(left) % mcpp_semantic_signed(right)), 0) );
}
mcpp_integer
mcpp_semantic_add( mcpp_integer left, mcpp_integer right )
{
return( mcpp_semantic_make(left.value + right.value,
left.unsignedp || right.unsignedp) );
}
mcpp_integer
mcpp_semantic_sub( mcpp_integer left, mcpp_integer right )
{
return( mcpp_semantic_make(left.value - right.value,
left.unsignedp || right.unsignedp) );
}
mcpp_integer
mcpp_semantic_lshift( mcpp_integer left, mcpp_integer right )
{
unsigned shift;
int negative;
shift = mcpp_semantic_shift_count( right, &negative );
if( negative )
return( mcpp_semantic_shift_right_count(left, shift) );
return( mcpp_semantic_shift_left_count(left, shift) );
}
mcpp_integer
mcpp_semantic_rshift( mcpp_integer left, mcpp_integer right )
{
unsigned shift;
int negative;
shift = mcpp_semantic_shift_count( right, &negative );
if( negative )
return( mcpp_semantic_shift_left_count(left, shift) );
return( mcpp_semantic_shift_right_count(left, shift) );
}
mcpp_integer
mcpp_semantic_equal( mcpp_integer left, mcpp_integer right )
{
int unsignedp = left.unsignedp || right.unsignedp;
int value = unsignedp ? left.value == right.value :
mcpp_semantic_signed(left) == mcpp_semantic_signed(right);
return( mcpp_semantic_make((__mpu_uint64_t)value, 0) );
}
mcpp_integer
mcpp_semantic_notequal( mcpp_integer left, mcpp_integer right )
{
mcpp_integer result = mcpp_semantic_equal( left, right );
result.value = !result.value;
return( result );
}
mcpp_integer
mcpp_semantic_less( mcpp_integer left, mcpp_integer right )
{
int unsignedp = left.unsignedp || right.unsignedp;
int value = unsignedp ? left.value < right.value :
mcpp_semantic_signed(left) < mcpp_semantic_signed(right);
return( mcpp_semantic_make((__mpu_uint64_t)value, 0) );
}
mcpp_integer
mcpp_semantic_greater( mcpp_integer left, mcpp_integer right )
{
int unsignedp = left.unsignedp || right.unsignedp;
int value = unsignedp ? left.value > right.value :
mcpp_semantic_signed(left) > mcpp_semantic_signed(right);
return( mcpp_semantic_make((__mpu_uint64_t)value, 0) );
}
mcpp_integer
mcpp_semantic_leq( mcpp_integer left, mcpp_integer right )
{
int unsignedp = left.unsignedp || right.unsignedp;
int value = unsignedp ? left.value <= right.value :
mcpp_semantic_signed(left) <= mcpp_semantic_signed(right);
return( mcpp_semantic_make((__mpu_uint64_t)value, 0) );
}
mcpp_integer
mcpp_semantic_geq( mcpp_integer left, mcpp_integer right )
{
int unsignedp = left.unsignedp || right.unsignedp;
int value = unsignedp ? left.value >= right.value :
mcpp_semantic_signed(left) >= mcpp_semantic_signed(right);
return( mcpp_semantic_make((__mpu_uint64_t)value, 0) );
}
mcpp_integer
mcpp_semantic_bitand( mcpp_integer left, mcpp_integer right )
{
return( mcpp_semantic_make(left.value & right.value,
left.unsignedp || right.unsignedp) );
}
mcpp_integer
mcpp_semantic_bitxor( mcpp_integer left, mcpp_integer right )
{
return( mcpp_semantic_make(left.value ^ right.value,
left.unsignedp || right.unsignedp) );
}
mcpp_integer
mcpp_semantic_bitor( mcpp_integer left, mcpp_integer right )
{
return( mcpp_semantic_make(left.value | right.value,
left.unsignedp || right.unsignedp) );
}
mcpp_integer
mcpp_semantic_and( mcpp_integer left, mcpp_integer right )
{
return( mcpp_semantic_make(mcpp_semantic_true(left) && mcpp_semantic_true(right), 0) );
}
mcpp_integer
mcpp_semantic_or( mcpp_integer left, mcpp_integer right )
{
return( mcpp_semantic_make(mcpp_semantic_true(left) || mcpp_semantic_true(right), 0) );
}
mcpp_integer
mcpp_semantic_conditional( mcpp_integer condition,
mcpp_integer yes, mcpp_integer no )
{
mcpp_integer result = mcpp_semantic_true(condition) ? yes : no;
result.unsignedp = yes.unsignedp || no.unsignedp;
return( result );
}
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