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135 lines
5.9 KiB
C
135 lines
5.9 KiB
C
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#ifndef SOFTFLOAT_H_
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#define SOFTFLOAT_H_
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/*============================================================================
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This C header file template is part of the Berkeley SoftFloat IEEE Floating-
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Point Arithmetic Package, Release 2c, by John R. Hauser.
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THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort has
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been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
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RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
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AND ORGANIZATIONS WHO CAN AND WILL TOLERATE ALL LOSSES, COSTS, OR OTHER
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PROBLEMS THEY INCUR DUE TO THE SOFTWARE WITHOUT RECOMPENSE FROM JOHN HAUSER OR
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THE INTERNATIONAL COMPUTER SCIENCE INSTITUTE, AND WHO FURTHERMORE EFFECTIVELY
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INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE INSTITUTE
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(possibly via similar legal notice) AGAINST ALL LOSSES, COSTS, OR OTHER
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PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE, OR
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INCURRED BY ANYONE DUE TO A DERIVATIVE WORK THEY CREATE USING ANY PART OF THE
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SOFTWARE.
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Derivative works require also that (1) the source code for the derivative work
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includes prominent notice that the work is derivative, and (2) the source code
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includes prominent notice of these three paragraphs for those parts of this
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code that are retained.
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=============================================================================*/
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/*----------------------------------------------------------------------------
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| Software IEEE floating-point types.
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*----------------------------------------------------------------------------*/
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typedef unsigned long float32;
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typedef struct {
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unsigned long high, low;
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} float64;
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/*----------------------------------------------------------------------------
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| Software IEEE floating-point underflow tininess-detection mode.
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*----------------------------------------------------------------------------*/
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extern signed char float_detect_tininess;
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enum {
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float_tininess_after_rounding = 0,
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float_tininess_before_rounding = 1
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};
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/*----------------------------------------------------------------------------
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| Software IEEE floating-point rounding mode.
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*----------------------------------------------------------------------------*/
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extern signed char float_rounding_mode;
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enum {
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float_round_nearest_even = 0,
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float_round_to_zero = 1,
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float_round_down = 2,
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float_round_up = 3
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};
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/*----------------------------------------------------------------------------
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| Software IEEE floating-point exception flags.
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*----------------------------------------------------------------------------*/
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extern signed char float_exception_flags;
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enum {
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float_flag_inexact = 1,
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float_flag_underflow = 2,
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float_flag_overflow = 4,
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float_flag_divbyzero = 8,
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float_flag_invalid = 16
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};
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/*----------------------------------------------------------------------------
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| Routine to raise any or all of the software IEEE floating-point exception
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| flags.
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*----------------------------------------------------------------------------*/
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void float_raise( signed char );
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/*----------------------------------------------------------------------------
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| Software IEEE integer-to-floating-point conversion routines.
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*----------------------------------------------------------------------------*/
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float32 int32_to_float32( int32 );
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float64 int32_to_float64( int32 );
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/*----------------------------------------------------------------------------
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| Software IEEE single-precision conversion routines.
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*----------------------------------------------------------------------------*/
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int32 float32_to_int32( float32 );
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int32 float32_to_int32_round_to_zero( float32 );
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float64 float32_to_float64( float32 );
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/*----------------------------------------------------------------------------
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| Software IEEE single-precision operations.
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*----------------------------------------------------------------------------*/
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float32 __fastcall__ float32_round_to_int( float32 );
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float32 __fastcall__ float32_add( float32, float32 );
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float32 __fastcall__ float32_sub( float32, float32 );
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float32 __fastcall__ float32_rsub( float32, float32 );
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float32 __fastcall__ float32_mul( float32, float32 );
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float32 __fastcall__ float32_div( float32, float32 );
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float32 __fastcall__ float32_rem( float32, float32 );
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float32 __fastcall__ float32_sqrt( float32 );
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unsigned char __fastcall__ float32_eq( float32, float32 );
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unsigned char __fastcall__ float32_le( float32, float32 );
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unsigned char __fastcall__ float32_lt( float32, float32 );
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unsigned char __fastcall__ float32_eq_signaling( float32, float32 );
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unsigned char __fastcall__ float32_le_quiet( float32, float32 );
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unsigned char __fastcall__ float32_lt_quiet( float32, float32 );
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unsigned char __fastcall__ float32_is_signaling_nan( float32 );
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#ifdef DOUBLES
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/*----------------------------------------------------------------------------
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| Software IEEE double-precision conversion routines.
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*----------------------------------------------------------------------------*/
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signed short float64_to_int32( float64 );
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signed short float64_to_int32_round_to_zero( float64 );
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float32 float64_to_float32( float64 );
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/*----------------------------------------------------------------------------
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| Software IEEE double-precision operations.
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*----------------------------------------------------------------------------*/
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float64 float64_round_to_int( float64 );
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float64 float64_add( float64, float64 );
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float64 float64_sub( float64, float64 );
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float64 float64_mul( float64, float64 );
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float64 float64_div( float64, float64 );
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float64 float64_rem( float64, float64 );
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float64 float64_sqrt( float64 );
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unsigned char float64_eq( float64, float64 );
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unsigned char float64_le( float64, float64 );
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unsigned char float64_lt( float64, float64 );
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unsigned char float64_eq_signaling( float64, float64 );
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unsigned char float64_le_quiet( float64, float64 );
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unsigned char float64_lt_quiet( float64, float64 );
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unsigned char float64_is_signaling_nan( float64 );
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#endif
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#endif /* SOFTFLOAT_H_ */
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