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- fixed soft float support so megaglest might now work with other architectures at least in terms of streflop support
This commit is contained in:
Mark Vejvoda
336
source/shared_lib/include/streflop/softfloat/softfloat.h
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336
source/shared_lib/include/streflop/softfloat/softfloat.h
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/*============================================================================
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PROMINENT NOTICE: THIS IS A DERIVATIVE WORK OF THE ORIGINAL SOFTFLOAT CODE
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CHANGES:
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Comment out FLOAT128
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Removed all signed char => char
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Inserted this file is a namespace
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Added variable to control the sending of real system traps
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Protect this header by a #define
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pack the fields of floatx80, just in case (should be useless)
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Nicolas Brodu, 2006
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=============================================================================*/
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#ifndef SOFTFLOAT_H
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#define SOFTFLOAT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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namespace streflop {
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namespace SoftFloat {
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// Control which of the softfloat exceptions will send real system traps
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// Uses streflop FE_XXX flags, see the softfloat-specialize file
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extern int float_exception_realtraps;
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/*============================================================================
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This C header file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic
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Package, Release 2b.
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Written by John R. Hauser. This work was made possible in part by the
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International Computer Science Institute, located at Suite 600, 1947 Center
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Street, Berkeley, California 94704. Funding was partially provided by the
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National Science Foundation under grant MIP-9311980. The original version
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of this code was written as part of a project to build a fixed-point vector
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processor in collaboration with the University of California at Berkeley,
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overseen by Profs. Nelson Morgan and John Wawrzynek. More information
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is available through the Web page `http://www.cs.berkeley.edu/~jhauser/
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arithmetic/SoftFloat.html'.
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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 TAKE FULL RESPONSIBILITY FOR ALL LOSSES,
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COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE
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EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE
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INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR
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OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE.
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Derivative works are acceptable, even for commercial purposes, so long as
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(1) the source code for the derivative work includes prominent notice that
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the work is derivative, and (2) the source code includes prominent notice with
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these four paragraphs for those parts of this code that are retained.
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=============================================================================*/
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/*----------------------------------------------------------------------------
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| The macro `FLOATX80' must be defined to enable the extended double-precision
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| floating-point format `floatx80'. If this macro is not defined, the
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| `floatx80' type will not be defined, and none of the functions that either
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| input or output the `floatx80' type will be defined. The same applies to
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| the `FLOAT128' macro and the quadruple-precision format `float128'.
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*----------------------------------------------------------------------------*/
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#define FLOATX80
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//#define FLOAT128
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//typedef SizedInteger<32>::Type int32_t;
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//typedef int32_t int32;
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE floating-point types.
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*----------------------------------------------------------------------------*/
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typedef unsigned int float32;
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typedef unsigned long long float64;
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#ifdef FLOATX80
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typedef struct {
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unsigned long long low;
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unsigned short high
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#ifdef __GNUC__
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// Should be useless, since it's aligned at 64 already
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__attribute__ ((__packed__));
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#endif
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;
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} floatx80;
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#endif
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#ifdef FLOAT128
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typedef struct {
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unsigned long long low, high;
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} float128;
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE floating-point underflow tininess-detection mode.
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*----------------------------------------------------------------------------*/
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extern 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 IEC/IEEE floating-point rounding mode.
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*----------------------------------------------------------------------------*/
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extern char float_rounding_mode;
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enum {
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float_round_nearest_even = 0,
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float_round_down = 1,
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float_round_up = 2,
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float_round_to_zero = 3
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};
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE floating-point exception flags.
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*----------------------------------------------------------------------------*/
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extern char float_exception_flags;
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enum {
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float_flag_invalid = 1,
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float_flag_divbyzero = 4,
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float_flag_overflow = 8,
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float_flag_underflow = 16,
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float_flag_inexact = 32
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};
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/*----------------------------------------------------------------------------
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| Routine to raise any or all of the software IEC/IEEE floating-point
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| exception flags.
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*----------------------------------------------------------------------------*/
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void float_raise( char );
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE integer-to-floating-point conversion routines.
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*----------------------------------------------------------------------------*/
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float32 int32_to_float32( int );
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float64 int32_to_float64( int );
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#ifdef FLOATX80
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floatx80 int32_to_floatx80( int );
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#endif
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#ifdef FLOAT128
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float128 int32_to_float128( int );
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#endif
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float32 int64_to_float32( long long );
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float64 int64_to_float64( long long );
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#ifdef FLOATX80
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floatx80 int64_to_floatx80( long long );
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#endif
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#ifdef FLOAT128
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float128 int64_to_float128( long long );
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE single-precision conversion routines.
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*----------------------------------------------------------------------------*/
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int float32_to_int32( float32 );
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//inline int float32_to_int32( unsigned int value) { return float32_to_int32( static_cast<float32>(value) ); }
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int float32_to_int32_round_to_zero( float32 );
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//inline int float32_to_int32_round_to_zero( unsigned int value) { return float32_to_int32_round_to_zero( static_cast<float32>(value) ); }
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long long float32_to_int64( float32 );
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//inline long long float32_to_int64( unsigned int value) { return float32_to_int64( static_cast<float32>(value) ); }
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long long float32_to_int64_round_to_zero( float32 );
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//inline long long float32_to_int64_round_to_zero( unsigned int value) { return float32_to_int64_round_to_zero(static_cast<float32>(value)); }
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float64 float32_to_float64( float32 );
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//inline float64 float32_to_float64( unsigned int value) { return float32_to_float64( static_cast<float32>(value) ); }
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#ifdef FLOATX80
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floatx80 float32_to_floatx80( float32 );
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#endif
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#ifdef FLOAT128
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float128 float32_to_float128( float32 );
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE single-precision operations.
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*----------------------------------------------------------------------------*/
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float32 float32_round_to_int( float32 );
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//inline float32 float32_round_to_int( unsigned int value) { return float32_round_to_int( static_cast<float32>(value) ); }
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float32 float32_add( float32, float32 );
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//inline float32 float32_add( unsigned int value1, unsigned int value2) { return float32_add( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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float32 float32_sub( float32, float32 );
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//inline float32 float32_sub( unsigned int value1, unsigned int value2) { return float32_sub( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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float32 float32_mul( float32, float32 );
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//inline float32 float32_mul( unsigned int value1, unsigned int value2) { return float32_mul( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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float32 float32_div( float32, float32 );
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//inline float32 float32_div( unsigned int value1, unsigned int value2) { return float32_div( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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float32 float32_rem( float32, float32 );
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//inline float32 float32_rem( unsigned int value1, unsigned int value2) { return float32_rem( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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float32 float32_sqrt( float32 );
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//inline float32 float32_sqrt( unsigned int value1) { return float32_sqrt( static_cast<float32>(value1) ); }
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char float32_eq( float32, float32 );
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//inline char float32_eq( unsigned int value1, unsigned int value2) { return float32_eq( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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char float32_le( float32, float32 );
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//inline char float32_le( unsigned int value1, unsigned int value2) { return float32_le( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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char float32_lt( float32, float32 );
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//inline char float32_lt( unsigned int value1, unsigned int value2) { return float32_lt( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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char float32_eq_signaling( float32, float32 );
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//inline char float32_eq_signaling( unsigned int value1, unsigned int value2) { return float32_eq_signaling( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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char float32_le_quiet( float32, float32 );
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//inline char float32_le_quiet( unsigned int value1, unsigned int value2) { return float32_le_quiet( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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char float32_lt_quiet( float32, float32 );
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//inline char float32_lt_quiet( unsigned int value1, unsigned int value2) { return float32_lt_quiet( static_cast<float32>(value1), static_cast<float32>(value2) ); }
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char float32_is_signaling_nan( float32 );
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//inline char float32_is_signaling_nan( unsigned int value1) { return float32_is_signaling_nan( static_cast<float32>(value1) ); }
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE double-precision conversion routines.
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*----------------------------------------------------------------------------*/
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int float64_to_int32( float64 );
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int float64_to_int32_round_to_zero( float64 );
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long long float64_to_int64( float64 );
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long long float64_to_int64_round_to_zero( float64 );
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float32 float64_to_float32( float64 );
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#ifdef FLOATX80
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floatx80 float64_to_floatx80( float64 );
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#endif
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#ifdef FLOAT128
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float128 float64_to_float128( float64 );
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/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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char float64_eq( float64, float64 );
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char float64_le( float64, float64 );
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char float64_lt( float64, float64 );
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char float64_eq_signaling( float64, float64 );
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char float64_le_quiet( float64, float64 );
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char float64_lt_quiet( float64, float64 );
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char float64_is_signaling_nan( float64 );
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#ifdef FLOATX80
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE extended double-precision conversion routines.
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*----------------------------------------------------------------------------*/
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int floatx80_to_int32( floatx80 );
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int floatx80_to_int32_round_to_zero( floatx80 );
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long long floatx80_to_int64( floatx80 );
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long long floatx80_to_int64_round_to_zero( floatx80 );
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float32 floatx80_to_float32( floatx80 );
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float64 floatx80_to_float64( floatx80 );
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#ifdef FLOAT128
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float128 floatx80_to_float128( floatx80 );
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE extended double-precision rounding precision. Valid
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| values are 32, 64, and 80.
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*----------------------------------------------------------------------------*/
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extern char floatx80_rounding_precision;
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE extended double-precision operations.
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*----------------------------------------------------------------------------*/
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floatx80 floatx80_round_to_int( floatx80 );
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floatx80 floatx80_add( floatx80, floatx80 );
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floatx80 floatx80_sub( floatx80, floatx80 );
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floatx80 floatx80_mul( floatx80, floatx80 );
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floatx80 floatx80_div( floatx80, floatx80 );
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floatx80 floatx80_rem( floatx80, floatx80 );
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floatx80 floatx80_sqrt( floatx80 );
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char floatx80_eq( floatx80, floatx80 );
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char floatx80_le( floatx80, floatx80 );
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char floatx80_lt( floatx80, floatx80 );
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char floatx80_eq_signaling( floatx80, floatx80 );
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char floatx80_le_quiet( floatx80, floatx80 );
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char floatx80_lt_quiet( floatx80, floatx80 );
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char floatx80_is_signaling_nan( floatx80 );
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#endif
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#ifdef FLOAT128
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE quadruple-precision conversion routines.
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*----------------------------------------------------------------------------*/
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int float128_to_int32( float128 );
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int float128_to_int32_round_to_zero( float128 );
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long long float128_to_int64( float128 );
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long long float128_to_int64_round_to_zero( float128 );
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float32 float128_to_float32( float128 );
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float64 float128_to_float64( float128 );
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#ifdef FLOATX80
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floatx80 float128_to_floatx80( float128 );
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE quadruple-precision operations.
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*----------------------------------------------------------------------------*/
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float128 float128_round_to_int( float128 );
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float128 float128_add( float128, float128 );
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float128 float128_sub( float128, float128 );
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float128 float128_mul( float128, float128 );
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float128 float128_div( float128, float128 );
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float128 float128_rem( float128, float128 );
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float128 float128_sqrt( float128 );
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char float128_eq( float128, float128 );
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char float128_le( float128, float128 );
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char float128_lt( float128, float128 );
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char float128_eq_signaling( float128, float128 );
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char float128_le_quiet( float128, float128 );
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char float128_lt_quiet( float128, float128 );
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char float128_is_signaling_nan( float128 );
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#endif
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// Close namespaces
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}
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}
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif
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