1bbb83b526
- Use some files from ARM version. - Use NetBSD software floating point library to provide floating point operations not handled directly by hardware floating point enabled GCC compiler. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Harry Liebel <Harry.Liebel@arm.com> Reviewed-by: Olivier Martin <Olivier.Martin@arm.com> Reviewed-by: Daryl McDaniel <edk2-lists@mc2research.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18118 6f19259b-4bc3-4df7-8a09-765794883524
317 lines
11 KiB
C
317 lines
11 KiB
C
/* $NetBSD: softfloat.h,v 1.10 2013/04/24 18:04:46 matt Exp $ */
|
|
|
|
/* This is a derivative work. */
|
|
|
|
/*
|
|
===============================================================================
|
|
|
|
This C header file is part of the SoftFloat IEC/IEEE Floating-point
|
|
Arithmetic Package, Release 2a.
|
|
|
|
Written by John R. Hauser. This work was made possible in part by the
|
|
International Computer Science Institute, located at Suite 600, 1947 Center
|
|
Street, Berkeley, California 94704. Funding was partially provided by the
|
|
National Science Foundation under grant MIP-9311980. The original version
|
|
of this code was written as part of a project to build a fixed-point vector
|
|
processor in collaboration with the University of California at Berkeley,
|
|
overseen by Profs. Nelson Morgan and John Wawrzynek. More information
|
|
is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
|
|
arithmetic/SoftFloat.html'.
|
|
|
|
THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
|
|
has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
|
|
TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
|
|
PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
|
|
AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
|
|
|
|
Derivative works are acceptable, even for commercial purposes, so long as
|
|
(1) they include prominent notice that the work is derivative, and (2) they
|
|
include prominent notice akin to these four paragraphs for those parts of
|
|
this code that are retained.
|
|
|
|
===============================================================================
|
|
*/
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
The macro `FLOATX80' must be defined to enable the extended double-precision
|
|
floating-point format `floatx80'. If this macro is not defined, the
|
|
`floatx80' type will not be defined, and none of the functions that either
|
|
input or output the `floatx80' type will be defined. The same applies to
|
|
the `FLOAT128' macro and the quadruple-precision format `float128'.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
/* #define FLOATX80 */
|
|
#define FLOAT128
|
|
|
|
#include <stdint.h>
|
|
#include <machine/ieeefp.h>
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE floating-point types.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
typedef unsigned int float32;
|
|
typedef unsigned long long float64;
|
|
#ifdef FLOATX80
|
|
typedef struct {
|
|
unsigned short high;
|
|
unsigned long long low;
|
|
} floatx80;
|
|
#endif
|
|
#ifdef FLOAT128
|
|
typedef struct {
|
|
unsigned long long high, low;
|
|
} float128;
|
|
#endif
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE floating-point underflow tininess-detection mode.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
#ifndef SOFTFLOAT_FOR_GCC
|
|
extern int float_detect_tininess;
|
|
#endif
|
|
enum {
|
|
float_tininess_after_rounding = 0,
|
|
float_tininess_before_rounding = 1
|
|
};
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE floating-point rounding mode.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
extern fp_rnd float_rounding_mode;
|
|
#define float_round_nearest_even FP_RN
|
|
#define float_round_to_zero FP_RZ
|
|
#define float_round_down FP_RM
|
|
#define float_round_up FP_RP
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE floating-point exception flags.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
extern fp_except float_exception_flags;
|
|
extern fp_except float_exception_mask;
|
|
enum {
|
|
float_flag_inexact = FP_X_IMP,
|
|
float_flag_underflow = FP_X_UFL,
|
|
float_flag_overflow = FP_X_OFL,
|
|
float_flag_divbyzero = FP_X_DZ,
|
|
float_flag_invalid = FP_X_INV
|
|
};
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Routine to raise any or all of the software IEC/IEEE floating-point
|
|
exception flags.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
void float_raise( fp_except );
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE integer-to-floating-point conversion routines.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
float32 int32_to_float32( int32 );
|
|
float32 uint32_to_float32( uint32 );
|
|
float64 int32_to_float64( int32 );
|
|
float64 uint32_to_float64( uint32 );
|
|
#ifdef FLOATX80
|
|
floatx80 int32_to_floatx80( int32 );
|
|
floatx80 uint32_to_floatx80( uint32 );
|
|
#endif
|
|
#ifdef FLOAT128
|
|
float128 int32_to_float128( int32 );
|
|
float128 uint32_to_float128( uint32 );
|
|
#endif
|
|
#ifndef SOFTFLOAT_FOR_GCC /* __floatdi?f is in libgcc2.c */
|
|
float32 int64_to_float32( long long );
|
|
float64 int64_to_float64( long long );
|
|
#ifdef FLOATX80
|
|
floatx80 int64_to_floatx80( long long );
|
|
#endif
|
|
#ifdef FLOAT128
|
|
float128 int64_to_float128( long long );
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE single-precision conversion routines.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
int float32_to_int32( float32 );
|
|
int float32_to_int32_round_to_zero( float32 );
|
|
#if defined(SOFTFLOAT_FOR_GCC) && defined(SOFTFLOAT_NEED_FIXUNS)
|
|
unsigned int float32_to_uint32_round_to_zero( float32 );
|
|
#endif
|
|
#ifndef SOFTFLOAT_FOR_GCC /* __fix?fdi provided by libgcc2.c */
|
|
long long float32_to_int64( float32 );
|
|
long long float32_to_int64_round_to_zero( float32 );
|
|
#endif
|
|
float64 float32_to_float64( float32 );
|
|
#ifdef FLOATX80
|
|
floatx80 float32_to_floatx80( float32 );
|
|
#endif
|
|
#ifdef FLOAT128
|
|
float128 float32_to_float128( float32 );
|
|
#endif
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE single-precision operations.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
float32 float32_round_to_int( float32 );
|
|
float32 float32_add( float32, float32 );
|
|
float32 float32_sub( float32, float32 );
|
|
float32 float32_mul( float32, float32 );
|
|
float32 float32_div( float32, float32 );
|
|
float32 float32_rem( float32, float32 );
|
|
float32 float32_sqrt( float32 );
|
|
int float32_eq( float32, float32 );
|
|
int float32_le( float32, float32 );
|
|
int float32_lt( float32, float32 );
|
|
int float32_eq_signaling( float32, float32 );
|
|
int float32_le_quiet( float32, float32 );
|
|
int float32_lt_quiet( float32, float32 );
|
|
#ifndef SOFTFLOAT_FOR_GCC
|
|
int float32_is_signaling_nan( float32 );
|
|
#endif
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE double-precision conversion routines.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
int float64_to_int32( float64 );
|
|
int float64_to_int32_round_to_zero( float64 );
|
|
#if defined(SOFTFLOAT_FOR_GCC) && defined(SOFTFLOAT_NEED_FIXUNS)
|
|
unsigned int float64_to_uint32_round_to_zero( float64 );
|
|
#endif
|
|
#ifndef SOFTFLOAT_FOR_GCC /* __fix?fdi provided by libgcc2.c */
|
|
long long float64_to_int64( float64 );
|
|
long long float64_to_int64_round_to_zero( float64 );
|
|
#endif
|
|
float32 float64_to_float32( float64 );
|
|
#ifdef FLOATX80
|
|
floatx80 float64_to_floatx80( float64 );
|
|
#endif
|
|
#ifdef FLOAT128
|
|
float128 float64_to_float128( float64 );
|
|
#endif
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE double-precision operations.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
float64 float64_round_to_int( float64 );
|
|
float64 float64_add( float64, float64 );
|
|
float64 float64_sub( float64, float64 );
|
|
float64 float64_mul( float64, float64 );
|
|
float64 float64_div( float64, float64 );
|
|
float64 float64_rem( float64, float64 );
|
|
float64 float64_sqrt( float64 );
|
|
int float64_eq( float64, float64 );
|
|
int float64_le( float64, float64 );
|
|
int float64_lt( float64, float64 );
|
|
int float64_eq_signaling( float64, float64 );
|
|
int float64_le_quiet( float64, float64 );
|
|
int float64_lt_quiet( float64, float64 );
|
|
#ifndef SOFTFLOAT_FOR_GCC
|
|
int float64_is_signaling_nan( float64 );
|
|
#endif
|
|
|
|
#ifdef FLOATX80
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE extended double-precision conversion routines.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
int floatx80_to_int32( floatx80 );
|
|
int floatx80_to_int32_round_to_zero( floatx80 );
|
|
long long floatx80_to_int64( floatx80 );
|
|
long long floatx80_to_int64_round_to_zero( floatx80 );
|
|
float32 floatx80_to_float32( floatx80 );
|
|
float64 floatx80_to_float64( floatx80 );
|
|
#ifdef FLOAT128
|
|
float128 floatx80_to_float128( floatx80 );
|
|
#endif
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE extended double-precision rounding precision. Valid
|
|
values are 32, 64, and 80.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
extern int floatx80_rounding_precision;
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE extended double-precision operations.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
floatx80 floatx80_round_to_int( floatx80 );
|
|
floatx80 floatx80_add( floatx80, floatx80 );
|
|
floatx80 floatx80_sub( floatx80, floatx80 );
|
|
floatx80 floatx80_mul( floatx80, floatx80 );
|
|
floatx80 floatx80_div( floatx80, floatx80 );
|
|
floatx80 floatx80_rem( floatx80, floatx80 );
|
|
floatx80 floatx80_sqrt( floatx80 );
|
|
int floatx80_eq( floatx80, floatx80 );
|
|
int floatx80_le( floatx80, floatx80 );
|
|
int floatx80_lt( floatx80, floatx80 );
|
|
int floatx80_eq_signaling( floatx80, floatx80 );
|
|
int floatx80_le_quiet( floatx80, floatx80 );
|
|
int floatx80_lt_quiet( floatx80, floatx80 );
|
|
int floatx80_is_signaling_nan( floatx80 );
|
|
|
|
#endif
|
|
|
|
#ifdef FLOAT128
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE quadruple-precision conversion routines.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
int float128_to_int32( float128 );
|
|
int float128_to_int32_round_to_zero( float128 );
|
|
long long float128_to_int64( float128 );
|
|
long long float128_to_int64_round_to_zero( float128 );
|
|
float32 float128_to_float32( float128 );
|
|
float64 float128_to_float64( float128 );
|
|
#ifdef FLOATX80
|
|
floatx80 float128_to_floatx80( float128 );
|
|
#endif
|
|
|
|
/*
|
|
-------------------------------------------------------------------------------
|
|
Software IEC/IEEE quadruple-precision operations.
|
|
-------------------------------------------------------------------------------
|
|
*/
|
|
float128 float128_round_to_int( float128 );
|
|
float128 float128_add( float128, float128 );
|
|
float128 float128_sub( float128, float128 );
|
|
float128 float128_mul( float128, float128 );
|
|
float128 float128_div( float128, float128 );
|
|
float128 float128_rem( float128, float128 );
|
|
float128 float128_sqrt( float128 );
|
|
int float128_eq( float128, float128 );
|
|
int float128_le( float128, float128 );
|
|
int float128_lt( float128, float128 );
|
|
int float128_eq_signaling( float128, float128 );
|
|
int float128_le_quiet( float128, float128 );
|
|
int float128_lt_quiet( float128, float128 );
|
|
int float128_is_signaling_nan( float128 );
|
|
|
|
#endif
|