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Diffstat (limited to 'fpu/softfloat.h')
| -rw-r--r-- | fpu/softfloat.h | 444 |
1 files changed, 0 insertions, 444 deletions
diff --git a/fpu/softfloat.h b/fpu/softfloat.h deleted file mode 100644 index 5f95d06..0000000 --- a/fpu/softfloat.h +++ /dev/null @@ -1,444 +0,0 @@ -/*============================================================================ - -This C header file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic -Package, Release 2b. - -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://www.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 ALL LOSSES, -COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE -EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE -INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR -OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE. - -Derivative works are acceptable, even for commercial purposes, so long as -(1) the source code for the derivative work includes prominent notice that -the work is derivative, and (2) the source code includes prominent notice with -these four paragraphs for those parts of this code that are retained. - -=============================================================================*/ - -#ifndef SOFTFLOAT_H -#define SOFTFLOAT_H - -#if defined(HOST_SOLARIS) && defined(NEEDS_LIBSUNMATH) -#include <sunmath.h> -#endif - -#include <inttypes.h> -#include "config.h" - -/*---------------------------------------------------------------------------- -| Each of the following `typedef's defines the most convenient type that holds -| integers of at least as many bits as specified. For example, `uint8' should -| be the most convenient type that can hold unsigned integers of as many as -| 8 bits. The `flag' type must be able to hold either a 0 or 1. For most -| implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed -| to the same as `int'. -*----------------------------------------------------------------------------*/ -typedef uint8_t flag; -typedef uint8_t uint8; -typedef int8_t int8; -typedef int uint16; -typedef int int16; -typedef unsigned int uint32; -typedef signed int int32; -typedef uint64_t uint64; -typedef int64_t int64; - -/*---------------------------------------------------------------------------- -| Each of the following `typedef's defines a type that holds integers -| of _exactly_ the number of bits specified. For instance, for most -| implementation of C, `bits16' and `sbits16' should be `typedef'ed to -| `unsigned short int' and `signed short int' (or `short int'), respectively. -*----------------------------------------------------------------------------*/ -typedef uint8_t bits8; -typedef int8_t sbits8; -typedef uint16_t bits16; -typedef int16_t sbits16; -typedef uint32_t bits32; -typedef int32_t sbits32; -typedef uint64_t bits64; -typedef int64_t sbits64; - -#define LIT64( a ) a##LL -#define INLINE static inline - -/*---------------------------------------------------------------------------- -| 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'. -*----------------------------------------------------------------------------*/ -#ifdef CONFIG_SOFTFLOAT -/* bit exact soft float support */ -#define FLOATX80 -#define FLOAT128 -#else -/* native float support */ -#if (defined(__i386__) || defined(__x86_64__)) && !defined(_BSD) -#define FLOATX80 -#endif -#endif /* !CONFIG_SOFTFLOAT */ - -#define STATUS_PARAM , float_status *status -#define STATUS(field) status->field -#define STATUS_VAR , status - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE floating-point ordering relations -*----------------------------------------------------------------------------*/ -enum { - float_relation_less = -1, - float_relation_equal = 0, - float_relation_greater = 1, - float_relation_unordered = 2 -}; - -#ifdef CONFIG_SOFTFLOAT -/*---------------------------------------------------------------------------- -| Software IEC/IEEE floating-point types. -*----------------------------------------------------------------------------*/ -/* Use structures for soft-float types. This prevents accidentally mixing - them with native int/float types. A sufficiently clever compiler and - sane ABI should be able to see though these structs. However - x86/gcc 3.x seems to struggle a bit, so leave them disabled by default. */ -//#define USE_SOFTFLOAT_STRUCT_TYPES -#ifdef USE_SOFTFLOAT_STRUCT_TYPES -typedef struct { - uint32_t v; -} float32; -/* The cast ensures an error if the wrong type is passed. */ -#define float32_val(x) (((float32)(x)).v) -#define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; }) -typedef struct { - uint64_t v; -} float64; -#define float64_val(x) (((float64)(x)).v) -#define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; }) -#else -typedef uint32_t float32; -typedef uint64_t float64; -#define float32_val(x) (x) -#define float64_val(x) (x) -#define make_float32(x) (x) -#define make_float64(x) (x) -#endif -#ifdef FLOATX80 -typedef struct { - uint64_t low; - uint16_t high; -} floatx80; -#endif -#ifdef FLOAT128 -typedef struct { -#ifdef WORDS_BIGENDIAN - uint64_t high, low; -#else - uint64_t low, high; -#endif -} float128; -#endif - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE floating-point underflow tininess-detection mode. -*----------------------------------------------------------------------------*/ -enum { - float_tininess_after_rounding = 0, - float_tininess_before_rounding = 1 -}; - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE floating-point rounding mode. -*----------------------------------------------------------------------------*/ -enum { - float_round_nearest_even = 0, - float_round_down = 1, - float_round_up = 2, - float_round_to_zero = 3 -}; - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE floating-point exception flags. -*----------------------------------------------------------------------------*/ -enum { - float_flag_invalid = 1, - float_flag_divbyzero = 4, - float_flag_overflow = 8, - float_flag_underflow = 16, - float_flag_inexact = 32 -}; - -typedef struct float_status { - signed char float_detect_tininess; - signed char float_rounding_mode; - signed char float_exception_flags; -#ifdef FLOATX80 - signed char floatx80_rounding_precision; -#endif -} float_status; - -void set_float_rounding_mode(int val STATUS_PARAM); -void set_float_exception_flags(int val STATUS_PARAM); -INLINE int get_float_exception_flags(float_status *status) -{ - return STATUS(float_exception_flags); -} -#ifdef FLOATX80 -void set_floatx80_rounding_precision(int val STATUS_PARAM); -#endif - -/*---------------------------------------------------------------------------- -| Routine to raise any or all of the software IEC/IEEE floating-point -| exception flags. -*----------------------------------------------------------------------------*/ -void float_raise( int8 flags STATUS_PARAM); - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE integer-to-floating-point conversion routines. -*----------------------------------------------------------------------------*/ -float32 int32_to_float32( int STATUS_PARAM ); -float64 int32_to_float64( int STATUS_PARAM ); -float32 uint32_to_float32( unsigned int STATUS_PARAM ); -float64 uint32_to_float64( unsigned int STATUS_PARAM ); -#ifdef FLOATX80 -floatx80 int32_to_floatx80( int STATUS_PARAM ); -#endif -#ifdef FLOAT128 -float128 int32_to_float128( int STATUS_PARAM ); -#endif -float32 int64_to_float32( int64_t STATUS_PARAM ); -float32 uint64_to_float32( uint64_t STATUS_PARAM ); -float64 int64_to_float64( int64_t STATUS_PARAM ); -float64 uint64_to_float64( uint64_t STATUS_PARAM ); -#ifdef FLOATX80 -floatx80 int64_to_floatx80( int64_t STATUS_PARAM ); -#endif -#ifdef FLOAT128 -float128 int64_to_float128( int64_t STATUS_PARAM ); -#endif - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE single-precision conversion routines. -*----------------------------------------------------------------------------*/ -int float32_to_int32( float32 STATUS_PARAM ); -int float32_to_int32_round_to_zero( float32 STATUS_PARAM ); -unsigned int float32_to_uint32( float32 STATUS_PARAM ); -unsigned int float32_to_uint32_round_to_zero( float32 STATUS_PARAM ); -int64_t float32_to_int64( float32 STATUS_PARAM ); -int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM ); -float64 float32_to_float64( float32 STATUS_PARAM ); -#ifdef FLOATX80 -floatx80 float32_to_floatx80( float32 STATUS_PARAM ); -#endif -#ifdef FLOAT128 -float128 float32_to_float128( float32 STATUS_PARAM ); -#endif - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE single-precision operations. -*----------------------------------------------------------------------------*/ -float32 float32_round_to_int( float32 STATUS_PARAM ); -float32 float32_add( float32, float32 STATUS_PARAM ); -float32 float32_sub( float32, float32 STATUS_PARAM ); -float32 float32_mul( float32, float32 STATUS_PARAM ); -float32 float32_div( float32, float32 STATUS_PARAM ); -float32 float32_rem( float32, float32 STATUS_PARAM ); -float32 float32_sqrt( float32 STATUS_PARAM ); -int float32_eq( float32, float32 STATUS_PARAM ); -int float32_le( float32, float32 STATUS_PARAM ); -int float32_lt( float32, float32 STATUS_PARAM ); -int float32_eq_signaling( float32, float32 STATUS_PARAM ); -int float32_le_quiet( float32, float32 STATUS_PARAM ); -int float32_lt_quiet( float32, float32 STATUS_PARAM ); -int float32_compare( float32, float32 STATUS_PARAM ); -int float32_compare_quiet( float32, float32 STATUS_PARAM ); -int float32_is_nan( float32 ); -int float32_is_signaling_nan( float32 ); -float32 float32_scalbn( float32, int STATUS_PARAM ); - -INLINE float32 float32_abs(float32 a) -{ - return make_float32(float32_val(a) & 0x7fffffff); -} - -INLINE float32 float32_chs(float32 a) -{ - return make_float32(float32_val(a) ^ 0x80000000); -} - -#define float32_zero make_float32(0) - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE double-precision conversion routines. -*----------------------------------------------------------------------------*/ -int float64_to_int32( float64 STATUS_PARAM ); -int float64_to_int32_round_to_zero( float64 STATUS_PARAM ); -unsigned int float64_to_uint32( float64 STATUS_PARAM ); -unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM ); -int64_t float64_to_int64( float64 STATUS_PARAM ); -int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM ); -uint64_t float64_to_uint64 (float64 a STATUS_PARAM); -uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM); -float32 float64_to_float32( float64 STATUS_PARAM ); -#ifdef FLOATX80 -floatx80 float64_to_floatx80( float64 STATUS_PARAM ); -#endif -#ifdef FLOAT128 -float128 float64_to_float128( float64 STATUS_PARAM ); -#endif - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE double-precision operations. -*----------------------------------------------------------------------------*/ -float64 float64_round_to_int( float64 STATUS_PARAM ); -float64 float64_trunc_to_int( float64 STATUS_PARAM ); -float64 float64_add( float64, float64 STATUS_PARAM ); -float64 float64_sub( float64, float64 STATUS_PARAM ); -float64 float64_mul( float64, float64 STATUS_PARAM ); -float64 float64_div( float64, float64 STATUS_PARAM ); -float64 float64_rem( float64, float64 STATUS_PARAM ); -float64 float64_sqrt( float64 STATUS_PARAM ); -int float64_eq( float64, float64 STATUS_PARAM ); -int float64_le( float64, float64 STATUS_PARAM ); -int float64_lt( float64, float64 STATUS_PARAM ); -int float64_eq_signaling( float64, float64 STATUS_PARAM ); -int float64_le_quiet( float64, float64 STATUS_PARAM ); -int float64_lt_quiet( float64, float64 STATUS_PARAM ); -int float64_compare( float64, float64 STATUS_PARAM ); -int float64_compare_quiet( float64, float64 STATUS_PARAM ); -int float64_is_nan( float64 a ); -int float64_is_signaling_nan( float64 ); -float64 float64_scalbn( float64, int STATUS_PARAM ); - -INLINE float64 float64_abs(float64 a) -{ - return make_float64(float64_val(a) & 0x7fffffffffffffffLL); -} - -INLINE float64 float64_chs(float64 a) -{ - return make_float64(float64_val(a) ^ 0x8000000000000000LL); -} - -#define float64_zero make_float64(0) - -#ifdef FLOATX80 - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE extended double-precision conversion routines. -*----------------------------------------------------------------------------*/ -int floatx80_to_int32( floatx80 STATUS_PARAM ); -int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM ); -int64_t floatx80_to_int64( floatx80 STATUS_PARAM ); -int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM ); -float32 floatx80_to_float32( floatx80 STATUS_PARAM ); -float64 floatx80_to_float64( floatx80 STATUS_PARAM ); -#ifdef FLOAT128 -float128 floatx80_to_float128( floatx80 STATUS_PARAM ); -#endif - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE extended double-precision operations. -*----------------------------------------------------------------------------*/ -floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM ); -floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM ); -floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM ); -floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM ); -floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM ); -floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM ); -floatx80 floatx80_sqrt( floatx80 STATUS_PARAM ); -int floatx80_eq( floatx80, floatx80 STATUS_PARAM ); -int floatx80_le( floatx80, floatx80 STATUS_PARAM ); -int floatx80_lt( floatx80, floatx80 STATUS_PARAM ); -int floatx80_eq_signaling( floatx80, floatx80 STATUS_PARAM ); -int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM ); -int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM ); -int floatx80_is_nan( floatx80 ); -int floatx80_is_signaling_nan( floatx80 ); -floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM ); - -INLINE floatx80 floatx80_abs(floatx80 a) -{ - a.high &= 0x7fff; - return a; -} - -INLINE floatx80 floatx80_chs(floatx80 a) -{ - a.high ^= 0x8000; - return a; -} - -#endif - -#ifdef FLOAT128 - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE quadruple-precision conversion routines. -*----------------------------------------------------------------------------*/ -int float128_to_int32( float128 STATUS_PARAM ); -int float128_to_int32_round_to_zero( float128 STATUS_PARAM ); -int64_t float128_to_int64( float128 STATUS_PARAM ); -int64_t float128_to_int64_round_to_zero( float128 STATUS_PARAM ); -float32 float128_to_float32( float128 STATUS_PARAM ); -float64 float128_to_float64( float128 STATUS_PARAM ); -#ifdef FLOATX80 -floatx80 float128_to_floatx80( float128 STATUS_PARAM ); -#endif - -/*---------------------------------------------------------------------------- -| Software IEC/IEEE quadruple-precision operations. -*----------------------------------------------------------------------------*/ -float128 float128_round_to_int( float128 STATUS_PARAM ); -float128 float128_add( float128, float128 STATUS_PARAM ); -float128 float128_sub( float128, float128 STATUS_PARAM ); -float128 float128_mul( float128, float128 STATUS_PARAM ); -float128 float128_div( float128, float128 STATUS_PARAM ); -float128 float128_rem( float128, float128 STATUS_PARAM ); -float128 float128_sqrt( float128 STATUS_PARAM ); -int float128_eq( float128, float128 STATUS_PARAM ); -int float128_le( float128, float128 STATUS_PARAM ); -int float128_lt( float128, float128 STATUS_PARAM ); -int float128_eq_signaling( float128, float128 STATUS_PARAM ); -int float128_le_quiet( float128, float128 STATUS_PARAM ); -int float128_lt_quiet( float128, float128 STATUS_PARAM ); -int float128_compare( float128, float128 STATUS_PARAM ); -int float128_compare_quiet( float128, float128 STATUS_PARAM ); -int float128_is_nan( float128 ); -int float128_is_signaling_nan( float128 ); -float128 float128_scalbn( float128, int STATUS_PARAM ); - -INLINE float128 float128_abs(float128 a) -{ - a.high &= 0x7fffffffffffffffLL; - return a; -} - -INLINE float128 float128_chs(float128 a) -{ - a.high ^= 0x8000000000000000LL; - return a; -} - -#endif - -#else /* CONFIG_SOFTFLOAT */ - -#include "softfloat-native.h" - -#endif /* !CONFIG_SOFTFLOAT */ - -#endif /* !SOFTFLOAT_H */ |