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Diffstat (limited to 'src/recompiler/fpu/softfloat.h')
| -rw-r--r-- | src/recompiler/fpu/softfloat.h | 537 |
1 files changed, 537 insertions, 0 deletions
diff --git a/src/recompiler/fpu/softfloat.h b/src/recompiler/fpu/softfloat.h new file mode 100644 index 00000000..c209cd97 --- /dev/null +++ b/src/recompiler/fpu/softfloat.h @@ -0,0 +1,537 @@ +/*============================================================================ + +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 + +#ifdef VBOX +#include <VBox/types.h> +#endif + +#if defined(CONFIG_SOLARIS) && defined(CONFIG_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; +#ifndef _AIX +typedef int uint16; +typedef int int16; +#endif +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(CONFIG_BSD) || defined(VBOX)) /** @todo VBOX: not correct on windows */ +#define FLOATX80 +#endif +#endif /* !CONFIG_SOFTFLOAT */ + +#if defined(VBOX) && (!defined(FLOATX80) || defined(CONFIG_SOFTFLOAT)) +# error misconfigured +#endif + +#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 HOST_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 + flag flush_to_zero; + flag default_nan_mode; +} float_status; + +void set_float_rounding_mode(int val STATUS_PARAM); +void set_float_exception_flags(int val STATUS_PARAM); +INLINE void set_flush_to_zero(flag val STATUS_PARAM) +{ + STATUS(flush_to_zero) = val; +} +INLINE void set_default_nan_mode(flag val STATUS_PARAM) +{ + STATUS(default_nan_mode) = val; +} +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 half-precision conversion routines. +*----------------------------------------------------------------------------*/ +bits16 float32_to_float16( float32, flag STATUS_PARAM ); +float32 float16_to_float32( bits16, flag STATUS_PARAM ); + +/*---------------------------------------------------------------------------- +| 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 ); +float32 float32_exp2( float32 STATUS_PARAM ); +float32 float32_log2( 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); +} + +INLINE int float32_is_infinity(float32 a) +{ + return (float32_val(a) & 0x7fffffff) == 0x7f800000; +} + +INLINE int float32_is_neg(float32 a) +{ + return float32_val(a) >> 31; +} + +INLINE int float32_is_zero(float32 a) +{ + return (float32_val(a) & 0x7fffffff) == 0; +} + +#define float32_zero make_float32(0) +#define float32_one make_float32(0x3f800000) +#define float32_ln2 make_float32(0x3f317218) + +/*---------------------------------------------------------------------------- +| 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 ); +float64 float64_log2( 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); +} + +INLINE int float64_is_infinity(float64 a) +{ + return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL; +} + +INLINE int float64_is_neg(float64 a) +{ + return float64_val(a) >> 63; +} + +INLINE int float64_is_zero(float64 a) +{ + return (float64_val(a) & 0x7fffffffffffffffLL) == 0; +} + +#define float64_zero make_float64(0) +#define float64_one make_float64(0x3ff0000000000000LL) +#define float64_ln2 make_float64(0x3fe62e42fefa39efLL) + +#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; +} + +INLINE int floatx80_is_infinity(floatx80 a) +{ + return (a.high & 0x7fff) == 0x7fff && a.low == 0; +} + +INLINE int floatx80_is_neg(floatx80 a) +{ + return a.high >> 15; +} + +INLINE int floatx80_is_zero(floatx80 a) +{ + return (a.high & 0x7fff) == 0 && a.low == 0; +} + +#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; +} + +INLINE int float128_is_infinity(float128 a) +{ + return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0; +} + +INLINE int float128_is_neg(float128 a) +{ + return a.high >> 63; +} + +INLINE int float128_is_zero(float128 a) +{ + return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0; +} + +#endif + +#else /* CONFIG_SOFTFLOAT */ + +#include "softfloat-native.h" + +#endif /* !CONFIG_SOFTFLOAT */ + +#endif /* !SOFTFLOAT_H */ |