| 1 | /* Native implementation of soft float functions */
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| 2 | #include <math.h>
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| 3 |
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| 4 | #if (defined(_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS)
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| 5 | #include <ieeefp.h>
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| 6 | #define fabsf(f) ((float)fabs(f))
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| 7 | #elif defined(_MSC_VER)
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| 8 | #include <fpieee.h>
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| 9 | #define fabsf(f) ((float)fabs(f))
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| 10 | #else
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| 11 | #include <fenv.h>
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| 12 | #endif
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| 13 |
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| 14 | /*
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| 15 | * Define some C99-7.12.3 classification macros and
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| 16 | * some C99-.12.4 for Solaris systems OS less than 10,
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| 17 | * or Solaris 10 systems running GCC 3.x or less.
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| 18 | * Solaris 10 with GCC4 does not need these macros as they
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| 19 | * are defined in <iso/math_c99.h> with a compiler directive
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| 20 | */
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| 21 | #if defined(HOST_SOLARIS) && (( HOST_SOLARIS <= 9 ) || ( ( HOST_SOLARIS >= 10 ) && ( __GNUC__ <= 4) ))
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| 22 | /*
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| 23 | * C99 7.12.3 classification macros
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| 24 | * and
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| 25 | * C99 7.12.14 comparison macros
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| 26 | *
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| 27 | * ... do not work on Solaris 10 using GNU CC 3.4.x.
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| 28 | * Try to workaround the missing / broken C99 math macros.
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| 29 | */
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| 30 |
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| 31 | #define isnormal(x) (fpclass(x) >= FP_NZERO)
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| 32 | #define isgreater(x, y) ((!unordered(x, y)) && ((x) > (y)))
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| 33 | #define isgreaterequal(x, y) ((!unordered(x, y)) && ((x) >= (y)))
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| 34 | #define isless(x, y) ((!unordered(x, y)) && ((x) < (y)))
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| 35 | #define islessequal(x, y) ((!unordered(x, y)) && ((x) <= (y)))
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| 36 | #define isunordered(x,y) unordered(x, y)
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| 37 | #define isinf(x) ((fpclass(x) == FP_NINF) || (fpclass(x) == FP_PINF))
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| 38 |
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| 39 | #elif defined(_MSC_VER)
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| 40 | #include <float.h>
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| 41 | #define unordered(x1, x2) ((_fpclass(x1) <= 2) || (_fpclass(x2) <= 2))
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| 42 | #define isless(x, y) ((!unordered(x, y)) && ((x) < (y)))
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| 43 | #define islessequal(x, y) ((!unordered(x, y)) && ((x) <= (y)))
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| 44 | #define isunordered(x,y) unordered(x, y)
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| 45 | #endif
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| 46 |
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| 47 | typedef float float32;
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| 48 | typedef double float64;
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| 49 | #ifdef FLOATX80
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| 50 | typedef long double floatx80;
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| 51 | #endif
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| 52 |
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| 53 | typedef union {
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| 54 | float32 f;
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| 55 | uint32_t i;
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| 56 | } float32u;
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| 57 | typedef union {
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| 58 | float64 f;
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| 59 | uint64_t i;
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| 60 | } float64u;
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| 61 | #ifdef FLOATX80
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| 62 | typedef union {
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| 63 | floatx80 f;
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| 64 | struct {
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| 65 | uint64_t low;
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| 66 | uint16_t high;
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| 67 | } i;
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| 68 | } floatx80u;
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| 69 | #endif
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| 70 |
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| 71 | /*----------------------------------------------------------------------------
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| 72 | | Software IEC/IEEE floating-point rounding mode.
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| 73 | *----------------------------------------------------------------------------*/
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| 74 | #if (defined(_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS)
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| 75 | enum {
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| 76 | float_round_nearest_even = FP_RN,
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| 77 | float_round_down = FP_RM,
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| 78 | float_round_up = FP_RP,
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| 79 | float_round_to_zero = FP_RZ
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| 80 | };
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| 81 | #elif defined(__arm__)
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| 82 | enum {
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| 83 | float_round_nearest_even = 0,
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| 84 | float_round_down = 1,
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| 85 | float_round_up = 2,
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| 86 | float_round_to_zero = 3
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| 87 | };
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| 88 | #elif defined(_MSC_VER)
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| 89 | enum {
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| 90 | float_round_nearest_even = _FpRoundNearest,
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| 91 | float_round_down = _FpRoundMinusInfinity,
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| 92 | float_round_up = _FpRoundPlusInfinity,
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| 93 | float_round_to_zero = _FpRoundChopped
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| 94 | };
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| 95 | #else
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| 96 | enum {
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| 97 | float_round_nearest_even = FE_TONEAREST,
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| 98 | float_round_down = FE_DOWNWARD,
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| 99 | float_round_up = FE_UPWARD,
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| 100 | float_round_to_zero = FE_TOWARDZERO
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| 101 | };
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| 102 | #endif
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| 103 |
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| 104 | typedef struct float_status {
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| 105 | signed char float_rounding_mode;
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| 106 | #ifdef FLOATX80
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| 107 | signed char floatx80_rounding_precision;
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| 108 | #endif
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| 109 | } float_status;
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| 110 |
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| 111 | void set_float_rounding_mode(int val STATUS_PARAM);
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| 112 | #ifdef FLOATX80
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| 113 | void set_floatx80_rounding_precision(int val STATUS_PARAM);
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| 114 | #endif
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| 115 |
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| 116 | /*----------------------------------------------------------------------------
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| 117 | | Software IEC/IEEE integer-to-floating-point conversion routines.
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| 118 | *----------------------------------------------------------------------------*/
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| 119 | float32 int32_to_float32( int STATUS_PARAM);
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| 120 | float64 int32_to_float64( int STATUS_PARAM);
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| 121 | #ifdef FLOATX80
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| 122 | floatx80 int32_to_floatx80( int STATUS_PARAM);
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| 123 | #endif
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| 124 | #ifdef FLOAT128
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| 125 | float128 int32_to_float128( int STATUS_PARAM);
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| 126 | #endif
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| 127 | float32 int64_to_float32( int64_t STATUS_PARAM);
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| 128 | float64 int64_to_float64( int64_t STATUS_PARAM);
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| 129 | #ifdef FLOATX80
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| 130 | floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
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| 131 | #endif
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| 132 | #ifdef FLOAT128
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| 133 | float128 int64_to_float128( int64_t STATUS_PARAM);
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| 134 | #endif
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| 135 |
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| 136 | /*----------------------------------------------------------------------------
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| 137 | | Software IEC/IEEE single-precision conversion routines.
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| 138 | *----------------------------------------------------------------------------*/
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| 139 | int float32_to_int32( float32 STATUS_PARAM);
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| 140 | int float32_to_int32_round_to_zero( float32 STATUS_PARAM);
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| 141 | int64_t float32_to_int64( float32 STATUS_PARAM);
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| 142 | int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM);
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| 143 | float64 float32_to_float64( float32 STATUS_PARAM);
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| 144 | #ifdef FLOATX80
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| 145 | floatx80 float32_to_floatx80( float32 STATUS_PARAM);
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| 146 | #endif
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| 147 | #ifdef FLOAT128
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| 148 | float128 float32_to_float128( float32 STATUS_PARAM);
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| 149 | #endif
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| 150 |
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| 151 | /*----------------------------------------------------------------------------
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| 152 | | Software IEC/IEEE single-precision operations.
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| 153 | *----------------------------------------------------------------------------*/
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| 154 | float32 float32_round_to_int( float32 STATUS_PARAM);
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| 155 | INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
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| 156 | {
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| 157 | return a + b;
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| 158 | }
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| 159 | INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
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| 160 | {
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| 161 | return a - b;
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| 162 | }
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| 163 | INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
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| 164 | {
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| 165 | return a * b;
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| 166 | }
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| 167 | INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
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| 168 | {
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| 169 | return a / b;
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| 170 | }
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| 171 | float32 float32_rem( float32, float32 STATUS_PARAM);
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| 172 | float32 float32_sqrt( float32 STATUS_PARAM);
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| 173 | INLINE int float32_eq( float32 a, float32 b STATUS_PARAM)
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| 174 | {
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| 175 | return a == b;
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| 176 | }
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| 177 | INLINE int float32_le( float32 a, float32 b STATUS_PARAM)
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| 178 | {
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| 179 | return a <= b;
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| 180 | }
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| 181 | INLINE int float32_lt( float32 a, float32 b STATUS_PARAM)
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| 182 | {
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| 183 | return a < b;
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| 184 | }
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| 185 | INLINE int float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
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| 186 | {
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| 187 | return a <= b && a >= b;
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| 188 | }
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| 189 | INLINE int float32_le_quiet( float32 a, float32 b STATUS_PARAM)
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| 190 | {
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| 191 | return islessequal(a, b);
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| 192 | }
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| 193 | INLINE int float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
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| 194 | {
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| 195 | return isless(a, b);
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| 196 | }
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| 197 | INLINE int float32_unordered( float32 a, float32 b STATUS_PARAM)
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| 198 | {
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| 199 | return isunordered(a, b);
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| 200 |
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| 201 | }
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| 202 | int float32_compare( float32, float32 STATUS_PARAM );
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| 203 | int float32_compare_quiet( float32, float32 STATUS_PARAM );
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| 204 | int float32_is_signaling_nan( float32 );
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| 205 |
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| 206 | INLINE float32 float32_abs(float32 a)
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| 207 | {
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| 208 | return fabsf(a);
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| 209 | }
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| 210 |
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| 211 | INLINE float32 float32_chs(float32 a)
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| 212 | {
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| 213 | return -a;
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| 214 | }
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| 215 |
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| 216 | /*----------------------------------------------------------------------------
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| 217 | | Software IEC/IEEE double-precision conversion routines.
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| 218 | *----------------------------------------------------------------------------*/
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| 219 | int float64_to_int32( float64 STATUS_PARAM );
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| 220 | int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
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| 221 | int64_t float64_to_int64( float64 STATUS_PARAM );
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| 222 | int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
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| 223 | float32 float64_to_float32( float64 STATUS_PARAM );
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| 224 | #ifdef FLOATX80
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| 225 | floatx80 float64_to_floatx80( float64 STATUS_PARAM );
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| 226 | #endif
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| 227 | #ifdef FLOAT128
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| 228 | float128 float64_to_float128( float64 STATUS_PARAM );
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| 229 | #endif
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| 230 |
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| 231 | /*----------------------------------------------------------------------------
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| 232 | | Software IEC/IEEE double-precision operations.
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| 233 | *----------------------------------------------------------------------------*/
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| 234 | float64 float64_round_to_int( float64 STATUS_PARAM );
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| 235 | float64 float64_trunc_to_int( float64 STATUS_PARAM );
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| 236 | INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
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| 237 | {
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| 238 | return a + b;
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| 239 | }
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| 240 | INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
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| 241 | {
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| 242 | return a - b;
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| 243 | }
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| 244 | INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
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| 245 | {
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| 246 | return a * b;
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| 247 | }
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| 248 | INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
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| 249 | {
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| 250 | return a / b;
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| 251 | }
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| 252 | float64 float64_rem( float64, float64 STATUS_PARAM );
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| 253 | float64 float64_sqrt( float64 STATUS_PARAM );
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| 254 | INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
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| 255 | {
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| 256 | return a == b;
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| 257 | }
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| 258 | INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
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| 259 | {
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| 260 | return a <= b;
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| 261 | }
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| 262 | INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
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| 263 | {
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| 264 | return a < b;
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| 265 | }
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| 266 | INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
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| 267 | {
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| 268 | return a <= b && a >= b;
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| 269 | }
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| 270 | INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
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| 271 | {
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| 272 | return islessequal(a, b);
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| 273 | }
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| 274 | INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
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| 275 | {
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| 276 | return isless(a, b);
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| 277 |
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| 278 | }
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| 279 | INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
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| 280 | {
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| 281 | return isunordered(a, b);
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| 282 |
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| 283 | }
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| 284 | int float64_compare( float64, float64 STATUS_PARAM );
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| 285 | int float64_compare_quiet( float64, float64 STATUS_PARAM );
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| 286 | int float64_is_signaling_nan( float64 );
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| 287 | int float64_is_nan( float64 );
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| 288 |
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| 289 | INLINE float64 float64_abs(float64 a)
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| 290 | {
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| 291 | return fabs(a);
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| 292 | }
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| 293 |
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| 294 | INLINE float64 float64_chs(float64 a)
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| 295 | {
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| 296 | return -a;
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| 297 | }
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| 298 |
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| 299 | #ifdef FLOATX80
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| 300 |
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| 301 | /*----------------------------------------------------------------------------
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| 302 | | Software IEC/IEEE extended double-precision conversion routines.
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| 303 | *----------------------------------------------------------------------------*/
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| 304 | int floatx80_to_int32( floatx80 STATUS_PARAM );
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| 305 | int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
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| 306 | int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
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| 307 | int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
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| 308 | float32 floatx80_to_float32( floatx80 STATUS_PARAM );
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| 309 | float64 floatx80_to_float64( floatx80 STATUS_PARAM );
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| 310 | #ifdef FLOAT128
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| 311 | float128 floatx80_to_float128( floatx80 STATUS_PARAM );
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| 312 | #endif
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| 313 |
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| 314 | /*----------------------------------------------------------------------------
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| 315 | | Software IEC/IEEE extended double-precision operations.
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| 316 | *----------------------------------------------------------------------------*/
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| 317 | floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
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| 318 | INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
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| 319 | {
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| 320 | return a + b;
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| 321 | }
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| 322 | INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
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| 323 | {
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| 324 | return a - b;
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| 325 | }
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| 326 | INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
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| 327 | {
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| 328 | return a * b;
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| 329 | }
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| 330 | INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
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| 331 | {
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| 332 | return a / b;
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| 333 | }
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| 334 | floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
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| 335 | floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
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| 336 | INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
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| 337 | {
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| 338 | return a == b;
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| 339 | }
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| 340 | INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
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| 341 | {
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| 342 | return a <= b;
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| 343 | }
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| 344 | INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
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| 345 | {
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| 346 | return a < b;
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| 347 | }
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| 348 | INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
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| 349 | {
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| 350 | return a <= b && a >= b;
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| 351 | }
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| 352 | INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
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| 353 | {
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| 354 | return islessequal(a, b);
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| 355 | }
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| 356 | INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
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| 357 | {
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| 358 | return isless(a, b);
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| 359 |
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| 360 | }
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| 361 | INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
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| 362 | {
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| 363 | return isunordered(a, b);
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| 364 |
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| 365 | }
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| 366 | int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
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| 367 | int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
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| 368 | int floatx80_is_signaling_nan( floatx80 );
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| 369 |
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| 370 | INLINE floatx80 floatx80_abs(floatx80 a)
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| 371 | {
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| 372 | return fabsl(a);
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| 373 | }
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| 374 |
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| 375 | INLINE floatx80 floatx80_chs(floatx80 a)
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| 376 | {
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| 377 | return -a;
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| 378 | }
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| 379 | #endif
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