750afe93fd
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2204 c046a42c-6fe2-441c-8c8c-71466251a162
362 lines
10 KiB
C
362 lines
10 KiB
C
/* Native implementation of soft float functions */
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#include <math.h>
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#if (defined(_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS)
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#include <ieeefp.h>
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#define fabsf(f) ((float)fabs(f))
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#else
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#include <fenv.h>
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#endif
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/*
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* Define some C99-7.12.3 classification macros and
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* some C99-.12.4 for Solaris systems OS less than 10,
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* or Solaris 10 systems running GCC 3.x or less.
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* Solaris 10 with GCC4 does not need these macros as they
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* are defined in <iso/math_c99.h> with a compiler directive
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*/
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#if defined(HOST_SOLARIS) && (( HOST_SOLARIS <= 9 ) || ( ( HOST_SOLARIS >= 10 ) && ( __GNUC__ <= 4) ))
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/*
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* C99 7.12.3 classification macros
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* and
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* C99 7.12.14 comparison macros
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*
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* ... do not work on Solaris 10 using GNU CC 3.4.x.
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* Try to workaround the missing / broken C99 math macros.
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*/
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#define isnormal(x) (fpclass(x) >= FP_NZERO)
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#define isgreater(x, y) ((!unordered(x, y)) && ((x) > (y)))
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#define isgreaterequal(x, y) ((!unordered(x, y)) && ((x) >= (y)))
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#define isless(x, y) ((!unordered(x, y)) && ((x) < (y)))
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#define islessequal(x, y) ((!unordered(x, y)) && ((x) <= (y)))
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#define isunordered(x,y) unordered(x, y)
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#endif
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typedef float float32;
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typedef double float64;
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#ifdef FLOATX80
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typedef long double floatx80;
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#endif
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typedef union {
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float32 f;
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uint32_t i;
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} float32u;
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typedef union {
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float64 f;
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uint64_t i;
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} float64u;
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#ifdef FLOATX80
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typedef union {
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floatx80 f;
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struct {
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uint64_t low;
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uint16_t high;
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} i;
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} floatx80u;
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#endif
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/*----------------------------------------------------------------------------
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| Software IEC/IEEE floating-point rounding mode.
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*----------------------------------------------------------------------------*/
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#if (defined(_BSD) && !defined(__APPLE__)) || defined(HOST_SOLARIS)
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enum {
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float_round_nearest_even = FP_RN,
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float_round_down = FP_RM,
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float_round_up = FP_RP,
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float_round_to_zero = FP_RZ
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};
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#elif defined(__arm__)
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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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#else
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enum {
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float_round_nearest_even = FE_TONEAREST,
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float_round_down = FE_DOWNWARD,
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float_round_up = FE_UPWARD,
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float_round_to_zero = FE_TOWARDZERO
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};
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#endif
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typedef struct float_status {
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signed char float_rounding_mode;
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#ifdef FLOATX80
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signed char floatx80_rounding_precision;
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#endif
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} float_status;
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void set_float_rounding_mode(int val STATUS_PARAM);
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#ifdef FLOATX80
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void set_floatx80_rounding_precision(int val STATUS_PARAM);
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#endif
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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 STATUS_PARAM);
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float64 int32_to_float64( int STATUS_PARAM);
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#ifdef FLOATX80
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floatx80 int32_to_floatx80( int STATUS_PARAM);
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#endif
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#ifdef FLOAT128
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float128 int32_to_float128( int STATUS_PARAM);
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#endif
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float32 int64_to_float32( int64_t STATUS_PARAM);
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float64 int64_to_float64( int64_t STATUS_PARAM);
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#ifdef FLOATX80
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floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
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#endif
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#ifdef FLOAT128
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float128 int64_to_float128( int64_t STATUS_PARAM);
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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 STATUS_PARAM);
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int float32_to_int32_round_to_zero( float32 STATUS_PARAM);
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int64_t float32_to_int64( float32 STATUS_PARAM);
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int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM);
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float64 float32_to_float64( float32 STATUS_PARAM);
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#ifdef FLOATX80
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floatx80 float32_to_floatx80( float32 STATUS_PARAM);
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#endif
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#ifdef FLOAT128
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float128 float32_to_float128( float32 STATUS_PARAM);
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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 STATUS_PARAM);
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INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
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{
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return a + b;
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}
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INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
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{
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return a - b;
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}
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INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
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{
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return a * b;
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}
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INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
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{
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return a / b;
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}
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float32 float32_rem( float32, float32 STATUS_PARAM);
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float32 float32_sqrt( float32 STATUS_PARAM);
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INLINE int float32_eq( float32 a, float32 b STATUS_PARAM)
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{
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return a == b;
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}
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INLINE int float32_le( float32 a, float32 b STATUS_PARAM)
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{
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return a <= b;
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}
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INLINE int float32_lt( float32 a, float32 b STATUS_PARAM)
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{
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return a < b;
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}
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INLINE int float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
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{
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return a <= b && a >= b;
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}
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INLINE int float32_le_quiet( float32 a, float32 b STATUS_PARAM)
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{
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return islessequal(a, b);
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}
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INLINE int float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
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{
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return isless(a, b);
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}
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INLINE int float32_unordered( float32 a, float32 b STATUS_PARAM)
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{
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return isunordered(a, b);
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}
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int float32_compare( float32, float32 STATUS_PARAM );
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int float32_compare_quiet( float32, float32 STATUS_PARAM );
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int float32_is_signaling_nan( float32 );
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INLINE float32 float32_abs(float32 a)
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{
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return fabsf(a);
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}
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INLINE float32 float32_chs(float32 a)
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{
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return -a;
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}
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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 STATUS_PARAM );
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int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
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int64_t float64_to_int64( float64 STATUS_PARAM );
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int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
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float32 float64_to_float32( float64 STATUS_PARAM );
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#ifdef FLOATX80
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floatx80 float64_to_floatx80( float64 STATUS_PARAM );
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#endif
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#ifdef FLOAT128
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float128 float64_to_float128( float64 STATUS_PARAM );
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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 STATUS_PARAM );
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float64 float64_trunc_to_int( float64 STATUS_PARAM );
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INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
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{
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return a + b;
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}
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INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
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{
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return a - b;
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}
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INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
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{
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return a * b;
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}
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INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
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{
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return a / b;
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}
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float64 float64_rem( float64, float64 STATUS_PARAM );
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float64 float64_sqrt( float64 STATUS_PARAM );
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INLINE int float64_eq( float64 a, float64 b STATUS_PARAM)
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{
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return a == b;
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}
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INLINE int float64_le( float64 a, float64 b STATUS_PARAM)
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{
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return a <= b;
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}
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INLINE int float64_lt( float64 a, float64 b STATUS_PARAM)
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{
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return a < b;
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}
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INLINE int float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
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{
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return a <= b && a >= b;
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}
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INLINE int float64_le_quiet( float64 a, float64 b STATUS_PARAM)
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{
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return islessequal(a, b);
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}
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INLINE int float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
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{
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return isless(a, b);
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}
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INLINE int float64_unordered( float64 a, float64 b STATUS_PARAM)
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{
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return isunordered(a, b);
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}
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int float64_compare( float64, float64 STATUS_PARAM );
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int float64_compare_quiet( float64, float64 STATUS_PARAM );
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int float64_is_signaling_nan( float64 );
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int float64_is_nan( float64 );
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INLINE float64 float64_abs(float64 a)
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{
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return fabs(a);
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}
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INLINE float64 float64_chs(float64 a)
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{
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return -a;
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}
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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 STATUS_PARAM );
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int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
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int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
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int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
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float32 floatx80_to_float32( floatx80 STATUS_PARAM );
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float64 floatx80_to_float64( floatx80 STATUS_PARAM );
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#ifdef FLOAT128
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float128 floatx80_to_float128( floatx80 STATUS_PARAM );
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#endif
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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 STATUS_PARAM );
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INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return a + b;
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}
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INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return a - b;
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}
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INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return a * b;
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}
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INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return a / b;
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}
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floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
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floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
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INLINE int floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return a == b;
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}
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INLINE int floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return a <= b;
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}
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INLINE int floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return a < b;
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}
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INLINE int floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return a <= b && a >= b;
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}
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INLINE int floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return islessequal(a, b);
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}
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INLINE int floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return isless(a, b);
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}
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INLINE int floatx80_unordered( floatx80 a, floatx80 b STATUS_PARAM)
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{
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return isunordered(a, b);
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}
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int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
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int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
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int floatx80_is_signaling_nan( floatx80 );
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INLINE floatx80 floatx80_abs(floatx80 a)
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{
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return fabsl(a);
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}
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INLINE floatx80 floatx80_chs(floatx80 a)
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{
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return -a;
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}
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#endif
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