root / fpu / softfloat-native.c @ 63a654bb
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/* Native implementation of soft float functions. Only a single status
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context is supported */
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#include "softfloat.h" |
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#include <math.h> |
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void set_float_rounding_mode(int val STATUS_PARAM) |
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{
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STATUS(float_rounding_mode) = val; |
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#if defined(_BSD) && !defined(__APPLE__) || (defined(HOST_SOLARIS) && HOST_SOLARIS < 10) |
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fpsetround(val); |
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#elif defined(__arm__)
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/* nothing to do */
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#else
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fesetround(val); |
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#endif
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} |
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#ifdef FLOATX80
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void set_floatx80_rounding_precision(int val STATUS_PARAM) |
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{
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STATUS(floatx80_rounding_precision) = val; |
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} |
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#endif
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#if defined(_BSD) || (defined(HOST_SOLARIS) && HOST_SOLARIS < 10) |
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#define lrint(d) ((int32_t)rint(d))
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#define llrint(d) ((int64_t)rint(d))
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#define lrintf(f) ((int32_t)rint(f))
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#define llrintf(f) ((int64_t)rint(f))
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#define sqrtf(f) ((float)sqrt(f)) |
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#define remainderf(fa, fb) ((float)remainder(fa, fb)) |
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#define rintf(f) ((float)rint(f)) |
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#endif
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#if defined(__powerpc__)
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/* correct (but slow) PowerPC rint() (glibc version is incorrect) */
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double qemu_rint(double x) |
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{
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double y = 4503599627370496.0; |
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if (fabs(x) >= y)
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return x;
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if (x < 0) |
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y = -y; |
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y = (x + y) - y; |
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if (y == 0.0) |
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y = copysign(y, x); |
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return y;
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} |
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#define rint qemu_rint
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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 v STATUS_PARAM)
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{
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return (float32)v;
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} |
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float64 int32_to_float64(int v STATUS_PARAM)
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{
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return (float64)v;
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} |
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#ifdef FLOATX80
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floatx80 int32_to_floatx80(int v STATUS_PARAM)
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{
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return (floatx80)v;
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} |
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#endif
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float32 int64_to_float32( int64_t v STATUS_PARAM) |
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{
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return (float32)v;
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} |
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float64 int64_to_float64( int64_t v STATUS_PARAM) |
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{
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return (float64)v;
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} |
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#ifdef FLOATX80
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floatx80 int64_to_floatx80( int64_t v STATUS_PARAM) |
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{
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return (floatx80)v;
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} |
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#endif
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/* XXX: this code implements the x86 behaviour, not the IEEE one. */
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#if HOST_LONG_BITS == 32 |
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static inline int long_to_int32(long a) |
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{
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return a;
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} |
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#else
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static inline int long_to_int32(long a) |
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{
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if (a != (int32_t)a)
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a = 0x80000000;
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return a;
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} |
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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 a STATUS_PARAM)
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{
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return long_to_int32(lrintf(a));
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} |
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int float32_to_int32_round_to_zero( float32 a STATUS_PARAM)
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{
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return (int)a; |
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} |
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int64_t float32_to_int64( float32 a STATUS_PARAM) |
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{
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return llrintf(a);
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} |
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int64_t float32_to_int64_round_to_zero( float32 a STATUS_PARAM) |
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{
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return (int64_t)a;
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} |
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float64 float32_to_float64( float32 a STATUS_PARAM) |
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{
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return a;
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} |
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#ifdef FLOATX80
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floatx80 float32_to_floatx80( float32 a STATUS_PARAM) |
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{
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return a;
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} |
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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 a STATUS_PARAM) |
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{
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return rintf(a);
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} |
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float32 float32_rem( float32 a, float32 b STATUS_PARAM) |
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{
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return remainderf(a, b);
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} |
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float32 float32_sqrt( float32 a STATUS_PARAM) |
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{
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return sqrtf(a);
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} |
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int float32_compare( float32 a, float32 b STATUS_PARAM )
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{
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if (a < b) {
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return -1; |
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} else if (a == b) { |
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return 0; |
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} else if (a > b) { |
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return 1; |
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} else {
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return 2; |
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} |
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} |
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int float32_compare_quiet( float32 a, float32 b STATUS_PARAM )
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{
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if (isless(a, b)) {
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return -1; |
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} else if (a == b) { |
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return 0; |
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} else if (isgreater(a, b)) { |
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return 1; |
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} else {
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return 2; |
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} |
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} |
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int float32_is_signaling_nan( float32 a1)
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{
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float32u u; |
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uint32_t a; |
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u.f = a1; |
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a = u.i; |
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return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF ); |
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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 a STATUS_PARAM)
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{
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return long_to_int32(lrint(a));
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} |
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int float64_to_int32_round_to_zero( float64 a STATUS_PARAM)
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{
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return (int)a; |
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} |
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int64_t float64_to_int64( float64 a STATUS_PARAM) |
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{
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return llrint(a);
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} |
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int64_t float64_to_int64_round_to_zero( float64 a STATUS_PARAM) |
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{
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return (int64_t)a;
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} |
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float32 float64_to_float32( float64 a STATUS_PARAM) |
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{
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return a;
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} |
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#ifdef FLOATX80
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floatx80 float64_to_floatx80( float64 a STATUS_PARAM) |
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{
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return a;
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} |
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#endif
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#ifdef FLOAT128
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float128 float64_to_float128( float64 a STATUS_PARAM) |
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{
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return a;
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} |
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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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#if ( defined(__sun__) && ( HOST_SOLARIS < 10 )) |
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static inline float64 trunc(float64 x) |
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{
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return x < 0 ? -floor(-x) : floor(x); |
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} |
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#endif
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float64 float64_trunc_to_int( float64 a STATUS_PARAM ) |
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{
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return trunc(a);
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} |
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float64 float64_round_to_int( float64 a STATUS_PARAM ) |
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{
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#if defined(__arm__)
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switch(STATUS(float_rounding_mode)) {
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default:
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case float_round_nearest_even:
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asm("rndd %0, %1" : "=f" (a) : "f"(a)); |
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break;
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case float_round_down:
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asm("rnddm %0, %1" : "=f" (a) : "f"(a)); |
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break;
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case float_round_up:
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asm("rnddp %0, %1" : "=f" (a) : "f"(a)); |
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break;
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case float_round_to_zero:
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asm("rnddz %0, %1" : "=f" (a) : "f"(a)); |
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break;
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} |
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#else
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return rint(a);
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#endif
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} |
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float64 float64_rem( float64 a, float64 b STATUS_PARAM) |
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{
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return remainder(a, b);
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} |
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float64 float64_sqrt( float64 a STATUS_PARAM) |
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{
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return sqrt(a);
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} |
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int float64_compare( float64 a, float64 b STATUS_PARAM )
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{
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if (a < b) {
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return -1; |
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} else if (a == b) { |
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return 0; |
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} else if (a > b) { |
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return 1; |
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} else {
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return 2; |
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} |
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} |
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int float64_compare_quiet( float64 a, float64 b STATUS_PARAM )
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{
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if (isless(a, b)) {
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return -1; |
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} else if (a == b) { |
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return 0; |
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} else if (isgreater(a, b)) { |
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return 1; |
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} else {
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return 2; |
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} |
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} |
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int float64_is_signaling_nan( float64 a1)
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{
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float64u u; |
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uint64_t a; |
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u.f = a1; |
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a = u.i; |
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return
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( ( ( a>>51 ) & 0xFFF ) == 0xFFE ) |
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&& ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
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} |
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int float64_is_nan( float64 a1 )
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{
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float64u u; |
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uint64_t a; |
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u.f = a1; |
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a = u.i; |
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return ( LIT64( 0xFFE0000000000000 ) < (bits64) ( a<<1 ) ); |
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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 a STATUS_PARAM)
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{
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return long_to_int32(lrintl(a));
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} |
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int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM)
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{
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return (int)a; |
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} |
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int64_t floatx80_to_int64( floatx80 a STATUS_PARAM) |
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{
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return llrintl(a);
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} |
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int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM) |
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{
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return (int64_t)a;
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} |
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float32 floatx80_to_float32( floatx80 a STATUS_PARAM) |
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{
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return a;
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} |
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float64 floatx80_to_float64( floatx80 a STATUS_PARAM) |
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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 extended double-precision operations.
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*----------------------------------------------------------------------------*/
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floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM) |
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{
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return rintl(a);
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} |
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floatx80 floatx80_rem( floatx80 a, floatx80 b STATUS_PARAM) |
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{
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return remainderl(a, b);
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} |
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floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM) |
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{
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return sqrtl(a);
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} |
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int floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM )
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{
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if (a < b) {
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return -1; |
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} else if (a == b) { |
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return 0; |
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} else if (a > b) { |
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return 1; |
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} else {
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return 2; |
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} |
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} |
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int floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM )
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{
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if (isless(a, b)) {
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return -1; |
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} else if (a == b) { |
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return 0; |
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} else if (isgreater(a, b)) { |
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return 1; |
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} else {
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return 2; |
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} |
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} |
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int floatx80_is_signaling_nan( floatx80 a1)
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{
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floatx80u u; |
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u.f = a1; |
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return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 ); |
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} |
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#endif
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