root / fpu / softfloat-native.c @ d7585251
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| 1 |
/* Native implementation of soft float functions. Only a single status
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|---|---|
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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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|
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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(HOST_BSD) && !defined(__APPLE__) || \
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(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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|
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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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|
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#if defined(HOST_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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#if !defined(__sparc__) && defined(HOST_SOLARIS) && HOST_SOLARIS < 10 |
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extern long double rintl(long double); |
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extern long double scalbnl(long double, int); |
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|
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long long |
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llrintl(long double x) { |
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return ((long long) rintl(x)); |
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} |
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|
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long
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lrintl(long double x) { |
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return ((long) rintl(x)); |
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} |
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|
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long double |
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ldexpl(long double x, int n) { |
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return (scalbnl(x, n));
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} |
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#endif
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#endif
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|
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#if defined(_ARCH_PPC)
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/* correct (but slow) PowerPC rint() (glibc version is incorrect) */
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static 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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|
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#define rint qemu_rint
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#endif
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|
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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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|
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float32 uint32_to_float32(unsigned int v STATUS_PARAM) |
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{
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return (float32)v;
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} |
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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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float64 uint32_to_float64(unsigned int v STATUS_PARAM) |
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{
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return (float64)v;
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} |
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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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float32 uint64_to_float32( uint64_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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float64 uint64_to_float64( uint64_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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unsigned int float32_to_uint32( float32 a STATUS_PARAM) |
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{
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int64_t v; |
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unsigned int res; |
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|
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v = llrintf(a); |
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if (v < 0) { |
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res = 0;
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} else if (v > 0xffffffff) { |
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res = 0xffffffff;
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} else {
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res = v; |
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} |
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return res;
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} |
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unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM) |
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{
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int64_t v; |
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unsigned int res; |
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v = (int64_t)a; |
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if (v < 0) { |
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res = 0;
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} else if (v > 0xffffffff) { |
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res = 0xffffffff;
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} else {
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res = v; |
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} |
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return res;
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} |
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|
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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 float_relation_less;
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} else if (a == b) { |
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return float_relation_equal;
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} else if (a > b) { |
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return float_relation_greater;
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} else {
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return float_relation_unordered;
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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 float_relation_less;
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} else if (a == b) { |
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return float_relation_equal;
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} else if (isgreater(a, b)) { |
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return float_relation_greater;
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} else {
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return float_relation_unordered;
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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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int float32_is_nan( float32 a1 )
|
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{
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float32u 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 ( 0xFF800000 < ( a<<1 ) ); |
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} |
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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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unsigned int float64_to_uint32( float64 a STATUS_PARAM) |
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{
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int64_t v; |
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unsigned int res; |
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|
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v = llrint(a); |
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if (v < 0) { |
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res = 0;
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} else if (v > 0xffffffff) { |
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res = 0xffffffff;
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} else {
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res = v; |
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} |
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return res;
|
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} |
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unsigned int float64_to_uint32_round_to_zero( float64 a STATUS_PARAM) |
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{
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int64_t v; |
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unsigned int res; |
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|
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v = (int64_t)a; |
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if (v < 0) { |
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res = 0;
|
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} else if (v > 0xffffffff) { |
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res = 0xffffffff;
|
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} else {
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res = v; |
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} |
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return res;
|
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} |
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uint64_t float64_to_uint64 (float64 a STATUS_PARAM) |
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{
|
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int64_t v; |
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|
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v = llrint(a + (float64)INT64_MIN); |
| 334 |
|
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return v - INT64_MIN;
|
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} |
| 337 |
uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM) |
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{
|
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int64_t v; |
| 340 |
|
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v = (int64_t)(a + (float64)INT64_MIN); |
| 342 |
|
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return v - INT64_MIN;
|
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} |
| 345 |
|
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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__) && defined(HOST_SOLARIS) && HOST_SOLARIS < 10 |
| 350 |
static inline float64 trunc(float64 x) |
| 351 |
{
|
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return x < 0 ? -floor(-x) : floor(x); |
| 353 |
} |
| 354 |
#endif
|
| 355 |
float64 float64_trunc_to_int( float64 a STATUS_PARAM ) |
| 356 |
{
|
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return trunc(a);
|
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} |
| 359 |
|
| 360 |
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)) {
|
| 364 |
default:
|
| 365 |
case float_round_nearest_even:
|
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asm("rndd %0, %1" : "=f" (a) : "f"(a)); |
| 367 |
break;
|
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case float_round_down:
|
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asm("rnddm %0, %1" : "=f" (a) : "f"(a)); |
| 370 |
break;
|
| 371 |
case float_round_up:
|
| 372 |
asm("rnddp %0, %1" : "=f" (a) : "f"(a)); |
| 373 |
break;
|
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case float_round_to_zero:
|
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asm("rnddz %0, %1" : "=f" (a) : "f"(a)); |
| 376 |
break;
|
| 377 |
} |
| 378 |
#else
|
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return rint(a);
|
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#endif
|
| 381 |
} |
| 382 |
|
| 383 |
float64 float64_rem( float64 a, float64 b STATUS_PARAM) |
| 384 |
{
|
| 385 |
return remainder(a, b);
|
| 386 |
} |
| 387 |
|
| 388 |
float64 float64_sqrt( float64 a STATUS_PARAM) |
| 389 |
{
|
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return sqrt(a);
|
| 391 |
} |
| 392 |
int float64_compare( float64 a, float64 b STATUS_PARAM )
|
| 393 |
{
|
| 394 |
if (a < b) {
|
| 395 |
return float_relation_less;
|
| 396 |
} else if (a == b) { |
| 397 |
return float_relation_equal;
|
| 398 |
} else if (a > b) { |
| 399 |
return float_relation_greater;
|
| 400 |
} else {
|
| 401 |
return float_relation_unordered;
|
| 402 |
} |
| 403 |
} |
| 404 |
int float64_compare_quiet( float64 a, float64 b STATUS_PARAM )
|
| 405 |
{
|
| 406 |
if (isless(a, b)) {
|
| 407 |
return float_relation_less;
|
| 408 |
} else if (a == b) { |
| 409 |
return float_relation_equal;
|
| 410 |
} else if (isgreater(a, b)) { |
| 411 |
return float_relation_greater;
|
| 412 |
} else {
|
| 413 |
return float_relation_unordered;
|
| 414 |
} |
| 415 |
} |
| 416 |
int float64_is_signaling_nan( float64 a1)
|
| 417 |
{
|
| 418 |
float64u u; |
| 419 |
uint64_t a; |
| 420 |
u.f = a1; |
| 421 |
a = u.i; |
| 422 |
return
|
| 423 |
( ( ( a>>51 ) & 0xFFF ) == 0xFFE ) |
| 424 |
&& ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
|
| 425 |
|
| 426 |
} |
| 427 |
|
| 428 |
int float64_is_nan( float64 a1 )
|
| 429 |
{
|
| 430 |
float64u u; |
| 431 |
uint64_t a; |
| 432 |
u.f = a1; |
| 433 |
a = u.i; |
| 434 |
|
| 435 |
return ( LIT64( 0xFFF0000000000000 ) < (bits64) ( a<<1 ) ); |
| 436 |
|
| 437 |
} |
| 438 |
|
| 439 |
#ifdef FLOATX80
|
| 440 |
|
| 441 |
/*----------------------------------------------------------------------------
|
| 442 |
| Software IEC/IEEE extended double-precision conversion routines.
|
| 443 |
*----------------------------------------------------------------------------*/
|
| 444 |
int floatx80_to_int32( floatx80 a STATUS_PARAM)
|
| 445 |
{
|
| 446 |
return long_to_int32(lrintl(a));
|
| 447 |
} |
| 448 |
int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM)
|
| 449 |
{
|
| 450 |
return (int)a; |
| 451 |
} |
| 452 |
int64_t floatx80_to_int64( floatx80 a STATUS_PARAM) |
| 453 |
{
|
| 454 |
return llrintl(a);
|
| 455 |
} |
| 456 |
int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM) |
| 457 |
{
|
| 458 |
return (int64_t)a;
|
| 459 |
} |
| 460 |
float32 floatx80_to_float32( floatx80 a STATUS_PARAM) |
| 461 |
{
|
| 462 |
return a;
|
| 463 |
} |
| 464 |
float64 floatx80_to_float64( floatx80 a STATUS_PARAM) |
| 465 |
{
|
| 466 |
return a;
|
| 467 |
} |
| 468 |
|
| 469 |
/*----------------------------------------------------------------------------
|
| 470 |
| Software IEC/IEEE extended double-precision operations.
|
| 471 |
*----------------------------------------------------------------------------*/
|
| 472 |
floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM) |
| 473 |
{
|
| 474 |
return rintl(a);
|
| 475 |
} |
| 476 |
floatx80 floatx80_rem( floatx80 a, floatx80 b STATUS_PARAM) |
| 477 |
{
|
| 478 |
return remainderl(a, b);
|
| 479 |
} |
| 480 |
floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM) |
| 481 |
{
|
| 482 |
return sqrtl(a);
|
| 483 |
} |
| 484 |
int floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM )
|
| 485 |
{
|
| 486 |
if (a < b) {
|
| 487 |
return float_relation_less;
|
| 488 |
} else if (a == b) { |
| 489 |
return float_relation_equal;
|
| 490 |
} else if (a > b) { |
| 491 |
return float_relation_greater;
|
| 492 |
} else {
|
| 493 |
return float_relation_unordered;
|
| 494 |
} |
| 495 |
} |
| 496 |
int floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM )
|
| 497 |
{
|
| 498 |
if (isless(a, b)) {
|
| 499 |
return float_relation_less;
|
| 500 |
} else if (a == b) { |
| 501 |
return float_relation_equal;
|
| 502 |
} else if (isgreater(a, b)) { |
| 503 |
return float_relation_greater;
|
| 504 |
} else {
|
| 505 |
return float_relation_unordered;
|
| 506 |
} |
| 507 |
} |
| 508 |
int floatx80_is_signaling_nan( floatx80 a1)
|
| 509 |
{
|
| 510 |
floatx80u u; |
| 511 |
uint64_t aLow; |
| 512 |
u.f = a1; |
| 513 |
|
| 514 |
aLow = u.i.low & ~ LIT64( 0x4000000000000000 );
|
| 515 |
return
|
| 516 |
( ( u.i.high & 0x7FFF ) == 0x7FFF ) |
| 517 |
&& (bits64) ( aLow<<1 )
|
| 518 |
&& ( u.i.low == aLow ); |
| 519 |
} |
| 520 |
|
| 521 |
int floatx80_is_nan( floatx80 a1 )
|
| 522 |
{
|
| 523 |
floatx80u u; |
| 524 |
u.f = a1; |
| 525 |
return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 ); |
| 526 |
} |
| 527 |
|
| 528 |
#endif
|