/* Native implementation of soft float functions. Only a single status context is supported */ #include "softfloat.h" #include void set_float_rounding_mode(int val STATUS_PARAM) { STATUS(float_rounding_mode) = val; #if defined(_BSD) && !defined(__APPLE__) fpsetround(val); #elif defined(__arm__) /* nothing to do */ #else fesetround(val); #endif } #ifdef FLOATX80 void set_floatx80_rounding_precision(int val STATUS_PARAM) { STATUS(floatx80_rounding_precision) = val; } #endif #if defined(_BSD) #define lrint(d) ((int32_t)rint(d)) #define llrint(d) ((int64_t)rint(d)) #endif #if defined(__powerpc__) /* correct (but slow) PowerPC rint() (glibc version is incorrect) */ double qemu_rint(double x) { double y = 4503599627370496.0; if (fabs(x) >= y) return x; if (x < 0) y = -y; y = (x + y) - y; if (y == 0.0) y = copysign(y, x); return y; } #define rint qemu_rint #endif /*---------------------------------------------------------------------------- | Software IEC/IEEE integer-to-floating-point conversion routines. *----------------------------------------------------------------------------*/ float32 int32_to_float32(int v STATUS_PARAM) { return (float32)v; } float64 int32_to_float64(int v STATUS_PARAM) { return (float64)v; } #ifdef FLOATX80 floatx80 int32_to_floatx80(int v STATUS_PARAM) { return (floatx80)v; } #endif float32 int64_to_float32( int64_t v STATUS_PARAM) { return (float32)v; } float64 int64_to_float64( int64_t v STATUS_PARAM) { return (float64)v; } #ifdef FLOATX80 floatx80 int64_to_floatx80( int64_t v STATUS_PARAM) { return (floatx80)v; } #endif /*---------------------------------------------------------------------------- | Software IEC/IEEE single-precision conversion routines. *----------------------------------------------------------------------------*/ int float32_to_int32( float32 a STATUS_PARAM) { return lrintf(a); } int float32_to_int32_round_to_zero( float32 a STATUS_PARAM) { return (int)a; } int64_t float32_to_int64( float32 a STATUS_PARAM) { return llrintf(a); } int64_t float32_to_int64_round_to_zero( float32 a STATUS_PARAM) { return (int64_t)a; } float64 float32_to_float64( float32 a STATUS_PARAM) { return a; } #ifdef FLOATX80 floatx80 float32_to_floatx80( float32 a STATUS_PARAM) { return a; } #endif /*---------------------------------------------------------------------------- | Software IEC/IEEE single-precision operations. *----------------------------------------------------------------------------*/ float32 float32_round_to_int( float32 a STATUS_PARAM) { return rintf(a); } float32 float32_sqrt( float32 a STATUS_PARAM) { return sqrtf(a); } char float32_is_signaling_nan( float32 a1) { float32u u; uint32_t a; u.f = a1; a = u.i; return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF ); } /*---------------------------------------------------------------------------- | Software IEC/IEEE double-precision conversion routines. *----------------------------------------------------------------------------*/ int float64_to_int32( float64 a STATUS_PARAM) { return lrint(a); } int float64_to_int32_round_to_zero( float64 a STATUS_PARAM) { return (int)a; } int64_t float64_to_int64( float64 a STATUS_PARAM) { return llrint(a); } int64_t float64_to_int64_round_to_zero( float64 a STATUS_PARAM) { return (int64_t)a; } float32 float64_to_float32( float64 a STATUS_PARAM) { return a; } #ifdef FLOATX80 floatx80 float64_to_floatx80( float64 a STATUS_PARAM) { return a; } #endif #ifdef FLOAT128 float128 float64_to_float128( float64 a STATUS_PARAM) { return a; } #endif /*---------------------------------------------------------------------------- | Software IEC/IEEE double-precision operations. *----------------------------------------------------------------------------*/ float64 float64_round_to_int( float64 a STATUS_PARAM ) { #if defined(__arm__) switch(STATUS(float_rounding_mode)) { default: case float_round_nearest_even: asm("rndd %0, %1" : "=f" (a) : "f"(a)); break; case float_round_down: asm("rnddm %0, %1" : "=f" (a) : "f"(a)); break; case float_round_up: asm("rnddp %0, %1" : "=f" (a) : "f"(a)); break; case float_round_to_zero: asm("rnddz %0, %1" : "=f" (a) : "f"(a)); break; } #else return rint(a); #endif } float64 float64_sqrt( float64 a STATUS_PARAM) { return sqrt(a); } char float64_is_signaling_nan( float64 a1) { float64u u; uint64_t a; u.f = a1; a = u.i; return ( ( ( a>>51 ) & 0xFFF ) == 0xFFE ) && ( a & LIT64( 0x0007FFFFFFFFFFFF ) ); } #ifdef FLOATX80 /*---------------------------------------------------------------------------- | Software IEC/IEEE extended double-precision conversion routines. *----------------------------------------------------------------------------*/ int floatx80_to_int32( floatx80 a STATUS_PARAM) { return lrintl(a); } int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM) { return (int)a; } int64_t floatx80_to_int64( floatx80 a STATUS_PARAM) { return llrintl(a); } int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM) { return (int64_t)a; } float32 floatx80_to_float32( floatx80 a STATUS_PARAM) { return a; } float64 floatx80_to_float64( floatx80 a STATUS_PARAM) { return a; } /*---------------------------------------------------------------------------- | Software IEC/IEEE extended double-precision operations. *----------------------------------------------------------------------------*/ floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM) { return rintl(a); } floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM) { return sqrtl(a); } char floatx80_is_signaling_nan( floatx80 a1) { floatx80u u; u.f = a1; return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 ); } #endif