diff options
Diffstat (limited to 'lib/builtins/fixunsdfdi.c')
-rw-r--r-- | lib/builtins/fixunsdfdi.c | 55 |
1 files changed, 26 insertions, 29 deletions
diff --git a/lib/builtins/fixunsdfdi.c b/lib/builtins/fixunsdfdi.c index 9e6371390d5c..2e0d87eacf05 100644 --- a/lib/builtins/fixunsdfdi.c +++ b/lib/builtins/fixunsdfdi.c @@ -6,42 +6,39 @@ * Source Licenses. See LICENSE.TXT for details. * * ===----------------------------------------------------------------------=== - * - * This file implements __fixunsdfdi for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== */ -#include "int_lib.h" +#define DOUBLE_PRECISION +#include "fp_lib.h" -/* Returns: convert a to a unsigned long long, rounding toward zero. - * Negative values all become zero. - */ +ARM_EABI_FNALIAS(d2ulz, fixunsdfdi) -/* Assumption: double is a IEEE 64 bit floating point type - * du_int is a 64 bit integral type - * value in double is representable in du_int or is negative - * (no range checking performed) +#ifndef __SOFT_FP__ +/* Support for systems that have hardware floating-point; can set the invalid + * flag as a side-effect of computation. */ -/* seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm */ - -ARM_EABI_FNALIAS(d2ulz, fixunsdfdi) - COMPILER_RT_ABI du_int __fixunsdfdi(double a) { - double_bits fb; - fb.f = a; - int e = ((fb.u.s.high & 0x7FF00000) >> 20) - 1023; - if (e < 0 || (fb.u.s.high & 0x80000000)) - return 0; - udwords r; - r.s.high = (fb.u.s.high & 0x000FFFFF) | 0x00100000; - r.s.low = fb.u.s.low; - if (e > 52) - r.all <<= (e - 52); - else - r.all >>= (52 - e); - return r.all; + if (a <= 0.0) return 0; + su_int high = a/0x1p32f; + su_int low = a - (double)high*0x1p32f; + return ((du_int)high << 32) | low; } + +#else +/* Support for systems that don't have hardware floating-point; there are no + * flags to set, and we don't want to code-gen to an unknown soft-float + * implementation. + */ + +typedef du_int fixuint_t; +#include "fp_fixuint_impl.inc" + +COMPILER_RT_ABI du_int +__fixunsdfdi(fp_t a) { + return __fixuint(a); +} + +#endif |