diff options
Diffstat (limited to 'lib/floatundixf.c')
| -rw-r--r-- | lib/floatundixf.c | 46 |
1 files changed, 24 insertions, 22 deletions
diff --git a/lib/floatundixf.c b/lib/floatundixf.c index 6e8c4839f..d87224f90 100644 --- a/lib/floatundixf.c +++ b/lib/floatundixf.c @@ -1,28 +1,30 @@ -//===-- floatundixf.c - Implement __floatundixf ---------------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file implements __floatundixf for the compiler_rt library. -// -//===----------------------------------------------------------------------===// +/* ===-- floatundixf.c - Implement __floatundixf ---------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is distributed under the University of Illinois Open Source + * License. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * This file implements __floatundixf for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ #if !_ARCH_PPC #include "int_lib.h" -// Returns: convert a to a long double, rounding toward even. +/* Returns: convert a to a long double, rounding toward even. */ -// Assumption: long double is a IEEE 80 bit floating point type padded to 128 bits -// du_int is a 64 bit integral type - -// gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee | -// 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm +/* Assumption: long double is a IEEE 80 bit floating point type padded to 128 bits + * du_int is a 64 bit integral type + */ +/* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee | + * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm + */ long double __floatundixf(du_int a) { @@ -30,11 +32,11 @@ __floatundixf(du_int a) return 0.0; const unsigned N = sizeof(du_int) * CHAR_BIT; int clz = __builtin_clzll(a); - int e = (N - 1) - clz ; // exponent + int e = (N - 1) - clz ; /* exponent */ long_double_bits fb; - fb.u.high.low = (e + 16383); // exponent - fb.u.low.all = a << clz; // mantissa + fb.u.high.low = (e + 16383); /* exponent */ + fb.u.low.all = a << clz; /* mantissa */ return fb.f; } -#endif +#endif /* _ARCH_PPC */ |