diff options
Diffstat (limited to 'lib/floatdixf.c')
| -rw-r--r-- | lib/floatdixf.c | 45 |
1 files changed, 24 insertions, 21 deletions
diff --git a/lib/floatdixf.c b/lib/floatdixf.c index 8d6911ec0..6760ab32f 100644 --- a/lib/floatdixf.c +++ b/lib/floatdixf.c @@ -1,27 +1,30 @@ -//===-- floatdixf.c - Implement __floatdixf -------------------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file implements __floatdixf for the compiler_rt library. -// -//===----------------------------------------------------------------------===// +/* ===-- floatdixf.c - Implement __floatdixf -------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is distributed under the University of Illinois Open Source + * License. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * This file implements __floatdixf 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 -// di_int is a 64 bit integral type +/* Assumption: long double is a IEEE 80 bit floating point type padded to 128 bits + * di_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 +/* 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 __floatdixf(di_int a) @@ -32,11 +35,11 @@ __floatdixf(di_int a) const di_int s = a >> (N-1); a = (a ^ s) - s; 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 = ((su_int)s & 0x00008000) | // sign - (e + 16383); // exponent - fb.u.low.all = a << clz; // mantissa + fb.u.high.low = ((su_int)s & 0x00008000) | /* sign */ + (e + 16383); /* exponent */ + fb.u.low.all = a << clz; /* mantissa */ return fb.f; } |