diff options
Diffstat (limited to 'lib/ppc/gcc_qdiv.c')
| -rw-r--r-- | lib/ppc/gcc_qdiv.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/lib/ppc/gcc_qdiv.c b/lib/ppc/gcc_qdiv.c index 53e6c55e..70aa00b6 100644 --- a/lib/ppc/gcc_qdiv.c +++ b/lib/ppc/gcc_qdiv.c @@ -1,9 +1,11 @@ -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. +/* This file is distributed under the University of Illinois Open Source + * License. See LICENSE.TXT for details. + */ -// long double __gcc_qdiv(long double x, long double y); -// This file implements the PowerPC 128-bit double-double division operation. -// This implementation is shamelessly cribbed from Apple's DDRT, circa 1993(!) +/* long double __gcc_qdiv(long double x, long double y); + * This file implements the PowerPC 128-bit double-double division operation. + * This implementation is shamelessly cribbed from Apple's DDRT, circa 1993(!) + */ #include "DD.h" @@ -12,25 +14,25 @@ long double __gcc_qdiv(long double a, long double b) static const uint32_t infinityHi = UINT32_C(0x7ff00000); DD dst = { .ld = a }, src = { .ld = b }; - register double x = dst.hi, x1 = dst.lo, - y = src.hi, y1 = src.lo; + register double x = dst.s.hi, x1 = dst.s.lo, + y = src.s.hi, y1 = src.s.lo; double yHi, yLo, qHi, qLo; double yq, tmp, q; q = x / y; - // Detect special cases + /* Detect special cases */ if (q == 0.0) { - dst.hi = q; - dst.lo = 0.0; + dst.s.hi = q; + dst.s.lo = 0.0; return dst.ld; } const doublebits qBits = { .d = q }; if (((uint32_t)(qBits.x >> 32) & infinityHi) == infinityHi) { - dst.hi = q; - dst.lo = 0.0; + dst.s.hi = q; + dst.s.lo = 0.0; return dst.ld; } @@ -46,8 +48,8 @@ long double __gcc_qdiv(long double a, long double b) tmp = ((tmp + x1) - y1 * q) / y; x = q + tmp; - dst.lo = (q - x) + tmp; - dst.hi = x; + dst.s.lo = (q - x) + tmp; + dst.s.hi = x; return dst.ld; } |