diff options
Diffstat (limited to 'sysdeps/sparc/sparc32/sparcv9/fpu/s_floor.S')
| -rw-r--r-- | sysdeps/sparc/sparc32/sparcv9/fpu/s_floor.S | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/s_floor.S b/sysdeps/sparc/sparc32/sparcv9/fpu/s_floor.S deleted file mode 100644 index c59f864d0e..0000000000 --- a/sysdeps/sparc/sparc32/sparcv9/fpu/s_floor.S +++ /dev/null @@ -1,92 +0,0 @@ -/* floor function, sparc32 v9 version. - Copyright (C) 2012-2016 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by David S. Miller <davem@davemloft.net>, 2012. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include <math_ldbl_opt.h> - - /* Since changing the rounding mode is extremely expensive, we - try to round up using a method that is rounding mode - agnostic. - - We add then subtract (or subtract than add if the initial - value was negative) 2**23 to the value, then subtract it - back out. - - This will clear out the fractional portion of the value. - One of two things will happen for non-whole initial values. - Either the rounding mode will round it up, or it will be - rounded down. If the value started out whole, it will be - equal after the addition and subtraction. This means we - can accurately detect with one test whether we need to add - another 1.0 to round it up properly. - - We pop constants into the FPU registers using the incoming - argument stack slots, since this avoid having to use any - PIC references. We also thus avoid having to allocate a - register window. - - VIS instructions are used to facilitate the formation of - easier constants, and the propagation of the sign bit. */ - -#define TWO_FIFTYTWO 0x43300000 /* 2**52 */ -#define ONE_DOT_ZERO 0x3ff00000 /* 1.0 */ - -#define ZERO %f10 /* 0.0 */ -#define SIGN_BIT %f12 /* -0.0 */ - -ENTRY (__floor) - sethi %hi(TWO_FIFTYTWO), %o2 - sllx %o0, 32, %o0 - sethi %hi(ONE_DOT_ZERO), %o3 - or %o0, %o1, %o0 - stx %o0, [%sp + 72] - sllx %o2, 32, %o2 - fzero ZERO - sllx %o3, 32, %o3 - - ldd [%sp + 72], %f0 - fnegd ZERO, SIGN_BIT - - stx %o2, [%sp + 72] - fabsd %f0, %f14 - - ldd [%sp + 72], %f16 - fcmpd %fcc3, %f14, %f16 - - fmovduge %fcc3, ZERO, %f16 - fand %f0, SIGN_BIT, SIGN_BIT - - for %f16, SIGN_BIT, %f16 - faddd %f0, %f16, %f18 - fsubd %f18, %f16, %f18 - fcmpd %fcc2, %f18, %f0 - stx %o3, [%sp + 72] - - ldd [%sp + 72], %f20 - fmovdule %fcc2, ZERO, %f20 - fsubd %f18, %f20, %f0 - fabsd %f0, %f0 - retl - for %f0, SIGN_BIT, %f0 -END (__floor) -weak_alias (__floor, floor) - -#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0) -compat_symbol (libm, __floor, floorl, GLIBC_2_0) -#endif |