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We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
152 lines
4.1 KiB
ArmAsm
152 lines
4.1 KiB
ArmAsm
.file "significandf.s"
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// Copyright (c) 2000 - 2003, Intel Corporation
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// All rights reserved.
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//
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// * The name of Intel Corporation may not be used to endorse or promote
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// products derived from this software without specific prior written
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// permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Intel Corporation is the author of this code, and requests that all
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// problem reports or change requests be submitted to it directly at
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// http://www.intel.com/software/products/opensource/libraries/num.htm.
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//
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// History
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//==============================================================
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// 02/02/00 Initial version
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// 02/03/00 Modified to improve speed
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// 05/31/00 Fixed bug when x a double-extended denormal
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// 05/20/02 Cleaned up namespace and sf0 syntax
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// 02/10/03 Reordered header: .section, .global, .proc, .align
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//
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// API
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//==============================================================
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// float significandf(float x)
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// Overview of operation
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//==============================================================
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// If x = sig * 2**n with 1 <= sig < 2
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// significandf returns sig
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//
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// predicate registers used:
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// p6, p7
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//
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// floating-point registers used:
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// f8, f9, f10
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.section .text
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GLOBAL_LIBM_ENTRY(significandf)
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// qnan snan inf norm unorm 0 -+
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// 1 1 1 0 0 1 11
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// f10 gets f8(sign) with f1(exp,significand)
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{ .mfi
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nop.m 999
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fmerge.s f10 = f8,f1
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fnorm.s0 f9 = f8
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nop.i 999 ;;
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}
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// Test for denormal input
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{ .mfi
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nop.m 999
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fclass.m.unc p7,p0 = f8, 0x0b
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nop.i 999 ;;
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}
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// p6 = TRUE ==> x is not (nan,inf,0)
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// return sign(f8) exp(f1) significand(f8)
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// else x is (nan,inf,0)
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// return sign(f8) exp(f8) significand(f8), normalized.
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{ .mfi
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nop.m 999
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fclass.m.unc p0,p6 = f8, 0xe7
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nop.i 999 ;;
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}
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{ .mmb
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nop.m 999
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nop.m 999
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(p7) br.cond.spnt SIGNIFICAND_DENORM ;; // Branch if x denormal
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}
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{ .mfi
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nop.m 999
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(p6) fmerge.se f8 = f10,f8
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nop.i 999 ;;
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}
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{ .mfb
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nop.m 999
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fnorm.s.s0 f8 = f8
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br.ret.sptk b0 ;;
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}
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SIGNIFICAND_DENORM:
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// Here if x denorm
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{ .mfi
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nop.m 999
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fmerge.se f8 = f10,f9
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nop.i 999 ;;
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}
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// Check if fnorm(x) still denormal, means x double-extended denormal
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{ .mfi
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nop.m 999
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fclass.m.unc p7,p0 = f9, 0x0b
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nop.i 999 ;;
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}
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// This will be the final result unless x double-extended denormal
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{ .mfi
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nop.m 999
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fnorm.s.s0 f8 = f8
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nop.i 999 ;;
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}
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// If x double-extended denorm, then significand ok, but must merge in
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// correct signexp
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{ .mfi
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nop.m 999
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(p7) fmerge.se f8 = f10,f8
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nop.i 999 ;;
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}
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// Final normalization if x double-extended denorm
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{ .mfb
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nop.m 999
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(p7) fnorm.s.s0 f8 = f8
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br.ret.sptk b0 ;;
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}
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GLOBAL_LIBM_END(significandf)
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