Another generic-version of an originally target-specific .h file.
This still needs target-NaN, endian, and the arm26 DEMANGLE special case. This may be moved back under arch/ in the future.
This commit is contained in:
ross
parent
159fa2a091
commit
0cdd4f95c5
534
regress/lib/libc/ieeefp/testfloat/include/softfloat-specialize
Normal file
534
regress/lib/libc/ieeefp/testfloat/include/softfloat-specialize
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@ -0,0 +1,534 @@
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/* $NetBSD: softfloat-specialize,v 1.1 2001/03/13 07:25:02 ross Exp $ */
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/* This is a derivative work. */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Ross Harvey.
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*
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
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* are met:
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||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
|
||||
* Foundation, Inc. and its contributors.
|
||||
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
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*
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||||
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||||
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||||
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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===============================================================================
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This C source fragment is part of the SoftFloat IEC/IEEE Floating-point
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Arithmetic Package, Release 2a.
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Written by John R. Hauser. This work was made possible in part by the
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International Computer Science Institute, located at Suite 600, 1947 Center
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Street, Berkeley, California 94704. Funding was partially provided by the
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National Science Foundation under grant MIP-9311980. The original version
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of this code was written as part of a project to build a fixed-point vector
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processor in collaboration with the University of California at Berkeley,
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overseen by Profs. Nelson Morgan and John Wawrzynek. More information
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is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
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arithmetic/SoftFloat.html'.
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THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
|
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has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
|
||||
TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
|
||||
PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
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AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
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|
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Derivative works are acceptable, even for commercial purposes, so long as
|
||||
(1) they include prominent notice that the work is derivative, and (2) they
|
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include prominent notice akin to these four paragraphs for those parts of
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this code that are retained.
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===============================================================================
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*/
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/*
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-------------------------------------------------------------------------------
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Underflow tininess-detection mode, statically initialized to default value.
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-------------------------------------------------------------------------------
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*/
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int float_detect_tininess = float_tininess_after_rounding;
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/*
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-------------------------------------------------------------------------------
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Raises the exceptions specified by `flags'. Floating-point traps can be
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defined here if desired. It is currently not possible for such a trap
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to substitute a result value. If traps are not implemented, this routine
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should be simply `float_exception_flags |= flags;'.
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-------------------------------------------------------------------------------
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*/
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void float_raise( int flags )
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{
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float_exception_flags |= flags;
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}
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/*
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-------------------------------------------------------------------------------
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Internal canonical NaN format.
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-------------------------------------------------------------------------------
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*/
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typedef struct {
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flag sign;
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bits64 high, low;
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} commonNaNT;
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/*
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-------------------------------------------------------------------------------
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The pattern for a default generated single-precision NaN.
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-------------------------------------------------------------------------------
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*/
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#define float32_default_nan 0xFFC00000
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/*
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-------------------------------------------------------------------------------
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Returns 1 if the single-precision floating-point value `a' is a NaN;
|
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otherwise returns 0.
|
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-------------------------------------------------------------------------------
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*/
|
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static flag float32_is_nan( float32 a )
|
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{
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|
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return ( 0xFF000000 < (bits32) ( a<<1 ) );
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|
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}
|
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|
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/*
|
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-------------------------------------------------------------------------------
|
||||
Returns 1 if the single-precision floating-point value `a' is a signaling
|
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NaN; otherwise returns 0.
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-------------------------------------------------------------------------------
|
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*/
|
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flag float32_is_signaling_nan( float32 a )
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{
|
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|
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return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
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|
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}
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|
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/*
|
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-------------------------------------------------------------------------------
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Returns the result of converting the single-precision floating-point NaN
|
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`a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
|
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exception is raised.
|
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-------------------------------------------------------------------------------
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*/
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static commonNaNT float32ToCommonNaN( float32 a )
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{
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commonNaNT z;
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if ( float32_is_signaling_nan( a ) ) float_raise( float_flag_invalid );
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z.sign = a>>31;
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z.low = 0;
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z.high = ( (bits64) a )<<41;
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return z;
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|
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}
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|
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/*
|
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-------------------------------------------------------------------------------
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Returns the result of converting the canonical NaN `a' to the single-
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precision floating-point format.
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-------------------------------------------------------------------------------
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*/
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static float32 commonNaNToFloat32( commonNaNT a )
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{
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return ( ( (bits32) a.sign )<<31 ) | 0x7FC00000 | ( a.high>>41 );
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}
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/*
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-------------------------------------------------------------------------------
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Takes two single-precision floating-point values `a' and `b', one of which
|
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is a NaN, and returns the appropriate NaN result. If either `a' or `b' is a
|
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signaling NaN, the invalid exception is raised.
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-------------------------------------------------------------------------------
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*/
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static float32 propagateFloat32NaN( float32 a, float32 b )
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{
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flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
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aIsNaN = float32_is_nan( a );
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aIsSignalingNaN = float32_is_signaling_nan( a );
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bIsNaN = float32_is_nan( b );
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bIsSignalingNaN = float32_is_signaling_nan( b );
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a |= 0x00400000;
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b |= 0x00400000;
|
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if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid );
|
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if ( aIsSignalingNaN ) {
|
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if ( bIsSignalingNaN ) goto returnLargerSignificand;
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return bIsNaN ? b : a;
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}
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else if ( aIsNaN ) {
|
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if ( bIsSignalingNaN | ! bIsNaN ) return a;
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returnLargerSignificand:
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if ( (bits32) ( a<<1 ) < (bits32) ( b<<1 ) ) return b;
|
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if ( (bits32) ( b<<1 ) < (bits32) ( a<<1 ) ) return a;
|
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return ( a < b ) ? a : b;
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}
|
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else {
|
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return b;
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}
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|
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}
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/*
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-------------------------------------------------------------------------------
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The pattern for a default generated double-precision NaN.
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-------------------------------------------------------------------------------
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*/
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#define float64_default_nan LIT64( 0xFFF8000000000000 )
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/*
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-------------------------------------------------------------------------------
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Returns 1 if the double-precision floating-point value `a' is a NaN;
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otherwise returns 0.
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-------------------------------------------------------------------------------
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*/
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static flag float64_is_nan( float64 a )
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{
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return ( LIT64( 0xFFE0000000000000 ) < (bits64) ( a<<1 ) );
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|
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}
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|
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/*
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-------------------------------------------------------------------------------
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Returns 1 if the double-precision floating-point value `a' is a signaling
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NaN; otherwise returns 0.
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-------------------------------------------------------------------------------
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*/
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flag float64_is_signaling_nan( float64 a )
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{
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return
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( ( ( a>>51 ) & 0xFFF ) == 0xFFE )
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&& ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
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}
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|
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/*
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-------------------------------------------------------------------------------
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Returns the result of converting the double-precision floating-point NaN
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`a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
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exception is raised.
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-------------------------------------------------------------------------------
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*/
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static commonNaNT float64ToCommonNaN( float64 a )
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{
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commonNaNT z;
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if ( float64_is_signaling_nan( a ) ) float_raise( float_flag_invalid );
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z.sign = a>>63;
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z.low = 0;
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z.high = a<<12;
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return z;
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|
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}
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||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the canonical NaN `a' to the double-
|
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precision floating-point format.
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-------------------------------------------------------------------------------
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*/
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static float64 commonNaNToFloat64( commonNaNT a )
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{
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return
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( ( (bits64) a.sign )<<63 )
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| LIT64( 0x7FF8000000000000 )
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| ( a.high>>12 );
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|
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}
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||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Takes two double-precision floating-point values `a' and `b', one of which
|
||||
is a NaN, and returns the appropriate NaN result. If either `a' or `b' is a
|
||||
signaling NaN, the invalid exception is raised.
|
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-------------------------------------------------------------------------------
|
||||
*/
|
||||
static float64 propagateFloat64NaN( float64 a, float64 b )
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||||
{
|
||||
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
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aIsNaN = float64_is_nan( a );
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aIsSignalingNaN = float64_is_signaling_nan( a );
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bIsNaN = float64_is_nan( b );
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bIsSignalingNaN = float64_is_signaling_nan( b );
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a |= LIT64( 0x0008000000000000 );
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b |= LIT64( 0x0008000000000000 );
|
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if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid );
|
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if ( aIsSignalingNaN ) {
|
||||
if ( bIsSignalingNaN ) goto returnLargerSignificand;
|
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return bIsNaN ? b : a;
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}
|
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else if ( aIsNaN ) {
|
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if ( bIsSignalingNaN | ! bIsNaN ) return a;
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returnLargerSignificand:
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if ( (bits64) ( a<<1 ) < (bits64) ( b<<1 ) ) return b;
|
||||
if ( (bits64) ( b<<1 ) < (bits64) ( a<<1 ) ) return a;
|
||||
return ( a < b ) ? a : b;
|
||||
}
|
||||
else {
|
||||
return b;
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||||
}
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||||
|
||||
}
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||||
|
||||
#ifdef FLOATX80
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||||
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/*
|
||||
-------------------------------------------------------------------------------
|
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The pattern for a default generated extended double-precision NaN. The
|
||||
`high' and `low' values hold the most- and least-significant bits,
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||||
respectively.
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||||
-------------------------------------------------------------------------------
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||||
*/
|
||||
#define floatx80_default_nan_high 0xFFFF
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||||
#define floatx80_default_nan_low LIT64( 0xC000000000000000 )
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||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the extended double-precision floating-point value `a' is a
|
||||
NaN; otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static flag floatx80_is_nan( floatx80 a )
|
||||
{
|
||||
|
||||
return ( ( a.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( a.low<<1 );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the extended double-precision floating-point value `a' is a
|
||||
signaling NaN; otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
flag floatx80_is_signaling_nan( floatx80 a )
|
||||
{
|
||||
bits64 aLow;
|
||||
|
||||
aLow = a.low & ~ LIT64( 0x4000000000000000 );
|
||||
return
|
||||
( ( a.high & 0x7FFF ) == 0x7FFF )
|
||||
&& (bits64) ( aLow<<1 )
|
||||
&& ( a.low == aLow );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the extended double-precision floating-
|
||||
point NaN `a' to the canonical NaN format. If `a' is a signaling NaN, the
|
||||
invalid exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static commonNaNT floatx80ToCommonNaN( floatx80 a )
|
||||
{
|
||||
commonNaNT z;
|
||||
|
||||
if ( floatx80_is_signaling_nan( a ) ) float_raise( float_flag_invalid );
|
||||
z.sign = a.high>>15;
|
||||
z.low = 0;
|
||||
z.high = a.low<<1;
|
||||
return z;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the canonical NaN `a' to the extended
|
||||
double-precision floating-point format.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static floatx80 commonNaNToFloatx80( commonNaNT a )
|
||||
{
|
||||
floatx80 z;
|
||||
|
||||
z.low = LIT64( 0xC000000000000000 ) | ( a.high>>1 );
|
||||
z.high = ( ( (bits16) a.sign )<<15 ) | 0x7FFF;
|
||||
return z;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Takes two extended double-precision floating-point values `a' and `b', one
|
||||
of which is a NaN, and returns the appropriate NaN result. If either `a' or
|
||||
`b' is a signaling NaN, the invalid exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static floatx80 propagateFloatx80NaN( floatx80 a, floatx80 b )
|
||||
{
|
||||
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
|
||||
|
||||
aIsNaN = floatx80_is_nan( a );
|
||||
aIsSignalingNaN = floatx80_is_signaling_nan( a );
|
||||
bIsNaN = floatx80_is_nan( b );
|
||||
bIsSignalingNaN = floatx80_is_signaling_nan( b );
|
||||
a.low |= LIT64( 0xC000000000000000 );
|
||||
b.low |= LIT64( 0xC000000000000000 );
|
||||
if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid );
|
||||
if ( aIsSignalingNaN ) {
|
||||
if ( bIsSignalingNaN ) goto returnLargerSignificand;
|
||||
return bIsNaN ? b : a;
|
||||
}
|
||||
else if ( aIsNaN ) {
|
||||
if ( bIsSignalingNaN | ! bIsNaN ) return a;
|
||||
returnLargerSignificand:
|
||||
if ( a.low < b.low ) return b;
|
||||
if ( b.low < a.low ) return a;
|
||||
return ( a.high < b.high ) ? a : b;
|
||||
}
|
||||
else {
|
||||
return b;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#ifdef FLOAT128
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
The pattern for a default generated quadruple-precision NaN. The `high' and
|
||||
`low' values hold the most- and least-significant bits, respectively.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
#define float128_default_nan_high LIT64( 0xFFFF800000000000 )
|
||||
#define float128_default_nan_low LIT64( 0x0000000000000000 )
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the quadruple-precision floating-point value `a' is a NaN;
|
||||
otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
flag float128_is_nan( float128 a )
|
||||
{
|
||||
|
||||
return
|
||||
( LIT64( 0xFFFE000000000000 ) <= (bits64) ( a.high<<1 ) )
|
||||
&& ( a.low || ( a.high & LIT64( 0x0000FFFFFFFFFFFF ) ) );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns 1 if the quadruple-precision floating-point value `a' is a
|
||||
signaling NaN; otherwise returns 0.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
flag float128_is_signaling_nan( float128 a )
|
||||
{
|
||||
|
||||
return
|
||||
( ( ( a.high>>47 ) & 0xFFFF ) == 0xFFFE )
|
||||
&& ( a.low || ( a.high & LIT64( 0x00007FFFFFFFFFFF ) ) );
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the quadruple-precision floating-point NaN
|
||||
`a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
|
||||
exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static commonNaNT float128ToCommonNaN( float128 a )
|
||||
{
|
||||
commonNaNT z;
|
||||
|
||||
if ( float128_is_signaling_nan( a ) ) float_raise( float_flag_invalid );
|
||||
z.sign = a.high>>63;
|
||||
shortShift128Left( a.high, a.low, 16, &z.high, &z.low );
|
||||
return z;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Returns the result of converting the canonical NaN `a' to the quadruple-
|
||||
precision floating-point format.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static float128 commonNaNToFloat128( commonNaNT a )
|
||||
{
|
||||
float128 z;
|
||||
|
||||
shift128Right( a.high, a.low, 16, &z.high, &z.low );
|
||||
z.high |= ( ( (bits64) a.sign )<<63 ) | LIT64( 0x7FFF800000000000 );
|
||||
return z;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
-------------------------------------------------------------------------------
|
||||
Takes two quadruple-precision floating-point values `a' and `b', one of
|
||||
which is a NaN, and returns the appropriate NaN result. If either `a' or
|
||||
`b' is a signaling NaN, the invalid exception is raised.
|
||||
-------------------------------------------------------------------------------
|
||||
*/
|
||||
static float128 propagateFloat128NaN( float128 a, float128 b )
|
||||
{
|
||||
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
|
||||
|
||||
aIsNaN = float128_is_nan( a );
|
||||
aIsSignalingNaN = float128_is_signaling_nan( a );
|
||||
bIsNaN = float128_is_nan( b );
|
||||
bIsSignalingNaN = float128_is_signaling_nan( b );
|
||||
a.high |= LIT64( 0x0000800000000000 );
|
||||
b.high |= LIT64( 0x0000800000000000 );
|
||||
if ( aIsSignalingNaN | bIsSignalingNaN ) float_raise( float_flag_invalid );
|
||||
if ( aIsSignalingNaN ) {
|
||||
if ( bIsSignalingNaN ) goto returnLargerSignificand;
|
||||
return bIsNaN ? b : a;
|
||||
}
|
||||
else if ( aIsNaN ) {
|
||||
if ( bIsSignalingNaN | ! bIsNaN ) return a;
|
||||
returnLargerSignificand:
|
||||
if ( lt128( a.high<<1, a.low, b.high<<1, b.low ) ) return b;
|
||||
if ( lt128( b.high<<1, b.low, a.high<<1, a.low ) ) return a;
|
||||
return ( a.high < b.high ) ? a : b;
|
||||
}
|
||||
else {
|
||||
return b;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user