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316 lines
16 KiB
C
316 lines
16 KiB
C
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/*============================================================================
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This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic
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Package, Release 3, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014 The Regents of the University of California
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(Regents). All Rights Reserved. Redistribution and use in source and binary
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forms, with or without modification, are permitted provided that the following
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conditions are met:
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Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following two paragraphs of disclaimer.
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Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following two paragraphs of disclaimer in the
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documentation and/or other materials provided with the distribution. Neither
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the name of the Regents nor the names of its contributors may be used to
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endorse or promote products derived from this software without specific prior
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written permission.
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IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
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SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING
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OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS
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BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
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HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
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MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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=============================================================================*/
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#ifndef specialize_h
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#define specialize_h 1
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#include <stdbool.h>
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#include <stdint.h>
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#include "softfloat_types.h"
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/*----------------------------------------------------------------------------
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| Default value for `softfloat_detectTininess'.
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*----------------------------------------------------------------------------*/
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#define init_detectTininess softfloat_tininess_afterRounding;
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/*----------------------------------------------------------------------------
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| "Common NaN" structure, used to transfer NaN representations from one format
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| to another.
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*----------------------------------------------------------------------------*/
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struct commonNaN {
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bool sign;
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#ifdef LITTLEENDIAN
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uint64_t v0, v64;
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#else
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uint64_t v64, v0;
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#endif
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};
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/*----------------------------------------------------------------------------
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| The bit pattern for a default generated 32-bit floating-point NaN.
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*----------------------------------------------------------------------------*/
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#define defaultNaNF32UI 0xFFC00000
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/*----------------------------------------------------------------------------
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| Returns true when 32-bit unsigned integer `uiA' has the bit pattern of a
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| 32-bit floating-point signaling NaN.
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| Note: This macro evaluates its argument more than once.
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*----------------------------------------------------------------------------*/
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#define softfloat_isSigNaNF32UI( uiA ) ((((uiA) & 0x7FC00000) == 0x7F800000) && ((uiA) & 0x003FFFFF))
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/*----------------------------------------------------------------------------
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| Assuming `uiA' has the bit pattern of a 32-bit floating-point NaN, converts
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| this NaN to the common NaN form, and stores the resulting common NaN at the
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| location pointed to by `zPtr'. If the NaN is a signaling NaN, the invalid
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| exception is raised.
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*----------------------------------------------------------------------------*/
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void softfloat_f32UIToCommonNaN( uint_fast32_t uiA, struct commonNaN *zPtr );
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/*----------------------------------------------------------------------------
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| Converts the common NaN pointed to by `aPtr' into a 32-bit floating-point
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| NaN, and returns the bit pattern of this value as an unsigned integer.
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*----------------------------------------------------------------------------*/
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uint_fast32_t softfloat_commonNaNToF32UI( const struct commonNaN *aPtr );
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/*----------------------------------------------------------------------------
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| Interpreting `uiA' and `uiB' as the bit patterns of two 32-bit floating-
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| point values, at least one of which is a NaN, returns the bit pattern of
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| the combined NaN result. If either `uiA' or `uiB' has the pattern of a
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| signaling NaN, the invalid exception is raised.
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*----------------------------------------------------------------------------*/
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uint_fast32_t
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softfloat_propagateNaNF32UI( uint_fast32_t uiA, uint_fast32_t uiB );
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/*----------------------------------------------------------------------------
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| The bit pattern for a default generated 64-bit floating-point NaN.
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*----------------------------------------------------------------------------*/
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#define defaultNaNF64UI UINT64_C( 0xFFF8000000000000 )
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/*----------------------------------------------------------------------------
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| Returns true when 64-bit unsigned integer `uiA' has the bit pattern of a
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| 64-bit floating-point signaling NaN.
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| Note: This macro evaluates its argument more than once.
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*----------------------------------------------------------------------------*/
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#define softfloat_isSigNaNF64UI( uiA ) ((((uiA) & UINT64_C( 0x7FF8000000000000 )) == UINT64_C( 0x7FF0000000000000 )) && ((uiA) & UINT64_C( 0x0007FFFFFFFFFFFF )))
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/*----------------------------------------------------------------------------
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| Assuming `uiA' has the bit pattern of a 64-bit floating-point NaN, converts
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| this NaN to the common NaN form, and stores the resulting common NaN at the
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| location pointed to by `zPtr'. If the NaN is a signaling NaN, the invalid
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| exception is raised.
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*----------------------------------------------------------------------------*/
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void softfloat_f64UIToCommonNaN( uint_fast64_t uiA, struct commonNaN *zPtr );
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/*----------------------------------------------------------------------------
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| Converts the common NaN pointed to by `aPtr' into a 64-bit floating-point
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| NaN, and returns the bit pattern of this value as an unsigned integer.
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*----------------------------------------------------------------------------*/
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uint_fast64_t softfloat_commonNaNToF64UI( const struct commonNaN *aPtr );
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/*----------------------------------------------------------------------------
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| Interpreting `uiA' and `uiB' as the bit patterns of two 64-bit floating-
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| point values, at least one of which is a NaN, returns the bit pattern of
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| the combined NaN result. If either `uiA' or `uiB' has the pattern of a
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| signaling NaN, the invalid exception is raised.
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*----------------------------------------------------------------------------*/
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uint_fast64_t
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softfloat_propagateNaNF64UI( uint_fast64_t uiA, uint_fast64_t uiB );
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/*----------------------------------------------------------------------------
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| The bit pattern for a default generated 80-bit extended floating-point NaN.
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*----------------------------------------------------------------------------*/
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#define defaultNaNExtF80UI64 0xFFFF
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#define defaultNaNExtF80UI0 UINT64_C( 0xC000000000000000 )
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/*----------------------------------------------------------------------------
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| Returns true when the 80-bit unsigned integer formed from concatenating
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| 16-bit `uiA64' and 64-bit `uiA0' has the bit pattern of an 80-bit extended
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| floating-point signaling NaN.
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| Note: This macro evaluates its arguments more than once.
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*----------------------------------------------------------------------------*/
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#define softfloat_isSigNaNExtF80UI( uiA64, uiA0 ) ((((uiA64) & 0x7FFF) == 0x7FFF) && ! ((uiA0) & UINT64_C( 0x4000000000000000 )) && ((uiA0) & UINT64_C( 0x3FFFFFFFFFFFFFFF )))
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#ifdef SOFTFLOAT_FAST_INT64
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/*----------------------------------------------------------------------------
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| The following functions are needed only when `SOFTFLOAT_FAST_INT64' is
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| defined.
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*----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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| Assuming the unsigned integer formed from concatenating `uiA64' and `uiA0'
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| has the bit pattern of an 80-bit extended floating-point NaN, converts
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| this NaN to the common NaN form, and stores the resulting common NaN at the
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| location pointed to by `zPtr'. If the NaN is a signaling NaN, the invalid
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| exception is raised.
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*----------------------------------------------------------------------------*/
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void
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softfloat_extF80UIToCommonNaN(
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uint_fast16_t uiA64, uint_fast64_t uiA0, struct commonNaN *zPtr );
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/*----------------------------------------------------------------------------
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| Converts the common NaN pointed to by `aPtr' into an 80-bit extended
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| floating-point NaN, and returns the bit pattern of this value as an unsigned
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| integer.
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*----------------------------------------------------------------------------*/
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struct uint128 softfloat_commonNaNToExtF80UI( const struct commonNaN *aPtr );
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/*----------------------------------------------------------------------------
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| Interpreting the unsigned integer formed from concatenating `uiA64' and
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| `uiA0' as an 80-bit extended floating-point value, and likewise interpreting
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| the unsigned integer formed from concatenating `uiB64' and `uiB0' as another
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| 80-bit extended floating-point value, and assuming at least on of these
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| floating-point values is a NaN, returns the bit pattern of the combined NaN
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| result. If either original floating-point value is a signaling NaN, the
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| invalid exception is raised.
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*----------------------------------------------------------------------------*/
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struct uint128
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softfloat_propagateNaNExtF80UI(
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uint_fast16_t uiA64,
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uint_fast64_t uiA0,
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uint_fast16_t uiB64,
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uint_fast64_t uiB0
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);
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/*----------------------------------------------------------------------------
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| The bit pattern for a default generated 128-bit floating-point NaN.
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*----------------------------------------------------------------------------*/
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#define defaultNaNF128UI64 UINT64_C( 0xFFFF800000000000 )
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#define defaultNaNF128UI0 UINT64_C( 0 )
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/*----------------------------------------------------------------------------
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| Returns true when the 128-bit unsigned integer formed from concatenating
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| 64-bit `uiA64' and 64-bit `uiA0' has the bit pattern of a 128-bit floating-
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| point signaling NaN.
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| Note: This macro evaluates its arguments more than once.
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*----------------------------------------------------------------------------*/
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#define softfloat_isSigNaNF128UI( uiA64, uiA0 ) ((((uiA64) & UINT64_C( 0x7FFF800000000000 )) == UINT64_C( 0x7FFF000000000000 )) && ((uiA0) || ((uiA64) & UINT64_C( 0x00007FFFFFFFFFFF ))))
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/*----------------------------------------------------------------------------
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| Assuming the unsigned integer formed from concatenating `uiA64' and `uiA0'
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| has the bit pattern of a 128-bit floating-point NaN, converts this NaN to
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| the common NaN form, and stores the resulting common NaN at the location
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| pointed to by `zPtr'. If the NaN is a signaling NaN, the invalid exception
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| is raised.
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*----------------------------------------------------------------------------*/
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void
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softfloat_f128UIToCommonNaN(
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uint_fast64_t uiA64, uint_fast64_t uiA0, struct commonNaN *zPtr );
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/*----------------------------------------------------------------------------
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| Converts the common NaN pointed to by `aPtr' into a 128-bit floating-point
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| NaN, and returns the bit pattern of this value as an unsigned integer.
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*----------------------------------------------------------------------------*/
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struct uint128 softfloat_commonNaNToF128UI( const struct commonNaN * );
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/*----------------------------------------------------------------------------
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| Interpreting the unsigned integer formed from concatenating `uiA64' and
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| `uiA0' as a 128-bit floating-point value, and likewise interpreting the
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| unsigned integer formed from concatenating `uiB64' and `uiB0' as another
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| 128-bit floating-point value, and assuming at least on of these floating-
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| point values is a NaN, returns the bit pattern of the combined NaN result.
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| If either original floating-point value is a signaling NaN, the invalid
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| exception is raised.
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*----------------------------------------------------------------------------*/
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struct uint128
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softfloat_propagateNaNF128UI(
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uint_fast64_t uiA64,
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uint_fast64_t uiA0,
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uint_fast64_t uiB64,
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uint_fast64_t uiB0
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);
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#else
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/*----------------------------------------------------------------------------
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| The following functions are needed only when `SOFTFLOAT_FAST_INT64' is not
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| defined.
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*----------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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| Assuming the 80-bit extended floating-point value pointed to by `aSPtr' is
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| a NaN, converts this NaN to the common NaN form, and stores the resulting
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| common NaN at the location pointed to by `zPtr'. If the NaN is a signaling
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| NaN, the invalid exception is raised.
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*----------------------------------------------------------------------------*/
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void
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softfloat_extF80MToCommonNaN(
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const struct extFloat80M *aSPtr, struct commonNaN *zPtr );
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/*----------------------------------------------------------------------------
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| Converts the common NaN pointed to by `aPtr' into an 80-bit extended
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| floating-point NaN, and stores this NaN at the location pointed to by
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| `zSPtr'.
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*----------------------------------------------------------------------------*/
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void
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softfloat_commonNaNToExtF80M(
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const struct commonNaN *aPtr, struct extFloat80M *zSPtr );
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/*----------------------------------------------------------------------------
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| Assuming at least one of the two 80-bit extended floating-point values
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| pointed to by `aSPtr' and `bSPtr' is a NaN, stores the combined NaN result
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| at the location pointed to by `zSPtr'. If either original floating-point
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| value is a signaling NaN, the invalid exception is raised.
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*----------------------------------------------------------------------------*/
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void
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softfloat_propagateNaNExtF80M(
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const struct extFloat80M *aSPtr,
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const struct extFloat80M *bSPtr,
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struct extFloat80M *zSPtr
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);
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/*----------------------------------------------------------------------------
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| The bit pattern for a default generated 128-bit floating-point NaN.
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*----------------------------------------------------------------------------*/
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#define defaultNaNF128UI96 0xFFFF8000
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#define defaultNaNF128UI64 0
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#define defaultNaNF128UI32 0
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#define defaultNaNF128UI0 0
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/*----------------------------------------------------------------------------
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| Assuming the 128-bit floating-point value pointed to by `aWPtr' is a NaN,
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| converts this NaN to the common NaN form, and stores the resulting common
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| NaN at the location pointed to by `zPtr'. If the NaN is a signaling NaN,
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| the invalid exception is raised. Argument `aWPtr' points to an array of
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| four 32-bit elements that concatenate in the platform's normal endian order
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| to form a 128-bit floating-point value.
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*----------------------------------------------------------------------------*/
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void
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softfloat_f128MToCommonNaN( const uint32_t *aWPtr, struct commonNaN *zPtr );
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/*----------------------------------------------------------------------------
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| Converts the common NaN pointed to by `aPtr' into a 128-bit floating-point
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| NaN, and stores this NaN at the location pointed to by `zWPtr'. Argument
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| `zWPtr' points to an array of four 32-bit elements that concatenate in the
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| platform's normal endian order to form a 128-bit floating-point value.
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*----------------------------------------------------------------------------*/
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void
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softfloat_commonNaNToF128M( const struct commonNaN *aPtr, uint32_t *zWPtr );
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/*----------------------------------------------------------------------------
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| Assuming at least one of the two 128-bit floating-point values pointed to by
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| `aWPtr' and `bWPtr' is a NaN, stores the combined NaN result at the location
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| pointed to by `zWPtr'. If either original floating-point value is a
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| signaling NaN, the invalid exception is raised. Each of `aWPtr', `bWPtr',
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| and `zWPtr' points to an array of four 32-bit elements that concatenate in
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| the platform's normal endian order to form a 128-bit floating-point value.
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*----------------------------------------------------------------------------*/
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void
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softfloat_propagateNaNF128M(
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const uint32_t *aWPtr, const uint32_t *bWPtr, uint32_t *zWPtr );
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#endif
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#endif
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