Eyck Jentzsch
dcaf5467e8
(http://www.jhauser.us/arithmetic/SoftFloat.html) with RISCV specialization and cmake build
279 lines
11 KiB
C
279 lines
11 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 3e, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017 The Regents of the
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University of California. All rights reserved.
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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 met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the University nor the names of its contributors may
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be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING 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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#ifndef internals_h
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#define internals_h 1
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#include <stdbool.h>
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#include <stdint.h>
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#include "primitives.h"
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#include "softfloat_types.h"
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union ui16_f16 { uint16_t ui; float16_t f; };
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union ui32_f32 { uint32_t ui; float32_t f; };
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union ui64_f64 { uint64_t ui; float64_t f; };
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#ifdef SOFTFLOAT_FAST_INT64
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union extF80M_extF80 { struct extFloat80M fM; extFloat80_t f; };
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union ui128_f128 { struct uint128 ui; float128_t f; };
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#endif
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enum {
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softfloat_mulAdd_subC = 1,
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softfloat_mulAdd_subProd = 2
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};
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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uint_fast32_t softfloat_roundToUI32( bool, uint_fast64_t, uint_fast8_t, bool );
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#ifdef SOFTFLOAT_FAST_INT64
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uint_fast64_t
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softfloat_roundToUI64(
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bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool );
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#else
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uint_fast64_t softfloat_roundMToUI64( bool, uint32_t *, uint_fast8_t, bool );
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#endif
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int_fast32_t softfloat_roundToI32( bool, uint_fast64_t, uint_fast8_t, bool );
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#ifdef SOFTFLOAT_FAST_INT64
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int_fast64_t
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softfloat_roundToI64(
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bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool );
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#else
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int_fast64_t softfloat_roundMToI64( bool, uint32_t *, uint_fast8_t, bool );
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#endif
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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#define signF16UI( a ) ((bool) ((uint16_t) (a)>>15))
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#define expF16UI( a ) ((int_fast8_t) ((a)>>10) & 0x1F)
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#define fracF16UI( a ) ((a) & 0x03FF)
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#define packToF16UI( sign, exp, sig ) (((uint16_t) (sign)<<15) + ((uint16_t) (exp)<<10) + (sig))
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#define isNaNF16UI( a ) (((~(a) & 0x7C00) == 0) && ((a) & 0x03FF))
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struct exp8_sig16 { int_fast8_t exp; uint_fast16_t sig; };
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struct exp8_sig16 softfloat_normSubnormalF16Sig( uint_fast16_t );
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float16_t softfloat_roundPackToF16( bool, int_fast16_t, uint_fast16_t );
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float16_t softfloat_normRoundPackToF16( bool, int_fast16_t, uint_fast16_t );
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float16_t softfloat_addMagsF16( uint_fast16_t, uint_fast16_t );
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float16_t softfloat_subMagsF16( uint_fast16_t, uint_fast16_t );
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float16_t
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softfloat_mulAddF16(
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uint_fast16_t, uint_fast16_t, uint_fast16_t, uint_fast8_t );
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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#define signF32UI( a ) ((bool) ((uint32_t) (a)>>31))
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#define expF32UI( a ) ((int_fast16_t) ((a)>>23) & 0xFF)
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#define fracF32UI( a ) ((a) & 0x007FFFFF)
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#define packToF32UI( sign, exp, sig ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<23) + (sig))
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#define isNaNF32UI( a ) (((~(a) & 0x7F800000) == 0) && ((a) & 0x007FFFFF))
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struct exp16_sig32 { int_fast16_t exp; uint_fast32_t sig; };
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struct exp16_sig32 softfloat_normSubnormalF32Sig( uint_fast32_t );
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float32_t softfloat_roundPackToF32( bool, int_fast16_t, uint_fast32_t );
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float32_t softfloat_normRoundPackToF32( bool, int_fast16_t, uint_fast32_t );
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float32_t softfloat_addMagsF32( uint_fast32_t, uint_fast32_t );
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float32_t softfloat_subMagsF32( uint_fast32_t, uint_fast32_t );
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float32_t
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softfloat_mulAddF32(
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uint_fast32_t, uint_fast32_t, uint_fast32_t, uint_fast8_t );
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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#define signF64UI( a ) ((bool) ((uint64_t) (a)>>63))
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#define expF64UI( a ) ((int_fast16_t) ((a)>>52) & 0x7FF)
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#define fracF64UI( a ) ((a) & UINT64_C( 0x000FFFFFFFFFFFFF ))
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#define packToF64UI( sign, exp, sig ) ((uint64_t) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<52) + (sig)))
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#define isNaNF64UI( a ) (((~(a) & UINT64_C( 0x7FF0000000000000 )) == 0) && ((a) & UINT64_C( 0x000FFFFFFFFFFFFF )))
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struct exp16_sig64 { int_fast16_t exp; uint_fast64_t sig; };
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struct exp16_sig64 softfloat_normSubnormalF64Sig( uint_fast64_t );
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float64_t softfloat_roundPackToF64( bool, int_fast16_t, uint_fast64_t );
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float64_t softfloat_normRoundPackToF64( bool, int_fast16_t, uint_fast64_t );
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float64_t softfloat_addMagsF64( uint_fast64_t, uint_fast64_t, bool );
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float64_t softfloat_subMagsF64( uint_fast64_t, uint_fast64_t, bool );
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float64_t
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softfloat_mulAddF64(
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uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast8_t );
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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#define signExtF80UI64( a64 ) ((bool) ((uint16_t) (a64)>>15))
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#define expExtF80UI64( a64 ) ((a64) & 0x7FFF)
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#define packToExtF80UI64( sign, exp ) ((uint_fast16_t) (sign)<<15 | (exp))
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#define isNaNExtF80UI( a64, a0 ) ((((a64) & 0x7FFF) == 0x7FFF) && ((a0) & UINT64_C( 0x7FFFFFFFFFFFFFFF )))
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#ifdef SOFTFLOAT_FAST_INT64
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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struct exp32_sig64 { int_fast32_t exp; uint64_t sig; };
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struct exp32_sig64 softfloat_normSubnormalExtF80Sig( uint_fast64_t );
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extFloat80_t
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softfloat_roundPackToExtF80(
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bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t );
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extFloat80_t
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softfloat_normRoundPackToExtF80(
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bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t );
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extFloat80_t
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softfloat_addMagsExtF80(
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uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool );
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extFloat80_t
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softfloat_subMagsExtF80(
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uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool );
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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#define signF128UI64( a64 ) ((bool) ((uint64_t) (a64)>>63))
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#define expF128UI64( a64 ) ((int_fast32_t) ((a64)>>48) & 0x7FFF)
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#define fracF128UI64( a64 ) ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF ))
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#define packToF128UI64( sign, exp, sig64 ) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<48) + (sig64))
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#define isNaNF128UI( a64, a0 ) (((~(a64) & UINT64_C( 0x7FFF000000000000 )) == 0) && (a0 || ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF ))))
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struct exp32_sig128 { int_fast32_t exp; struct uint128 sig; };
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struct exp32_sig128
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softfloat_normSubnormalF128Sig( uint_fast64_t, uint_fast64_t );
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float128_t
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softfloat_roundPackToF128(
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bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast64_t );
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float128_t
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softfloat_normRoundPackToF128(
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bool, int_fast32_t, uint_fast64_t, uint_fast64_t );
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float128_t
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softfloat_addMagsF128(
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uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool );
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float128_t
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softfloat_subMagsF128(
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uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool );
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float128_t
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softfloat_mulAddF128(
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uint_fast64_t,
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uint_fast64_t,
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uint_fast64_t,
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uint_fast64_t,
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uint_fast64_t,
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uint_fast64_t,
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uint_fast8_t
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);
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#else
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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bool
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softfloat_tryPropagateNaNExtF80M(
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const struct extFloat80M *,
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const struct extFloat80M *,
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struct extFloat80M *
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);
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void softfloat_invalidExtF80M( struct extFloat80M * );
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int softfloat_normExtF80SigM( uint64_t * );
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void
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softfloat_roundPackMToExtF80M(
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bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * );
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void
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softfloat_normRoundPackMToExtF80M(
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bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * );
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void
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softfloat_addExtF80M(
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const struct extFloat80M *,
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const struct extFloat80M *,
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struct extFloat80M *,
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bool
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);
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int
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softfloat_compareNonnormExtF80M(
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const struct extFloat80M *, const struct extFloat80M * );
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/*----------------------------------------------------------------------------
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*----------------------------------------------------------------------------*/
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#define signF128UI96( a96 ) ((bool) ((uint32_t) (a96)>>31))
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#define expF128UI96( a96 ) ((int32_t) ((a96)>>16) & 0x7FFF)
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#define fracF128UI96( a96 ) ((a96) & 0x0000FFFF)
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#define packToF128UI96( sign, exp, sig96 ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<16) + (sig96))
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bool softfloat_isNaNF128M( const uint32_t * );
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bool
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softfloat_tryPropagateNaNF128M(
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const uint32_t *, const uint32_t *, uint32_t * );
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void softfloat_invalidF128M( uint32_t * );
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int softfloat_shiftNormSigF128M( const uint32_t *, uint_fast8_t, uint32_t * );
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void softfloat_roundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * );
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void softfloat_normRoundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * );
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void
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softfloat_addF128M( const uint32_t *, const uint32_t *, uint32_t *, bool );
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void
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softfloat_mulAddF128M(
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const uint32_t *,
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const uint32_t *,
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const uint32_t *,
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uint32_t *,
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uint_fast8_t
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);
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#endif
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#endif
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