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Diffstat (limited to 'src/arch/arm/insts/fplib.hh')
-rw-r--r-- | src/arch/arm/insts/fplib.hh | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/src/arch/arm/insts/fplib.hh b/src/arch/arm/insts/fplib.hh new file mode 100644 index 000000000..6263687fc --- /dev/null +++ b/src/arch/arm/insts/fplib.hh @@ -0,0 +1,283 @@ +/* + * Copyright (c) 2012-2013 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * 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; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT + * OWNER 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. + * + * Authors: Edmund Grimley Evans + * Thomas Grocutt + */ + +/** + * @file + * Floating-point library code, which will gradually replace vfp.hh. For + * portability, this library does not use floating-point data types. Currently, + * C's standard integer types are used in the API, though this could be changed + * to something like class Fp32 { uint32_t x; }, etc. + */ + +#ifndef __ARCH_ARM_INSTS_FPLIB_HH__ +#define __ARCH_ARM_INSTS_FPLIB_HH__ + +#include <stdint.h> + +#include "arch/arm/miscregs.hh" + +namespace ArmISA +{ + +enum FPRounding { + FPRounding_TIEEVEN = 0, + FPRounding_POSINF = 1, + FPRounding_NEGINF = 2, + FPRounding_ZERO = 3, + FPRounding_TIEAWAY = 4, + FPRounding_ODD = 5 +}; + +static inline FPRounding +FPCRRounding(FPSCR &fpscr) +{ + return (FPRounding)((uint32_t)fpscr >> 22 & 3); +} + +/** Floating-point absolute value. */ +template <class T> +T fplibAbs(T op); +/** Floating-point add. */ +template <class T> +T fplibAdd(T op1, T op2, FPSCR &fpscr); +/** Floating-point compare (quiet and signaling). */ +template <class T> +int fplibCompare(T op1, T op2, bool signal_nans, FPSCR &fpscr); +/** Floating-point compare equal. */ +template <class T> +bool fplibCompareEQ(T op1, T op2, FPSCR &fpscr); +/** Floating-point compare greater than or equal. */ +template <class T> +bool fplibCompareGE(T op1, T op2, FPSCR &fpscr); +/** Floating-point compare greater than. */ +template <class T> +bool fplibCompareGT(T op1, T op2, FPSCR &fpscr); +/** Floating-point convert precision. */ +template <class T1, class T2> +T2 fplibConvert(T1 op, FPRounding rounding, FPSCR &fpscr); +/** Floating-point division. */ +template <class T> +T fplibDiv(T op1, T op2, FPSCR &fpscr); +/** Floating-point maximum. */ +template <class T> +T fplibMax(T op1, T op2, FPSCR &fpscr); +/** Floating-point maximum number. */ +template <class T> +T fplibMaxNum(T op1, T op2, FPSCR &fpscr); +/** Floating-point minimum. */ +template <class T> +T fplibMin(T op1, T op2, FPSCR &fpscr); +/** Floating-point minimum number. */ +template <class T> +T fplibMinNum(T op1, T op2, FPSCR &fpscr); +/** Floating-point multiply. */ +template <class T> +T fplibMul(T op1, T op2, FPSCR &fpscr); +/** Floating-point multiply-add. */ +template <class T> +T fplibMulAdd(T addend, T op1, T op2, FPSCR &fpscr); +/** Floating-point multiply extended. */ +template <class T> +T fplibMulX(T op1, T op2, FPSCR &fpscr); +/** Floating-point negate. */ +template <class T> +T fplibNeg(T op); +/** Floating-point reciprocal square root estimate. */ +template <class T> +T fplibRSqrtEstimate(T op, FPSCR &fpscr); +/** Floating-point reciprocal square root step. */ +template <class T> +T fplibRSqrtStepFused(T op1, T op2, FPSCR &fpscr); +/** Floating-point reciprocal estimate. */ +template <class T> +T fplibRecipEstimate(T op, FPSCR &fpscr); +/** Floating-point reciprocal step. */ +template <class T> +T fplibRecipStepFused(T op1, T op2, FPSCR &fpscr); +/** Floating-point reciprocal exponent. */ +template <class T> +T fplibRecpX(T op, FPSCR &fpscr); +/** Floating-point convert to integer. */ +template <class T> +T fplibRoundInt(T op, FPRounding rounding, bool exact, FPSCR &fpscr); +/** Floating-point square root. */ +template <class T> +T fplibSqrt(T op, FPSCR &fpscr); +/** Floating-point subtract. */ +template <class T> +T fplibSub(T op1, T op2, FPSCR &fpscr); +/** Floating-point convert to fixed-point. */ +template <class T1, class T2> +T2 fplibFPToFixed(T1 op, int fbits, bool u, FPRounding rounding, FPSCR &fpscr); +/** Floating-point convert from fixed-point. */ +template <class T> +T fplibFixedToFP(uint64_t op, int fbits, bool u, FPRounding rounding, + FPSCR &fpscr); + +/* Function specializations... */ +template <> +uint32_t fplibAbs(uint32_t op); +template <> +uint64_t fplibAbs(uint64_t op); +template <> +uint32_t fplibAdd(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibAdd(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +int fplibCompare(uint32_t op1, uint32_t op2, bool signal_nans, FPSCR &fpscr); +template <> +int fplibCompare(uint64_t op1, uint64_t op2, bool signal_nans, FPSCR &fpscr); +template <> +bool fplibCompareEQ(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +bool fplibCompareEQ(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +bool fplibCompareGE(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +bool fplibCompareGE(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +bool fplibCompareGT(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +bool fplibCompareGT(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint16_t fplibConvert(uint32_t op, FPRounding rounding, FPSCR &fpscr); +template <> +uint16_t fplibConvert(uint64_t op, FPRounding rounding, FPSCR &fpscr); +template <> +uint32_t fplibConvert(uint16_t op, FPRounding rounding, FPSCR &fpscr); +template <> +uint32_t fplibConvert(uint64_t op, FPRounding rounding, FPSCR &fpscr); +template <> +uint64_t fplibConvert(uint16_t op, FPRounding rounding, FPSCR &fpscr); +template <> +uint64_t fplibConvert(uint32_t op, FPRounding rounding, FPSCR &fpscr); +template <> +uint32_t fplibDiv(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibDiv(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibMax(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibMax(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibMaxNum(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibMaxNum(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibMin(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibMin(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibMinNum(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibMinNum(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibMul(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibMul(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibMulAdd(uint32_t addend, uint32_t op1, uint32_t op2, + FPSCR &fpscr); +template <> +uint64_t fplibMulAdd(uint64_t addend, uint64_t op1, uint64_t op2, + FPSCR &fpscr); +template <> +uint32_t fplibMulX(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibMulX(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibNeg(uint32_t op); +template <> +uint64_t fplibNeg(uint64_t op); +template <> +uint32_t fplibRSqrtEstimate(uint32_t op, FPSCR &fpscr); +template<> +uint64_t fplibRSqrtEstimate(uint64_t op, FPSCR &fpscr); +template <> +uint32_t fplibRSqrtStepFused(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibRSqrtStepFused(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibRecipEstimate(uint32_t op, FPSCR &fpscr); +template <> +uint64_t fplibRecipEstimate(uint64_t op, FPSCR &fpscr); +template <> +uint32_t fplibRecipStepFused(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibRecipStepFused(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibRecpX(uint32_t op, FPSCR &fpscr); +template <> +uint64_t fplibRecpX(uint64_t op, FPSCR &fpscr); +template <> +uint32_t fplibRoundInt(uint32_t op, FPRounding rounding, bool exact, + FPSCR &fpscr); +template <> +uint64_t fplibRoundInt(uint64_t op, FPRounding rounding, bool exact, + FPSCR &fpscr); +template <> +uint32_t fplibSqrt(uint32_t op, FPSCR &fpscr); +template <> +uint64_t fplibSqrt(uint64_t op, FPSCR &fpscr); +template <> +uint32_t fplibSub(uint32_t op1, uint32_t op2, FPSCR &fpscr); +template <> +uint64_t fplibSub(uint64_t op1, uint64_t op2, FPSCR &fpscr); +template <> +uint32_t fplibFPToFixed(uint32_t op, int fbits, bool u, FPRounding rounding, + FPSCR &fpscr); +template <> +uint32_t fplibFPToFixed(uint64_t op, int fbits, bool u, FPRounding rounding, + FPSCR &fpscr); +template <> +uint64_t fplibFPToFixed(uint32_t op, int fbits, bool u, FPRounding rounding, + FPSCR &fpscr); +template <> +uint64_t fplibFPToFixed(uint64_t op, int fbits, bool u, FPRounding rounding, + FPSCR &fpscr); +template <> +uint32_t fplibFixedToFP(uint64_t op, int fbits, bool u, FPRounding rounding, + FPSCR &fpscr); +template <> +uint64_t fplibFixedToFP(uint64_t op, int fbits, bool u, FPRounding rounding, + FPSCR &fpscr); +} + +#endif |