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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 42 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190524100845.259718220@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
363 lines
12 KiB
C
363 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Linux/PA-RISC Project (http://www.parisc-linux.org/)
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*
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* Floating-point emulation code
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* Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
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*/
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#ifdef __NO_PA_HDRS
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PA header file -- do not include this header file for non-PA builds.
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#endif
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/*
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* Some more constants
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*/
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#define SGL_FX_MAX_EXP 30
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#define DBL_FX_MAX_EXP 62
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#define QUAD_FX_MAX_EXP 126
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#define Dintp1(object) (object)
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#define Dintp2(object) (object)
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#define Duintp1(object) (object)
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#define Duintp2(object) (object)
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#define Qintp0(object) (object)
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#define Qintp1(object) (object)
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#define Qintp2(object) (object)
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#define Qintp3(object) (object)
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/*
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* These macros will be used specifically by the convert instructions.
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*
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*
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* Single format macros
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*/
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#define Sgl_to_dbl_exponent(src_exponent,dest) \
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Deposit_dexponent(dest,src_exponent+(DBL_BIAS-SGL_BIAS))
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#define Sgl_to_dbl_mantissa(src_mantissa,destA,destB) \
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Deposit_dmantissap1(destA,src_mantissa>>3); \
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Dmantissap2(destB) = src_mantissa << 29
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#define Sgl_isinexact_to_fix(sgl_value,exponent) \
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((exponent < (SGL_P - 1)) ? \
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(Sall(sgl_value) << (SGL_EXP_LENGTH + 1 + exponent)) : FALSE)
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#define Int_isinexact_to_sgl(int_value) (int_value << 33 - SGL_EXP_LENGTH)
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#define Sgl_roundnearest_from_int(int_value,sgl_value) \
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if (int_value & 1<<(SGL_EXP_LENGTH - 2)) /* round bit */ \
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if ((int_value << 34 - SGL_EXP_LENGTH) || Slow(sgl_value)) \
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Sall(sgl_value)++
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#define Dint_isinexact_to_sgl(dint_valueA,dint_valueB) \
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((Dintp1(dint_valueA) << 33 - SGL_EXP_LENGTH) || Dintp2(dint_valueB))
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#define Sgl_roundnearest_from_dint(dint_valueA,dint_valueB,sgl_value) \
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if (Dintp1(dint_valueA) & 1<<(SGL_EXP_LENGTH - 2)) \
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if ((Dintp1(dint_valueA) << 34 - SGL_EXP_LENGTH) || \
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Dintp2(dint_valueB) || Slow(sgl_value)) Sall(sgl_value)++
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#define Dint_isinexact_to_dbl(dint_value) \
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(Dintp2(dint_value) << 33 - DBL_EXP_LENGTH)
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#define Dbl_roundnearest_from_dint(dint_opndB,dbl_opndA,dbl_opndB) \
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if (Dintp2(dint_opndB) & 1<<(DBL_EXP_LENGTH - 2)) \
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if ((Dintp2(dint_opndB) << 34 - DBL_EXP_LENGTH) || Dlowp2(dbl_opndB)) \
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if ((++Dallp2(dbl_opndB))==0) Dallp1(dbl_opndA)++
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#define Sgl_isone_roundbit(sgl_value,exponent) \
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((Sall(sgl_value) << (SGL_EXP_LENGTH + 1 + exponent)) >> 31)
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#define Sgl_isone_stickybit(sgl_value,exponent) \
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(exponent < (SGL_P - 2) ? \
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Sall(sgl_value) << (SGL_EXP_LENGTH + 2 + exponent) : FALSE)
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/*
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* Double format macros
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*/
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#define Dbl_to_sgl_exponent(src_exponent,dest) \
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dest = src_exponent + (SGL_BIAS - DBL_BIAS)
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#define Dbl_to_sgl_mantissa(srcA,srcB,dest,inexact,guard,sticky,odd) \
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Shiftdouble(Dmantissap1(srcA),Dmantissap2(srcB),29,dest); \
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guard = Dbit3p2(srcB); \
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sticky = Dallp2(srcB)<<4; \
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inexact = guard | sticky; \
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odd = Dbit2p2(srcB)
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#define Dbl_to_sgl_denormalized(srcA,srcB,exp,dest,inexact,guard,sticky,odd,tiny) \
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Deposit_dexponent(srcA,1); \
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tiny = TRUE; \
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if (exp >= -2) { \
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if (exp == 0) { \
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inexact = Dallp2(srcB) << 3; \
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guard = inexact >> 31; \
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sticky = inexact << 1; \
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Shiftdouble(Dmantissap1(srcA),Dmantissap2(srcB),29,dest); \
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odd = dest << 31; \
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if (inexact) { \
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switch(Rounding_mode()) { \
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case ROUNDPLUS: \
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if (Dbl_iszero_sign(srcA)) { \
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dest++; \
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if (Sgl_isone_hidden(dest)) \
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tiny = FALSE; \
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dest--; \
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} \
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break; \
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case ROUNDMINUS: \
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if (Dbl_isone_sign(srcA)) { \
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dest++; \
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if (Sgl_isone_hidden(dest)) \
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tiny = FALSE; \
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dest--; \
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} \
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break; \
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case ROUNDNEAREST: \
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if (guard && (sticky || odd)) { \
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dest++; \
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if (Sgl_isone_hidden(dest)) \
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tiny = FALSE; \
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dest--; \
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} \
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break; \
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} \
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} \
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/* shift right by one to get correct result */ \
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guard = odd; \
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sticky = inexact; \
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inexact |= guard; \
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dest >>= 1; \
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Deposit_dsign(srcA,0); \
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Shiftdouble(Dallp1(srcA),Dallp2(srcB),30,dest); \
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odd = dest << 31; \
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} \
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else { \
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inexact = Dallp2(srcB) << (2 + exp); \
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guard = inexact >> 31; \
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sticky = inexact << 1; \
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Deposit_dsign(srcA,0); \
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if (exp == -2) dest = Dallp1(srcA); \
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else Variable_shift_double(Dallp1(srcA),Dallp2(srcB),30-exp,dest); \
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odd = dest << 31; \
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} \
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} \
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else { \
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Deposit_dsign(srcA,0); \
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if (exp > (1 - SGL_P)) { \
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dest = Dallp1(srcA) >> (- 2 - exp); \
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inexact = Dallp1(srcA) << (34 + exp); \
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guard = inexact >> 31; \
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sticky = (inexact << 1) | Dallp2(srcB); \
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inexact |= Dallp2(srcB); \
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odd = dest << 31; \
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} \
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else { \
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dest = 0; \
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inexact = Dallp1(srcA) | Dallp2(srcB); \
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if (exp == (1 - SGL_P)) { \
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guard = Dhidden(srcA); \
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sticky = Dmantissap1(srcA) | Dallp2(srcB); \
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} \
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else { \
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guard = 0; \
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sticky = inexact; \
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} \
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odd = 0; \
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} \
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} \
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exp = 0
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#define Dbl_isinexact_to_fix(dbl_valueA,dbl_valueB,exponent) \
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(exponent < (DBL_P-33) ? \
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Dallp2(dbl_valueB) || Dallp1(dbl_valueA) << (DBL_EXP_LENGTH+1+exponent) : \
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(exponent < (DBL_P-1) ? Dallp2(dbl_valueB) << (exponent + (33-DBL_P)) : \
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FALSE))
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#define Dbl_isoverflow_to_int(exponent,dbl_valueA,dbl_valueB) \
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((exponent > SGL_FX_MAX_EXP + 1) || Dsign(dbl_valueA)==0 || \
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Dmantissap1(dbl_valueA)!=0 || (Dallp2(dbl_valueB)>>21)!=0 )
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#define Dbl_isone_roundbit(dbl_valueA,dbl_valueB,exponent) \
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((exponent < (DBL_P - 33) ? \
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Dallp1(dbl_valueA) >> ((30 - DBL_EXP_LENGTH) - exponent) : \
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Dallp2(dbl_valueB) >> ((DBL_P - 2) - exponent)) & 1)
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#define Dbl_isone_stickybit(dbl_valueA,dbl_valueB,exponent) \
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(exponent < (DBL_P-34) ? \
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(Dallp2(dbl_valueB) || Dallp1(dbl_valueA)<<(DBL_EXP_LENGTH+2+exponent)) : \
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(exponent<(DBL_P-2) ? (Dallp2(dbl_valueB) << (exponent + (34-DBL_P))) : \
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FALSE))
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/* Int macros */
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#define Int_from_sgl_mantissa(sgl_value,exponent) \
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Sall(sgl_value) = \
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(unsigned)(Sall(sgl_value) << SGL_EXP_LENGTH)>>(31 - exponent)
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#define Int_from_dbl_mantissa(dbl_valueA,dbl_valueB,exponent) \
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Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),22,Dallp1(dbl_valueA)); \
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if (exponent < 31) Dallp1(dbl_valueA) >>= 30 - exponent; \
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else Dallp1(dbl_valueA) <<= 1
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#define Int_negate(int_value) int_value = -int_value
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/* Dint macros */
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#define Dint_from_sgl_mantissa(sgl_value,exponent,dresultA,dresultB) \
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{Sall(sgl_value) <<= SGL_EXP_LENGTH; /* left-justify */ \
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if (exponent <= 31) { \
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Dintp1(dresultA) = 0; \
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Dintp2(dresultB) = (unsigned)Sall(sgl_value) >> (31 - exponent); \
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} \
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else { \
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Dintp1(dresultA) = Sall(sgl_value) >> (63 - exponent); \
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Dintp2(dresultB) = Sall(sgl_value) << (exponent - 31); \
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}}
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#define Dint_from_dbl_mantissa(dbl_valueA,dbl_valueB,exponent,destA,destB) \
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{if (exponent < 32) { \
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Dintp1(destA) = 0; \
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if (exponent <= 20) \
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Dintp2(destB) = Dallp1(dbl_valueA) >> 20-exponent; \
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else Variable_shift_double(Dallp1(dbl_valueA),Dallp2(dbl_valueB), \
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52-exponent,Dintp2(destB)); \
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} \
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else { \
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if (exponent <= 52) { \
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Dintp1(destA) = Dallp1(dbl_valueA) >> 52-exponent; \
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if (exponent == 52) Dintp2(destB) = Dallp2(dbl_valueB); \
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else Variable_shift_double(Dallp1(dbl_valueA),Dallp2(dbl_valueB), \
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52-exponent,Dintp2(destB)); \
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} \
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else { \
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Variable_shift_double(Dallp1(dbl_valueA),Dallp2(dbl_valueB), \
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84-exponent,Dintp1(destA)); \
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Dintp2(destB) = Dallp2(dbl_valueB) << exponent-52; \
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} \
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}}
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#define Dint_setzero(dresultA,dresultB) \
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Dintp1(dresultA) = 0; \
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Dintp2(dresultB) = 0
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#define Dint_setone_sign(dresultA,dresultB) \
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Dintp1(dresultA) = ~Dintp1(dresultA); \
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if ((Dintp2(dresultB) = -Dintp2(dresultB)) == 0) Dintp1(dresultA)++
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#define Dint_set_minint(dresultA,dresultB) \
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Dintp1(dresultA) = (unsigned int)1<<31; \
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Dintp2(dresultB) = 0
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#define Dint_isone_lowp2(dresultB) (Dintp2(dresultB) & 01)
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#define Dint_increment(dresultA,dresultB) \
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if ((++Dintp2(dresultB))==0) Dintp1(dresultA)++
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#define Dint_decrement(dresultA,dresultB) \
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if ((Dintp2(dresultB)--)==0) Dintp1(dresultA)--
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#define Dint_negate(dresultA,dresultB) \
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Dintp1(dresultA) = ~Dintp1(dresultA); \
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if ((Dintp2(dresultB) = -Dintp2(dresultB))==0) Dintp1(dresultA)++
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#define Dint_copyfromptr(src,destA,destB) \
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Dintp1(destA) = src->wd0; \
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Dintp2(destB) = src->wd1
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#define Dint_copytoptr(srcA,srcB,dest) \
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dest->wd0 = Dintp1(srcA); \
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dest->wd1 = Dintp2(srcB)
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/* other macros */
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#define Find_ms_one_bit(value, position) \
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{ \
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int var; \
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for (var=8; var >=1; var >>= 1) { \
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if (value >> 32 - position) \
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position -= var; \
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else position += var; \
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} \
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if ((value >> 32 - position) == 0) \
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position--; \
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else position -= 2; \
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}
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/*
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* Unsigned int macros
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*/
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#define Duint_copyfromptr(src,destA,destB) \
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Dint_copyfromptr(src,destA,destB)
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#define Duint_copytoptr(srcA,srcB,dest) \
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Dint_copytoptr(srcA,srcB,dest)
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#define Suint_isinexact_to_sgl(int_value) \
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(int_value << 32 - SGL_EXP_LENGTH)
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#define Sgl_roundnearest_from_suint(suint_value,sgl_value) \
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if (suint_value & 1<<(SGL_EXP_LENGTH - 1)) /* round bit */ \
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if ((suint_value << 33 - SGL_EXP_LENGTH) || Slow(sgl_value)) \
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Sall(sgl_value)++
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#define Duint_isinexact_to_sgl(duint_valueA,duint_valueB) \
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((Duintp1(duint_valueA) << 32 - SGL_EXP_LENGTH) || Duintp2(duint_valueB))
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#define Sgl_roundnearest_from_duint(duint_valueA,duint_valueB,sgl_value) \
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if (Duintp1(duint_valueA) & 1<<(SGL_EXP_LENGTH - 1)) \
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if ((Duintp1(duint_valueA) << 33 - SGL_EXP_LENGTH) || \
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Duintp2(duint_valueB) || Slow(sgl_value)) Sall(sgl_value)++
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#define Duint_isinexact_to_dbl(duint_value) \
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(Duintp2(duint_value) << 32 - DBL_EXP_LENGTH)
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#define Dbl_roundnearest_from_duint(duint_opndB,dbl_opndA,dbl_opndB) \
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if (Duintp2(duint_opndB) & 1<<(DBL_EXP_LENGTH - 1)) \
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if ((Duintp2(duint_opndB) << 33 - DBL_EXP_LENGTH) || Dlowp2(dbl_opndB)) \
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if ((++Dallp2(dbl_opndB))==0) Dallp1(dbl_opndA)++
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#define Suint_from_sgl_mantissa(src,exponent,result) \
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Sall(result) = (unsigned)(Sall(src) << SGL_EXP_LENGTH)>>(31 - exponent)
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#define Sgl_isinexact_to_unsigned(sgl_value,exponent) \
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Sgl_isinexact_to_fix(sgl_value,exponent)
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#define Duint_from_sgl_mantissa(sgl_value,exponent,dresultA,dresultB) \
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{unsigned int val = Sall(sgl_value) << SGL_EXP_LENGTH; \
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if (exponent <= 31) { \
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Dintp1(dresultA) = 0; \
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Dintp2(dresultB) = val >> (31 - exponent); \
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} \
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else { \
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Dintp1(dresultA) = val >> (63 - exponent); \
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Dintp2(dresultB) = exponent <= 62 ? val << (exponent - 31) : 0; \
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} \
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}
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#define Duint_setzero(dresultA,dresultB) \
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Dint_setzero(dresultA,dresultB)
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#define Duint_increment(dresultA,dresultB) Dint_increment(dresultA,dresultB)
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#define Duint_isone_lowp2(dresultB) Dint_isone_lowp2(dresultB)
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#define Suint_from_dbl_mantissa(srcA,srcB,exponent,dest) \
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Shiftdouble(Dallp1(srcA),Dallp2(srcB),21,dest); \
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dest = (unsigned)dest >> 31 - exponent
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#define Dbl_isinexact_to_unsigned(dbl_valueA,dbl_valueB,exponent) \
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Dbl_isinexact_to_fix(dbl_valueA,dbl_valueB,exponent)
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#define Duint_from_dbl_mantissa(dbl_valueA,dbl_valueB,exponent,destA,destB) \
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Dint_from_dbl_mantissa(dbl_valueA,dbl_valueB,exponent,destA,destB)
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