/* $OpenBSD: sgl_float.h,v 1.6 2002/03/14 01:26:32 millert Exp $ */ /* * Copyright 1996 1995 by Open Software Foundation, Inc. * All Rights Reserved * * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby granted, * provided that the above copyright notice appears in all copies and * that both the copyright notice and this permission notice appear in * supporting documentation. * * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. * * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * pmk1.1 */ /* * (c) Copyright 1986 HEWLETT-PACKARD COMPANY * * To anyone who acknowledges that this file is provided "AS IS" * without any express or implied warranty: * permission to use, copy, modify, and distribute this file * for any purpose is hereby granted without fee, provided that * the above copyright notice and this notice appears in all * copies, and that the name of Hewlett-Packard Company not be * used in advertising or publicity pertaining to distribution * of the software without specific, written prior permission. * Hewlett-Packard Company makes no representations about the * suitability of this software for any purpose. */ #include /****************************** * Single precision functions * ******************************/ /* 32-bit word grabing functions */ #define Sgl_firstword(value) Sall(value) #define Sgl_secondword(value) dummy_location #define Sgl_thirdword(value) dummy_location #define Sgl_fourthword(value) dummy_location #define Sgl_sign(object) Ssign(object) #define Sgl_exponent(object) Sexponent(object) #define Sgl_signexponent(object) Ssignexponent(object) #define Sgl_mantissa(object) Smantissa(object) #define Sgl_exponentmantissa(object) Sexponentmantissa(object) #define Sgl_all(object) Sall(object) /* sgl_and_signs ands the sign bits of each argument and puts the result * into the first argument. sgl_or_signs ors those same sign bits */ #define Sgl_and_signs( src1dst, src2) \ Sall(src1dst) = (Sall(src2)|~(1<<31)) & Sall(src1dst) #define Sgl_or_signs( src1dst, src2) \ Sall(src1dst) = (Sall(src2)&(1<<31)) | Sall(src1dst) /* The hidden bit is always the low bit of the exponent */ #define Sgl_clear_exponent_set_hidden(srcdst) Deposit_sexponent(srcdst,1) #define Sgl_clear_signexponent_set_hidden(srcdst) \ Deposit_ssignexponent(srcdst,1) #define Sgl_clear_sign(srcdst) Sall(srcdst) &= ~(1<<31) #define Sgl_clear_signexponent(srcdst) Sall(srcdst) &= 0x007fffff /* varamount must be less than 32 for the next three functions */ #define Sgl_rightshift(srcdst, varamount) \ Sall(srcdst) >>= varamount #define Sgl_leftshift(srcdst, varamount) \ Sall(srcdst) <<= varamount #define Sgl_rightshift_exponentmantissa(srcdst, varamount) \ Sall(srcdst) = \ (Sexponentmantissa(srcdst) >> (varamount)) | (Sall(srcdst) & (1<<31)) #define Sgl_leftshiftby1_withextent(left,right,result) \ Shiftdouble(Sall(left),Extall(right),31,Sall(result)) #define Sgl_rightshiftby1_withextent(left,right,dst) \ Shiftdouble(Sall(left),Extall(right),1,Extall(right)) #define Sgl_arithrightshiftby1(srcdst) \ Sall(srcdst) = (int)Sall(srcdst) >> 1 /* Sign extend the sign bit with an integer destination */ #define Sgl_signextendedsign(value) Ssignedsign(value) #define Sgl_isone_hidden(sgl_value) (Shidden(sgl_value)) #define Sgl_increment(sgl_value) Sall(sgl_value) += 1 #define Sgl_increment_mantissa(sgl_value) \ Deposit_smantissa(sgl_value,sgl_value+1) #define Sgl_decrement(sgl_value) Sall(sgl_value) -= 1 #define Sgl_isone_sign(sgl_value) (Is_ssign(sgl_value)!=0) #define Sgl_isone_hiddenoverflow(sgl_value) \ (Is_shiddenoverflow(sgl_value)!=0) #define Sgl_isone_lowmantissa(sgl_value) (Is_slow(sgl_value)!=0) #define Sgl_isone_signaling(sgl_value) (Is_ssignaling(sgl_value)!=0) #define Sgl_is_signalingnan(sgl_value) (Ssignalingnan(sgl_value)==0x1ff) #define Sgl_isnotzero(sgl_value) (Sall(sgl_value)!=0) #define Sgl_isnotzero_hiddenhigh7mantissa(sgl_value) \ (Shiddenhigh7mantissa(sgl_value)!=0) #define Sgl_isnotzero_low4(sgl_value) (Slow4(sgl_value)!=0) #define Sgl_isnotzero_exponent(sgl_value) (Sexponent(sgl_value)!=0) #define Sgl_isnotzero_mantissa(sgl_value) (Smantissa(sgl_value)!=0) #define Sgl_isnotzero_exponentmantissa(sgl_value) \ (Sexponentmantissa(sgl_value)!=0) #define Sgl_iszero(sgl_value) (Sall(sgl_value)==0) #define Sgl_iszero_signaling(sgl_value) (Is_ssignaling(sgl_value)==0) #define Sgl_iszero_hidden(sgl_value) (Is_shidden(sgl_value)==0) #define Sgl_iszero_hiddenoverflow(sgl_value) \ (Is_shiddenoverflow(sgl_value)==0) #define Sgl_iszero_hiddenhigh3mantissa(sgl_value) \ (Shiddenhigh3mantissa(sgl_value)==0) #define Sgl_iszero_hiddenhigh7mantissa(sgl_value) \ (Shiddenhigh7mantissa(sgl_value)==0) #define Sgl_iszero_sign(sgl_value) (Is_ssign(sgl_value)==0) #define Sgl_iszero_exponent(sgl_value) (Sexponent(sgl_value)==0) #define Sgl_iszero_mantissa(sgl_value) (Smantissa(sgl_value)==0) #define Sgl_iszero_exponentmantissa(sgl_value) \ (Sexponentmantissa(sgl_value)==0) #define Sgl_isinfinity_exponent(sgl_value) \ (Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT) #define Sgl_isnotinfinity_exponent(sgl_value) \ (Sgl_exponent(sgl_value)!=SGL_INFINITY_EXPONENT) #define Sgl_isinfinity(sgl_value) \ (Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT && \ Sgl_mantissa(sgl_value)==0) #define Sgl_isnan(sgl_value) \ (Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT && \ Sgl_mantissa(sgl_value)!=0) #define Sgl_isnotnan(sgl_value) \ (Sgl_exponent(sgl_value)!=SGL_INFINITY_EXPONENT || \ Sgl_mantissa(sgl_value)==0) #define Sgl_islessthan(sgl_op1,sgl_op2) \ (Sall(sgl_op1) < Sall(sgl_op2)) #define Sgl_isgreaterthan(sgl_op1,sgl_op2) \ (Sall(sgl_op1) > Sall(sgl_op2)) #define Sgl_isnotlessthan(sgl_op1,sgl_op2) \ (Sall(sgl_op1) >= Sall(sgl_op2)) #define Sgl_isequal(sgl_op1,sgl_op2) \ (Sall(sgl_op1) == Sall(sgl_op2)) #define Sgl_leftshiftby8(sgl_value) \ Sall(sgl_value) <<= 8 #define Sgl_leftshiftby4(sgl_value) \ Sall(sgl_value) <<= 4 #define Sgl_leftshiftby3(sgl_value) \ Sall(sgl_value) <<= 3 #define Sgl_leftshiftby2(sgl_value) \ Sall(sgl_value) <<= 2 #define Sgl_leftshiftby1(sgl_value) \ Sall(sgl_value) <<= 1 #define Sgl_rightshiftby1(sgl_value) \ Sall(sgl_value) >>= 1 #define Sgl_rightshiftby4(sgl_value) \ Sall(sgl_value) >>= 4 #define Sgl_rightshiftby8(sgl_value) \ Sall(sgl_value) >>= 8 #define Sgl_ismagnitudeless(signlessleft,signlessright) \ /* unsigned int signlessleft, signlessright; */ \ (signlessleft < signlessright) #define Sgl_copytoint_exponentmantissa(source,dest) \ dest = Sexponentmantissa(source) /* A quiet NaN has the high mantissa bit clear and at least on other (in this * case the adjacent bit) bit set. */ #define Sgl_set_quiet(sgl_value) Deposit_shigh2mantissa(sgl_value,1) #define Sgl_set_exponent(sgl_value,exp) Deposit_sexponent(sgl_value,exp) #define Sgl_set_mantissa(dest,value) Deposit_smantissa(dest,value) #define Sgl_set_exponentmantissa(dest,value) \ Deposit_sexponentmantissa(dest,value) /* An infinity is represented with the max exponent and a zero mantissa */ #define Sgl_setinfinity_exponent(sgl_value) \ Deposit_sexponent(sgl_value,SGL_INFINITY_EXPONENT) #define Sgl_setinfinity_exponentmantissa(sgl_value) \ Deposit_sexponentmantissa(sgl_value, \ (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH)))) #define Sgl_setinfinitypositive(sgl_value) \ Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) #define Sgl_setinfinitynegative(sgl_value) \ Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) \ | (1<<31) #define Sgl_setinfinity(sgl_value,sign) \ Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) | \ (sign << 31) #define Sgl_sethigh4bits(sgl_value, extsign) \ Deposit_shigh4(sgl_value,extsign) #define Sgl_set_sign(sgl_value,sign) Deposit_ssign(sgl_value,sign) #define Sgl_invert_sign(sgl_value) \ Deposit_ssign(sgl_value,~Ssign(sgl_value)) #define Sgl_setone_sign(sgl_value) Deposit_ssign(sgl_value,1) #define Sgl_setone_lowmantissa(sgl_value) Deposit_slow(sgl_value,1) #define Sgl_setzero_sign(sgl_value) Sall(sgl_value) &= 0x7fffffff #define Sgl_setzero_exponent(sgl_value) Sall(sgl_value) &= 0x807fffff #define Sgl_setzero_mantissa(sgl_value) Sall(sgl_value) &= 0xff800000 #define Sgl_setzero_exponentmantissa(sgl_value) Sall(sgl_value) &= 0x80000000 #define Sgl_setzero(sgl_value) Sall(sgl_value) = 0 #define Sgl_setnegativezero(sgl_value) Sall(sgl_value) = 1 << 31 /* Use following macro for both overflow & underflow conditions */ #define ovfl - #define unfl + #define Sgl_setwrapped_exponent(sgl_value,exponent,op) \ Deposit_sexponent(sgl_value,(exponent op SGL_WRAP)) #define Sgl_setlargestpositive(sgl_value) \ Sall(sgl_value) = ((FLT_MAX_EXP+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ | ((1<<(32-(1+SGL_EXP_LENGTH))) - 1) #define Sgl_setlargestnegative(sgl_value) \ Sall(sgl_value) = ((FLT_MAX_EXP+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ | ((1<<(32-(1+SGL_EXP_LENGTH))) - 1 ) | (1<<31) #define Sgl_setnegativeinfinity(sgl_value) \ Sall(sgl_value) = \ ((1<>= shift; \ } \ else { \ Extall(extent) = Sall(srcdst); \ Sall(srcdst) = 0; \ } #define Sgl_hiddenhigh3mantissa(sgl_value) Shiddenhigh3mantissa(sgl_value) #define Sgl_hidden(sgl_value) Shidden(sgl_value) #define Sgl_lowmantissa(sgl_value) Slow(sgl_value) /* The left argument is never smaller than the right argument */ #define Sgl_subtract(sgl_left,sgl_right,sgl_result) \ Sall(sgl_result) = Sall(sgl_left) - Sall(sgl_right) /* Subtract right augmented with extension from left augmented with zeros and * store into result and extension. */ #define Sgl_subtract_withextension(left,right,extent,result) \ /* sgl_floating_point left,right,result; extension extent */ \ Sgl_subtract(left,right,result); \ if((Extall(extent) = 0-Extall(extent))) \ Sall(result) = Sall(result)-1 #define Sgl_addition(sgl_left,sgl_right,sgl_result) \ Sall(sgl_result) = Sall(sgl_left) + Sall(sgl_right) #define Sgl_xortointp1(left,right,result) \ result = Sall(left) XOR Sall(right); #define Sgl_xorfromintp1(left,right,result) \ Sall(result) = left XOR Sall(right) /* Need to Initialize */ #define Sgl_makequietnan(dest) \ Sall(dest) = ((FLT_MAX_EXP+SGL_BIAS)+1)<< (32-(1+SGL_EXP_LENGTH)) \ | (1<<(32-(1+SGL_EXP_LENGTH+2))) #define Sgl_makesignalingnan(dest) \ Sall(dest) = ((FLT_MAX_EXP+SGL_BIAS)+1)<< (32-(1+SGL_EXP_LENGTH)) \ | (1<<(32-(1+SGL_EXP_LENGTH+1))) #define Sgl_normalize(sgl_opnd,exponent) \ while(Sgl_iszero_hiddenhigh7mantissa(sgl_opnd)) { \ Sgl_leftshiftby8(sgl_opnd); \ exponent -= 8; \ } \ if(Sgl_iszero_hiddenhigh3mantissa(sgl_opnd)) { \ Sgl_leftshiftby4(sgl_opnd); \ exponent -= 4; \ } \ while(Sgl_iszero_hidden(sgl_opnd)) { \ Sgl_leftshiftby1(sgl_opnd); \ exponent -= 1; \ } #define Sgl_setoverflow(sgl_opnd) \ /* set result to infinity or largest number */ \ switch (Rounding_mode()) { \ case ROUNDPLUS: \ if (Sgl_isone_sign(sgl_opnd)) { \ Sgl_setlargestnegative(sgl_opnd); \ } \ else { \ Sgl_setinfinitypositive(sgl_opnd); \ } \ break; \ case ROUNDMINUS: \ if (Sgl_iszero_sign(sgl_opnd)) { \ Sgl_setlargestpositive(sgl_opnd); \ } \ else { \ Sgl_setinfinitynegative(sgl_opnd); \ } \ break; \ case ROUNDNEAREST: \ Sgl_setinfinity_exponentmantissa(sgl_opnd); \ break; \ case ROUNDZERO: \ Sgl_setlargest_exponentmantissa(sgl_opnd); \ } #define Sgl_denormalize(opnd,exponent,guard,sticky,inexact) \ Sgl_clear_signexponent_set_hidden(opnd); \ if (exponent >= (1 - SGL_P)) { \ guard = (Sall(opnd) >> (-(exponent))) & 1; \ if (exponent < 0) sticky |= Sall(opnd) << (32+exponent); \ inexact = (guard) | (sticky); \ Sall(opnd) >>= (1-exponent); \ } \ else { \ guard = 0; \ sticky |= Sall(opnd); \ inexact = sticky; \ Sgl_setzero(opnd); \ } sgl_floating_point sgl_setoverflow(unsigned int); int sgl_fadd(sgl_floating_point *, sgl_floating_point *, sgl_floating_point *, unsigned int *); int sgl_fcmp(sgl_floating_point *, sgl_floating_point *, unsigned int, unsigned int *); int sgl_fdiv(sgl_floating_point *, sgl_floating_point *, sgl_floating_point *, unsigned int *); int sgl_fmpy(sgl_floating_point *, sgl_floating_point *, sgl_floating_point *, unsigned int *); int sgl_frem(sgl_floating_point *, sgl_floating_point *, sgl_floating_point *, unsigned int *); int sgl_fsqrt(sgl_floating_point *, sgl_floating_point *, unsigned int *); int sgl_fsub(sgl_floating_point *, sgl_floating_point *, sgl_floating_point *, unsigned int *); int sgl_frnd(sgl_floating_point *, sgl_floating_point *, unsigned int *);