| /* |
| * Linux/PA-RISC Project (http://www.parisc-linux.org/) |
| * |
| * Floating-point emulation code |
| * Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org> |
| * |
| * 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 |
| */ |
| |
| #ifdef __NO_PA_HDRS |
| PA header file -- do not include this header file for non-PA builds. |
| #endif |
| |
| /* 32-bit word grabbing 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)|~((unsigned int)1<<31)) & Sall(src1dst) |
| #define Sgl_or_signs( src1dst, src2) \ |
| Sall(src1dst) = (Sall(src2)&((unsigned int)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) &= ~((unsigned int)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) & ((unsigned int)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))) \ |
| | ((unsigned int)1<<31) |
| #define Sgl_setinfinity(sgl_value,sign) \ |
| Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) | \ |
| ((unsigned int)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) = (unsigned int)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) = ((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ |
| | ((1<<(32-(1+SGL_EXP_LENGTH))) - 1 ) |
| #define Sgl_setlargestnegative(sgl_value) \ |
| Sall(sgl_value) = ((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ |
| | ((1<<(32-(1+SGL_EXP_LENGTH))) - 1 ) \ |
| | ((unsigned int)1<<31) |
| |
| #define Sgl_setnegativeinfinity(sgl_value) \ |
| Sall(sgl_value) = \ |
| ((1<<SGL_EXP_LENGTH) | SGL_INFINITY_EXPONENT) << (32-(1+SGL_EXP_LENGTH)) |
| #define Sgl_setlargest(sgl_value,sign) \ |
| Sall(sgl_value) = (unsigned int)sign << 31 | \ |
| (((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ |
| | ((1 << (32-(1+SGL_EXP_LENGTH))) - 1 )) |
| #define Sgl_setlargest_exponentmantissa(sgl_value) \ |
| Sall(sgl_value) = Sall(sgl_value) & ((unsigned int)1<<31) | \ |
| (((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ |
| | ((1 << (32-(1+SGL_EXP_LENGTH))) - 1 )) |
| |
| /* The high bit is always zero so arithmetic or logical shifts will work. */ |
| #define Sgl_right_align(srcdst,shift,extent) \ |
| /* sgl_floating_point srcdst; int shift; extension extent */ \ |
| if (shift < 32) { \ |
| Extall(extent) = Sall(srcdst) << (32-(shift)); \ |
| Sall(srcdst) >>= 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) = ((SGL_EMAX+SGL_BIAS)+1)<< (32-(1+SGL_EXP_LENGTH)) \ |
| | (1<<(32-(1+SGL_EXP_LENGTH+2))) |
| #define Sgl_makesignalingnan(dest) \ |
| Sall(dest) = ((SGL_EMAX+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); \ |
| } |
| |
| /* |
| * The fused multiply add instructions requires a single extended format, |
| * with 48 bits of mantissa. |
| */ |
| #define SGLEXT_THRESHOLD 48 |
| |
| #define Sglext_setzero(valA,valB) \ |
| Sextallp1(valA) = 0; Sextallp2(valB) = 0 |
| |
| #define Sglext_isnotzero_mantissap2(valB) (Sextallp2(valB)!=0) |
| #define Sglext_isone_lowp1(val) (Sextlowp1(val)!=0) |
| #define Sglext_isone_highp2(val) (Sexthighp2(val)!=0) |
| #define Sglext_isnotzero_low31p2(val) (Sextlow31p2(val)!=0) |
| #define Sglext_iszero(valA,valB) (Sextallp1(valA)==0 && Sextallp2(valB)==0) |
| |
| #define Sgl_copytoptr(src,destptr) *destptr = src |
| #define Sgl_copyfromptr(srcptr,dest) dest = *srcptr |
| #define Sglext_copy(srca,srcb,desta,destb) \ |
| Sextallp1(desta) = Sextallp1(srca); \ |
| Sextallp2(destb) = Sextallp2(srcb) |
| #define Sgl_copyto_sglext(src1,dest1,dest2) \ |
| Sextallp1(dest1) = Sall(src1); Sextallp2(dest2) = 0 |
| |
| #define Sglext_swap_lower(leftp2,rightp2) \ |
| Sextallp2(leftp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2); \ |
| Sextallp2(rightp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2); \ |
| Sextallp2(leftp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2) |
| |
| #define Sglext_setone_lowmantissap2(value) Deposit_dlowp2(value,1) |
| |
| /* The high bit is always zero so arithmetic or logical shifts will work. */ |
| #define Sglext_right_align(srcdstA,srcdstB,shift) \ |
| {int shiftamt, sticky; \ |
| shiftamt = shift % 32; \ |
| sticky = 0; \ |
| switch (shift/32) { \ |
| case 0: if (shiftamt > 0) { \ |
| sticky = Sextallp2(srcdstB) << 32 - (shiftamt); \ |
| Variable_shift_double(Sextallp1(srcdstA), \ |
| Sextallp2(srcdstB),shiftamt,Sextallp2(srcdstB)); \ |
| Sextallp1(srcdstA) >>= shiftamt; \ |
| } \ |
| break; \ |
| case 1: if (shiftamt > 0) { \ |
| sticky = (Sextallp1(srcdstA) << 32 - (shiftamt)) | \ |
| Sextallp2(srcdstB); \ |
| } \ |
| else { \ |
| sticky = Sextallp2(srcdstB); \ |
| } \ |
| Sextallp2(srcdstB) = Sextallp1(srcdstA) >> shiftamt; \ |
| Sextallp1(srcdstA) = 0; \ |
| break; \ |
| } \ |
| if (sticky) Sglext_setone_lowmantissap2(srcdstB); \ |
| } |
| |
| /* The left argument is never smaller than the right argument */ |
| #define Sglext_subtract(lefta,leftb,righta,rightb,resulta,resultb) \ |
| if( Sextallp2(rightb) > Sextallp2(leftb) ) Sextallp1(lefta)--; \ |
| Sextallp2(resultb) = Sextallp2(leftb) - Sextallp2(rightb); \ |
| Sextallp1(resulta) = Sextallp1(lefta) - Sextallp1(righta) |
| |
| #define Sglext_addition(lefta,leftb,righta,rightb,resulta,resultb) \ |
| /* If the sum of the low words is less than either source, then \ |
| * an overflow into the next word occurred. */ \ |
| if ((Sextallp2(resultb) = Sextallp2(leftb)+Sextallp2(rightb)) < \ |
| Sextallp2(rightb)) \ |
| Sextallp1(resulta) = Sextallp1(lefta)+Sextallp1(righta)+1; \ |
| else Sextallp1(resulta) = Sextallp1(lefta)+Sextallp1(righta) |
| |
| |
| #define Sglext_arithrightshiftby1(srcdstA,srcdstB) \ |
| Shiftdouble(Sextallp1(srcdstA),Sextallp2(srcdstB),1,Sextallp2(srcdstB)); \ |
| Sextallp1(srcdstA) = (int)Sextallp1(srcdstA) >> 1 |
| |
| #define Sglext_leftshiftby8(valA,valB) \ |
| Shiftdouble(Sextallp1(valA),Sextallp2(valB),24,Sextallp1(valA)); \ |
| Sextallp2(valB) <<= 8 |
| #define Sglext_leftshiftby4(valA,valB) \ |
| Shiftdouble(Sextallp1(valA),Sextallp2(valB),28,Sextallp1(valA)); \ |
| Sextallp2(valB) <<= 4 |
| #define Sglext_leftshiftby3(valA,valB) \ |
| Shiftdouble(Sextallp1(valA),Sextallp2(valB),29,Sextallp1(valA)); \ |
| Sextallp2(valB) <<= 3 |
| #define Sglext_leftshiftby2(valA,valB) \ |
| Shiftdouble(Sextallp1(valA),Sextallp2(valB),30,Sextallp1(valA)); \ |
| Sextallp2(valB) <<= 2 |
| #define Sglext_leftshiftby1(valA,valB) \ |
| Shiftdouble(Sextallp1(valA),Sextallp2(valB),31,Sextallp1(valA)); \ |
| Sextallp2(valB) <<= 1 |
| |
| #define Sglext_rightshiftby4(valueA,valueB) \ |
| Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),4,Sextallp2(valueB)); \ |
| Sextallp1(valueA) >>= 4 |
| #define Sglext_rightshiftby3(valueA,valueB) \ |
| Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),3,Sextallp2(valueB)); \ |
| Sextallp1(valueA) >>= 3 |
| #define Sglext_rightshiftby1(valueA,valueB) \ |
| Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),1,Sextallp2(valueB)); \ |
| Sextallp1(valueA) >>= 1 |
| |
| #define Sglext_xortointp1(left,right,result) Sgl_xortointp1(left,right,result) |
| #define Sglext_xorfromintp1(left,right,result) \ |
| Sgl_xorfromintp1(left,right,result) |
| #define Sglext_copytoint_exponentmantissa(src,dest) \ |
| Sgl_copytoint_exponentmantissa(src,dest) |
| #define Sglext_ismagnitudeless(signlessleft,signlessright) \ |
| Sgl_ismagnitudeless(signlessleft,signlessright) |
| |
| #define Sglext_set_sign(dbl_value,sign) Sgl_set_sign(dbl_value,sign) |
| #define Sglext_clear_signexponent_set_hidden(srcdst) \ |
| Sgl_clear_signexponent_set_hidden(srcdst) |
| #define Sglext_clear_signexponent(srcdst) Sgl_clear_signexponent(srcdst) |
| #define Sglext_clear_sign(srcdst) Sgl_clear_sign(srcdst) |
| #define Sglext_isone_hidden(dbl_value) Sgl_isone_hidden(dbl_value) |
| |
| #define Sglext_denormalize(opndp1,opndp2,exponent,is_tiny) \ |
| {int sticky; \ |
| is_tiny = TRUE; \ |
| if (exponent == 0 && Sextallp2(opndp2)) { \ |
| switch (Rounding_mode()) { \ |
| case ROUNDPLUS: \ |
| if (Sgl_iszero_sign(opndp1)) \ |
| if (Sgl_isone_hiddenoverflow(opndp1 + 1)) \ |
| is_tiny = FALSE; \ |
| break; \ |
| case ROUNDMINUS: \ |
| if (Sgl_isone_sign(opndp1)) { \ |
| if (Sgl_isone_hiddenoverflow(opndp1 + 1)) \ |
| is_tiny = FALSE; \ |
| } \ |
| break; \ |
| case ROUNDNEAREST: \ |
| if (Sglext_isone_highp2(opndp2) && \ |
| (Sglext_isone_lowp1(opndp1) || \ |
| Sglext_isnotzero_low31p2(opndp2))) \ |
| if (Sgl_isone_hiddenoverflow(opndp1 + 1)) \ |
| is_tiny = FALSE; \ |
| break; \ |
| } \ |
| } \ |
| Sglext_clear_signexponent_set_hidden(opndp1); \ |
| if (exponent >= (1-DBL_P)) { \ |
| if (exponent >= -31) { \ |
| if (exponent > -31) { \ |
| sticky = Sextallp2(opndp2) << 31+exponent; \ |
| Variable_shift_double(opndp1,opndp2,1-exponent,opndp2); \ |
| Sextallp1(opndp1) >>= 1-exponent; \ |
| } \ |
| else { \ |
| sticky = Sextallp2(opndp2); \ |
| Sextallp2(opndp2) = Sextallp1(opndp1); \ |
| Sextallp1(opndp1) = 0; \ |
| } \ |
| } \ |
| else { \ |
| sticky = (Sextallp1(opndp1) << 31+exponent) | \ |
| Sextallp2(opndp2); \ |
| Sextallp2(opndp2) = Sextallp1(opndp1) >> -31-exponent; \ |
| Sextallp1(opndp1) = 0; \ |
| } \ |
| } \ |
| else { \ |
| sticky = Sextallp1(opndp1) | Sextallp2(opndp2); \ |
| Sglext_setzero(opndp1,opndp2); \ |
| } \ |
| if (sticky) Sglext_setone_lowmantissap2(opndp2); \ |
| exponent = 0; \ |
| } |
