korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-17 01:04:19 +08:00
Code Issues Packages Projects Releases Wiki Activity
55a03ac837
linux/arch/parisc/math-emu/sgl_float.h

474 lines
18 KiB
C
Raw Normal View History

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 150 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>
2019-05-24 18:04:10 +08:00
/* SPDX-License-Identifier: GPL-2.0-or-later */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* Linux/PA-RISC Project (http://www.parisc-linux.org/)
*
* Floating-point emulation code
* Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
*/
#ifdef __NO_PA_HDRS
PA header file -- do not include this header file for non-PA builds.
#endif
[PARISC] spelling fixes: arch/parisc/ Spelling fixes in arch/parisc/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Acked-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
2007-05-12 03:42:34 +08:00
/* 32-bit word grabbing functions */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#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)
[PARISC] spelling fixes: arch/parisc/ Spelling fixes in arch/parisc/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Acked-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
2007-05-12 03:42:34 +08:00
/* sgl_and_signs ANDs the sign bits of each argument and puts the result
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* 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; \
}
Reference in New Issue Copy Permalink