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* @(#)Kdivd.s 7.1 (Berkeley) 12/6/90
#include "../tahoe/SYS.h"
#define HIDDEN 23 # here we count from 0 not from 1 as in fp.h
ENTRY(Kdivd, R9|R8|R7|R6|R5|R4|R3|R2)
clrl r3 # r3 - sign: 0 for positive,1 for negative.
bbc $0,r3,1f # seconed operand is negative.
clrl r3 # if first was negative, make result positive.
1: movl $1,r3 # if first was positive, make result negative.
2: andl2 $EXPMASK,r0 # compute first 'pure'exponent.
andl2 $EXPMASK,r2 # compute seconed 'pure'exponent.
subl3 r2,r0,r2 # subtruct the exponents.
# normalization can make the exp. smaller.
# We have the sign in r3,the exponent in r2,now is the time to
# perform the division...
# fetch dividend. (r4,r5)
andl3 $(0!(EXPMASK | SIGNBIT)),4(fp),r4
# fetch divisor : (r6,r7)
andl3 $(0!(EXPMASK | SIGNBIT)),12(fp),r6
movl $0,r0 # init r0,r1 to be zeros
movl $(0!CLEARHID),r8# r8 first bit to set (if).
shll $1,r8,r8 # to have one more bit,because we might
# have to shift left to normelize.
retz2: bbc $31,12(fp),z_div