MOTOROLA
DSP96002 USER’S MANUAL
B-193
eor d7,d1 d6.l,x:(r0) ;new sign, save exp
move d1.l,x:(r0+sign) ;save sign
jmp echeck ;go check for errors
page
;
; Check for overflow and underflow and saturate or flush to zero
;
echeck move x:(r0),d0.l ;get exponent
jset #31,d0.l,uflow ;bit 31 indicates underflow
jset #30,d0.l,oflow ;bit 30 indicates overflow
rts ;no errors
oflow move #$3fffffff,d0.l ;max exponent
move d0.l,x:(r0)
move #$ffffffff,d0.l ;max significand
move d0.l,x:(r0+ms)
move d0.l,x:(r0+ls)
rts
uflow clr d0 ;min exponent and significand
move d0.l,x:(r0)
move d0.l,x:(r0+sign)
move d0.l,x:(r0+ms)
move d0.l,x:(r0+ls)
rts
page
;
; MOTOROLA DSP96002 DPLIB - VERSION 1.0
;
; DP_NEG - Negate the double precision number pointed to by r0.
;
; Entry point: dp_neg: c(r0) = -c(r0)
;
; Inputs: r0 contains the lowest address of a 4-word internal
; extended precision number
;
; Outputs: r0 contains the lowest address of a 4-word internal
; extended precision number
;
; Alters: D0.L,D1.L
;
dp_neg move x:(r0+ms),d0.l ;get mantissa ms
move x:(r0+ls),d1.l ;get mantissa ls
or d1,d0 ;check to see if zero
jeq negzero ;can’t have negative zero
move x:(r0+sign),d0.l ;get sign
neg d0 ;negate
inc d0 ;correct
move d0.l,x:(r0+sign) ;save sign
negzero rts ;and return
;
; MOTOROLA DSP96002 DPLIB - VERSION 1.0
;
; DP_SCALE: scale the double precision number
;
Summary of Contents for DSP96002
Page 3: ...1 2 DSP96002 USER S MANUAL MOTOROLA ...
Page 38: ...MOTOROLA DSP96002 USER S MANUAL 3 15 Figure 3 4 Modulo Arithmetic Unit Block Diagram ...
Page 39: ...3 16 DSP96002 USER S MANUAL MOTOROLA ...
Page 53: ...4 14 DSP96002 USER S MANUAL MOTOROLA ...
Page 76: ...MOTOROLA DSP96002 USER S MANUAL 5 23 Figure 5 8 Address Modifier Summary ...
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Page 101: ...MOTOROLA DSP96002 USER S MANUAL 7 15 Figure 7 9 HI Block Diagram One Port ...
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Page 181: ...MOTOROLA DSP96002 USER S MANUAL 10 15 Figure 10 8 Program Address Bus FIFO ...
Page 337: ...MOTOROLA DSP96002 USER S MANUAL A 149 ...
Page 404: ...A 216 DSP96002 USER S MANUAL MOTOROLA PC xxxx D ...
Page 460: ...A 272 DSP96002 USER S MANUAL MOTOROLA SIOP Not affected ...
Page 484: ...A 296 DSP96002 USER S MANUAL MOTOROLA SSH PC SSL SR SP 1 SP ...
Page 519: ...MOTOROLA DSP96002 USER S MANUAL A 331 ...
Page 718: ...MOTOROLA DSP96002 USER S MANUAL B 199 ...
Page 871: ... MOTOROLA INC 1994 MOTOROLA TECHNICAL DATA SEMICONDUCTOR M Addendum ...
Page 888: ...MOTOROLA INDEX 1 INDEX ...
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