Motorola DSP96002 - Manual (Page 706)

MOTOROLA DSP96002 USER’S MANUAL B-187
jmp echeck
;
; MOTOROLA DSP96002 DPLIB - VERSION 1.0
;
; DP_CLR - Set the double precision number to zero.
;
; Entry point: dp_clr: c(r0) = 0
;
; 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
;
dp_clr clr d0.l ;get a 0
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_CMP - Compare the two double precision numbers.
;
; Entry point: dp_cmp: c(r0)-c(r1) (set condition codes)
;
; Inputs: r0 contains the lowest address of the 4-word internal
; extended precision number
;
; Outputs: none
;
; CCR CONDITION CODES:
;
; C - NOT AFFECTED.
; V - ALWAYS CLEARED
; Z - SET IF RESULT IS ZERO, CLEARED OTHERWISE.
; N - SET IF RESULT IS NEGATIVE, CLEARED OTHERWISE.
; I - NOT AFFECTED.
; LR - NOT AFFECTED.
; R - NOT AFFECTED.
; A - NOT AFFECTED.
;
; The following Jcc branch conditions can be used after
; calling dp_cmp. The other branch conditions should not
; be used.
;
; "cc" Mnemonic Condition
; EQ - equal Z = 1