參數(shù)資料
型號: AN2407
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Reed Solomon Encoder/Decoder on the StarCore SC140/SC1400 Cores, With Extended Examples
中文描述: 里德所羅門編碼器/的StarCore SC140/SC1400核心解碼器,以擴展實例
文件頁數(shù): 36/48頁
文件大?。?/td> 306K
代理商: AN2407
Reed Solomon Encoder/Decoder on the StarCore SC140/SC1400 Cores, With Extended Examples, Rev. 1
36
Freescale Semiconductor
References
push r6
push d6
push r7
push d7
adda #allocation,sp,r6
tfra r6,sp
move.l (sp-roots_off),r13
adda #-temp2_off,sp,r2
adda #-temp3_off,sp,r3
adda #-temp4_off,sp,r4
adda #-temp5_off,sp,r5
adda #-temp6_off,sp,r6
adda #-temp7_off,sp,r7
adda #-temp8_off,sp,r8
move.l (sp-err_locs_off),r14
START_CHIEN_SEARCH
doen2 #T+1
dosetup2 LOOP_ON_T
clr d15
move.l #_exp_2_bin_extended,d14
move.l #_exp_table_for_syndrome,r2
move.w #$1ff,d0
[ dosetup3 LOOP_ON_N
tfra r0,r8
move.w #$1ff,d1
move.w (r1)+,d11
; 1-st term of error_loc_poly
->
d11
]
aslw d11,d10
; For the software pipeline, d2,d3,d4 and d8 are prepared to 1-st iteration
; while d5,d6,d7,d13 are prepared to the 0-th iteration)
loopstart2
LOOP_ON_T
[ doen3 #N/4
in
tfr d1,d12
d10
tfra r8,r0
]
eor d11,d10
; 1-st term of error_loc_poly
; upper and lower portion of
move.2l (r2)+,d8:d9
[ add2 d10,d8
]
add2 d10,d9
[ zxt.w d8,d5
tfr d1,d7
]
zxt.w d9,d3
asrw d8,d4
[ min d1,d5
min d0,d4
]
min d3,d7
asrw d9,d8
[ add d14,d5,d2
add d14,d4,d4
]
add d14,d7,d3
min d8,d12
[ add d14,d12,d5
move.l d4,r3
]
move.l d3,r4
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