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): 28/48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
28
Freescale Semiconductor
References
; Sum up the last results to accumulator and write the result into AGU register
r1.
END_LOOP_ON_BLOCK_POLY
eor d7,d15
eor d5,d15
eor d13,d15
eor d6,d15
move.b d15,(r1)+
suba #8,r2
loopend2
adda #-allocation,sp,r6
tfra r6,sp
pop r6
pop d6
pop r7
pop d7
END_SYNDROME
rts
global Fcalculate_syndrome_end
Fcalculate_syndrome_end
TextEnd_calculate_syndrome
endsec
Example 7.
Assembly Code for Berlekamp-Massey Algorithm
;*******************************************************************************
;* *
;* *
;* Reed-Solomon error correction algorithm *
;* *
;* SC140 ASSEMBLY
;* *
;*******************************************************************************
;* *
;* Module Name: berlekamp.asm *
;* *
;*******************************************************************************
;* *
;* Calling convention from C: *
;* berlekamp(syndromes, error_loc_poly, error_loc_poly_bin) *
;* *
;*******************************************************************************
;* *
;* INPUT: r0 : BYTE syndromes[2*T] *
;* 2T syndromes *
;* *
;* OUTPUT: r1 : WORD error_loc_poly[2*T] *
;* Error location polynomial in exponential form *
;* (sp-588) : BYTE error_loc_poly_bin[2*T] *
;* Error location polynomial in binary form *
;* *
;*******************************************************************************
;* *
;* FUNCTION : Deriving the error location polynomial by Berlekamp’s iterative *
;* algorithm. This is a compiled code which has been slightly *
;* modified by applying software pipelining applied and efficient *
;* register allocation. *
;* *
;* PERFORMANCE: Cycle count: *
*
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