Final Assembly Code For Fir Filter - Texas Instruments TMS320C6000 Programmer's Manual

Example 6–78. Final Assembly Code for FIR Filter
MV
|| ADD
|| MV
|| ADD
|| MVK
LDW
|| LDW
|| MVK
LDW
|| LDW
|| MVK
|| MVK
LDW
|| LDW
||[A1] SUB
|| MVK
|| MVK
|| ADD
LDW
|| LDW
||[!A1] SUB
[!A1] SUB
||[!A1] SUB
|| LDH
ADD
|| MVK
MPYLH
||[!A1] SUB
|| MPYHL
MPY
|| MPYLH
||[A2] SUB
|| ZERO
[!A2] SHR
|| MPY
|| MPYH
||[A2] ADD
|| LDW
|| LDW
|| ZERO
.L1X B4,A0
.D2 B4,4,B2
.L2X A4,B1
.D1 A4,4,A4
.S2 200,B0
.D1 *A4++[2],B9
.D2 *B1++[2],A10
.S1 4,A1
.D2 *B2++[2],B7
.D1 *A0++[2],A8
.S1 60,A3
.S2 60,B14
.D2 *B1++[2],A11
.D1 *A4++[2],B10
.L1 A1,1,A1
.S1 64,A5
.S2 64,B5
.L2X A6,2,B6
.D1 *A0++[2],A9
.D2 *B2++[2],B8
.S1 A4,A3,A4
.S2 B1,B14,B1
.S1 A0,A5,A0
.D2 *B1,A8
.S2X A10,0,B8
.S1 5,A2
.M2X A8,B8,B4
.S2 B2,B5,B2
.M1X A8,B9,A14
.M1 A8,A10,A7
.M2 B7,B9,B13
.S1 A2,1,A2
.L2 B11
.S2 B11,15,B11
.M2 B7,B9,B9
.M1 A8,A10,A10
.L2 B4,B11,B4
.D1 *A4++[2],B9
.D2 *B1++[2],A10
.L1 A10
Outer Loop Conditionally Executed With Inner Loop
; point to h[0] & h[1]
; point to h[2] & h[3]
; point to x[j] & x[j+1]
; point to x[j+2] & x[j+3]
; set lp ctr ((32/8)*(100/2))
; x[j+i+2] & x[j+i+3]
; x[j+i+0] & x[j+i+1]
; set pointer reset lp cntr
; h[i+2] & h[i+3]
; h[i+0] & h[i+1]
; used to reset x ptr (16*4–4)
; used to reset x ptr (16*4–4)
; x[j+i+4] & x[j+i+5]
; x[j+i+6] & x[j+i+7]
; dec pointer reset lp cntr
; used to reset h ptr (16*4)
; used to reset h ptr (16*4)
; point to y[j+1]
; h[i+4] & h[i+5]
; h[i+6] & h[i+7]
; reset x ptr
; reset x ptr
; reset h ptr
; x[j+i+8]
; move to other reg file
; set store lp cntr
; p10 = h[i+0]*x[j+i+1]
; reset h ptr
; p11 = h[i+1]*x[j+i+2]
; p00 = h[i+0]*x[j+i+0]
; p12 = h[i+2]*x[j+i+3]
; dec store lp cntr
; zero out initial accumulator
; (Bsum1 >> 15)
; p02 = h[i+2]*x[j+i+2]
; p01 = h[i+1]*x[j+i+1]
; sum1(p10) = p10 + sum1
;* x[j+i+2] & x[j+i+3]
;* x[j+i+0] & x[j+i+1]
; zero out initial accumulator
Optimizing Assembly Code via Linear Assembly 6-147