Algorithm 2 LUT-based modular reduction in source code (mod 7681)
Input: operands R22, R23, R24, R25		17: LDI R31, hi8(LUT1_H)
		18: LPM R23, Z
Output: results {R24, R25}
		19: ADD R18, R22
1: CLR R26	{MOV-and-ADD}	20: ADC R19, R23
2: MUL R24, R22		21: ADC R20, R20	{Register re-use}
3: MOVW R18, R0
4: MUL R25, R23		22: MOV R30, R19
5: MOVW R20, R0		23: ANDI R19, 0X1F
		24: LSR R20
6: MOVW R18, R0		25: ROR R30
7: ADD R19, R0
8: MOVW R18, R0		26: ANDI R30, 0XF0
9: MOVW R18, R0		27: ADD R30, R21
		28: LDI R31, hi8(LUT2_L)	{LUT access}
10: MOVW R18, R0		29: LPM R24, Z
11: MOVW R18, R0
12: ADC R20, R1		30: LDI R31, hi8(LUT2_H)
13: ADC R21, R26		31: LPM R25, Z
14: MOV R30, R20		32: ADD R24, R18
15: LDI R31, hi8(LUT1_L)	{LUT access}	33: ADC R25, R19
16: LPM R22, Z		34: CLR R1