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millfork/include/zp_reg.mfk

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inline asm byte __mul_u8u8u8() {
? LDA #0
? JMP __mul_u8u8u8_start
__mul_u8u8u8_add:
? CLC
? ADC __reg.lo
__mul_u8u8u8_loop:
? ASL __reg.lo
__mul_u8u8u8_start:
? LSR __reg.hi
? BCS __mul_u8u8u8_add
? BNE __mul_u8u8u8_loop
? RTS
}