ref: a57a6e511f15c02b4fd2690197b6f1333b171193
dir: /sys/src/libmp/arm/mpvecdigmulsub.s/
TEXT mpvecdigmulsub(SB),$0 MOVW n+4(FP),R4 MOVW m+8(FP),R5 MOVW p+12(FP),R6 MOVW $0, R2 _mulsubloop: MOVW $0, R1 MOVW.P 4(R0), R3 MULALU R3, R5, (R1, R2) MOVW (R6), R7 SUB.S R2, R7 ADD.CC $1, R1 MOVW R1, R2 MOVW.P R7, 4(R6) SUB.S $1, R4 B.NE _mulsubloop MOVW (R6), R7 SUB.S R2, R7 MOVW.CS $1, R0 MOVW.CC $-1, R0 MOVW R7, (R6) RET