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TMS320F28069: how to speed up the division calculation of 2 unsigned integer?

Howard Zou
Genius 12365 points
Part Number: TMS320F28069


Hi,

my customer test the division speed of 2 unsigned integer,

Uint32 a, Uint 32 b. c=a/b.

The "/" takes around 40 cycles, and they think it's too long.

Are there any way other than "/" to do the division which is faster?

  • 0
    TI__Mastermind 26875 points

    Can you check what the disassembly looks like? Is it something like this?

    MOVB ACC,#0 ; Zero ACC
    MOVL P,@Num32 ; Load P register with Num32
    RPT #31 ; Repeat operation 32 times
    ||SUBCUL ACC,@Den32 ; Conditional subtract with Den32
    MOVL @Rem32,ACC ; Store remainder in Rem32
    MOVL @Quot32,P ; Store quotient in Quot32

    Thanks,

    Sira