Function asConstant

instructions.go:128–128

(r int)

func isConstant(x int) bool   { return 0 != x&bitRK }
func constantIndex(r int) int { return r & ^bitRK }
func asConstant(r int) int    { return r | bitRK }

// creates a mask with 'n' 1 bits at position 'p'
func mask1(n, p uint) instruction { return ^(^instruction(0) << n) << p }