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Message: [QUOTE="Edward A. Falk, post: 4215975"] See my previous post. OP is working with a cpu that doesn't have multiple threads of execution, per se, but does have parallel threads of computation. Imagine: a = x1 * x2 + x3; b = y1 * y2 + y3; c = z1 * z2 + z3; I've worked on a CPU that could compute those three expressions in perfect parallel. We made sure our compiler recognized cases like this and optimized accordingly. I think OP's problem is that the (a && b && c) short-circuiting is preventing the compiler from computing those values in parallel. That's really a failure on the compiler's part, but OP is hoping there's a way to hint to the compiler that short-circuiting is not necessary. And yes, without extending the language, there's no way to *force* the compiler to compute that stuff in parallel. [/QUOTE]