a

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+// virtual enhancements: custom opcodes wired into the cpu while compiling.
+// the recipes run through the core's optimizer; the jit inlines the result.
+enhance popcount(x) micro
+	"r1 = shr x 1; r1 = and r1 0x5555555555555555; x = sub x r1"
+	"; r1 = shr x 2; r1 = and r1 0x3333333333333333; x = and x 0x3333333333333333; x = add x r1"
+	"; r1 = shr x 4; x = add x r1; x = and x 0x0f0f0f0f0f0f0f0f; x = mul x 0x0101010101010101; x = shr x 56";
+enhance div10(x) micro "x = udiv x 10";		// becomes a multiply-high, no divide
+enhance hypot2(a, b) vm { 0 $ * ~ 0 $ * + };	// lifted from vm code
+enhance 2 minmax(a, b) micro "r2 = min a b; r1 = max a b; r0 = r2";
+let lo, hi;
+fn main() {
+	put_n(popcount(0xff00ff)); put_c(' ');
+	put_n(div10(12345)); put_c(' ');
+	put_n(hypot2(3, 4)); put_c(' ');
+	asm { 9 4 minmax hi ! lo ! }
+	put_n(lo); put_c('/'); put_n(hi); put_c(10);
+	return 0;
+}
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