In this particular instance, 64-bit ARM (A64) has a conditional-set instruction, so "int cmp(int x) { return x < 32; }" compiles straightforwardly to "cmp w0, #

In this particular instance, 64-bit ARM (A64) has a conditional-set instruction, so "int cmp(int x) { return x < 32; }" compiles straightforwardly to "cmp w0, #0x1f; cset w0, le; ret". For 32-bit ARM you can use the conditional-execution you get on almost all instructions, so gcc emits "cmp r0, #31; movgt r0, #0; movle r0, #1; bx lr".