offset := add(v.ptr, st.offset, "precomputed value offset")
						intFromReg(regs, st.ireg, st.size, offset)
					case abiStepPointer:
						s := add(v.ptr, st.offset, "precomputed value offset")
						*((*unsafe.Pointer)(s)) = regs.Ptrs[st.ireg]
					case abiStepFloatReg:
						offset := add(v.ptr, st.offset, "precomputed value offset")
						floatFromReg(regs, st.freg, st.size, offset)
					case abiStepStack:

		{name: "PXOR", argLength: 2, reg: fp21, asm: "PXOR", commutative: true, resultInArg0: true}, // exclusive or, applied to X regs (for float negation).
		{name: "POR", argLength: 2, reg: fp21, asm: "POR", commutative: true, resultInArg0: true},   // inclusive or, applied to X regs (for float min/max).