switch st.kind {
				case abiStepIntReg:
					offset := add(s, st.offset, "precomputed value offset")
					intFromReg(&regArgs, st.ireg, st.size, offset)
				case abiStepPointer:
					s := add(s, st.offset, "precomputed value offset")
					*((*unsafe.Pointer)(s)) = regArgs.Ptrs[st.ireg]
				case abiStepFloatReg:
					offset := add(s, st.offset, "precomputed value offset")
					floatFromReg(&regArgs, st.freg, st.size, offset)

		return false
	}
	// If p is a multi-instruction sequence with uses REGTMP inserted by
	// the assembler in order to materialize a large constant/offset, we
	// can restart p (at the start of the instruction sequence), recompute
	// the content of REGTMP, upon async preemption. Currently, all cases
	// of assembler-inserted REGTMP fall into this category.
	// If p doesn't use REGTMP, it can be simply preempted, so we don't
	// mark it.