ARM VFP是使用名为HOL4 (Higher Order Logic) 的定理证明器进行形式验证的。以下是一个简单的HOL4示例：

val VFP_spec =
    let
        (* Specification of the VFP add instruction *)
        val add_spec =
            let
                val rd = mk_reg "rd" (mk_type "word32")
                val rn = mk_reg "rn" (mk_type "word32")
                val rm = mk_reg "rm" (mk_type "word32")
                val cpsr = mk_reg "cpsr" (mk_type "arm_pstate")
                val carry = mk_reg "carry" (mk_type "bool")
                val overflow = mk_reg "overflow" (mk_type "bool")

                val instr = mk_vfp_instr ADD rd rn rm cpsr carry overflow
                val semantics = mk_vfp_add_semantics rd rn rm cpsr carry overflow

                val precond = mk_true
                val postcond = mk_eq (reg_state rd) semantics

                val spec =
                    mk_specification
                        (mk_eq (instr_state instr) precond)
                        (mk_eq (instr_state (mk_nop_instr)) postcond)

            in
                spec
            end
    in
        [add_spec]
    end

这个示例定义了一个VFP add 指令的规范。它创建了一个HOL4规范对象，其中包含指令的前置条件、后置条件和语义表示。该规范可以被传递给HOL4的验证器以进行形式验证。