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; X86ISA Library
; Note: The license below is based on the template at:
; http://opensource.org/licenses/BSD-3-Clause
; Copyright (C) 2015, Regents of the University of Texas
; All rights reserved.
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions are
; met:
; o Redistributions of source code must retain the above copyright
; notice, this list of conditions and the following disclaimer.
; o Redistributions in binary form must reproduce the above copyright
; notice, this list of conditions and the following disclaimer in the
; documentation and/or other materials provided with the distribution.
; o Neither the name of the copyright holders nor the names of its
; contributors may be used to endorse or promote products derived
; from this software without specific prior written permission.
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
; HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
; Original Author(s):
; Shilpi Goel <shigoel@cs.utexas.edu>
(in-package "X86ISA")
;; This book contains the specification of the following instructions:
;; and
(include-book "structures" :dir :utils)
(include-book "../rflags-spec"
:ttags (:undef-flg))
(local (include-book "centaur/bitops/ihs-extensions" :dir :system))
;; ======================================================================
;; SPECIFICATION: AND
;; ======================================================================
(define gpr-and-spec-gen-fn ((operand-size :type (member 1 2 4 8)))
:verify-guards nil
(b* ((fn-name (mk-name "GPR-AND-SPEC-" operand-size))
(result-nbits (ash operand-size 3))
(str-nbits (if (eql result-nbits 8) "08" result-nbits))
(?cf-spec-fn (mk-name "CF-SPEC" result-nbits))
(pf-spec-fn (mk-name "PF-SPEC" result-nbits))
(sf-spec-fn (mk-name "SF-SPEC" result-nbits)))
`(define ,fn-name
((dst :type (unsigned-byte ,result-nbits))
(src :type (unsigned-byte ,result-nbits))
(input-rflags :type (unsigned-byte 32)))
:parents (,(mk-name "GPR-ARITH/LOGIC-SPEC-" operand-size))
:guard-hints (("Goal" :in-theory (e/d* (rflag-RoWs-enables)
((tau-system)))))
:inline t
:no-function t
(b* ((dst (mbe :logic (n-size ,result-nbits dst)
:exec dst))
(src (mbe :logic (n-size ,result-nbits src)
:exec src))
(input-rflags (mbe :logic (n32 input-rflags)
:exec input-rflags))
((the (unsigned-byte ,result-nbits) result)
(mbe :logic (part-select (logand dst src)
:low 0 :width ,result-nbits)
:exec (logand dst src)))
(cf 0)
(pf (the (unsigned-byte 1) (,pf-spec-fn result)))
;; AF is undefined
(zf (the (unsigned-byte 1) (zf-spec result)))
(sf (the (unsigned-byte 1) (,sf-spec-fn result)))
(of 0)
(output-rflags (mbe :logic
(change-rflagsBits
input-rflags
:cf cf
:pf pf
:zf zf
:sf sf
:of of)
:exec
(the (unsigned-byte 32)
(!rflagsBits->cf
cf
(!rflagsBits->pf
pf
(!rflagsBits->zf
zf
(!rflagsBits->sf
sf
(!rflagsBits->of
of
input-rflags))))))))
(output-rflags (mbe :logic (n32 output-rflags)
:exec output-rflags))
;; AF is undefined.
(undefined-flags (!rflagsBits->af 1 0)))
(mv result output-rflags undefined-flags))
///
(defthm-unsigned-byte-p ,(mk-name "N" str-nbits "-MV-NTH-0-" fn-name)
:bound ,result-nbits
:concl (mv-nth 0 (,fn-name dst src input-rflags))
:gen-type t
:gen-linear t)
(defthm-unsigned-byte-p ,(mk-name "MV-NTH-1-" fn-name)
:bound 32
:concl (mv-nth 1 (,fn-name dst src input-rflags))
:gen-type t
:gen-linear t)
(defthm-unsigned-byte-p ,(mk-name "MV-NTH-2-" fn-name)
:bound 32
:concl (mv-nth 2 (,fn-name dst src input-rflags))
:gen-type t
:gen-linear t))
))
(make-event (gpr-and-spec-gen-fn 1))
(make-event (gpr-and-spec-gen-fn 2))
(make-event (gpr-and-spec-gen-fn 4))
(make-event (gpr-and-spec-gen-fn 8))
;; ======================================================================
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