xchg.py revision 7087:fb8d5786ff30
1# Copyright (c) 2007 The Hewlett-Packard Development Company 2# All rights reserved. 3# 4# The license below extends only to copyright in the software and shall 5# not be construed as granting a license to any other intellectual 6# property including but not limited to intellectual property relating 7# to a hardware implementation of the functionality of the software 8# licensed hereunder. You may use the software subject to the license 9# terms below provided that you ensure that this notice is replicated 10# unmodified and in its entirety in all distributions of the software, 11# modified or unmodified, in source code or in binary form. 12# 13# Redistribution and use in source and binary forms, with or without 14# modification, are permitted provided that the following conditions are 15# met: redistributions of source code must retain the above copyright 16# notice, this list of conditions and the following disclaimer; 17# redistributions in binary form must reproduce the above copyright 18# notice, this list of conditions and the following disclaimer in the 19# documentation and/or other materials provided with the distribution; 20# neither the name of the copyright holders nor the names of its 21# contributors may be used to endorse or promote products derived from 22# this software without specific prior written permission. 23# 24# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 27# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 28# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 30# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 34# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35# 36# Authors: Gabe Black 37 38microcode = ''' 39 40# All the memory versions need to use LOCK, regardless of if it was set 41 42def macroop XCHG_R_R 43{ 44 # Use the xor trick instead of moves to reduce register pressure. 45 # This probably doesn't make much of a difference, but it's easy. 46 xor reg, reg, regm 47 xor regm, regm, reg 48 xor reg, reg, regm 49}; 50 51def macroop XCHG_R_M 52{ 53 ldst t1, seg, sib, disp 54 st reg, seg, sib, disp 55 mov reg, reg, t1 56}; 57 58def macroop XCHG_R_P 59{ 60 rdip t7 61 ldst t1, seg, riprel, disp 62 st reg, seg, riprel, disp 63 mov reg, reg, t1 64}; 65 66def macroop XCHG_M_R 67{ 68 ldst t1, seg, sib, disp 69 st reg, seg, sib, disp 70 mov reg, reg, t1 71}; 72 73def macroop XCHG_P_R 74{ 75 rdip t7 76 ldst t1, seg, riprel, disp 77 st reg, seg, riprel, disp 78 mov reg, reg, t1 79}; 80 81def macroop XCHG_LOCKED_M_R 82{ 83 ldstl t1, seg, sib, disp 84 stul reg, seg, sib, disp 85 mov reg, reg, t1 86}; 87 88def macroop XCHG_LOCKED_P_R 89{ 90 rdip t7 91 ldstl t1, seg, riprel, disp 92 stul reg, seg, riprel, disp 93 mov reg, reg, t1 94}; 95''' 96