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

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121def macroop XADD_R_R {
122 add t2, regm, reg, flags=(OF,SF,ZF,AF,PF,CF)
123 mov regm, regm, reg
124 mov reg, reg, t2
125};
126
127'''
128
129cmpxchg8bCode = '''
130def macroop CMPXCHG8B_%(suffix)s {
131 %(rdip)s
132 lea t1, seg, %(sib)s, disp, dataSize=asz
133 ldst%(l)s t2, seg, [1, t0, t1], 0
134 ldst%(l)s t3, seg, [1, t0, t1], dsz
135
136 sub t0, rax, t2, flags=(ZF,)
137 br label("doneComparing"), flags=(nCZF,)
138 sub t0, rdx, t3, flags=(ZF,)
139doneComparing:
140
141 # If they're equal, set t3:t2 to rbx:rcx to write to memory
142 mov t2, t2, rbx, flags=(CZF,)
143 mov t3, t3, rcx, flags=(CZF,)
144
145 # If they're not equal, set rdx:rax to the value from memory.
146 mov rax, rax, t2, flags=(nCZF,)
147 mov rdx, rdx, t3, flags=(nCZF,)
148
149 # Write to memory
150 st%(ul)s t3, seg, [1, t0, t1], dsz
151 st%(ul)s t2, seg, [1, t0, t1], 0
152};
153'''
154
155microcode += cmpxchg8bCode % {"rdip": "", "sib": "sib",
156 "l": "", "ul": "",
157 "suffix": "M"}
158microcode += cmpxchg8bCode % {"rdip": "rdip t7", "sib": "riprel",
159 "l": "", "ul": "",

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