1# Copyright (c) 2007-2008 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 = '''
39def macroop CMPS_M_M {
40    # Find the constant we need to either add or subtract from rdi
41    ruflag t0, 10
42    movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
43    subi t4, t0, dsz, dataSize=asz
44    mov t3, t3, t4, flags=(nCEZF,), dataSize=asz
45
46    ld t1, seg, [1, t0, rsi]
47    ld t2, es, [1, t0, rdi]
48    sub t0, t1, t2, flags=(OF, SF, ZF, AF, PF, CF)
49
50    add rdi, rdi, t3, dataSize=asz
51    add rsi, rsi, t3, dataSize=asz
52};
53
54#
55# Versions which have the rep prefix. These could benefit from some loop
56# unrolling.
57#
58
59def macroop CMPS_E_M_M {
60    and t0, rcx, rcx, flags=(EZF,), dataSize=asz
61    br label("end"), flags=(CEZF,)
62
63    # Find the constant we need to either add or subtract from rdi
64    ruflag t0, 10
65    movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
66    subi t4, t0, dsz, dataSize=asz
67    mov t3, t3, t4, flags=(nCEZF,), dataSize=asz
68
69topOfLoop:
70    ld t1, seg, [1, t0, rsi]
71    ld t2, es, [1, t0, rdi]
72    sub t0, t1, t2, flags=(OF, SF, ZF, AF, PF, CF)
73
74    subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
75    add rdi, rdi, t3, dataSize=asz
76    add rsi, rsi, t3, dataSize=asz
77    br label("topOfLoop"), flags=(CSTRZnEZF,)
78end:
79    fault "NoFault"
80};
81
82def macroop CMPS_N_M_M {
83    and t0, rcx, rcx, flags=(EZF,), dataSize=asz
84    br label("end"), flags=(CEZF,)
85
86    # Find the constant we need to either add or subtract from rdi
87    ruflag t0, 10
88    movi t3, t3, dsz, flags=(CEZF,), dataSize=asz
89    subi t4, t0, dsz, dataSize=asz
90    mov t3, t3, t4, flags=(nCEZF,), dataSize=asz
91
92topOfLoop:
93    ld t1, seg, [1, t0, rsi]
94    ld t2, es, [1, t0, rdi]
95    sub t0, t1, t2, flags=(OF, SF, ZF, AF, PF, CF)
96
97    subi rcx, rcx, 1, flags=(EZF,), dataSize=asz
98    add rdi, rdi, t3, dataSize=asz
99    add rsi, rsi, t3, dataSize=asz
100    br label("topOfLoop"), flags=(CSTRnZnEZF,)
101end:
102    fault "NoFault"
103};
104'''
105