stack_operations.py revision 5179:9ea5593e01f2 
1# Copyright (c) 2007 The Hewlett-Packard Development Company
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42# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
43# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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45# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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53#
54# Authors: Gabe Black
55
56microcode = '''
57def macroop POP_R {
58    # Make the default data size of pops 64 bits in 64 bit mode
59    .adjust_env oszIn64Override
60
61    ld t1, ss, [1, t0, rsp]
62    addi rsp, rsp, dsz
63    mov reg, reg, t1
64};
65
66def macroop POP_M {
67    # Make the default data size of pops 64 bits in 64 bit mode
68    .adjust_env oszIn64Override
69
70    ld t1, ss, [1, t0, rsp]
71    cda seg, sib, disp
72    addi rsp, rsp, dsz
73    st t1, seg, sib, disp
74};
75
76def macroop POP_P {
77    # Make the default data size of pops 64 bits in 64 bit mode
78    .adjust_env oszIn64Override
79
80    rdip t7
81    ld t1, ss, [1, t0, rsp]
82    cda seg, sib, disp
83    addi rsp, rsp, dsz
84    st t1, seg, riprel, disp
85};
86
87def macroop PUSH_R {
88    # Make the default data size of pops 64 bits in 64 bit mode
89    .adjust_env oszIn64Override
90
91    stupd reg, ss, [1, t0, rsp], "-env.dataSize"
92};
93
94def macroop PUSH_I {
95    # Make the default data size of pops 64 bits in 64 bit mode
96    .adjust_env oszIn64Override
97
98    limm t1, imm
99    stupd t1, ss, [1, t0, rsp], "-env.dataSize"
100};
101
102def macroop PUSH_M {
103    # Make the default data size of pops 64 bits in 64 bit mode
104    .adjust_env oszIn64Override
105
106    ld t1, seg, sib, disp
107    stupd t1, ss, [1, t0, rsp], "-env.dataSize"
108};
109
110def macroop PUSH_P {
111    # Make the default data size of pops 64 bits in 64 bit mode
112    .adjust_env oszIn64Override
113
114    rdip t7
115    ld t1, seg, riprel, disp
116    stupd t1, ss, [1, t0, rsp], "-env.dataSize"
117};
118
119def macroop PUSHA {
120    # Check all the stack addresses. We'll assume that if the beginning and
121    # end are ok, then the stuff in the middle should be as well.
122    cda ss, [1, t0, rsp], "-env.dataSize"
123    cda ss, [1, t0, rsp], "-8 * env.dataSize"
124    stupd rax, ss, [1, t0, rsp], "-env.dataSize"
125    stupd rcx, ss, [1, t0, rsp], "-env.dataSize"
126    stupd rdx, ss, [1, t0, rsp], "-env.dataSize"
127    stupd rbx, ss, [1, t0, rsp], "-env.dataSize"
128    stupd rsp, ss, [1, t0, rsp], "-env.dataSize"
129    stupd rbp, ss, [1, t0, rsp], "-env.dataSize"
130    stupd rsi, ss, [1, t0, rsp], "-env.dataSize"
131    stupd rdi, ss, [1, t0, rsp], "-env.dataSize"
132};
133
134def macroop POPA {
135    # Check all the stack addresses. We'll assume that if the beginning and
136    # end are ok, then the stuff in the middle should be as well.
137    ld t1, ss, [1, t0, rsp], "0 * env.dataSize"
138    ld t2, ss, [1, t0, rsp], "7 * env.dataSize"
139    mov rdi, rdi, t1
140    ld rsi, ss, [1, t0, rsp], "1 * env.dataSize"
141    ld rbp, ss, [1, t0, rsp], "2 * env.dataSize"
142    ld rbx, ss, [1, t0, rsp], "4 * env.dataSize"
143    ld rdx, ss, [1, t0, rsp], "5 * env.dataSize"
144    ld rcx, ss, [1, t0, rsp], "6 * env.dataSize"
145    mov rax, rax, t2
146    addi rsp, rsp, "8 * env.dataSize"
147};
148
149def macroop LEAVE {
150    # Make the default data size of pops 64 bits in 64 bit mode
151    .adjust_env oszIn64Override
152
153    mov t1, t1, rbp
154    ld rbp, ss, [1, t0, t1]
155    mov rsp, rsp, t1
156    addi rsp, rsp, dsz
157};
158
159def macroop ENTER_I_I {
160    # This needs to check all the addresses it writes to before it actually
161    # writes any values.
162
163    # Pull the different components out of the immediate
164    limm t1, imm
165    zext t2, t1, 16, dataSize=2
166    srl t1, t1, 16
167    zext t1, t1, 6
168    # t1 is now the masked nesting level, and t2 is the amount of storage.
169
170    # Push rbp.
171    stupd rbp, ss, [1, t0, rsp], "-env.dataSize"
172
173    # Save the stack pointer for later
174    mov t6, t6, rsp
175
176    # If the nesting level is zero, skip all this stuff.
177    subi t0, t1, t0, flags=(EZF,), dataSize=2
178    bri t0, label("skipLoop"), flags=(CEZF,)
179
180    # If the level was 1, only push the saved rbp
181    subi t0, t1, 1, flags=(EZF,)
182    bri t0, label("bottomOfLoop"), flags=(CEZF,)
183
184    limm t4, "ULL(-1)", dataSize=8
185topOfLoop:
186    ld t5, ss, [dsz, t4, rbp]
187    stupd t5, ss, [1, t0, rsp], "-env.dataSize"
188
189    # If we're not done yet, loop
190    subi t4, t4, 1, dataSize=8
191    add t0, t4, t1, flags=(EZF,)
192    bri t0, label("topOfLoop"), flags=(nCEZF,)
193
194bottomOfLoop:
195    # Push the old rbp onto the stack
196    stupd t6, ss, [1, t0, rsp], "-env.dataSize"
197
198skipLoop:
199    sub rsp, rsp, t2
200    mov rbp, rbp, t6
201};
202'''
203