bit_scan.py (5423:536fb3cc5a9b) bit_scan.py (5661:443e6f925027)
1# Copyright (c) 2008 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

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81#
82# Authors: Gabe Black
83
84microcode = '''
85def macroop BSR_R_R {
86 # Determine if the input was zero, and also move it to a temp reg.
87 movi t1, t1, t0, dataSize=8
88 and t1, regm, regm, flags=(ZF,)
1# Copyright (c) 2008 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

--- 72 unchanged lines hidden (view full) ---

81#
82# Authors: Gabe Black
83
84microcode = '''
85def macroop BSR_R_R {
86 # Determine if the input was zero, and also move it to a temp reg.
87 movi t1, t1, t0, dataSize=8
88 and t1, regm, regm, flags=(ZF,)
89 bri t0, label("end"), flags=(CZF,)
89 br label("end"), flags=(CZF,)
90
91 # Zero out the result register
92 movi reg, reg, 0x0
93
94 # Bit 6
95 srli t3, t1, 32, dataSize=8, flags=(EZF,)
96 ori t4, reg, 0x20
97 mov reg, reg, t4, flags=(nCEZF,)

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132
133def macroop BSR_R_M {
134
135 movi t1, t1, t0, dataSize=8
136 ld t1, seg, sib, disp
137
138 # Determine if the input was zero, and also move it to a temp reg.
139 and t1, t1, t1, flags=(ZF,)
90
91 # Zero out the result register
92 movi reg, reg, 0x0
93
94 # Bit 6
95 srli t3, t1, 32, dataSize=8, flags=(EZF,)
96 ori t4, reg, 0x20
97 mov reg, reg, t4, flags=(nCEZF,)

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132
133def macroop BSR_R_M {
134
135 movi t1, t1, t0, dataSize=8
136 ld t1, seg, sib, disp
137
138 # Determine if the input was zero, and also move it to a temp reg.
139 and t1, t1, t1, flags=(ZF,)
140 bri t0, label("end"), flags=(CZF,)
140 br label("end"), flags=(CZF,)
141
142 # Zero out the result register
143 movi reg, reg, 0x0
144
145 # Bit 6
146 srli t3, t1, 32, dataSize=8, flags=(EZF,)
147 ori t4, reg, 0x20
148 mov reg, reg, t4, flags=(nCEZF,)

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184def macroop BSR_R_P {
185
186 rdip t7
187 movi t1, t1, t0, dataSize=8
188 ld t1, seg, riprel, disp
189
190 # Determine if the input was zero, and also move it to a temp reg.
191 and t1, t1, t1, flags=(ZF,)
141
142 # Zero out the result register
143 movi reg, reg, 0x0
144
145 # Bit 6
146 srli t3, t1, 32, dataSize=8, flags=(EZF,)
147 ori t4, reg, 0x20
148 mov reg, reg, t4, flags=(nCEZF,)

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184def macroop BSR_R_P {
185
186 rdip t7
187 movi t1, t1, t0, dataSize=8
188 ld t1, seg, riprel, disp
189
190 # Determine if the input was zero, and also move it to a temp reg.
191 and t1, t1, t1, flags=(ZF,)
192 bri t0, label("end"), flags=(CZF,)
192 br label("end"), flags=(CZF,)
193
194 # Zero out the result register
195 movi reg, reg, 0x0
196
197 # Bit 6
198 srli t3, t1, 32, dataSize=8, flags=(EZF,)
199 ori t4, reg, 0x20
200 mov reg, reg, t4, flags=(nCEZF,)

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232end:
233 fault "NoFault"
234};
235
236def macroop BSF_R_R {
237 # Determine if the input was zero, and also move it to a temp reg.
238 mov t1, t1, t0, dataSize=8
239 and t1, regm, regm, flags=(ZF,)
193
194 # Zero out the result register
195 movi reg, reg, 0x0
196
197 # Bit 6
198 srli t3, t1, 32, dataSize=8, flags=(EZF,)
199 ori t4, reg, 0x20
200 mov reg, reg, t4, flags=(nCEZF,)

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232end:
233 fault "NoFault"
234};
235
236def macroop BSF_R_R {
237 # Determine if the input was zero, and also move it to a temp reg.
238 mov t1, t1, t0, dataSize=8
239 and t1, regm, regm, flags=(ZF,)
240 bri t0, label("end"), flags=(CZF,)
240 br label("end"), flags=(CZF,)
241
242 # Zero out the result register
243 movi reg, reg, 0
244
245 subi t2, t1, 1
246 xor t1, t2, t1
247
248

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287
288def macroop BSF_R_M {
289
290 mov t1, t1, t0, dataSize=8
291 ld t1, seg, sib, disp
292
293 # Determine if the input was zero, and also move it to a temp reg.
294 and t1, t1, t1, flags=(ZF,)
241
242 # Zero out the result register
243 movi reg, reg, 0
244
245 subi t2, t1, 1
246 xor t1, t2, t1
247
248

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287
288def macroop BSF_R_M {
289
290 mov t1, t1, t0, dataSize=8
291 ld t1, seg, sib, disp
292
293 # Determine if the input was zero, and also move it to a temp reg.
294 and t1, t1, t1, flags=(ZF,)
295 bri t0, label("end"), flags=(CZF,)
295 br label("end"), flags=(CZF,)
296
297 # Zero out the result register
298 mov reg, reg, t0
299
300 subi t2, t1, 1
301 xor t1, t2, t1
302
303 # Bit 6

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343def macroop BSF_R_P {
344
345 rdip t7
346 mov t1, t1, t0, dataSize=8
347 ld t1, seg, riprel, disp
348
349 # Determine if the input was zero, and also move it to a temp reg.
350 and t1, t1, t1, flags=(ZF,)
296
297 # Zero out the result register
298 mov reg, reg, t0
299
300 subi t2, t1, 1
301 xor t1, t2, t1
302
303 # Bit 6

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343def macroop BSF_R_P {
344
345 rdip t7
346 mov t1, t1, t0, dataSize=8
347 ld t1, seg, riprel, disp
348
349 # Determine if the input was zero, and also move it to a temp reg.
350 and t1, t1, t1, flags=(ZF,)
351 bri t0, label("end"), flags=(CZF,)
351 br label("end"), flags=(CZF,)
352
353 # Zero out the result register
354 mov reg, reg, t0
355
356 subi t2, t1, 1
357 xor t1, t2, t1
358
359 # Bit 6

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353 # Zero out the result register
354 mov reg, reg, t0
355
356 subi t2, t1, 1
357 xor t1, t2, t1
358
359 # Bit 6

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