1# Copyright (c) 2007-2008 The Hewlett-Packard Development Company 2# All rights reserved. 3# 4# Redistribution and use of this software in source and binary forms, 5# with or without modification, are permitted provided that the 6# following conditions are met: 7# 8# The software must be used only for Non-Commercial Use which means any 9# use which is NOT directed to receiving any direct monetary 10# compensation for, or commercial advantage from such use. Illustrative 11# examples of non-commercial use are academic research, personal study, 12# teaching, education and corporate research & development. 13# Illustrative examples of commercial use are distributing products for 14# commercial advantage and providing services using the software for 15# commercial advantage. 16# 17# If you wish to use this software or functionality therein that may be 18# covered by patents for commercial use, please contact: 19# Director of Intellectual Property Licensing 20# Office of Strategy and Technology 21# Hewlett-Packard Company 22# 1501 Page Mill Road 23# Palo Alto, California 94304 24# 25# Redistributions of source code must retain the above copyright notice, 26# this list of conditions and the following disclaimer. Redistributions 27# in binary form must reproduce the above copyright notice, this list of 28# conditions and the following disclaimer in the documentation and/or 29# other materials provided with the distribution. Neither the name of 30# the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 31# contributors may be used to endorse or promote products derived from 32# this software without specific prior written permission. No right of 33# sublicense is granted herewith. Derivatives of the software and 34# output created using the software may be prepared, but only for 35# Non-Commercial Uses. Derivatives of the software may be shared with 36# others provided: (i) the others agree to abide by the list of 37# conditions herein which includes the Non-Commercial Use restrictions; 38# and (ii) such Derivatives of the software include the above copyright 39# notice to acknowledge the contribution from this software where 40# applicable, this list of conditions and the disclaimer below. 41# 42# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 43# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 44# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 45# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 46# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 47# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 48# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 49# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 50# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 51# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 52# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 53# 54# Authors: Gabe Black 55 56microcode = ''' 57def macroop SCAS_M { 58 # Find the constant we need to either add or subtract from rdi 59 ruflag t0, 10 60 movi t2, t2, dsz, flags=(CEZF,), dataSize=asz 61 subi t3, t0, dsz, dataSize=asz 62 mov t2, t2, t3, flags=(nCEZF,), dataSize=asz 63 64 ld t1, es, [1, t0, rdi] 65 sub t0, t1, rax, flags=(OF, SF, ZF, AF, PF, CF) 66 67 add rdi, rdi, t2, dataSize=asz 68}; 69 70# 71# Versions which have the rep prefix. These could benefit from some loop 72# unrolling. 73# 74 75def macroop SCAS_E_M { 76 and t0, rcx, rcx, flags=(EZF,), dataSize=asz
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77 bri t0, label("end"), flags=(CEZF,)
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77 br label("end"), flags=(CEZF,) |
78 79 # Find the constant we need to either add or subtract from rdi 80 ruflag t0, 10 81 movi t2, t2, dsz, flags=(CEZF,), dataSize=asz 82 subi t3, t0, dsz, dataSize=asz 83 mov t2, t2, t3, flags=(nCEZF,), dataSize=asz 84 85topOfLoop: 86 ld t1, es, [1, t0, rdi] 87 sub t0, t1, rax, flags=(OF, SF, ZF, AF, PF, CF) 88 89 subi rcx, rcx, 1, flags=(EZF,), dataSize=asz 90 add rdi, rdi, t2, dataSize=asz
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91 bri t0, label("topOfLoop"), flags=(CSTRZnEZF,)
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91 br label("topOfLoop"), flags=(CSTRZnEZF,) |
92end: 93 fault "NoFault" 94}; 95 96def macroop SCAS_N_M { 97 and t0, rcx, rcx, flags=(EZF,), dataSize=asz
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98 bri t0, label("end"), flags=(CEZF,)
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98 br label("end"), flags=(CEZF,) |
99 100 # Find the constant we need to either add or subtract from rdi 101 ruflag t0, 10 102 movi t2, t2, dsz, flags=(CEZF,), dataSize=asz 103 subi t3, t0, dsz, dataSize=asz 104 mov t2, t2, t3, flags=(nCEZF,), dataSize=asz 105 106topOfLoop: 107 ld t1, es, [1, t0, rdi] 108 sub t0, t1, rax, flags=(OF, SF, ZF, AF, PF, CF) 109 110 subi rcx, rcx, 1, flags=(EZF,), dataSize=asz 111 add rdi, rdi, t2, dataSize=asz
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112 bri t0, label("topOfLoop"), flags=(CSTRnZnEZF,)
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112 br label("topOfLoop"), flags=(CSTRnZnEZF,) |
113end: 114 fault "NoFault" 115}; 116 117'''
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