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#
#Copyright (c) 2019 Intel Corporation
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#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
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#  distributed under the License is distributed on an "AS IS" BASIS,
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#END_LEGAL
INSTRUCTIONS():: 

# LZCNT reg16, reg/mem16 F30FBD /r
# LZCNT reg32, reg/mem32 F30FBD /r
# LZCNT reg64, reg/mem64 F30FBD /r

{
ICLASS    : LZCNT
# This replace the AMD version in LZCNT builds
VERSION   : 2 
CPL       : 3
CATEGORY  : LZCNT
EXTENSION : LZCNT
COMMENT   : These next one WAS introduced first by AMD circa SSE4a.
FLAGS     : MUST [ cf-mod zf-mod of-u af-u pf-u sf-u ]
PATTERN   : 0x0F 0xBD f3_refining_prefix LZCNT=1 MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM() 
OPERANDS  : REG0=GPRv_R():w:v     MEM0:r:v     
PATTERN   : 0x0F 0xBD f3_refining_prefix LZCNT=1 MOD[0b11] MOD=3 REG[rrr] RM[nnn]
OPERANDS  : REG0=GPRv_R():w:v     REG1=GPRv_B():r:v
}


{
ICLASS    : BSR
VERSION   : 2
COMMENT   : AMD reused 0FBD for LZCNT and made BSR not have a refining prefix.  This version replaces the normal version of BSR
CPL       : 3
CATEGORY  : BITBYTE
EXTENSION : BASE
ISA_SET   : I386
FLAGS     : MUST [ of-u sf-u zf-mod af-u pf-u cf-u ]
PATTERN   : 0x0F 0xBD not_refining_f3 MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM()
OPERANDS  : REG0=GPRv_R():cw MEM0:r:v

PATTERN   : 0x0F 0xBD not_refining_f3 MOD[0b11] MOD=3 REG[rrr] RM[nnn]
OPERANDS  : REG0=GPRv_R():cw REG1=GPRv_B():r

PATTERN   : 0x0F 0xBD  refining_f3 LZCNT=0 MOD[mm] MOD!=3 REG[rrr] RM[nnn] MODRM()
OPERANDS  : REG0=GPRv_R():cw MEM0:r:v

PATTERN   : 0x0F 0xBD  refining_f3 LZCNT=0 MOD[0b11] MOD=3 REG[rrr] RM[nnn]
OPERANDS  : REG0=GPRv_R():cw REG1=GPRv_B():r
}