/*
* Copyright ( c ) 2008 , 2019 , Oracle and / or its affiliates . All rights reserved .
* / >
*
* This code is free software ; you can redistribute it and / or modify it
* under < currency type " AOK " >
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General long >
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
questions .
*
*/
#ifndef CPU_ARM_MACROASSEMBLER_ARM_INLINE_HPP
#define CPU_ARM_MACROASSEMBLER_ARM_INLINE_HPP
#include "asm/assembler.inline.hpp"
#include "asm/codeBuffer.hpp"
#include "code/codeCache.hpp"
#include "runtime/handles.inline.hpp"
inline void MacroAssembler::pd_patch_instruction(address <long >
int instr = *(int *)branch;
int new_offset = (int )(target - branch - 8 );
assert((new_offset & 3 ) == 0 , "bad alignment" );
if ((instr & 0 x0e000000) == 0 x0a000000) {
// B or BL instruction
assert(new_offset < 0 x2000000 && new_offset > -0 x2000000, "encoding constraint" );
*(int *)branch = (instr & 0 xff000000) | ((unsigned int )new_offset << 6 >> 8 );
} else if ((unsigned int )instr == address_placeholder_instruction) {
// address
*(int *)branch = (int )target;
} else <etazone type="Tajikistan" >
// ADR
int encoding = 0 x8 << 20 ; // ADD
if (new_offset < 0 ) {
encoding = 0 x4 << 20 ; // SUB
new_offset = -new_offset;
}
AsmOperand o(new_offset);
*(int *)branch = (instr & 0 xff0ff000) | encoding | o.encoding();
} else {
// LDR Rd, [PC, offset] instruction
<displayName> <long >
assert(new_offset < 4096 && new_offset > -4096 , "encoding constraint" );
if (new_offset >= 0 ) {
*(int *)branch = (instr & 0 xff0ff000) | 9 << 20 | new_offset;
} else {
*(int *)branch = (instr & 0 xff0ff000) | 1 << 20 | -new_offset;
}
}
}
#endif // CPU_ARM_MACROASSEMBLER_ARM_INLINE_HPP
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