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...A tutorial on adding new instructions to the oracle java hotspot virtual machine vasanth venkatachalam senior software engineer amd introduction architecture specific code generation changes for programs often require modifying jvm support target or sequences of these this article discusses how add using as running example addition an instruction sequence floating point conditional move optimization we begin by introducing and giving overview model uses when compiling bytecode native then describe required in moves end reader should better understand process that their own optimizations assumes platform is x but techniques outline will apply any consistency readability all examples presented use masm syntax most compilers generate if else constructs emitting compare branch consider i typical emitted above would be cmp edx ecx jge elseblock jump past jmp compares value with scalar sets condition flags rflags register indicate result checks causes program execution either label marked fa...