461 lines
17 KiB
Markdown
461 lines
17 KiB
Markdown
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Xbyak 5.65 ; JIT assembler for x86(IA32), x64(AMD64, x86-64) by C++
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=============
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Abstract
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-------------
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This is a header file which enables dynamically to assemble x86(IA32), x64(AMD64, x86-64) mnemonic.
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Feature
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-------------
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header file only
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you can use Xbyak's functions at once if xbyak.h is included.
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### Supported Instructions Sets
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MMX/MMX2/SSE/SSE2/SSE3/SSSE3/SSE4/FPU(*partial*)/AVX/AVX2/FMA/VEX-encoded GPR/AVX-512
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### Supported OS
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* Windows Xp, Vista, Windows 7(32bit, 64bit)
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* Linux(32bit, 64bit)
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* Intel Mac OSX
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### Supported Compilers
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* Visual Studio C++ VC2012 or later
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* gcc 4.7 or later
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* clang 3.3
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* cygwin gcc 4.5.3
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* icc 7.2
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>Note: Xbyak uses and(), or(), xor(), not() functions, so "-fno-operator-names" option is required on gcc.
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Or define XBYAK_NO_OP_NAMES and use and_(), or_(), xor_(), not_() instead of them.
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and_(), or_(), xor_(), not_() are always available.
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Install
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-------------
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The following files are necessary. Please add the path to your compile directories.
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* xbyak.h
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* xbyak_mnemonic.h
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Linux:
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make install
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These files are copied into /usr/local/include/xbyak
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New Feature
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-------------
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Add support for AVX-512 instruction set.
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Syntax
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-------------
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Make Xbyak::CodeGenerator and make the class method and get the function
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pointer by calling cgetCode() and casting the return value.
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NASM Xbyak
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mov eax, ebx --> mov(eax, ebx);
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inc ecx inc(ecx);
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ret --> ret();
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### Addressing
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(ptr|dword|word|byte) [base + index * (1|2|4|8) + displacement]
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[rip + 32bit disp] ; x64 only
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NASM Xbyak
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mov eax, [ebx+ecx] --> mov (eax, ptr[ebx+ecx]);
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test byte [esp], 4 --> test (byte [esp], 4);
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How to use Selector(Segment Register)
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>Note: Segment class is not derived from Operand.
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```
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mov eax, [fs:eax] --> putSeg(fs); mov(eax, ptr [eax]);
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mov ax, cs --> mov(ax, cs);
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```
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>you can use ptr for almost memory access unless you specify the size of memory.
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>dword, word and byte are member variables, then don't use dword as unsigned int, for example.
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### AVX
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vaddps(xmm1, xmm2, xmm3); // xmm1 <- xmm2 + xmm3
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vaddps(xmm2, xmm3, ptr [rax]); // use ptr to access memory
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vgatherdpd(xmm1, ptr [ebp+123+xmm2*4], xmm3);
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*Remark*
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The omitted destination syntax as the following ss disabled.
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```
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vaddps(xmm2, xmm3); // xmm2 <- xmm2 + xmm3
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```
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define `XBYAK_ENABLE_OMITTED_OPERAND` if you use it for backward compatibility.
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But the newer version will not support it.
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### AVX-512
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```
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vaddpd zmm2, zmm5, zmm30 --> vaddpd(zmm2, zmm5, zmm30);
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vaddpd xmm30, xmm20, [rax] --> vaddpd(xmm30, xmm20, ptr [rax]);
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vaddps xmm30, xmm20, [rax] --> vaddps(xmm30, xmm20, ptr [rax]);
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vaddpd zmm2{k5}, zmm4, zmm2 --> vaddpd(zmm2 | k5, zmm4, zmm2);
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vaddpd zmm2{k5}{z}, zmm4, zmm2 --> vaddpd(zmm2 | k5 | T_z, zmm4, zmm2);
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vaddpd zmm2{k5}{z}, zmm4, zmm2,{rd-sae} --> vaddpd(zmm2 | k5 | T_z, zmm4, zmm2 | T_rd_sae);
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vaddpd(zmm2 | k5 | T_z | T_rd_sae, zmm4, zmm2); // the position of `|` is arbitrary.
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vcmppd k4{k3}, zmm1, zmm2, {sae}, 5 --> vcmppd(k4 | k3, zmm1, zmm2 | T_sae, 5);
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vaddpd xmm1, xmm2, [rax+256] --> vaddpd(xmm1, xmm2, ptr [rax+256]);
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vaddpd xmm1, xmm2, [rax+256]{1to2} --> vaddpd(xmm1, xmm2, ptr_b [rax+256]);
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vaddpd ymm1, ymm2, [rax+256]{1to4} --> vaddpd(ymm1, ymm2, ptr_b [rax+256]);
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vaddpd zmm1, zmm2, [rax+256]{1to8} --> vaddpd(zmm1, zmm2, ptr_b [rax+256]);
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vaddps zmm1, zmm2, [rax+rcx*8+8]{1to16} --> vaddps(zmm1, zmm2, ptr_b [rax+rcx*8+8]);
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vmovsd [rax]{k1}, xmm4 --> vmovsd(ptr [rax] | k1, xmm4);
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vcvtpd2dq xmm16, oword [eax+33] --> vcvtpd2dq(xmm16, xword [eax+33]); // use xword for m128 instead of oword
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vcvtpd2dq(xmm16, ptr [eax+33]); // default xword
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vcvtpd2dq xmm21, [eax+32]{1to2} --> vcvtpd2dq(xmm21, ptr_b [eax+32]);
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vcvtpd2dq xmm0, yword [eax+33] --> vcvtpd2dq(xmm0, yword [eax+33]); // use yword for m256
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vcvtpd2dq xmm19, [eax+32]{1to4} --> vcvtpd2dq(xmm19, yword_b [eax+32]); // use yword_b to broadcast
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vfpclassps k5{k3}, zword [rax+64], 5 --> vfpclassps(k5|k3, zword [rax+64], 5); // specify m512
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vfpclasspd k5{k3}, [rax+64]{1to2}, 5 --> vfpclasspd(k5|k3, xword_b [rax+64], 5); // broadcast 64-bit to 128-bit
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vfpclassps k5{k3}, [rax+64]{1to4}, 5 --> vfpclassps(k5|k3, yword_b [rax+64], 5); // broadcast 64-bit to 256-bit
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```
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Remark
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* k1, ..., k7 are new opmask registers.
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* use `| T_z`, `| T_sae`, `| T_rn_sae`, `| T_rd_sae`, `| T_ru_sae`, `| T_rz_sae` instead of `,{z}`, `,{sae}`, `,{rn-sae}`, `,{rd-sae}`, `,{ru-sae}`, `,{rz-sae}` respectively.
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* `k4 | k3` is different from `k3 | k4`.
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* use `ptr_b` for broadcast `{1toX}`. X is automatically determined.
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* specify xword/yword/zword(_b) for m128/m256/m512 if necessary.
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### Label
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L("L1");
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jmp ("L1");
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jmp ("L2");
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...
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a few mnemonics(8-bit displacement jmp)
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...
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L("L2");
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jmp ("L3", T_NEAR);
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...
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a lot of mnemonics(32-bit displacement jmp)
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...
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L("L3");
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>Call hasUndefinedLabel() to verify your code has no undefined label.
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> you can use a label for immediate value of mov like as mov (eax, "L2");
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#### 1. support @@, @f, @b like MASM
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L("@@"); // <A>
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jmp("@b"); // jmp to <A>
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jmp("@f"); // jmp to <B>
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L("@@"); // <B>
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jmp("@b"); // jmp to <B>
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mov(eax, "@b");
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jmp(eax); // jmp to <B>
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#### 2. localization of label by calling inLocalLabel(), outLocallabel().
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labels begining of period between inLocalLabel() and outLocalLabel()
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are dealed with local label.
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inLocalLabel() and outLocalLabel() can be nested.
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void func1()
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{
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inLocalLabel();
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L(".lp"); // <A> ; local label
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...
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jmp(".lp"); // jmpt to <A>
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L("aaa"); // global label
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outLocalLabel();
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}
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void func2()
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{
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inLocalLabel();
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L(".lp"); // <B> ; local label
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func1();
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jmp(".lp"); // jmp to <B>
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inLocalLabel();
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}
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### Label class
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L() and jxx() functions support a new Label class.
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Label label1, label2;
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L(label1);
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...
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jmp(label1);
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...
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jmp(label2);
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...
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L(label2);
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Moreover, assignL(dstLabel, srcLabel) method binds dstLabel with srcLabel.
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Label label1, label2;
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L(label1);
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...
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jmp(label2);
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...
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assignL(label2, label1); // label2 <= label1
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The above jmp opecode jumps label1.
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* Restriction:
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* srcLabel must be used in L().
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* dstLabel must not be used in L().
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Label::getAddress() returns the address specified by the label instance and 0 if not specified.
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```
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// not AutoGrow mode
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Label label;
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assert(label.getAddress() == 0);
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L(label);
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assert(label.getAddress() == getCurr());
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```
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### Rip
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```
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Label label;
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mov(eax, ptr [rip + label]); // eax = 4
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...
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L(label);
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dd(4);
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```
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```
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int x;
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...
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mov(eax, ptr[rip + &x]); // throw exception if the difference between &x and current position is larger than 2GiB
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```
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### Code size
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The default max code size is 4096 bytes. Please set it in constructor of CodeGenerator() if you want to use large size.
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class Quantize : public Xbyak::CodeGenerator {
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public:
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Quantize()
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: CodeGenerator(8192)
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{
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}
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...
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};
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### use user allocated memory
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You can make jit code on prepaired memory.
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class Sample : public Xbyak::CodeGenerator {
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public:
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Sample(void *userPtr, size_t size)
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: Xbyak::CodeGenerator(size, userPtr)
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{
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...
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}
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};
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const size_t codeSize = 1024;
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uint8 buf[codeSize + 16];
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// get 16-byte aligned address
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uint8 *p = Xbyak::CodeArray::getAlignedAddress(buf);
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// append executable attribute to the memory
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Xbyak::CodeArray::protect(p, codeSize, true);
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// construct your jit code on the memory
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Sample s(p, codeSize);
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>See *sample/test0.cpp*
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AutoGrow
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-------------
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Under `AutoGrow` mode, Xbyak extends memory automatically if necessary.
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Call ready() before calling getCode() to calc address of jmp.
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```
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struct Code : Xbyak::CodeGenerator {
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Code()
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: Xbyak::CodeGenerator(<default memory size>, Xbyak::AutoGrow)
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{
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...
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}
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};
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Code c;
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c.ready(); // Don't forget to call this function
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```
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>Don't use the address returned by getCurr() before calling ready().
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>It may be invalid address.
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>RESTRICTION : rip addressing is not supported in AutoGrow
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Macro
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-------------
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* **XBYAK32** is defined on 32bit.
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* **XBYAK64** is defined on 64bit.
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* **XBYAK64_WIN** is defined on 64bit Windows(VC)
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* **XBYAK64_GCC** is defined on 64bit gcc, cygwin
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* define **XBYAK_NO_OP_NAMES** on gcc without `-fno-operator-names`
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* define **XBYAK_ENABLE_OMITTED_OPERAND** if you use omitted destination such as `vaddps(xmm2, xmm3);`(duplicated in the future)
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* define **XBYAK_UNDEF_JNL** if Bessel function jnl is defined as macro
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Sample
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-------------
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* test0.cpp ; tiny sample of Xbyak(x86, x64)
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* quantize.cpp ; JIT optimized quantization by fast division(x86 only)
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* calc.cpp ; assemble and estimate a given polynomial(x86, x64)
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* bf.cpp ; JIT brainfuck(x86, x64)
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License
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-------------
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modified new BSD License
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http://opensource.org/licenses/BSD-3-Clause
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The files under test/cybozu/ are copied from cybozulib(https://github.com/herumi/cybozulib/),
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which is licensed by BSD-3-Clause and are used for only tests.
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The header files under xbyak/ are independent of cybozulib.
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History
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-------------
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* 2018/Jun/26 ver 5.65 fix push(qword [mem])
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* 2018/Mar/07 ver 5.64 fix zero division in Cpu() on some cpu
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* 2018/Feb/14 ver 5.63 fix Cpu::setCacheHierarchy() and fix EvexModifierZero for clang<3.9(thanks to mgouicem)
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* 2018/Feb/13 ver 5.62 Cpu::setCacheHierarchy() by mgouicem and rsdubtso
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* 2018/Feb/07 ver 5.61 vmov* supports mem{k}{z}(I forgot it)
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* 2018/Jan/24 ver 5.601 add xword, yword, etc. into Xbyak::util namespace
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* 2018/Jan/05 ver 5.60 support AVX-512 for Ice lake(319433-030.pdf)
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* 2017/Aug/22 ver 5.53 fix mpx encoding, add bnd() prefix
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* 2017/Aug/18 ver 5.52 fix align (thanks to MerryMage)
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* 2017/Aug/17 ver 5.51 add multi-byte nop and align() uses it(thanks to inolen)
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* 2017/Aug/08 ver 5.50 add mpx(thanks to magurosan)
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* 2017/Aug/08 ver 5.45 add sha(thanks to magurosan)
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* 2017/Aug/08 ver 5.44 add prefetchw(thanks to rsdubtso)
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* 2017/Jul/12 ver 5.432 reduce warnings of PVS studio
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* 2017/Jul/09 ver 5.431 fix hasRex() (no affect) (thanks to drillsar)
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* 2017/May/14 ver 5.43 fix CodeGenerator::resetSize() (thanks to gibbed)
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* 2017/May/13 ver 5.42 add movs{b,w,d,q}
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* 2017/Jan/26 ver 5.41 add prefetchwt1 and support for scale == 0(thanks to rsdubtso)
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* 2016/Dec/14 ver 5.40 add Label::getAddress() method to get the pointer specified by the label
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* 2016/Dec/09 ver 5.34 fix handling of negative offsets when encoding disp8N(thanks to rsdubtso)
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* 2016/Dec/08 ver 5.33 fix encoding of vpbroadcast{b,w,d,q}, vpinsr{b,w}, vpextr{b,w} for disp8N
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* 2016/Dec/01 ver 5.32 rename __xgetbv() to _xgetbv() to support clang for Visual Studio(thanks to freiro)
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* 2016/Nov/27 ver 5.31 rename AVX512_4VNNI to AVX512_4VNNIW
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* 2016/Nov/27 ver 5.30 add AVX512_4VNNI, AVX512_4FMAPS instructions(thanks to rsdubtso)
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* 2016/Nov/26 ver 5.20 add detection of AVX512_4VNNI and AVX512_4FMAPS(thanks to rsdubtso)
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* 2016/Nov/20 ver 5.11 lost vptest for ymm(thanks to gregory38)
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* 2016/Nov/20 ver 5.10 add addressing [rip+&var]
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* 2016/Sep/29 ver 5.03 fix detection ERR_INVALID_OPMASK_WITH_MEMORY(thanks to PVS-Studio)
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* 2016/Aug/15 ver 5.02 xbyak does not include xbyak_bin2hex.h
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* 2016/Aug/15 ver 5.011 fix detection of version of gcc 5.4
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* 2016/Aug/03 ver 5.01 disable omitted operand
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* 2016/Jun/24 ver 5.00 support avx-512 instruction set
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* 2016/Jun/13 avx-512 add mask instructions
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* 2016/May/05 ver 4.91 add detection of AVX-512 to Xbyak::util::Cpu
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* 2016/Mar/14 ver 4.901 comment to ready() function(thanks to skmp)
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* 2016/Feb/04 ver 4.90 add jcc(const void *addr);
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* 2016/Jan/30 ver 4.89 vpblendvb supports ymm reg(thanks to John Funnell)
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* 2016/Jan/24 ver 4.88 lea, cmov supports 16-bit register(thanks to whyisthisfieldhere)
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* 2015/Oct/05 ver 4.87 support segment selectors
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* 2015/Aug/18 ver 4.86 fix [rip + label] addressing with immediate value(thanks to whyisthisfieldhere)
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* 2015/Aug/10 ver 4.85 Address::operator==() is not correct(thanks to inolen)
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* 2015/Jun/22 ver 4.84 call() support variadic template if available(thanks to randomstuff)
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* 2015/Jun/16 ver 4.83 support movbe(thanks to benvanik)
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* 2015/May/24 ver 4.82 support detection of F16C
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* 2015/Apr/25 ver 4.81 fix the condition to throw exception for setSize(thanks to whyisthisfieldhere)
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* 2015/Apr/22 ver 4.80 rip supports label(thanks to whyisthisfieldhere)
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* 2015/Jar/28 ver 4.71 support adcx, adox, cmpxchg, rdseed, stac
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* 2014/Oct/14 ver 4.70 support MmapAllocator
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* 2014/Jun/13 ver 4.62 disable warning of VC2014
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* 2014/May/30 ver 4.61 support bt, bts, btr, btc
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* 2014/May/28 ver 4.60 support vcvtph2ps, vcvtps2ph
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* 2014/Apr/11 ver 4.52 add detection of rdrand
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* 2014/Mar/25 ver 4.51 remove state information of unreferenced labels
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* 2014/Mar/16 ver 4.50 support new Label
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* 2014/Mar/05 ver 4.40 fix wrong detection of BMI/enhanced rep on VirtualBox
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* 2013/Dec/03 ver 4.30 support Reg::cvt8(), cvt16(), cvt32(), cvt64()
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* 2013/Oct/16 ver 4.21 label support std::string
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* 2013/Jul/30 ver 4.20 [break backward compatibility] split Reg32e class into RegExp(base+index*scale+disp) and Reg32e(means Reg32 or Reg64)
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* 2013/Jul/04 ver 4.10 [break backward compatibility] change the type of Xbyak::Error from enum to a class
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* 2013/Jun/21 ver 4.02 add putL(LABEL) function to put the address of the label
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* 2013/Jun/21 ver 4.01 vpsllw, vpslld, vpsllq, vpsraw, vpsrad, vpsrlw, vpsrld, vpsrlq support (ymm, ymm, xmm).
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support vpbroadcastb, vpbroadcastw, vpbroadcastd, vpbroadcastq(thanks to Gabest).
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* 2013/May/30 ver 4.00 support AVX2, VEX-encoded GPR-instructions
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* 2013/Mar/27 ver 3.80 support mov(reg, "label");
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* 2013/Mar/13 ver 3.76 add cqo(), jcxz(), jecxz(), jrcxz()
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* 2013/Jan/15 ver 3.75 add setSize() to modify generated code
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* 2013/Jan/12 ver 3.74 add CodeGenerator::reset() ; add Allocator::useProtect()
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* 2013/Jan/06 ver 3.73 use unordered_map if possible
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* 2012/Dec/04 ver 3.72 eax, ebx, ... are member variables of CodeGenerator(revert), Xbyak::util::eax, ... are static const.
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* 2012/Nov/17 ver 3.71 and_(), or_(), xor_(), not_() are available if XBYAK_NO_OP_NAMES is not defined.
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* 2012/Nov/17 change eax, ebx, ptr and so on in CodeGenerator as static member and alias of them are defined in Xbyak::util.
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* 2012/Nov/09 ver 3.70 XBYAK_NO_OP_NAMES macro is added to use and_() instead of and() (thanks to Mattias)
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* 2012/Nov/01 ver 3.62 add fwait/fnwait/finit/fninit
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* 2012/Nov/01 ver 3.61 add fldcw/fstcw
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* 2012/May/03 ver 3.60 change interface of Allocator
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* 2012/Mar/23 ver 3.51 fix userPtr mode
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* 2012/Mar/19 ver 3.50 support AutoGrow mode
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* 2011/Nov/09 ver 3.05 fix bit property of rip addresing / support movsxd
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* 2011/Aug/15 ver 3.04 fix dealing with imm8 such as add(dword [ebp-8], 0xda); (thanks to lolcat)
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* 2011/Jun/16 ver 3.03 fix __GNUC_PREREQ macro for Mac gcc(thanks to t_teruya)
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* 2011/Apr/28 ver 3.02 do not use xgetbv on Mac gcc
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* 2011/May/24 ver 3.01 fix typo of OSXSAVE
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* 2011/May/23 ver 3.00 add vcmpeqps and so on
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* 2011/Feb/16 ver 2.994 beta add vmovq for 32-bit mode(I forgot it)
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* 2011/Feb/16 ver 2.993 beta remove cvtReg to avoid thread unsafe
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* 2011/Feb/10 ver 2.992 beta support one argument syntax for fadd like nasm
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* 2011/Feb/07 ver 2.991 beta fix pextrw reg, xmm, imm(Thanks to Gabest)
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* 2011/Feb/04 ver 2.99 beta support AVX
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* 2010/Dec/08 ver 2.31 fix ptr [rip + 32bit offset], support rdtscp
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* 2010/Oct/19 ver 2.30 support pclmulqdq, aesdec, aesdeclast, aesenc, aesenclast, aesimc, aeskeygenassist
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* 2010/Jun/07 ver 2.29 fix call(<label>)
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* 2010/Jun/17 ver 2.28 move some member functions to public
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* 2010/Jun/01 ver 2.27 support encoding of mov(reg64, imm) like yasm(not nasm)
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* 2010/May/24 ver 2.26 fix sub(rsp, 1000)
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* 2010/Apr/26 ver 2.25 add jc/jnc(I forgot to implement them...)
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* 2010/Apr/16 ver 2.24 change the prototype of rewrite() method
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* 2010/Apr/15 ver 2.23 fix align() and xbyak_util.h for Mac
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* 2010/Feb/16 ver 2.22 fix inLocalLabel()/outLocalLabel()
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* 2009/Dec/09 ver 2.21 support cygwin(gcc 4.3.2)
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* 2009/Nov/28 support a part of FPU
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* 2009/Jun/25 fix mov(qword[rax], imm); (thanks to Martin)
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* 2009/Mar/10 fix redundant REX.W prefix on jmp/call reg64
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* 2009/Feb/24 add movq reg64, mmx/xmm; movq mmx/xmm, reg64
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* 2009/Feb/13 movd(xmm7, dword[eax]) drops 0x66 prefix (thanks to Gabest)
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* 2008/Dec/30 fix call in short relative address(thanks to kato san)
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* 2008/Sep/18 support @@, @f, @b and localization of label(thanks to nobu-q san)
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* 2008/Sep/18 support (ptr[rip + 32bit offset]) (thanks to Dango-Chu san)
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* 2008/Jun/03 fix align(). mov(ptr[eax],1) throws ERR_MEM_SIZE_IS_NOT_SPECIFIED.
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* 2008/Jun/02 support memory interface allocated by user
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* 2008/May/26 fix protect() to avoid invalid setting(thanks to shinichiro_h san)
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* 2008/Apr/30 add cmpxchg16b, cdqe
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* 2008/Apr/29 support x64
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* 2008/Apr/14 code refactoring
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* 2008/Mar/12 add bsr/bsf
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* 2008/Feb/14 fix output of sub eax, 1234 (thanks to Robert)
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* 2007/Nov/5 support lock, xadd, xchg
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* 2007/Nov/2 support SSSE3/SSE4 (thanks to Dango-Chu san)
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* 2007/Feb/4 fix the bug that exception doesn't occur under the condition which the offset of jmp mnemonic without T_NEAR is over 127.
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* 2007/Jan/21 fix the bug to create address like [disp] select smaller representation for mov (eax|ax|al, [disp])
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* 2007/Jan/4 first version
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Author
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-------------
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MITSUNARI Shigeo(herumi@nifty.com)
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