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/* $Id: assyntax.h,v 1.1 2003-03-13 12:11:48 giacomo Exp $ */

#ifndef __ASSYNTAX_H__

#define __ASSYNTAX_H__

/*

 * Copyright 1992 Vrije Universiteit, The Netherlands

 *

 * Permission to use, copy, modify, and distribute this software and its

 * documentation for any purpose and without fee is hereby granted, provided

 * that the above copyright notice appear in all copies and that both that

 * copyright notice and this permission notice appear in supporting

 * documentation, and that the name of the Vrije Universiteit not be used in

 * advertising or publicity pertaining to distribution of the software without

 * specific, written prior permission.  The Vrije Universiteit makes no

 * representations about the suitability of this software for any purpose.

 * It is provided "as is" without express or implied warranty.

 *

 * The Vrije Universiteit DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS

 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,

 * IN NO EVENT SHALL The Vrije Universiteit BE LIABLE FOR ANY SPECIAL,

 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM

 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE

 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR

 * PERFORMANCE OF THIS SOFTWARE.

 */

/*

 * assyntax.h

 *

 * Select the syntax appropriate to the 386 assembler being used

 * To add support for more assemblers add more columns to the CHOICE

 * macro.  Note that register names must also have uppercase names

 * to avoid macro recursion. e.g., #define ah %ah recurses!

 *

 * NB 1.  Some of the macros for certain assemblers imply that the code is to

 *        run in protected mode!!  Caveat emptor.

 *

 * NB 2.  486 specific instructions are not included.  This is to discourage

 *        their accidental use in code that is intended to run on 386 and 486

 *        systems.

 *

 * Supported assemblers:

 *

 * (a) AT&T SysVr4 as(1):       define ATT_ASSEMBLER

 * (b) GNU Assembler gas:       define GNU_ASSEMBLER (default)

 * (c) Amsterdam Compiler kit:  define ACK_ASSEMBLER

 * (d) The Netwide Assembler:   define NASM_ASSEMBLER

 * (e) Microsoft Assembler:     define MASM_ASSEMBLER (UNTESTED!)

 *

 * The following naming conventions have been used to identify the various

 * data types:

 *              _SR = segment register version

 *      Integer:

 *              _Q = quadword   = 64 bits

 *              _L = long       = 32 bits

 *              _W = short      = 16 bits

 *              _B = byte       =  8 bits

 *      Floating-point:

 *              _X = m80real    = 80 bits

 *              _D = double     = 64 bits

 *              _S = single     = 32 bits

 *

 * Author: Gregory J. Sharp, Sept 1992

 *         Vrije Universiteit, Amsterdam, The Netherlands

 *

 *         [support for Intel syntax added by Josh Vanderhoof, 1999]

 */

#if !(defined(NASM_ASSEMBLER) || defined(MASM_ASSEMBLER))

/* Default to ATT_ASSEMBLER when SVR4 or SYSV are defined */

#if (defined(SVR4) || defined(SYSV)) && !defined(GNU_ASSEMBLER)

#define ATT_ASSEMBLER

#endif

#if !defined(ATT_ASSEMBLER) && !defined(GNU_ASSEMBLER) && !defined(ACK_ASSEMBLER)

#define GNU_ASSEMBLER

#endif

#if (defined(__STDC__) && !defined(UNIXCPP)) || (defined (sun) && defined (i386) && defined (SVR4) && defined (__STDC__) && !defined (__GNUC__))

#define CONCAT(x, y)    x ## y

#else

#define CONCAT(x, y)    x/**/y

#endif

#ifdef ACK_ASSEMBLER

/* Assume we write code for 32-bit protected mode! */

/* Redefine register names for GAS & AT&T assemblers */

#define AL              al

#define AH              ah

#define AX              ax

#define EAX             ax

#define BL              bl

#define BH              bh

#define BX              bx

#define EBX             bx

#define CL              cl

#define CH              ch

#define CX              cx

#define ECX             cx

#define DL              dl

#define DH              dh

#define DX              dx

#define EDX             dx

#define BP              bp

#define EBP             bp

#define SI              si

#define ESI             si

#define DI              di

#define EDI             di

#define SP              sp

#define ESP             sp

#define CS              cs

#define SS              ss

#define DS              ds

#define ES              es

#define FS              fs

#define GS              gs

/* Control Registers */

#define CR0             cr0

#define CR1             cr1

#define CR2             cr2

#define CR3             cr3

/* Debug Registers */

#define DR0             dr0

#define DR1             dr1

#define DR2             dr2

#define DR3             dr3

#define DR4             dr4

#define DR5             dr5

#define DR6             dr6

#define DR7             dr7

/* Floating-point Stack */

#define ST              st

#define AS_BEGIN        .sect .text; .sect .rom; .sect .data; .sect .bss; .sect .text

#define _WTOG           o16     /* word toggle for _W instructions */

#define _LTOG                   /* long toggle for _L instructions */

#define ADDR_TOGGLE     a16

#define OPSZ_TOGGLE     o16

#define USE16           .use16

#define USE32           .use32

#define CHOICE(a,b,c)   c

#else /* AT&T or GAS */

/* Redefine register names for GAS & AT&T assemblers */

#define AL              %al

#define AH              %ah

#define AX              %ax

#define EAX             %eax

#define BL              %bl

#define BH              %bh

#define BX              %bx

#define EBX             %ebx

#define CL              %cl

#define CH              %ch

#define CX              %cx

#define ECX             %ecx

#define DL              %dl

#define DH              %dh

#define DX              %dx

#define EDX             %edx

#define BP              %bp

#define EBP             %ebp

#define SI              %si

#define ESI             %esi

#define DI              %di

#define EDI             %edi

#define SP              %sp

#define ESP             %esp

#define CS              %cs

#define SS              %ss

#define DS              %ds

#define ES              %es

#define FS              %fs

#define GS              %gs

/* Control Registers */

#define CR0             %cr0

#define CR1             %cr1

#define CR2             %cr2

#define CR3             %cr3

/* Debug Registers */

#define DR0             %db0

#define DR1             %db1

#define DR2             %db2

#define DR3             %db3

#define DR4             %db4

#define DR5             %db5

#define DR6             %db6

#define DR7             %db7

/* Floating-point Stack */

#define _STX0           %st(0)

#define _STX1           %st(1)

#define _STX2           %st(2)

#define _STX3           %st(3)

#define _STX4           %st(4)

#define _STX5           %st(5)

#define _STX6           %st(6)

#define _STX7           %st(7)

#define ST(x)           CONCAT(_STX,x)

#ifdef GNU_ASSEMBLER

#define ST0             %st(0)

#else

#define ST0             %st

#endif

/* MMX Registers */

#define MM0             %mm0

#define MM1             %mm1

#define MM2             %mm2

#define MM3             %mm3

#define MM4             %mm4

#define MM5             %mm5

#define MM6             %mm6

#define MM7             %mm7

/* SSE Registers */

#define XMM0            %xmm0

#define XMM1            %xmm1

#define XMM2            %xmm2

#define XMM3            %xmm3

#define XMM4            %xmm4

#define XMM5            %xmm5

#define XMM6            %xmm6

#define XMM7            %xmm7

#define AS_BEGIN

#define USE16

#define USE32

#ifdef GNU_ASSEMBLER

#define ADDR_TOGGLE     aword

#define OPSZ_TOGGLE     word

#define CHOICE(a,b,c)   b

#else

/*

 * AT&T ASSEMBLER SYNTAX

 * *********************

 */

#define CHOICE(a,b,c)   a

#define ADDR_TOGGLE     addr16

#define OPSZ_TOGGLE     data16

#endif /* GNU_ASSEMBLER */

#endif /* ACK_ASSEMBLER */

#if defined(__QNX__) || defined(Lynx) || (defined(SYSV) || defined(SVR4)) && !defined(ACK_ASSEMBLER) || defined(__ELF__) || defined(__GNU__) || defined(__GNUC__) && !defined(DJGPP)

#define GLNAME(a)       a

#else

#define GLNAME(a)       CONCAT(_,a)

#endif

        /****************************************/

        /*                                      */

        /*      Select the various choices      */

        /*                                      */

        /****************************************/

/* Redefine assembler directives */

/*********************************/

#define GLOBL           CHOICE(.globl, .globl, .extern)

#define GLOBAL          GLOBL

#define EXTERN          GLOBL

/*

#define ALIGNTEXT32     CHOICE(.align 32, .align ARG2(5,0x90), .align 32)

*/

#define ALIGNTEXT32     CHOICE(.align 32, .balign 32, .align 32)

#define ALIGNTEXT16     CHOICE(.align 16, .balign 16, .align 16)

#define ALIGNTEXT8      CHOICE(.align 8, .balign 8, .align 8)

#define ALIGNTEXT4      CHOICE(.align 4, .balign 4, .align 4)

#define ALIGNTEXT2      CHOICE(.align 2, .balign 2, .align 2)

/* ALIGNTEXT4ifNOP is the same as ALIGNTEXT4, but only if the space is

 * guaranteed to be filled with NOPs.  Otherwise it does nothing.

 */

#define ALIGNTEXT32ifNOP        CHOICE(.align 32, .balign ARG2(32,0x90), /*can't do it*/)

#define ALIGNTEXT16ifNOP        CHOICE(.align 16, .balign ARG2(16,0x90), /*can't do it*/)

#define ALIGNTEXT8ifNOP CHOICE(.align 8, .balign ARG2(8,0x90), /*can't do it*/)

#define ALIGNTEXT4ifNOP CHOICE(.align 4, .balign ARG2(4,0x90), /*can't do it*/)

#define ALIGNDATA32     CHOICE(.align 32, .balign ARG2(32,0x0), .align 32)

#define ALIGNDATA16     CHOICE(.align 16, .balign ARG2(16,0x0), .align 16)

#define ALIGNDATA8      CHOICE(.align 8, .balign ARG2(8,0x0), .align 8)

#define ALIGNDATA4      CHOICE(.align 4, .balign ARG2(4,0x0), .align 4)

#define ALIGNDATA2      CHOICE(.align 2, .balign ARG2(2,0x0), .align 2)

#define FILE(s)         CHOICE(.file s, .file s, .file s)

#define STRING(s)       CHOICE(.string s, .asciz s, .asciz s)

#define D_LONG          CHOICE(.long, .long, .data4)

#define D_WORD          CHOICE(.value, .short, .data2)

#define D_BYTE          CHOICE(.byte, .byte, .data1)

#define SPACE           CHOICE(.comm, .space, .space)

#define COMM            CHOICE(.comm, .comm, .comm)

#define SEG_DATA        CHOICE(.data, .data, .sect .data)

#define SEG_TEXT        CHOICE(.text, .text, .sect .text)

#define SEG_BSS         CHOICE(.bss, .bss, .sect .bss)

#ifdef GNU_ASSEMBLER

#define D_SPACE(n)      . = . + n

#else

#define D_SPACE(n)      .space n

#endif

/* Addressing Modes */

/* Immediate Mode */

#define ADDR(a)         CHOICE(CONCAT($,a), CONCAT($,a), a)

#define CONST(a)        CHOICE(CONCAT($,a), CONCAT($,a), a)

/* Indirect Mode */

#define CONTENT(a)      CHOICE(a, a, (a))        /* take contents of variable */

#define REGIND(a)       CHOICE((a), (a), (a))    /* Register a indirect */

/* Register b indirect plus displacement a */

#define REGOFF(a, b)    CHOICE(a(b), a(b), a(b))

/* Reg indirect Base + Index + Displacement  - this is mainly for 16-bit mode

 * which has no scaling

 */

#define REGBID(b,i,d)   CHOICE(d(b,i), d(b,i), d(b)(i))

/* Reg indirect Base + (Index * Scale) */

#define REGBIS(b,i,s)   CHOICE((b,i,s), (b,i,s), (b)(i*s))

/* Reg indirect Base + (Index * Scale) + Displacement */

#define REGBISD(b,i,s,d) CHOICE(d(b,i,s), d(b,i,s), d(b)(i*s))

/* Displaced Scaled Index: */

#define REGDIS(d,i,s)   CHOICE(d(,i,s), d(,i,s), d(i * s))

/* Indexed Base: */

#define REGBI(b,i)      CHOICE((b,i), (b,i), (b)(i))

/* Displaced Base: */

#define REGDB(d,b)      CHOICE(d(b), d(b), d(b))

/* Variable indirect: */

#define VARINDIRECT(var) CHOICE(*var, *var, (var))

/* Use register contents as jump/call target: */

#define CODEPTR(reg)    CHOICE(*reg, *reg, reg)

/* For expressions requiring bracketing

 * eg. (CRT0_PM | CRT_EM)

 */

#define EXPR(a)         CHOICE([a], (a), [a])

#define ENOT(a)         CHOICE(0!a, ~a, ~a)

#define EMUL(a,b)       CHOICE(a\*b, a*b, a*b)

#define EDIV(a,b)       CHOICE(a\/b, a/b, a/b)

/*

 * We have to beat the problem of commas within arguments to choice.

 * eg. choice (add a,b, add b,a) will get argument mismatch.  Luckily ANSI

 * and other known cpp definitions evaluate arguments before substitution

 * so the following works.

 */

#define ARG2(a, b)      a,b

#define ARG3(a,b,c)     a,b,c

/* Redefine assembler commands */

#define AAA             CHOICE(aaa, aaa, aaa)

#define AAD             CHOICE(aad, aad, aad)

#define AAM             CHOICE(aam, aam, aam)

#define AAS             CHOICE(aas, aas, aas)

#define ADC_L(a, b)     CHOICE(adcl ARG2(a,b), adcl ARG2(a,b), _LTOG adc ARG2(b,a))

#define ADC_W(a, b)     CHOICE(adcw ARG2(a,b), adcw ARG2(a,b), _WTOG adc ARG2(b,a))

#define ADC_B(a, b)     CHOICE(adcb ARG2(a,b), adcb ARG2(a,b), adcb ARG2(b,a))

#define ADD_L(a, b)     CHOICE(addl ARG2(a,b), addl ARG2(a,b), _LTOG add ARG2(b,a))

#define ADD_W(a, b)     CHOICE(addw ARG2(a,b), addw ARG2(a,b), _WTOG add ARG2(b,a))

#define ADD_B(a, b)     CHOICE(addb ARG2(a,b), addb ARG2(a,b), addb ARG2(b,a))

#define AND_L(a, b)     CHOICE(andl ARG2(a,b), andl ARG2(a,b), _LTOG and ARG2(b,a))

#define AND_W(a, b)     CHOICE(andw ARG2(a,b), andw ARG2(a,b), _WTOG and ARG2(b,a))

#define AND_B(a, b)     CHOICE(andb ARG2(a,b), andb ARG2(a,b), andb ARG2(b,a))

#define ARPL(a,b)       CHOICE(arpl ARG2(a,b), arpl ARG2(a,b), arpl ARG2(b,a))

#define BOUND_L(a, b)   CHOICE(boundl ARG2(a,b), boundl ARG2(b,a), _LTOG bound ARG2(b,a))

#define BOUND_W(a, b)   CHOICE(boundw ARG2(a,b), boundw ARG2(b,a), _WTOG bound ARG2(b,a))

#define BSF_L(a, b)     CHOICE(bsfl ARG2(a,b), bsfl ARG2(a,b), _LTOG bsf ARG2(b,a))

#define BSF_W(a, b)     CHOICE(bsfw ARG2(a,b), bsfw ARG2(a,b), _WTOG bsf ARG2(b,a))

#define BSR_L(a, b)     CHOICE(bsrl ARG2(a,b), bsrl ARG2(a,b), _LTOG bsr ARG2(b,a))

#define BSR_W(a, b)     CHOICE(bsrw ARG2(a,b), bsrw ARG2(a,b), _WTOG bsr ARG2(b,a))

#define BT_L(a, b)      CHOICE(btl ARG2(a,b), btl ARG2(a,b), _LTOG bt ARG2(b,a))

#define BT_W(a, b)      CHOICE(btw ARG2(a,b), btw ARG2(a,b), _WTOG bt ARG2(b,a))

#define BTC_L(a, b)     CHOICE(btcl ARG2(a,b), btcl ARG2(a,b), _LTOG btc ARG2(b,a))

#define BTC_W(a, b)     CHOICE(btcw ARG2(a,b), btcw ARG2(a,b), _WTOG btc ARG2(b,a))

#define BTR_L(a, b)     CHOICE(btrl ARG2(a,b), btrl ARG2(a,b), _LTOG btr ARG2(b,a))

#define BTR_W(a, b)     CHOICE(btrw ARG2(a,b), btrw ARG2(a,b), _WTOG btr ARG2(b,a))

#define BTS_L(a, b)     CHOICE(btsl ARG2(a,b), btsl ARG2(a,b), _LTOG bts ARG2(b,a))

#define BTS_W(a, b)     CHOICE(btsw ARG2(a,b), btsw ARG2(a,b), _WTOG bts ARG2(b,a))

#define CALL(a)         CHOICE(call a, call a, call a)

#define CALLF(s,a)      CHOICE(lcall ARG2(s,a), lcall ARG2(s,a), callf s:a)

#define CBW             CHOICE(cbtw, cbw, cbw)

#define CWDE            CHOICE(cwtd, cwde, cwde)

#define CLC             CHOICE(clc, clc, clc)

#define CLD             CHOICE(cld, cld, cld)

#define CLI             CHOICE(cli, cli, cli)

#define CLTS            CHOICE(clts, clts, clts)

#define CMC             CHOICE(cmc, cmc, cmc)

#define CMP_L(a, b)     CHOICE(cmpl ARG2(a,b), cmpl ARG2(a,b), _LTOG cmp ARG2(b,a))

#define CMP_W(a, b)     CHOICE(cmpw ARG2(a,b), cmpw ARG2(a,b), _WTOG cmp ARG2(b,a))

#define CMP_B(a, b)     CHOICE(cmpb ARG2(a,b), cmpb ARG2(a,b), cmpb ARG2(b,a))

#define CMPS_L          CHOICE(cmpsl, cmpsl, _LTOG cmps)

#define CMPS_W          CHOICE(cmpsw, cmpsw, _WTOG cmps)

#define CMPS_B          CHOICE(cmpsb, cmpsb, cmpsb)

#define CWD             CHOICE(cwtl, cwd, cwd)

#define CDQ             CHOICE(cltd, cdq, cdq)

#define DAA             CHOICE(daa, daa, daa)

#define DAS             CHOICE(das, das, das)

#define DEC_L(a)        CHOICE(decl a, decl a, _LTOG dec a)

#define DEC_W(a)        CHOICE(decw a, decw a, _WTOG dec a)

#define DEC_B(a)        CHOICE(decb a, decb a, decb a)

#define DIV_L(a)        CHOICE(divl a, divl a, div a)

#define DIV_W(a)        CHOICE(divw a, divw a, div a)

#define DIV_B(a)        CHOICE(divb a, divb a, divb a)

#define ENTER(a,b)      CHOICE(enter ARG2(a,b), enter ARG2(a,b), enter ARG2(b,a))

#define HLT             CHOICE(hlt, hlt, hlt)

#define IDIV_L(a)       CHOICE(idivl a, idivl a, _LTOG idiv a)

#define IDIV_W(a)       CHOICE(idivw a, idivw a, _WTOG idiv a)

#define IDIV_B(a)       CHOICE(idivb a, idivb a, idivb a)

/* More forms than this for imul!! */

#define IMUL_L(a, b)    CHOICE(imull ARG2(a,b), imull ARG2(a,b), _LTOG imul ARG2(b,a))

#define IMUL_W(a, b)    CHOICE(imulw ARG2(a,b), imulw ARG2(a,b), _WTOG imul ARG2(b,a))

#define IMUL_B(a)       CHOICE(imulb a, imulb a, imulb a)

#define IN_L            CHOICE(inl (DX), inl ARG2(DX,EAX), _LTOG in DX)

#define IN_W            CHOICE(inw (DX), inw ARG2(DX,AX), _WTOG in DX)

#define IN_B            CHOICE(inb (DX), inb ARG2(DX,AL), inb DX)

/* Please AS code writer: use the following ONLY, if you refer to ports<256

 * directly, but not in IN1_W(DX), for instance, even if IN1_ looks nicer

 */

#if defined (sun)

#define IN1_L(a)        CHOICE(inl (a), inl ARG2(a,EAX), _LTOG in a)

#define IN1_W(a)        CHOICE(inw (a), inw ARG2(a,AX), _WTOG in a)

#define IN1_B(a)        CHOICE(inb (a), inb ARG2(a,AL), inb a)

#else

#define IN1_L(a)        CHOICE(inl a, inl ARG2(a,EAX), _LTOG in a)

#define IN1_W(a)        CHOICE(inw a, inw ARG2(a,AX), _WTOG in a)

#define IN1_B(a)        CHOICE(inb a, inb ARG2(a,AL), inb a)

#endif

#define INC_L(a)        CHOICE(incl a, incl a, _LTOG inc a)

#define INC_W(a)        CHOICE(incw a, incw a, _WTOG inc a)

#define INC_B(a)        CHOICE(incb a, incb a, incb a)

#define INS_L           CHOICE(insl, insl, _LTOG ins)

#define INS_W           CHOICE(insw, insw, _WTOG ins)

#define INS_B           CHOICE(insb, insb, insb)

#define INT(a)          CHOICE(int a, int a, int a)

#define INT3            CHOICE(int CONST(3), int3, int CONST(3))

#define INTO            CHOICE(into, into, into)

#define IRET            CHOICE(iret, iret, iret)

#define IRETD           CHOICE(iret, iret, iretd)

#define JA(a)           CHOICE(ja a, ja a, ja a)

#define JAE(a)          CHOICE(jae a, jae a, jae a)

#define JB(a)           CHOICE(jb a, jb a, jb a)

#define JBE(a)          CHOICE(jbe a, jbe a, jbe a)

#define JC(a)           CHOICE(jc a, jc a, jc a)

#define JE(a)           CHOICE(je a, je a, je a)

#define JG(a)           CHOICE(jg a, jg a, jg a)

#define JGE(a)          CHOICE(jge a, jge a, jge a)

#define JL(a)           CHOICE(jl a, jl a, jl a)

#define JLE(a)          CHOICE(jle a, jle a, jle a)

#define JNA(a)          CHOICE(jna a, jna a, jna a)

#define JNAE(a)         CHOICE(jnae a, jnae a, jnae a)

#define JNB(a)          CHOICE(jnb a, jnb a, jnb a)

#define JNBE(a)         CHOICE(jnbe a, jnbe a, jnbe a)

#define JNC(a)          CHOICE(jnc a, jnc a, jnc a)

#define JNE(a)          CHOICE(jne a, jne a, jne a)

#define JNG(a)          CHOICE(jng a, jng a, jng a)

#define JNGE(a)         CHOICE(jnge a, jnge a, jnge a)

#define JNL(a)          CHOICE(jnl a, jnl a, jnl a)

#define JNLE(a)         CHOICE(jnle a, jnle a, jnle a)

#define JNO(a)          CHOICE(jno a, jno a, jno a)

#define JNP(a)          CHOICE(jnp a, jnp a, jnp a)

#define JNS(a)          CHOICE(jns a, jns a, jns a)

#define JNZ(a)          CHOICE(jnz a, jnz a, jnz a)

#define JO(a)           CHOICE(jo a, jo a, jo a)

#define JP(a)           CHOICE(jp a, jp a, jp a)

#define JPE(a)          CHOICE(jpe a, jpe a, jpe a)

#define JPO(a)          CHOICE(jpo a, jpo a, jpo a)

#define JS(a)           CHOICE(js a, js a, js a)

#define JZ(a)           CHOICE(jz a, jz a, jz a)

#define JMP(a)          CHOICE(jmp a, jmp a, jmp a)

#define JMPF(s,a)       CHOICE(ljmp ARG2(s,a), ljmp ARG2(s,a), jmpf s:a)

#define LAHF            CHOICE(lahf, lahf, lahf)

#if !defined(_REAL_MODE) && !defined(_V86_MODE)

#define LAR(a, b)       CHOICE(lar ARG2(a, b), lar ARG2(a, b), lar ARG2(b, a))

#endif

#define LEA_L(a, b)     CHOICE(leal ARG2(a,b), leal ARG2(a,b), _LTOG lea ARG2(b,a))

#define LEA_W(a, b)     CHOICE(leaw ARG2(a,b), leaw ARG2(a,b), _WTOG lea ARG2(b,a))

#define LEAVE           CHOICE(leave, leave, leave)

#define LGDT(a)         CHOICE(lgdt a, lgdt a, lgdt a)

#define LIDT(a)         CHOICE(lidt a, lidt a, lidt a)

#define LDS(a, b)       CHOICE(ldsl ARG2(a,b), lds ARG2(a,b), lds ARG2(b,a))

#define LES(a, b)       CHOICE(lesl ARG2(a,b), les ARG2(a,b), les ARG2(b,a))

#define LFS(a, b)       CHOICE(lfsl ARG2(a,b), lfs ARG2(a,b), lfs ARG2(b,a))

#define LGS(a, b)       CHOICE(lgsl ARG2(a,b), lgs ARG2(a,b), lgs ARG2(b,a))

#define LSS(a, b)       CHOICE(lssl ARG2(a,b), lss ARG2(a,b), lss ARG2(b,a))

#define LLDT(a)         CHOICE(lldt a, lldt a, lldt a)

#define LMSW(a)         CHOICE(lmsw a, lmsw a, lmsw a)

#define LOCK            CHOICE(lock, lock, lock)

#define LODS_L          CHOICE(lodsl, lodsl, _LTOG lods)

#define LODS_W          CHOICE(lodsw, lodsw, _WTOG lods)

#define LODS_B          CHOICE(lodsb, lodsb, lodsb)

#define LOOP(a)         CHOICE(loop a, loop a, loop a)

#define LOOPE(a)        CHOICE(loope a, loope a, loope a)

#define LOOPZ(a)        CHOICE(loopz a, loopz a, loopz a)

#define LOOPNE(a)       CHOICE(loopne a, loopne a, loopne a)

#define LOOPNZ(a)       CHOICE(loopnz a, loopnz a, loopnz a)

#if !defined(_REAL_MODE) && !defined(_V86_MODE)

#define LSL(a, b)       CHOICE(lsl ARG2(a,b), lsl ARG2(a,b), lsl ARG2(b,a))

#endif

#define LTR(a)          CHOICE(ltr a, ltr a, ltr a)

#define MOV_SR(a, b)    CHOICE(movw ARG2(a,b), mov ARG2(a,b), mov ARG2(b,a))

#define MOV_L(a, b)     CHOICE(movl ARG2(a,b), movl ARG2(a,b), _LTOG mov ARG2(b,a))

#define MOV_W(a, b)     CHOICE(movw ARG2(a,b), movw ARG2(a,b), _WTOG mov ARG2(b,a))

#define MOV_B(a, b)     CHOICE(movb ARG2(a,b), movb ARG2(a,b), movb ARG2(b,a))

#define MOVS_L          CHOICE(movsl, movsl, _LTOG movs)

#define MOVS_W          CHOICE(movsw, movsw, _WTOG movs)

#define MOVS_B          CHOICE(movsb, movsb, movsb)

#define MOVSX_BL(a, b)  CHOICE(movsbl ARG2(a,b), movsbl ARG2(a,b), movsx ARG2(b,a))

#define MOVSX_BW(a, b)  CHOICE(movsbw ARG2(a,b), movsbw ARG2(a,b), movsx ARG2(b,a))

#define MOVSX_WL(a, b)  CHOICE(movswl ARG2(a,b), movswl ARG2(a,b), movsx ARG2(b,a))

#define MOVZX_BL(a, b)  CHOICE(movzbl ARG2(a,b), movzbl ARG2(a,b), movzx ARG2(b,a))

#define MOVZX_BW(a, b)  CHOICE(movzbw ARG2(a,b), movzbw ARG2(a,b), movzx ARG2(b,a))

#define MOVZX_WL(a, b)  CHOICE(movzwl ARG2(a,b), movzwl ARG2(a,b), movzx ARG2(b,a))

#define MUL_L(a)        CHOICE(mull a, mull a, _LTOG mul a)

#define MUL_W(a)        CHOICE(mulw a, mulw a, _WTOG mul a)

#define MUL_B(a)        CHOICE(mulb a, mulb a, mulb a)

#define NEG_L(a)        CHOICE(negl a, negl a, _LTOG neg a)

#define NEG_W(a)        CHOICE(negw a, negw a, _WTOG neg a)

#define NEG_B(a)        CHOICE(negb a, negb a, negb a)

#define NOP             CHOICE(nop, nop, nop)

#define NOT_L(a)        CHOICE(notl a, notl a, _LTOG not a)

#define NOT_W(a)        CHOICE(notw a, notw a, _WTOG not a)

#define NOT_B(a)        CHOICE(notb a, notb a, notb a)

#define OR_L(a,b)       CHOICE(orl ARG2(a,b), orl ARG2(a,b), _LTOG or ARG2(b,a))

#define OR_W(a,b)       CHOICE(orw ARG2(a,b), orw ARG2(a,b), _WTOG or ARG2(b,a))

#define OR_B(a,b)       CHOICE(orb ARG2(a,b), orb ARG2(a,b), orb ARG2(b,a))

#define OUT_L           CHOICE(outl (DX), outl ARG2(EAX,DX), _LTOG out DX)

#define OUT_W           CHOICE(outw (DX), outw ARG2(AX,DX), _WTOG out DX)

#define OUT_B           CHOICE(outb (DX), outb ARG2(AL,DX), outb DX)

/* Please AS code writer: use the following ONLY, if you refer to ports<256

 * directly, but not in OUT1_W(DX), for instance, even if OUT1_ looks nicer

 */

#define OUT1_L(a)       CHOICE(outl (a), outl ARG2(EAX,a), _LTOG out a)

#define OUT1_W(a)       CHOICE(outw (a), outw ARG2(AX,a), _WTOG out a)

#define OUT1_B(a)       CHOICE(outb (a), outb ARG2(AL,a), outb a)

#define OUTS_L          CHOICE(outsl, outsl, _LTOG outs)

#define OUTS_W          CHOICE(outsw, outsw, _WTOG outs)

#define OUTS_B          CHOICE(outsb, outsb, outsb)

#define POP_SR(a)       CHOICE(pop a, pop a, pop a)

#define POP_L(a)        CHOICE(popl a, popl a, _LTOG pop a)

#define POP_W(a)        CHOICE(popw a, popw a, _WTOG pop a)

#define POPA_L          CHOICE(popal, popal, _LTOG popa)

#define POPA_W          CHOICE(popaw, popaw, _WTOG popa)

#define POPF_L          CHOICE(popfl, popfl, _LTOG popf)

#define POPF_W          CHOICE(popfw, popfw, _WTOG popf)

#define PUSH_SR(a)      CHOICE(push a, push a, push a)

#define PUSH_L(a)       CHOICE(pushl a, pushl a, _LTOG push a)

#define PUSH_W(a)       CHOICE(pushw a, pushw a, _WTOG push a)

#define PUSH_B(a)       CHOICE(push a, pushb a, push a)

#define PUSHA_L         CHOICE(pushal, pushal, _LTOG pusha)

#define PUSHA_W         CHOICE(pushaw, pushaw, _WTOG pusha)

#define PUSHF_L         CHOICE(pushfl, pushfl, _LTOG pushf)

#define PUSHF_W         CHOICE(pushfw, pushfw, _WTOG pushf)

#define RCL_L(a, b)     CHOICE(rcll ARG2(a,b), rcll ARG2(a,b), _LTOG rcl ARG2(b,a))

#define RCL_W(a, b)     CHOICE(rclw ARG2(a,b), rclw ARG2(a,b), _WTOG rcl ARG2(b,a))

#define RCL_B(a, b)     CHOICE(rclb ARG2(a,b), rclb ARG2(a,b), rclb ARG2(b,a))

#define RCR_L(a, b)     CHOICE(rcrl ARG2(a,b), rcrl ARG2(a,b), _LTOG rcr ARG2(b,a))

#define RCR_W(a, b)     CHOICE(rcrw ARG2(a,b), rcrw ARG2(a,b), _WTOG rcr ARG2(b,a))

#define RCR_B(a, b)     CHOICE(rcrb ARG2(a,b), rcrb ARG2(a,b), rcrb ARG2(b,a))

#define ROL_L(a, b)     CHOICE(roll ARG2(a,b), roll ARG2(a,b), _LTOG rol ARG2(b,a))

#define ROL_W(a, b)     CHOICE(rolw ARG2(a,b), rolw ARG2(a,b), _WTOG rol ARG2(b,a))

#define ROL_B(a, b)     CHOICE(rolb ARG2(a,b), rolb ARG2(a,b), rolb ARG2(b,a))

#define ROR_L(a, b)     CHOICE(rorl ARG2(a,b), rorl ARG2(a,b), _LTOG ror ARG2(b,a))

#define ROR_W(a, b)     CHOICE(rorw ARG2(a,b), rorw ARG2(a,b), _WTOG ror ARG2(b,a))

#define ROR_B(a, b)     CHOICE(rorb ARG2(a,b), rorb ARG2(a,b), rorb ARG2(b,a))

#define REP             CHOICE(rep ;, rep ;, repe)

#define REPE            CHOICE(repz ;, repe ;, repe)

#define REPNE           CHOICE(repnz ;, repne ;, repne)

#define REPNZ           REPNE

#define REPZ            REPE

#define RET             CHOICE(ret, ret, ret)

#define SAHF            CHOICE(sahf, sahf, sahf)

#define SAL_L(a, b)     CHOICE(sall ARG2(a,b), sall ARG2(a,b), _LTOG sal ARG2(b,a))

#define SAL_W(a, b)     CHOICE(salw ARG2(a,b), salw ARG2(a,b), _WTOG sal ARG2(b,a))

#define SAL_B(a, b)     CHOICE(salb ARG2(a,b), salb ARG2(a,b), salb ARG2(b,a))

#define SAR_L(a, b)     CHOICE(sarl ARG2(a,b), sarl ARG2(a,b), _LTOG sar ARG2(b,a))

#define SAR_W(a, b)     CHOICE(sarw ARG2(a,b), sarw ARG2(a,b), _WTOG sar ARG2(b,a))

#define SAR_B(a, b)     CHOICE(sarb ARG2(a,b), sarb ARG2(a,b), sarb ARG2(b,a))

#define SBB_L(a, b)     CHOICE(sbbl ARG2(a,b), sbbl ARG2(a,b), _LTOG sbb ARG2(b,a))

#define SBB_W(a, b)     CHOICE(sbbw ARG2(a,b), sbbw ARG2(a,b), _WTOG sbb ARG2(b,a))

#define SBB_B(a, b)     CHOICE(sbbb ARG2(a,b), sbbb ARG2(a,b), sbbb ARG2(b,a))

#define SCAS_L          CHOICE(scasl, scasl, _LTOG scas)

#define SCAS_W          CHOICE(scasw, scasw, _WTOG scas)

#define SCAS_B          CHOICE(scasb, scasb, scasb)

#define SETA(a)         CHOICE(seta a, seta a, seta a)

#define SETAE(a)        CHOICE(setae a, setae a, setae a)

#define SETB(a)         CHOICE(setb a, setb a, setb a)

#define SETBE(a)        CHOICE(setbe a, setbe a, setbe a)

#define SETC(a)         CHOICE(setc a, setb a, setb a)

#define SETE(a)         CHOICE(sete a, sete a, sete a)

#define SETG(a)         CHOICE(setg a, setg a, setg a)

#define SETGE(a)        CHOICE(setge a, setge a, setge a)

#define SETL(a)         CHOICE(setl a, setl a, setl a)

#define SETLE(a)        CHOICE(setle a, setle a, setle a)

#define SETNA(a)        CHOICE(setna a, setna a, setna a)

#define SETNAE(a)       CHOICE(setnae a, setnae a, setnae a)

#define SETNB(a)        CHOICE(setnb a, setnb a, setnb a)

#define SETNBE(a)       CHOICE(setnbe a, setnbe a, setnbe a)

#define SETNC(a)        CHOICE(setnc a, setnb a, setnb a)

#define SETNE(a)        CHOICE(setne a, setne a, setne a)

#define SETNG(a)        CHOICE(setng a, setng a, setng a)

#define SETNGE(a)       CHOICE(setnge a, setnge a, setnge a)

#define SETNL(a)        CHOICE(setnl a, setnl a, setnl a)

#define SETNLE(a)       CHOICE(setnle a, setnle a, setnle a)

#define SETNO(a)        CHOICE(setno a, setno a, setno a)

#define SETNP(a)        CHOICE(setnp a, setnp a, setnp a)

#define SETNS(a)        CHOICE(setns a, setns a, setna a)

#define SETNZ(a)        CHOICE(setnz a, setnz a, setnz a)

#define SETO(a)         CHOICE(seto a, seto a, seto a)

#define SETP(a)         CHOICE(setp a, setp a, setp a)

#define SETPE(a)        CHOICE(setpe a, setpe a, setpe a)

#define SETPO(a)        CHOICE(setpo a, setpo a, setpo a)

#define SETS(a)         CHOICE(sets a, sets a, seta a)

#define SETZ(a)         CHOICE(setz a, setz a, setz a)

#define SGDT(a)         CHOICE(sgdt a, sgdt a, sgdt a)

#define SIDT(a)         CHOICE(sidt a, sidt a, sidt a)

#define SHL_L(a, b)     CHOICE(shll ARG2(a,b), shll ARG2(a,b), _LTOG shl ARG2(b,a))

#define SHL_W(a, b)     CHOICE(shlw ARG2(a,b), shlw ARG2(a,b), _WTOG shl ARG2(b,a))

#define SHL_B(a, b)     CHOICE(shlb ARG2(a,b), shlb ARG2(a,b), shlb ARG2(b,a))

#define SHLD_L(a,b,c)   CHOICE(shldl ARG3(a,b,c), shldl ARG3(a,b,c), _LTOG shld ARG3(c,b,a))

#define SHLD2_L(a,b)    CHOICE(shldl ARG2(a,b), shldl ARG3(CL,a,b), _LTOG shld ARG3(b,a,CL))

#define SHLD_W(a,b,c)   CHOICE(shldw ARG3(a,b,c), shldw ARG3(a,b,c), _WTOG shld ARG3(c,b,a))

#define SHLD2_W(a,b)    CHOICE(shldw ARG2(a,b), shldw ARG3(CL,a,b), _WTOG shld ARG3(b,a,CL))

#define SHR_L(a, b)     CHOICE(shrl ARG2(a,b), shrl ARG2(a,b), _LTOG shr ARG2(b,a))

#define SHR_W(a, b)     CHOICE(shrw ARG2(a,b), shrw ARG2(a,b), _WTOG shr ARG2(b,a))

#define SHR_B(a, b)     CHOICE(shrb ARG2(a,b), shrb ARG2(a,b), shrb ARG2(b,a))

#define SHRD_L(a,b,c)   CHOICE(shrdl ARG3(a,b,c), shrdl ARG3(a,b,c), _LTOG shrd ARG3(c,b,a))

#define SHRD2_L(a,b)    CHOICE(shrdl ARG2(a,b), shrdl ARG3(CL,a,b), _LTOG shrd ARG3(b,a,CL))

#define SHRD_W(a,b,c)   CHOICE(shrdw ARG3(a,b,c), shrdw ARG3(a,b,c), _WTOG shrd ARG3(c,b,a))

#define SHRD2_W(a,b)    CHOICE(shrdw ARG2(a,b), shrdw ARG3(CL,a,b), _WTOG shrd ARG3(b,a,CL))

#define SLDT(a)         CHOICE(sldt a, sldt a, sldt a)

#define SMSW(a)         CHOICE(smsw a, smsw a, smsw a)

#define STC             CHOICE(stc, stc, stc)

#define STD             CHOICE(std, std, std)

#define STI             CHOICE(sti, sti, sti)

#define STOS_L          CHOICE(stosl, stosl, _LTOG stos)

#define STOS_W          CHOICE(stosw, stosw, _WTOG stos)

#define STOS_B          CHOICE(stosb, stosb, stosb)

#define STR(a)          CHOICE(str a, str a, str a)

#define SUB_L(a, b)     CHOICE(subl ARG2(a,b), subl ARG2(a,b), _LTOG sub ARG2(b,a))

#define SUB_W(a, b)     CHOICE(subw ARG2(a,b), subw ARG2(a,b), _WTOG sub ARG2(b,a))

#define SUB_B(a, b)     CHOICE(subb ARG2(a,b), subb ARG2(a,b), subb ARG2(b,a))

#define TEST_L(a, b)    CHOICE(testl ARG2(a,b), testl ARG2(a,b), _LTOG test ARG2(b,a))

#define TEST_W(a, b)    CHOICE(testw ARG2(a,b), testw ARG2(a,b), _WTOG test ARG2(b,a))

#define TEST_B(a, b)    CHOICE(testb ARG2(a,b), testb ARG2(a,b), testb ARG2(b,a))

#define VERR(a)         CHOICE(verr a, verr a, verr a)

#define VERW(a)         CHOICE(verw a, verw a, verw a)

#define WAIT            CHOICE(wait, wait, wait)

#define XCHG_L(a, b)    CHOICE(xchgl ARG2(a,b), xchgl ARG2(a,b), _LTOG xchg ARG2(b,a))

#define XCHG_W(a, b)    CHOICE(xchgw ARG2(a,b), xchgw ARG2(a,b), _WTOG xchg ARG2(b,a))

#define XCHG_B(a, b)    CHOICE(xchgb ARG2(a,b), xchgb ARG2(a,b), xchgb ARG2(b,a))

#define XLAT            CHOICE(xlat, xlat, xlat)

#define XOR_L(a, b)     CHOICE(xorl ARG2(a,b), xorl ARG2(a,b), _LTOG xor ARG2(b,a))

#define XOR_W(a, b)     CHOICE(xorw ARG2(a,b), xorw ARG2(a,b), _WTOG xor ARG2(b,a))

#define XOR_B(a, b)     CHOICE(xorb ARG2(a,b), xorb ARG2(a,b), xorb ARG2(b,a))

/* Floating Point Instructions */

#define F2XM1           CHOICE(f2xm1, f2xm1, f2xm1)

#define FABS            CHOICE(fabs, fabs, fabs)

#define FADD_D(a)       CHOICE(faddl a, faddl a, faddd a)

#define FADD_S(a)       CHOICE(fadds a, fadds a, fadds a)

#define FADD2(a, b)     CHOICE(fadd ARG2(a,b), fadd ARG2(a,b), fadd ARG2(b,a))

#define FADDP(a, b)     CHOICE(faddp ARG2(a,b), faddp ARG2(a,b), faddp ARG2(b,a))

#define FIADD_L(a)      CHOICE(fiaddl a, fiaddl a, fiaddl a)

#define FIADD_W(a)      CHOICE(fiadd a, fiadds a, fiadds a)

#define FBLD(a)         CHOICE(fbld a, fbld a, fbld a)

#define FBSTP(a)        CHOICE(fbstp a, fbstp a, fbstp a)

#define FCHS            CHOICE(fchs, fchs, fchs)

#define FCLEX           CHOICE(fclex, wait; fnclex, wait; fclex)

#define FNCLEX          CHOICE(fnclex, fnclex, fclex)

#define FCOM(a)         CHOICE(fcom a, fcom a, fcom a)

#define FCOM_D(a)       CHOICE(fcoml a, fcoml a, fcomd a)

#define FCOM_S(a)       CHOICE(fcoms a, fcoms a, fcoms a)

#define FCOMP(a)        CHOICE(fcomp a, fcomp a, fcomp a)

#define FCOMP_D(a)      CHOICE(fcompl a, fcompl a, fcompd a)

#define FCOMP_S(a)      CHOICE(fcomps a, fcomps a, fcomps a)

#define FCOMPP          CHOICE(fcompp, fcompp, fcompp)

#define FCOS            CHOICE(fcos, fcos, fcos)

#define FDECSTP         CHOICE(fdecstp, fdecstp, fdecstp)

#define FDIV_D(a)       CHOICE(fdivl a, fdivl a, fdivd a)

#define FDIV_S(a)       CHOICE(fdivs a, fdivs a, fdivs a)

#define FDIV2(a, b)     CHOICE(fdiv ARG2(a,b), fdiv ARG2(a,b), fdiv ARG2(b,a))

#define FDIVP(a, b)     CHOICE(fdivp ARG2(a,b), fdivp ARG2(a,b), fdivp ARG2(b,a))

#define FIDIV_L(a)      CHOICE(fidivl a, fidivl a, fidivl a)

#define FIDIV_W(a)      CHOICE(fidiv a, fidivs a, fidivs a)

#define FDIVR_D(a)      CHOICE(fdivrl a, fdivrl a, fdivrd a)

#define FDIVR_S(a)      CHOICE(fdivrs a, fdivrs a, fdivrs a)

#define FDIVR2(a, b)    CHOICE(fdivr ARG2(a,b), fdivr ARG2(a,b), fdivr ARG2(b,a))

#define FDIVRP(a, b)    CHOICE(fdivrp ARG2(a,b), fdivrp ARG2(a,b), fdivrp ARG2(b,a))

#define FIDIVR_L(a)     CHOICE(fidivrl a, fidivrl a, fidivrl a)

#define FIDIVR_W(a)     CHOICE(fidivr a, fidivrs a, fidivrs a)

#define FFREE(a)        CHOICE(ffree a, ffree a, ffree a)

#define FICOM_L(a)      CHOICE(ficoml a, ficoml a, ficoml a)

#define FICOM_W(a)      CHOICE(ficom a, ficoms a, ficoms a)

#define FICOMP_L(a)     CHOICE(ficompl a, ficompl a, ficompl a)

#define FICOMP_W(a)     CHOICE(ficomp a, ficomps a, ficomps a)

#define FILD_Q(a)       CHOICE(fildll a, fildq a, fildq a)

#define FILD_L(a)       CHOICE(fildl a, fildl a, fildl a)

#define FILD_W(a)       CHOICE(fild a, filds a, filds a)

#define FINCSTP         CHOICE(fincstp, fincstp, fincstp)

#define FINIT           CHOICE(finit, wait; fninit, wait; finit)

#define FNINIT          CHOICE(fninit, fninit, finit)

#define FIST_L(a)       CHOICE(fistl a, fistl a, fistl a)

#define FIST_W(a)       CHOICE(fist a, fists a, fists a)

#define FISTP_Q(a)      CHOICE(fistpll a, fistpq a, fistpq a)

#define FISTP_L(a)      CHOICE(fistpl a, fistpl a, fistpl a)

#define FISTP_W(a)      CHOICE(fistp a, fistps a, fistps a)

#define FLD_X(a)        CHOICE(fldt a, fldt a, fldx a) /* 80 bit data type! */

#define FLD_D(a)        CHOICE(fldl a, fldl a, fldd a)

#define FLD_S(a)        CHOICE(flds a, flds a, flds a)

#define FLD1            CHOICE(fld1, fld1, fld1)

#define FLDL2T          CHOICE(fldl2t, fldl2t, fldl2t)

#define FLDL2E          CHOICE(fldl2e, fldl2e, fldl2e)

#define FLDPI           CHOICE(fldpi, fldpi, fldpi)

#define FLDLG2          CHOICE(fldlg2, fldlg2, fldlg2)

#define FLDLN2          CHOICE(fldln2, fldln2, fldln2)

#define FLDZ            CHOICE(fldz, fldz, fldz)

#define FLDCW(a)        CHOICE(fldcw a, fldcw a, fldcw a)

#define FLDENV(a)       CHOICE(fldenv a, fldenv a, fldenv a)

#define FMUL_S(a)       CHOICE(fmuls a, fmuls a, fmuls a)

#define FMUL_D(a)       CHOICE(fmull a, fmull a, fmuld a)

#define FMUL2(a, b)     CHOICE(fmul ARG2(a,b), fmul ARG2(a,b), fmul ARG2(b,a))

#define FMULP(a, b)     CHOICE(fmulp ARG2(a,b), fmulp ARG2(a,b), fmulp ARG2(b,a))

#define FIMUL_L(a)      CHOICE(fimull a, fimull a, fimull a)

#define FIMUL_W(a)      CHOICE(fimul a, fimuls a, fimuls a)

#define FNOP            CHOICE(fnop, fnop, fnop)

#define FPATAN          CHOICE(fpatan, fpatan, fpatan)

#define FPREM           CHOICE(fprem, fprem, fprem)

#define FPREM1          CHOICE(fprem1, fprem1, fprem1)

#define FPTAN           CHOICE(fptan, fptan, fptan)

#define FRNDINT         CHOICE(frndint, frndint, frndint)

#define FRSTOR(a)       CHOICE(frstor a, frstor a, frstor a)

#define FSAVE(a)        CHOICE(fsave a, wait; fnsave a, wait; fsave a)

#define FNSAVE(a)       CHOICE(fnsave a, fnsave a, fsave a)

#define FSCALE          CHOICE(fscale, fscale, fscale)

#define FSIN            CHOICE(fsin, fsin, fsin)

#define FSINCOS         CHOICE(fsincos, fsincos, fsincos)

#define FSQRT           CHOICE(fsqrt, fsqrt, fsqrt)

#define FST_D(a)        CHOICE(fstl a, fstl a, fstd a)

#define FST_S(a)        CHOICE(fsts a, fsts a, fsts a)

#define FSTP_X(a)       CHOICE(fstpt a, fstpt a, fstpx a)

#define FSTP_D(a)       CHOICE(fstpl a, fstpl a, fstpd a)

#define FSTP_S(a)       CHOICE(fstps a, fstps a, fstps a)

#define FSTP(a)         CHOICE(fstp a, fstp a, fstp a)

#define FSTCW(a)        CHOICE(fstcw a, wait; fnstcw a, wait; fstcw a)

#define FNSTCW(a)       CHOICE(fnstcw a, fnstcw a, fstcw a)

#define FSTENV(a)       CHOICE(fstenv a, wait; fnstenv a, fstenv a)

#define FNSTENV(a)      CHOICE(fnstenv a, fnstenv a, fstenv a)

#define FSTSW(a)        CHOICE(fstsw a, wait; fnstsw a, wait; fstsw a)

#define FNSTSW(a)       CHOICE(fnstsw a, fnstsw a, fstsw a)

#define FSUB_S(a)       CHOICE(fsubs a, fsubs a, fsubs a)

#define FSUB_D(a)       CHOICE(fsubl a, fsubl a, fsubd a)

#define FSUB2(a, b)     CHOICE(fsub ARG2(a,b), fsub ARG2(a,b), fsub ARG2(b,a))

#define FSUBP(a, b)     CHOICE(fsubp ARG2(a,b), fsubp ARG2(a,b), fsubp ARG2(b,a))

#define FISUB_L(a)      CHOICE(fisubl a, fisubl a, fisubl a)

#define FISUB_W(a)      CHOICE(fisub a, fisubs a, fisubs a)

#define FSUBR_S(a)      CHOICE(fsubrs a, fsubrs a, fsubrs a)

#define FSUBR_D(a)      CHOICE(fsubrl a, fsubrl a, fsubrd a)

#define FSUBR2(a, b)    CHOICE(fsubr ARG2(a,b), fsubr ARG2(a,b), fsubr ARG2(b,a))

#define FSUBRP(a, b)    CHOICE(fsubrp ARG2(a,b), fsubrp ARG2(a,b), fsubrp ARG2(b,a))

#define FISUBR_L(a)     CHOICE(fisubrl a, fisubrl a, fisubrl a)

#define FISUBR_W(a)     CHOICE(fisubr a, fisubrs a, fisubrs a)

#define FTST            CHOICE(ftst, ftst, ftst)

#define FUCOM(a)        CHOICE(fucom a, fucom a, fucom a)

#define FUCOMP(a)       CHOICE(fucomp a, fucomp a, fucomp a)

#define FUCOMPP         CHOICE(fucompp, fucompp, fucompp)

#define FWAIT           CHOICE(wait, wait, wait)

#define FXAM            CHOICE(fxam, fxam, fxam)

#define FXCH(a)         CHOICE(fxch a, fxch a, fxch a)

#define FXTRACT         CHOICE(fxtract, fxtract, fxtract)

#define FYL2X           CHOICE(fyl2x, fyl2x, fyl2x)

#define FYL2XP1         CHOICE(fyl2xp1, fyl2xp1, fyl2xp1)

/* New instructions */

#define CPUID           CHOICE(D_BYTE ARG2(15, 162), cpuid, D_BYTE ARG2(15, 162))

#define RDTSC           CHOICE(D_BYTE ARG2(15, 49), rdtsc, D_BYTE ARG2(15, 49))

#else /* NASM_ASSEMBLER || MASM_ASSEMBLER is defined */

        /****************************************/

        /*                                      */

        /*      Intel style assemblers.         */

        /*      (NASM and MASM)                 */

        /*                                      */

        /****************************************/

#define P_EAX           EAX

#define L_EAX           EAX

#define W_AX            AX

#define B_AH            AH

#define B_AL            AL

#define P_EBX           EBX

#define L_EBX           EBX

#define W_BX            BX

#define B_BH            BH

#define B_BL            BL

#define P_ECX           ECX

#define L_ECX           ECX

#define W_CX            CX

#define B_CH            CH

#define B_CL            CL

#define P_EDX           EDX

#define L_EDX           EDX

#define W_DX            DX

#define B_DH            DH

#define B_DL            DL

#define P_EBP           EBP

#define L_EBP           EBP

#define W_BP            BP

#define P_ESI           ESI

#define L_ESI           ESI

#define W_SI            SI

#define P_EDI           EDI

#define L_EDI           EDI

#define W_DI            DI

#define P_ESP           ESP

#define L_ESP           ESP

#define W_SP            SP

#define W_CS            CS

#define W_SS            SS

#define W_DS            DS

#define W_ES            ES

#define W_FS            FS

#define W_GS            GS

#define X_ST            ST

#define D_ST            ST

#define L_ST            ST

#define P_MM0           mm0

#define P_MM1           mm1

#define P_MM2           mm2

#define P_MM3           mm3

#define P_MM4           mm4

#define P_MM5           mm5

#define P_MM6           mm6

#define P_MM7           mm7

#define P_XMM0          xmm0

#define P_XMM1          xmm1

#define P_XMM2          xmm2

#define P_XMM3          xmm3

#define P_XMM4          xmm4

#define P_XMM5          xmm5

#define P_XMM6          xmm6

#define P_XMM7          xmm7

#define CONCAT(x, y)    x ## y

#if defined(NASM_ASSEMBLER)

#define ST(n)           st ## n

#define ST0             st0

#define TBYTE_PTR       tword

#define QWORD_PTR       qword

#define DWORD_PTR       dword

#define WORD_PTR        word

#define BYTE_PTR        byte

#define OFFSET

#define GLOBL                   GLOBAL

#define ALIGNTEXT32             ALIGN 32

#define ALIGNTEXT16             ALIGN 16

#define ALIGNTEXT8              ALIGN 8

#define ALIGNTEXT4              ALIGN 4

#define ALIGNTEXT2              ALIGN 2

#define ALIGNTEXT32ifNOP        ALIGN 32

#define ALIGNTEXT16ifNOP        ALIGN 16

#define ALIGNTEXT8ifNOP         ALIGN 8

#define ALIGNTEXT4ifNOP         ALIGN 4

#define ALIGNDATA32             ALIGN 32

#define ALIGNDATA16             ALIGN 16

#define ALIGNDATA8              ALIGN 8

#define ALIGNDATA4              ALIGN 4

#define ALIGNDATA2              ALIGN 2

#define FILE(s)

#define STRING(s)       db s

#define D_LONG          dd

#define D_WORD          dw

#define D_BYTE          db

/* #define SPACE */

/* #define COMM */

#if defined(__WATCOMC__)

SECTION _TEXT public align=16 class=CODE use32 flat

SECTION _DATA public align=16 class=DATA use32 flat

#define SEG_TEXT        SECTION _TEXT

#define SEG_DATA        SECTION _DATA

#define SEG_BSS         SECTION .bss

#else

#define SEG_DATA        SECTION .data

#define SEG_TEXT        SECTION .text

#define SEG_BSS         SECTION .bss

#endif

#define D_SPACE(n)      db n REP 0

#define AS_BEGIN

/* Jcc's should be handled better than this... */

#define NEAR            near

#else /* MASM */

#define TBYTE_PTR       tbyte ptr

#define QWORD_PTR       qword ptr

#define DWORD_PTR       dword ptr

#define WORD_PTR        word ptr

#define BYTE_PTR        byte ptr

#define OFFSET          offset

#define GLOBL                   GLOBAL

#define ALIGNTEXT32             ALIGN 32

#define ALIGNTEXT16             ALIGN 16

#define ALIGNTEXT8              ALIGN 8

#define ALIGNTEXT4              ALIGN 4

#define ALIGNTEXT2              ALIGN 2

#define ALIGNTEXT32ifNOP        ALIGN 32

#define ALIGNTEXT16ifNOP        ALIGN 16

#define ALIGNTEXT8ifNOP         ALIGN 8

#define ALIGNTEXT4ifNOP         ALIGN 4

#define ALIGNDATA32             ALIGN 32

#define ALIGNDATA16             ALIGN 16

#define ALIGNDATA8              ALIGN 8

#define ALIGNDATA4              ALIGN 4

#define ALIGNDATA2              ALIGN 2

#define FILE(s)

#define STRING(s)       db s

#define D_LONG          dd

#define D_WORD          dw

#define D_BYTE          db

/* #define SPACE */

/* #define COMM */

#define SEG_DATA        .DATA

#define SEG_TEXT        .CODE

#define SEG_BSS         .DATA

#define D_SPACE(n)      db n REP 0

#define AS_BEGIN

#define NEAR

#endif

#if defined(Lynx) || (defined(SYSV) || defined(SVR4)) \

 || (defined(__linux__) || defined(__OS2ELF__)) && defined(__ELF__) \

 || defined(__FreeBSD__) && __FreeBSD__ >= 3

#define GLNAME(a)       a

#else

#define GLNAME(a)       CONCAT(_, a)

#endif

/*

 *      Addressing Modes

 */

/* Immediate Mode */

#define P_ADDR(a)               OFFSET a

#define X_ADDR(a)               OFFSET a

#define D_ADDR(a)               OFFSET a

#define L_ADDR(a)               OFFSET a

#define W_ADDR(a)               OFFSET a

#define B_ADDR(a)               OFFSET a

#define P_CONST(a)              a

#define X_CONST(a)              a

#define D_CONST(a)              a

#define L_CONST(a)              a

#define W_CONST(a)              a

#define B_CONST(a)              a

/* Indirect Mode */

#ifdef NASM_ASSEMBLER

#define P_CONTENT(a)            [a]

#define X_CONTENT(a)            TBYTE_PTR [a]

#define D_CONTENT(a)            QWORD_PTR [a]