optab.c

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

#include	"l.h"

#define	X1	0
#define	X2	0
#define	X3	0
#define	C	0xf200

Optab optab[] =
/*	as, fas, srcsp, dstsp, optype, opcode */
{
	{ AXXX },
	{ AABCD, AXXX, X1, X2, X3, 0x4e71 },
	{ AADDB, AXXX, 2, 0, 3, 0xd000, 0x5000,      0, 0x0600 },
	{ AADDL, AXXX, 4, 0, 3, 0xd080, 0x5080, 0xd1c0, 0x0680 },
	{ AADDW, AXXX, 2, 0, 3, 0xd040, 0x5040, 0xd0c0, 0x0640 },
	{ AADDXB },
	{ AADDXL },
	{ AADDXW },
	{ AADJSP },
	{ AANDB, AXXX, 2, 0, 9, 0xc000, 0xc100, 0x0200 },
	{ AANDL, AXXX, 4, 0, 9, 0xc080, 0xc180, 0x0280 },
	{ AANDW, AXXX, 2, 0, 9, 0xc040, 0xc140, 0x0240 },
	{ AASLB, AXXX, 0, 2, 12, 0xe100 },
	{ AASLL, AXXX, 0, 4, 12, 0xe180 },
	{ AASLW, AXXX, 0, 2, 12, 0xe140 },
	{ AASRB, AXXX, 0, 2, 12, 0xe000 },
	{ AASRL, AXXX, 0, 4, 12, 0xe080 },
	{ AASRW, AXXX, 0, 2, 12, 0xe040 },
	{ ABCASE },
	{ ABCC, AXXX, 0, 0, 1, 0x6400 },
	{ ABCHG, AXXX, 2, 2, 27, 0x0140, 0x0840 },
	{ ABCLR, AXXX, 2, 2, 27, 0x0180, 0x0880 },
	{ ABCS, AXXX, 0, 0, 1, 0x6500 },
	{ ABEQ, AXXX, 0, 0, 1, 0x6700 },
	{ ABFCHG },
	{ ABFCLR },
	{ ABFEXTS },
	{ ABFEXTU },
	{ ABFFFO },
	{ ABFINS },
	{ ABFSET },
	{ ABFTST },
	{ ABGE, AXXX, 0, 0, 1, 0x6c00 },
	{ ABGT, AXXX, 0, 0, 1, 0x6e00 },
	{ ABHI, AXXX, 0, 0, 1, 0x6200 },
	{ ABKPT },
	{ ABLE, AXXX, 0, 0, 1, 0x6f00 },
	{ ABLS, AXXX, 0, 0, 1, 0x6300 },
	{ ABLT, AXXX, 0, 0, 1, 0x6d00 },
	{ ABMI, AXXX, 0, 0, 1, 0x6b00 },
	{ ABNE, AXXX, 0, 0, 1, 0x6600 },
	{ ABPL, AXXX, 0, 0, 1, 0x6a00 },
	{ ABRA, AXXX, 0, 0, 1, 0x6000, 0x4ec0 },
	{ ABSET, AXXX, 2, 2, 27, 0x01c0, 0x08c0 },
	{ ABSR, AXXX, 0, 0, 1, 0x6100, 0x4e80 },
	{ ABTST, AXXX, 2, 2, 27, 0x0100, 0x0800 },
	{ ABVC, AXXX, 0, 0, 1, 0x6800 },
	{ ABVS, AXXX, 0, 0, 1, 0x6900 },
	{ ACALLM },
	{ ACAS2B },
	{ ACAS2L },
	{ ACAS2W },
	{ ACASB },
	{ ACASEW },
	{ ACASL },
	{ ACASW },
	{ ACHK2B },
	{ ACHK2L },
	{ ACHK2W },
	{ ACHKL, AXXX, 4, 4, 26, 0x4100 },
	{ ACHKW, AXXX, 2, 2, 26, 0x4180 },
	{ ACLRB, AXXX, 0, -2, 5, 0x4200 },
	{ ACLRL, AXXX, 0, -4, 5, 0x4280 },
	{ ACLRW, AXXX, 0, -2, 5, 0x4240 },
	{ ACMP2B },
	{ ACMP2L },
	{ ACMP2W },
	{ ACMPB, AXXX, 2, 2, 7, 0xb000,      0, 0x0c00, 0xb108 },
	{ ACMPL, AXXX, 4, 4, 7, 0xb080, 0xb100, 0x0c80, 0xb188 },
	{ ACMPW, AXXX, 2, 2, 7, 0xb040, 0xb080, 0x0c40, 0xb148 },
	{ ADATA },
	{ ADBCC, AXXX, 0, 0, 15, 0x54c8 },
	{ ADBCS, AXXX, 0, 0, 15, 0x55c8 },
	{ ADBEQ, AXXX, 0, 0, 15, 0x57c8 },
	{ ADBF, AXXX, 0, 0, 15, 0x51c8 },
	{ ADBGE, AXXX, 0, 0, 15, 0x5cc8 },
	{ ADBGT, AXXX, 0, 0, 15, 0x5ec8 },
	{ ADBHI, AXXX, 0, 0, 15, 0x52c8 },
	{ ADBLE, AXXX, 0, 0, 15, 0x5fc8 },
	{ ADBLS, AXXX, 0, 0, 15, 0x53c8 },
	{ ADBLT, AXXX, 0, 0, 15, 0x5dc8 },
	{ ADBMI, AXXX, 0, 0, 15, 0x5bc8 },
	{ ADBNE, AXXX, 0, 0, 15, 0x56c8 },
	{ ADBPL, AXXX, 0, 0, 15, 0x5ac8 },
	{ ADBT, AXXX, 0, 0, 15, 0x50c8 },
	{ ADBVC, AXXX, 0, 0, 15, 0x58c8 },
	{ ADBVS, AXXX, 0, 0, 15, 0x59c8 },
	{ ADIVSL, AXXX, 4, 0, 14, 0x4c40, 0x0800 },
	{ ADIVSW, AXXX, 2, 0, 13, 0x81c0 },
	{ ADIVUL, AXXX, 4, 0, 14, 0x4c40, 0x0000 },
	{ ADIVUW, AXXX, 2, 0, 13, 0x80c0 },
	{ AEND },
	{ AEORB, AXXX, 2, 0, 10, 0xb100, 0x0a00 },
	{ AEORL, AXXX, 4, 0, 10, 0xb180, 0x0a80 },
	{ AEORW, AXXX, 2, 0, 10, 0xb140, 0x0a40 },
	{ AEXG },
	{ AEXTBL },
	{ AEXTBW, AXXX, 0, 0, 11, 0x4880 },
	{ AEXTWL, AXXX, 0, 0, 11, 0x48c0 },
	{ AFABSB, AXXX, 2, 0, 17, C, 0x0018, 0x5818 },
	{ AFABSD, AFABSL, 8, 0, 17, C, 0x0018, 0x5418 },
	{ AFABSF, AFABSL, 4, 0, 17, C, 0x0018, 0x4418 },
	{ AFABSL, AXXX, 4, 0, 17, C, 0x0018, 0x4018 },
	{ AFABSW, AXXX, 2, 0, 17, C, 0x0018, 0x5018 },
	{ AFACOSB, AXXX, 2, 0, 17, C, 0x001c, 0x581c },
	{ AFACOSD, AFACOSL, 8, 0, 17, C, 0x001c, 0x541c },
	{ AFACOSF, AFACOSL, 4, 0, 17, C, 0x001c, 0x441c },
	{ AFACOSL, AXXX, 4, 0, 17, C, 0x001c, 0x401c },
	{ AFACOSW, AXXX, 2, 0, 17, C, 0x001c, 0x501c },
	{ AFADDB, AXXX, 2, 0, 17, C, 0x0022, 0x5822 },
	{ AFADDD, AFADDL, 8, 0, 17, C, 0x0022, 0x5422 },
	{ AFADDF, AFADDL, 4, 0, 17, C, 0x0022, 0x4422 },
	{ AFADDL, AXXX, 4, 0, 17, C, 0x0022, 0x4022 },
	{ AFADDW, AXXX, 2, 0, 17, C, 0x0022, 0x5022 },
	{ AFASINB, AXXX, 2, 0, 17, C, 0x000c, 0x580c },
	{ AFASIND, AFASINL, 8, 0, 17, C, 0x000c, 0x540c },
	{ AFASINF, AFASINL, 4, 0, 17, C, 0x000c, 0x440c },
	{ AFASINL, AXXX, 4, 0, 17, C, 0x000c, 0x400c },
	{ AFASINW, AXXX, 2, 0, 17, C, 0x000c, 0x500c },
	{ AFATANB, AXXX, 2, 0, 17, C, 0x000a, 0x580a },
	{ AFATAND, AFATANL, 8, 0, 17, C, 0x000a, 0x540a },
	{ AFATANF, AFATANL, 4, 0, 17, C, 0x000a, 0x440a },
	{ AFATANHB, AXXX, 2, 0, 17, C, 0x000d, 0x580d },
	{ AFATANHD, AFATANHL, 8, 0, 17, C, 0x000d, 0x540d },
	{ AFATANHF, AFATANHL, 4, 0, 17, C, 0x000d, 0x440d },
	{ AFATANHL, AXXX, 4, 0, 17, C, 0x000d, 0x400d },
	{ AFATANHW, AXXX, 2, 0, 17, C, 0x000d, 0x500d },
	{ AFATANL, AXXX, 4, 0, 17, C, 0x000a, 0x400a },
	{ AFATANW, AXXX, 2, 0, 17, C, 0x000a, 0x500a },
	{ AFBEQ, AXXX, 0, 0, 18, C+0x81 },
	{ AFBF, AXXX, 0, 0, 18, C+0x8f },
	{ AFBGE, AXXX, 0, 0, 18, C+0x93 },
	{ AFBGT, AXXX, 0, 0, 18, C+0x92 },
	{ AFBLE, AXXX, 0, 0, 18, C+0x95 },
	{ AFBLT, AXXX, 0, 0, 18, C+0x94 },
	{ AFBNE, AXXX, 0, 0, 18, C+0x8e },
	{ AFBT, AXXX, 0, 0, 18, C+0x80 },
	{ AFCMPB, AXXX, 0, 2, 22, C, 0x0038, 0x5838 },
	{ AFCMPD, AFCMPL, 0, 8, 22, C, 0x0038, 0x5438 },
	{ AFCMPF, AFCMPL, 0, 4, 22, C, 0x0038, 0x4438 },
	{ AFCMPL, AXXX, 0, 4, 22, C, 0x0038, 0x4038 },
	{ AFCMPW, AXXX, 0, 2, 22, C, 0x0038, 0x5038 },
	{ AFCOSB, AXXX, 2, 0, 17, C, 0x001d, 0x581d },
	{ AFCOSD, AFCOSL, 8, 0, 17, C, 0x001d, 0x541d },
	{ AFCOSF, AFCOSL, 4, 0, 17, C, 0x001d, 0x441d },
	{ AFCOSHB, AXXX, 2, 0, 17, C, 0x0019, 0x5819 },
	{ AFCOSHD, AFCOSHL, 8, 0, 17, C, 0x0019, 0x5419 },
	{ AFCOSHF, AFCOSHL, 4, 0, 17, C, 0x0019, 0x4419 },
	{ AFCOSHL, AXXX, 4, 0, 17, C, 0x0019, 0x4019 },
	{ AFCOSHW, AXXX, 2, 0, 17, C, 0x0019, 0x5019 },
	{ AFCOSL, AXXX, 4, 0, 17, C, 0x001d, 0x401d },
	{ AFCOSW, AXXX, 2, 0, 17, C, 0x001d, 0x501d },
	{ AFDBEQ, AXXX, 0, 0, 19, C+0x48, 0x01 },
	{ AFDBF, AXXX, 0, 0, 19, C+0x48, 0x0f },
	{ AFDBGE, AXXX, 0, 0, 19, C+0x48, 0x13 },
	{ AFDBGT, AXXX, 0, 0, 19, C+0x48, 0x12 },
	{ AFDBLE, AXXX, 0, 0, 19, C+0x48, 0x15 },
	{ AFDBLT, AXXX, 0, 0, 19, C+0x48, 0x14 },
	{ AFDBNE, AXXX, 0, 0, 19, C+0x48, 0x0e },
	{ AFDBT, AXXX, 0, 0, 19, C+0x48, 0x00 },
	{ AFDIVB, AXXX, 2, 0, 17, C, 0x0020, 0x5820 },
	{ AFDIVD, AFDIVL, 8, 0, 17, C, 0x0020, 0x5420 },
	{ AFDIVF, AFDIVL, 4, 0, 17, C, 0x0020, 0x4420 },
	{ AFDIVL, AXXX, 4, 0, 17, C, 0x0020, 0x4020 },
	{ AFDIVW, AXXX, 2, 0, 17, C, 0x0020, 0x5020 },
	{ AFETOXB, AXXX, 2, 0, 17, C, 0x0010, 0x5810 },
	{ AFETOXD, AFETOXL, 8, 0, 17, C, 0x0010, 0x5410 },
	{ AFETOXF, AFETOXL, 4, 0, 17, C, 0x0010, 0x4410 },
	{ AFETOXL, AXXX, 4, 0, 17, C, 0x0010, 0x4010 },
	{ AFETOXM1B, AXXX, 2, 0, 17, C, 0x0008, 0x5808 },
	{ AFETOXM1D, AFETOXM1L, 8, 0, 17, C, 0x0008, 0x5408 },
	{ AFETOXM1F, AFETOXM1L, 4, 0, 17, C, 0x0008, 0x4408 },
	{ AFETOXM1L, AXXX, 4, 0, 17, C, 0x0008, 0x4008 },
	{ AFETOXM1W, AXXX, 2, 0, 17, C, 0x0008, 0x5008 },
	{ AFETOXW, AXXX, 2, 0, 17, C, 0x0010, 0x5010 },
	{ AFGETEXPB, AXXX, 2, 0, 17, C, 0x001e, 0x581e },
	{ AFGETEXPD, AFGETEXPL, 8, 0, 17, C, 0x001e, 0x541e },
	{ AFGETEXPF, AFGETEXPL, 4, 0, 17, C, 0x001e, 0x441e },
	{ AFGETEXPL, AXXX, 4, 0, 17, C, 0x001e, 0x401e },
	{ AFGETEXPW, AXXX, 2, 0, 17, C, 0x001e, 0x501e },
	{ AFGETMANB, AXXX, 2, 0, 17, C, 0x001f, 0x581f },
	{ AFGETMAND, AFGETMANL, 8, 0, 17, C, 0x001f, 0x541f },
	{ AFGETMANF, AFGETMANL, 4, 0, 17, C, 0x001f, 0x441f },
	{ AFGETMANL, AXXX, 4, 0, 17, C, 0x001f, 0x401f },
	{ AFGETMANW, AXXX, 2, 0, 17, C, 0x001f, 0x501f },
	{ AFINTB, AXXX, 2, 0, 17, C, 0x0001, 0x5801 },
	{ AFINTD, AFINTL, 8, 0, 17, C, 0x0001, 0x5401 },
	{ AFINTF, AFINTL, 4, 0, 17, C, 0x0001, 0x4401 },
	{ AFINTL, AXXX, 4, 0, 17, C, 0x0001, 0x4001 },
	{ AFINTRZB, AXXX, 2, 0, 17, C, 0x0003, 0x5803 },
	{ AFINTRZD, AFINTRZL, 8, 0, 17, C, 0x0003, 0x5403 },
	{ AFINTRZF, AFINTRZL, 4, 0, 17, C, 0x0003, 0x4403 },
	{ AFINTRZL, AXXX, 4, 0, 17, C, 0x0003, 0x4003 },
	{ AFINTRZW, AXXX, 2, 0, 17, C, 0x0003, 0x5003 },
	{ AFINTW, AXXX, 2, 0, 17, C, 0x0001, 0x5001 },
	{ AFLOG10B, AXXX, 2, 0, 17, C, 0x0015, 0x5815 },
	{ AFLOG10D, AFLOG10L, 8, 0, 17, C, 0x0015, 0x5415 },
	{ AFLOG10F, AFLOG10L, 4, 0, 17, C, 0x0015, 0x4415 },
	{ AFLOG10L, AXXX, 4, 0, 17, C, 0x0015, 0x4015 },
	{ AFLOG10W, AXXX, 2, 0, 17, C, 0x0015, 0x5015 },
	{ AFLOG2B, AXXX, 2, 0, 17, C, 0x0016, 0x5816 },
	{ AFLOG2D, AFLOG2L, 8, 0, 17, C, 0x0016, 0x5416 },
	{ AFLOG2F, AFLOG2L, 4, 0, 17, C, 0x0016, 0x4416 },
	{ AFLOG2L, AXXX, 4, 0, 17, C, 0x0016, 0x4016 },
	{ AFLOG2W, AXXX, 2, 0, 17, C, 0x0016, 0x5016 },
	{ AFLOGNB, AXXX, 2, 0, 17, C, 0x0014, 0x5814 },
	{ AFLOGND, AFLOGNL, 8, 0, 17, C, 0x0014, 0x5414 },
	{ AFLOGNF, AFLOGNL, 4, 0, 17, C, 0x0014, 0x4414 },
	{ AFLOGNL, AXXX, 4, 0, 17, C, 0x0014, 0x4014 },
	{ AFLOGNP1B, AXXX, 2, 0, 17, C, 0x0006, 0x5806 },
	{ AFLOGNP1D, AFLOGNP1L, 8, 0, 17, C, 0x0006, 0x5406 },
	{ AFLOGNP1F, AFLOGNP1L, 4, 0, 17, C, 0x0006, 0x4406 },
	{ AFLOGNP1L, AXXX, 4, 0, 17, C, 0x0006, 0x4006 },