1/*
2** Definitions for x86 and x64 CPUs.
3** Copyright (C) 2005-2014 Mike Pall. See Copyright Notice in luajit.h
4*/
5
6#ifndef _LJ_TARGET_X86_H
7#define _LJ_TARGET_X86_H
8
9/* -- Registers IDs ------------------------------------------------------- */
10
11#if LJ_64
12#define GPRDEF(_) \
13 _(EAX) _(ECX) _(EDX) _(EBX) _(ESP) _(EBP) _(ESI) _(EDI) \
14 _(R8D) _(R9D) _(R10D) _(R11D) _(R12D) _(R13D) _(R14D) _(R15D)
15#define FPRDEF(_) \
16 _(XMM0) _(XMM1) _(XMM2) _(XMM3) _(XMM4) _(XMM5) _(XMM6) _(XMM7) \
17 _(XMM8) _(XMM9) _(XMM10) _(XMM11) _(XMM12) _(XMM13) _(XMM14) _(XMM15)
18#else
19#define GPRDEF(_) \
20 _(EAX) _(ECX) _(EDX) _(EBX) _(ESP) _(EBP) _(ESI) _(EDI)
21#define FPRDEF(_) \
22 _(XMM0) _(XMM1) _(XMM2) _(XMM3) _(XMM4) _(XMM5) _(XMM6) _(XMM7)
23#endif
24#define VRIDDEF(_) \
25 _(MRM)
26
27#define RIDENUM(name) RID_##name,
28
29enum {
30 GPRDEF(RIDENUM) /* General-purpose registers (GPRs). */
31 FPRDEF(RIDENUM) /* Floating-point registers (FPRs). */
32 RID_MAX,
33 RID_MRM = RID_MAX, /* Pseudo-id for ModRM operand. */
34
35 /* Calling conventions. */
36 RID_RET = RID_EAX,
37#if LJ_64
38 RID_FPRET = RID_XMM0,
39#else
40 RID_RETLO = RID_EAX,
41 RID_RETHI = RID_EDX,
42#endif
43
44 /* These definitions must match with the *.dasc file(s): */
45 RID_BASE = RID_EDX, /* Interpreter BASE. */
46#if LJ_64 && !LJ_ABI_WIN
47 RID_LPC = RID_EBX, /* Interpreter PC. */
48 RID_DISPATCH = RID_R14D, /* Interpreter DISPATCH table. */
49#else
50 RID_LPC = RID_ESI, /* Interpreter PC. */
51 RID_DISPATCH = RID_EBX, /* Interpreter DISPATCH table. */
52#endif
53
54 /* Register ranges [min, max) and number of registers. */
55 RID_MIN_GPR = RID_EAX,
56 RID_MIN_FPR = RID_XMM0,
57 RID_MAX_GPR = RID_MIN_FPR,
58 RID_MAX_FPR = RID_MAX,
59 RID_NUM_GPR = RID_MAX_GPR - RID_MIN_GPR,
60 RID_NUM_FPR = RID_MAX_FPR - RID_MIN_FPR,
61};
62
63/* -- Register sets ------------------------------------------------------- */
64
65/* Make use of all registers, except the stack pointer. */
66#define RSET_GPR (RSET_RANGE(RID_MIN_GPR, RID_MAX_GPR)-RID2RSET(RID_ESP))
67#define RSET_FPR (RSET_RANGE(RID_MIN_FPR, RID_MAX_FPR))
68#define RSET_ALL (RSET_GPR|RSET_FPR)
69#define RSET_INIT RSET_ALL
70
71#if LJ_64
72/* Note: this requires the use of FORCE_REX! */
73#define RSET_GPR8 RSET_GPR
74#else
75#define RSET_GPR8 (RSET_RANGE(RID_EAX, RID_EBX+1))
76#endif
77
78/* ABI-specific register sets. */
79#define RSET_ACD (RID2RSET(RID_EAX)|RID2RSET(RID_ECX)|RID2RSET(RID_EDX))
80#if LJ_64
81#if LJ_ABI_WIN
82/* Windows x64 ABI. */
83#define RSET_SCRATCH \
84 (RSET_ACD|RSET_RANGE(RID_R8D, RID_R11D+1)|RSET_RANGE(RID_XMM0, RID_XMM5+1))
85#define REGARG_GPRS \
86 (RID_ECX|((RID_EDX|((RID_R8D|(RID_R9D<<5))<<5))<<5))
87#define REGARG_NUMGPR 4
88#define REGARG_NUMFPR 4
89#define REGARG_FIRSTFPR RID_XMM0
90#define REGARG_LASTFPR RID_XMM3
91#define STACKARG_OFS (4*8)
92#else
93/* The rest of the civilized x64 world has a common ABI. */
94#define RSET_SCRATCH \
95 (RSET_ACD|RSET_RANGE(RID_ESI, RID_R11D+1)|RSET_FPR)
96#define REGARG_GPRS \
97 (RID_EDI|((RID_ESI|((RID_EDX|((RID_ECX|((RID_R8D|(RID_R9D \
98 <<5))<<5))<<5))<<5))<<5))
99#define REGARG_NUMGPR 6
100#define REGARG_NUMFPR 8
101#define REGARG_FIRSTFPR RID_XMM0
102#define REGARG_LASTFPR RID_XMM7
103#define STACKARG_OFS 0
104#endif
105#else
106/* Common x86 ABI. */
107#define RSET_SCRATCH (RSET_ACD|RSET_FPR)
108#define REGARG_GPRS (RID_ECX|(RID_EDX<<5)) /* Fastcall only. */
109#define REGARG_NUMGPR 2 /* Fastcall only. */
110#define REGARG_NUMFPR 0
111#define STACKARG_OFS 0
112#endif
113
114#if LJ_64
115/* Prefer the low 8 regs of each type to reduce REX prefixes. */
116#undef rset_picktop
117#define rset_picktop(rs) (lj_fls(lj_bswap(rs)) ^ 0x18)
118#endif
119
120/* -- Spill slots --------------------------------------------------------- */
121
122/* Spill slots are 32 bit wide. An even/odd pair is used for FPRs.
123**
124** SPS_FIXED: Available fixed spill slots in interpreter frame.
125** This definition must match with the *.dasc file(s).
126**
127** SPS_FIRST: First spill slot for general use. Reserve min. two 32 bit slots.
128*/
129#if LJ_64
130#if LJ_ABI_WIN
131#define SPS_FIXED (4*2)
132#define SPS_FIRST (4*2) /* Don't use callee register save area. */
133#else
134#define SPS_FIXED 4
135#define SPS_FIRST 2
136#endif
137#else
138#define SPS_FIXED 6
139#define SPS_FIRST 2
140#endif
141
142#define SPOFS_TMP 0
143
144#define sps_scale(slot) (4 * (int32_t)(slot))
145#define sps_align(slot) (((slot) - SPS_FIXED + 3) & ~3)
146
147/* -- Exit state ---------------------------------------------------------- */
148
149/* This definition must match with the *.dasc file(s). */
150typedef struct {
151 lua_Number fpr[RID_NUM_FPR]; /* Floating-point registers. */
152 intptr_t gpr[RID_NUM_GPR]; /* General-purpose registers. */
153 int32_t spill[256]; /* Spill slots. */
154} ExitState;
155
156/* Limited by the range of a short fwd jump (127): (2+2)*(32-1)-2 = 122. */
157#define EXITSTUB_SPACING (2+2)
158#define EXITSTUBS_PER_GROUP 32
159
160/* -- x86 ModRM operand encoding ------------------------------------------ */
161
162typedef enum {
163 XM_OFS0 = 0x00, XM_OFS8 = 0x40, XM_OFS32 = 0x80, XM_REG = 0xc0,
164 XM_SCALE1 = 0x00, XM_SCALE2 = 0x40, XM_SCALE4 = 0x80, XM_SCALE8 = 0xc0,
165 XM_MASK = 0xc0
166} x86Mode;
167
168/* Structure to hold variable ModRM operand. */
169typedef struct {
170 int32_t ofs; /* Offset. */
171 uint8_t base; /* Base register or RID_NONE. */
172 uint8_t idx; /* Index register or RID_NONE. */
173 uint8_t scale; /* Index scale (XM_SCALE1 .. XM_SCALE8). */
174} x86ModRM;
175
176/* -- Opcodes ------------------------------------------------------------- */
177
178/* Macros to construct variable-length x86 opcodes. -(len+1) is in LSB. */
179#define XO_(o) ((uint32_t)(0x0000fe + (0x##o<<24)))
180#define XO_FPU(a,b) ((uint32_t)(0x00fd + (0x##a<<16)+(0x##b<<24)))
181#define XO_0f(o) ((uint32_t)(0x0f00fd + (0x##o<<24)))
182#define XO_66(o) ((uint32_t)(0x6600fd + (0x##o<<24)))
183#define XO_660f(o) ((uint32_t)(0x0f66fc + (0x##o<<24)))
184#define XO_f20f(o) ((uint32_t)(0x0ff2fc + (0x##o<<24)))
185#define XO_f30f(o) ((uint32_t)(0x0ff3fc + (0x##o<<24)))
186
187/* This list of x86 opcodes is not intended to be complete. Opcodes are only
188** included when needed. Take a look at DynASM or jit.dis_x86 to see the
189** whole mess.
190*/
191typedef enum {
192 /* Fixed length opcodes. XI_* prefix. */
193 XI_NOP = 0x90,
194 XI_XCHGa = 0x90,
195 XI_CALL = 0xe8,
196 XI_JMP = 0xe9,
197 XI_JMPs = 0xeb,
198 XI_PUSH = 0x50, /* Really 50+r. */
199 XI_JCCs = 0x70, /* Really 7x. */
200 XI_JCCn = 0x80, /* Really 0f8x. */
201 XI_LEA = 0x8d,
202 XI_MOVrib = 0xb0, /* Really b0+r. */
203 XI_MOVri = 0xb8, /* Really b8+r. */
204 XI_ARITHib = 0x80,
205 XI_ARITHi = 0x81,
206 XI_ARITHi8 = 0x83,
207 XI_PUSHi8 = 0x6a,
208 XI_TESTb = 0x84,
209 XI_TEST = 0x85,
210 XI_MOVmi = 0xc7,
211 XI_GROUP5 = 0xff,
212
213 /* Note: little-endian byte-order! */
214 XI_FLDZ = 0xeed9,
215 XI_FLD1 = 0xe8d9,
216 XI_FLDLG2 = 0xecd9,
217 XI_FLDLN2 = 0xedd9,
218 XI_FDUP = 0xc0d9, /* Really fld st0. */
219 XI_FPOP = 0xd8dd, /* Really fstp st0. */
220 XI_FPOP1 = 0xd9dd, /* Really fstp st1. */
221 XI_FRNDINT = 0xfcd9,
222 XI_FSIN = 0xfed9,
223 XI_FCOS = 0xffd9,
224 XI_FPTAN = 0xf2d9,
225 XI_FPATAN = 0xf3d9,
226 XI_FSCALE = 0xfdd9,
227 XI_FYL2X = 0xf1d9,
228
229 /* Variable-length opcodes. XO_* prefix. */
230 XO_MOV = XO_(8b),
231 XO_MOVto = XO_(89),
232 XO_MOVtow = XO_66(89),
233 XO_MOVtob = XO_(88),
234 XO_MOVmi = XO_(c7),
235 XO_MOVmib = XO_(c6),
236 XO_LEA = XO_(8d),
237 XO_ARITHib = XO_(80),
238 XO_ARITHi = XO_(81),
239 XO_ARITHi8 = XO_(83),
240 XO_ARITHiw8 = XO_66(83),
241 XO_SHIFTi = XO_(c1),
242 XO_SHIFT1 = XO_(d1),
243 XO_SHIFTcl = XO_(d3),
244 XO_IMUL = XO_0f(af),
245 XO_IMULi = XO_(69),
246 XO_IMULi8 = XO_(6b),
247 XO_CMP = XO_(3b),
248 XO_TESTb = XO_(84),
249 XO_TEST = XO_(85),
250 XO_GROUP3b = XO_(f6),
251 XO_GROUP3 = XO_(f7),
252 XO_GROUP5b = XO_(fe),
253 XO_GROUP5 = XO_(ff),
254 XO_MOVZXb = XO_0f(b6),
255 XO_MOVZXw = XO_0f(b7),
256 XO_MOVSXb = XO_0f(be),
257 XO_MOVSXw = XO_0f(bf),
258 XO_MOVSXd = XO_(63),
259 XO_BSWAP = XO_0f(c8),
260 XO_CMOV = XO_0f(40),
261
262 XO_MOVSD = XO_f20f(10),
263 XO_MOVSDto = XO_f20f(11),
264 XO_MOVSS = XO_f30f(10),
265 XO_MOVSSto = XO_f30f(11),
266 XO_MOVLPD = XO_660f(12),
267 XO_MOVAPS = XO_0f(28),
268 XO_XORPS = XO_0f(57),
269 XO_ANDPS = XO_0f(54),
270 XO_ADDSD = XO_f20f(58),
271 XO_SUBSD = XO_f20f(5c),
272 XO_MULSD = XO_f20f(59),
273 XO_DIVSD = XO_f20f(5e),
274 XO_SQRTSD = XO_f20f(51),
275 XO_MINSD = XO_f20f(5d),
276 XO_MAXSD = XO_f20f(5f),
277 XO_ROUNDSD = 0x0b3a0ffc, /* Really 66 0f 3a 0b. See asm_fpmath. */
278 XO_UCOMISD = XO_660f(2e),
279 XO_CVTSI2SD = XO_f20f(2a),
280 XO_CVTSD2SI = XO_f20f(2d),
281 XO_CVTTSD2SI= XO_f20f(2c),
282 XO_CVTSI2SS = XO_f30f(2a),
283 XO_CVTSS2SI = XO_f30f(2d),
284 XO_CVTTSS2SI= XO_f30f(2c),
285 XO_CVTSS2SD = XO_f30f(5a),
286 XO_CVTSD2SS = XO_f20f(5a),
287 XO_ADDSS = XO_f30f(58),
288 XO_MOVD = XO_660f(6e),
289 XO_MOVDto = XO_660f(7e),
290
291 XO_FLDd = XO_(d9), XOg_FLDd = 0,
292 XO_FLDq = XO_(dd), XOg_FLDq = 0,
293 XO_FILDd = XO_(db), XOg_FILDd = 0,
294 XO_FILDq = XO_(df), XOg_FILDq = 5,
295 XO_FSTPd = XO_(d9), XOg_FSTPd = 3,
296 XO_FSTPq = XO_(dd), XOg_FSTPq = 3,
297 XO_FISTPq = XO_(df), XOg_FISTPq = 7,
298 XO_FISTTPq = XO_(dd), XOg_FISTTPq = 1,
299 XO_FADDq = XO_(dc), XOg_FADDq = 0,
300 XO_FLDCW = XO_(d9), XOg_FLDCW = 5,
301 XO_FNSTCW = XO_(d9), XOg_FNSTCW = 7
302} x86Op;
303
304/* x86 opcode groups. */
305typedef uint32_t x86Group;
306
307#define XG_(i8, i, g) ((x86Group)(((i8) << 16) + ((i) << 8) + (g)))
308#define XG_ARITHi(g) XG_(XI_ARITHi8, XI_ARITHi, g)
309#define XG_TOXOi(xg) ((x86Op)(0x000000fe + (((xg)<<16) & 0xff000000)))
310#define XG_TOXOi8(xg) ((x86Op)(0x000000fe + (((xg)<<8) & 0xff000000)))
311
312#define XO_ARITH(a) ((x86Op)(0x030000fe + ((a)<<27)))
313#define XO_ARITHw(a) ((x86Op)(0x036600fd + ((a)<<27)))
314
315typedef enum {
316 XOg_ADD, XOg_OR, XOg_ADC, XOg_SBB, XOg_AND, XOg_SUB, XOg_XOR, XOg_CMP,
317 XOg_X_IMUL
318} x86Arith;
319
320typedef enum {
321 XOg_ROL, XOg_ROR, XOg_RCL, XOg_RCR, XOg_SHL, XOg_SHR, XOg_SAL, XOg_SAR
322} x86Shift;
323
324typedef enum {
325 XOg_TEST, XOg_TEST_, XOg_NOT, XOg_NEG, XOg_MUL, XOg_IMUL, XOg_DIV, XOg_IDIV
326} x86Group3;
327
328typedef enum {
329 XOg_INC, XOg_DEC, XOg_CALL, XOg_CALLfar, XOg_JMP, XOg_JMPfar, XOg_PUSH
330} x86Group5;
331
332/* x86 condition codes. */
333typedef enum {
334 CC_O, CC_NO, CC_B, CC_NB, CC_E, CC_NE, CC_BE, CC_NBE,
335 CC_S, CC_NS, CC_P, CC_NP, CC_L, CC_NL, CC_LE, CC_NLE,
336 CC_C = CC_B, CC_NAE = CC_C, CC_NC = CC_NB, CC_AE = CC_NB,
337 CC_Z = CC_E, CC_NZ = CC_NE, CC_NA = CC_BE, CC_A = CC_NBE,
338 CC_PE = CC_P, CC_PO = CC_NP, CC_NGE = CC_L, CC_GE = CC_NL,
339 CC_NG = CC_LE, CC_G = CC_NLE
340} x86CC;
341
342#endif
343