mdw@git.distorted.org.uk Git - catacomb/blob - base/asm-common.h

   1 /// -*- mode: asm; asm-comment-char: ?/ -*-
   2 ///
   3 /// Fancy SIMD implementation of Salsa20
   4 ///
   5 /// (c) 2015 Straylight/Edgeware
   6 ///
   7
   8 ///----- Licensing notice ---------------------------------------------------
   9 ///
  10 /// This file is part of Catacomb.
  11 ///
  12 /// Catacomb is free software; you can redistribute it and/or modify
  13 /// it under the terms of the GNU Library General Public License as
  14 /// published by the Free Software Foundation; either version 2 of the
  15 /// License, or (at your option) any later version.
  16 ///
  17 /// Catacomb is distributed in the hope that it will be useful,
  18 /// but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 /// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 /// GNU Library General Public License for more details.
  21 ///
  22 /// You should have received a copy of the GNU Library General Public
  23 /// License along with Catacomb; if not, write to the Free
  24 /// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25 /// MA 02111-1307, USA.
  26
  27 ///--------------------------------------------------------------------------
  28 /// General definitions.
  29
  30 // Preprocessor hacks.
  31 #define STRINGY(x) _STRINGY(x, y)
  32 #define _STRINGY(x) #x
  33 #define GLUE(x, y) _GLUE(x, y)
  34 #define _GLUE(x, y) x##y
  35 #define _EMPTY
  36
  37 // Some useful variables.
  38         .L$_subsec = 0
  39
  40 // Literal pools done the hard way.
  41 #define _LIT .text .L$_subsec + 1
  42 #define _ENDLIT .text .L$_subsec
  43 #define _LTORG .L$_subsec = .L$_subsec + 2; .text .L$_subsec
  44
  45 // ELF section types.
  46 #if __ELF__
  47 #  if CPUFAM_ARMEL
  48 #    define _SECTTY(ty) %ty
  49 #  else
  50 #    define _SECTTY(ty) @ty
  51 #  endif
  52 #endif
  53
  54 // Section selection.
  55 #define TEXT .text .L$_subsec
  56 #if ABI_WIN
  57 #  define RODATA .section .rdata, "dr"
  58 #elif __ELF__
  59 #  define RODATA .section .rodata, "a", _SECTTY(progbits)
  60 #else
  61 #  define RODATA TEXT
  62 #endif
  63 #define DATA .data
  64
  65 // Announcing an external function.
  66 #define FUNC(name)                                                      \
  67         .globl  F(name);                                                \
  68         TYPE_FUNC(name);                                                \
  69         .macro ENDFUNC; _ENDFUNC(name); .endm;                          \
  70         FUNC_PREHOOK(name);                                             \
  71 F(name):                                                                \
  72         FUNC_POSTHOOK(name)
  73
  74 // Marking the end of a function.
  75 #define _ENDFUNC(name)                                                  \
  76         .purgem ENDFUNC;                                                \
  77         SIZE_OBJ(name);                                                 \
  78         ENDFUNC_HOOK(name);                                             \
  79         _LTORG
  80
  81 // Make a helper function, if necessary.
  82 #define AUXFN(name)                                                     \
  83   .ifndef .L$_auxfn_def.name;                                           \
  84         .text 7128;                                                     \
  85         .macro _ENDAUXFN; _ENDAUXFN_TAIL(name); .endm;                  \
  86         FUNC_PREHOOK(name);                                             \
  87 name:
  88 #define _ENDAUXFN_TAIL(name)                                            \
  89         .purgem _ENDAUXFN;                                              \
  90         .text .L$_subsec;                                               \
  91         .L$_auxfn_def.name = 1
  92 #define ENDAUXFN _ENDAUXFN; .endif
  93
  94 ///--------------------------------------------------------------------------
  95 /// ELF-specific hacking.
  96
  97 #if __ELF__
  98
  99 #if __PIC__ || __PIE__
 100 #  define WANT_PIC 1
 101 #endif
 102
 103 #define TYPE_FUNC(name) .type name, STT_FUNC
 104
 105 #define SIZE_OBJ(name) .size name, . - name
 106
 107 #endif
 108
 109 ///--------------------------------------------------------------------------
 110 /// Windows-specific hacking.
 111
 112 #if ABI_WIN
 113
 114 #if CPUFAM_X86
 115 #  define F(name) _##name
 116 #endif
 117
 118 #endif
 119
 120 ///--------------------------------------------------------------------------
 121 /// x86- and amd64-specific hacking.
 122 ///
 123 /// It's (slightly) easier to deal with both of these in one go.
 124
 125 #if CPUFAM_X86 || CPUFAM_AMD64
 126
 127 // Set the function hooks.
 128 #define FUNC_PREHOOK(_) .balign 16
 129
 130 // On Windows, arrange to install stack-unwinding data.
 131 #if CPUFAM_AMD64 && ABI_WIN
 132 #  define FUNC_POSTHOOK(name) .seh_proc name
 133 #  define ENDFUNC_HOOK(_) .seh_endproc
 134 // Procedures are expected to invoke `.seh_setframe' if necessary, and
 135 // `.seh_pushreg' and friends, and `.seh_endprologue'.
 136 #endif
 137
 138 // Don't use the wretched AT&T syntax.  It's festooned with pointless
 139 // punctuation, and all of the data movement is backwards.  Ugh!
 140         .intel_syntax noprefix
 141
 142 // Call external subroutine at ADDR, possibly via PLT.
 143 .macro  callext addr
 144 #if WANT_PIC
 145         call    \addr@PLT
 146 #else
 147         call    \addr
 148 #endif
 149 .endm
 150
 151 // Do I need to arrange a spare GOT register?
 152 #if WANT_PIC && CPUFAM_X86
 153 #  define NEED_GOT 1
 154 #endif
 155 #define GOTREG ebx                      // Not needed in AMD64 so don't care.
 156
 157 // Maybe load GOT address into GOT.
 158 .macro  ldgot got=GOTREG
 159 #if WANT_PIC && CPUFAM_X86
 160   AUXFN(_ldgot.\got)
 161         mov     \got, [esp]
 162         ret
 163   ENDAUXFN
 164         call    _ldgot.\got
 165         add     \got, offset _GLOBAL_OFFSET_TABLE_
 166 #endif
 167 .endm
 168
 169 // Load address of external symbol ADDR into REG, maybe using GOT.
 170 .macro  leaext reg, addr, got=GOTREG
 171 #if WANT_PIC
 172 #  if CPUFAM_X86
 173         mov     \reg, [\got + \addr@GOT]
 174 #  endif
 175 #  if CPUFAM_AMD64
 176         mov     \reg, \addr@GOTPCREL[rip]
 177 #  endif
 178 #else
 179 #  if CPUFAM_X86
 180         mov     \reg, offset \addr
 181 #  endif
 182 #  if CPUFAM_AMD64
 183         lea     \reg, \addr[rip]
 184 #  endif
 185 #endif
 186 .endm
 187
 188 // Address expression (possibly using a base register, and a displacement)
 189 // referring to ADDR, which is within our module, maybe using GOT.
 190 #define INTADDR(...) INTADDR__0(__VA_ARGS__, GOTREG, dummy)
 191 #define INTADDR__0(addr, got, ...) INTADDR__1(addr, got)
 192 #if CPUFAM_AMD64
 193 #  define INTADDR__1(addr, got) addr + rip
 194 #elif WANT_PIC
 195 #  define INTADDR__1(addr, got) got + addr@GOTOFF
 196 #else
 197 #  define INTADDR__1(addr, got) addr
 198 #endif
 199
 200 // Permutations for SIMD instructions.  SHUF(D, C, B, A) is an immediate,
 201 // suitable for use in `pshufd' or `shufpd', which copies element D
 202 // (0 <= D < 4) of the source to element 3 of the destination, element C to
 203 // element 2, element B to element 1, and element A to element 0.
 204 #define SHUF(d, c, b, a) (64*(d) + 16*(c) + 4*(b) + (a))
 205
 206 // Map register names to their individual pieces.
 207
 208 // Apply decoration decor to (internal) register name reg of type ty.
 209 //
 210 // See `R_...' for internal register names.  Decorations are as follows.
 211 //
 212 //      b       low byte (e.g., `al', `r8b')
 213 //      h       high byte (e.g., `ah')
 214 //      w       word (e.g., `ax', `r8w')
 215 //      d       doubleword (e.g., `eax', `r8d')
 216 //      q       quadword (e.g., `rax', `r8')
 217 //      r       whole register (doubleword on x86, quadword on amd64)
 218 //
 219 // And types are as follows.
 220 //
 221 //      abcd    the four traditional registers `a', `b', `c', `d'
 222 //      xp      the four pointer registers `si', `di', `bp', `sp'
 223 //      ip      the instruction pointer `ip'
 224 //      rn      the AMD64 numbered registers `r8'--`r15'
 225 #define _DECOR(ty, decor, reg) _DECOR_##ty##_##decor(reg)
 226
 227 // Internal macros: _DECOR_ty_decor(reg) applies decoration decor to
 228 // (internal) register name reg of type ty.
 229
 230 #define _DECOR_abcd_b(reg) reg##l
 231 #define _DECOR_abcd_h(reg) reg##h
 232 #define _DECOR_abcd_w(reg) reg##x
 233 #define _DECOR_abcd_d(reg) e##reg##x
 234 #if CPUFAM_AMD64
 235 #  define _DECOR_abcd_q(reg) r##reg##x
 236 #endif
 237
 238 #define _DECOR_xp_b(reg) reg##l
 239 #define _DECOR_xp_w(reg) reg
 240 #define _DECOR_xp_d(reg) e##reg
 241 #if CPUFAM_AMD64
 242 #  define _DECOR_xp_q(reg) r##reg
 243 #endif
 244
 245 #define _DECOR_ip_w(reg) reg
 246 #define _DECOR_ip_d(reg) e##reg
 247 #if CPUFAM_AMD64
 248 #  define _DECOR_ip_q(reg) r##reg
 249 #endif
 250
 251 #if CPUFAM_AMD64
 252 #  define _DECOR_rn_b(reg) reg##b
 253 #  define _DECOR_rn_w(reg) reg##w
 254 #  define _DECOR_rn_d(reg) reg##d
 255 #  define _DECOR_rn_q(reg) reg
 256 #  define _DECOR_rn_r(reg) reg
 257 #endif
 258
 259 #if CPUFAM_X86
 260 #  define _DECOR_abcd_r(reg) e##reg##x
 261 #  define _DECOR_xp_r(reg) e##reg
 262 #  define _DECOR_ip_r(reg) e##reg
 263 #endif
 264 #if CPUFAM_AMD64
 265 #  define _DECOR_abcd_r(reg) r##reg##x
 266 #  define _DECOR_xp_r(reg) r##reg
 267 #  define _DECOR_ip_r(reg) r##reg
 268 #endif
 269
 270 #define _DECOR_mem_b(addr) byte ptr addr
 271 #define _DECOR_mem_w(addr) word ptr addr
 272 #define _DECOR_mem_d(addr) dword ptr addr
 273 #if CPUFAM_AMD64
 274 #  define _DECOR_mem_q(addr) qword ptr addr
 275 #endif
 276
 277 // R_r(decor) applies decoration decor to register r, which is an internal
 278 // register name.  The internal register names are: `ip', `a', `b', `c', `d',
 279 // `si', `di', `bp', `sp', `r8'--`r15'.
 280 #define R_ip(decor) _DECOR(ip, decor, ip)
 281 #define R_a(decor) _DECOR(abcd, decor, a)
 282 #define R_b(decor) _DECOR(abcd, decor, b)
 283 #define R_c(decor) _DECOR(abcd, decor, c)
 284 #define R_d(decor) _DECOR(abcd, decor, d)
 285 #define R_si(decor) _DECOR(xp, decor, si)
 286 #define R_di(decor) _DECOR(xp, decor, di)
 287 #define R_bp(decor) _DECOR(xp, decor, bp)
 288 #define R_sp(decor) _DECOR(xp, decor, sp)
 289 #if CPUFAM_AMD64
 290 #  define R_r8(decor) _DECOR(rn, decor, r8)
 291 #  define R_r9(decor) _DECOR(rn, decor, r9)
 292 #  define R_r10(decor) _DECOR(rn, decor, r10)
 293 #  define R_r11(decor) _DECOR(rn, decor, r11)
 294 #  define R_r12(decor) _DECOR(rn, decor, r12)
 295 #  define R_r13(decor) _DECOR(rn, decor, r13)
 296 #  define R_r14(decor) _DECOR(rn, decor, r14)
 297 #  define R_r15(decor) _DECOR(rn, decor, r15)
 298 #endif
 299
 300 // Refer to an in-memory datum of the type implied by decor residing at
 301 // address addr (which should supply its own square-brackets).
 302 #define MEM(decor, addr) _DECOR(mem, decor, addr)
 303
 304 // Applies decoration decor to assembler-level register name reg.
 305 #define _REGFORM(reg, decor) _GLUE(_REGFORM_, reg)(decor)
 306
 307 // Internal macros: _REGFORM_r(decor) applies decoration decor to an
 308 // assembler-level register name, in place of any decoration that register
 309 // name has already.
 310
 311 #define _REGFORM_ip(decor) R_ip(decor)
 312 #define _REGFORM_eip(decor) R_ip(decor)
 313
 314 #define _REGFORM_a(decor) R_a(decor)
 315 #define _REGFORM_al(decor) R_a(decor)
 316 #define _REGFORM_ah(decor) R_a(decor)
 317 #define _REGFORM_ax(decor) R_a(decor)
 318 #define _REGFORM_eax(decor) R_a(decor)
 319
 320 #define _REGFORM_b(decor) R_b(decor)
 321 #define _REGFORM_bl(decor) R_b(decor)
 322 #define _REGFORM_bh(decor) R_b(decor)
 323 #define _REGFORM_bx(decor) R_b(decor)
 324 #define _REGFORM_ebx(decor) R_b(decor)
 325
 326 #define _REGFORM_c(decor) R_c(decor)
 327 #define _REGFORM_cl(decor) R_c(decor)
 328 #define _REGFORM_ch(decor) R_c(decor)
 329 #define _REGFORM_cx(decor) R_c(decor)
 330 #define _REGFORM_ecx(decor) R_c(decor)
 331
 332 #define _REGFORM_d(decor) R_d(decor)
 333 #define _REGFORM_dl(decor) R_d(decor)
 334 #define _REGFORM_dh(decor) R_d(decor)
 335 #define _REGFORM_dx(decor) R_d(decor)
 336 #define _REGFORM_edx(decor) R_d(decor)
 337
 338 #define _REGFORM_si(decor) R_si(decor)
 339 #define _REGFORM_sil(decor) R_si(decor)
 340 #define _REGFORM_esi(decor) R_si(decor)
 341
 342 #define _REGFORM_di(decor) R_di(decor)
 343 #define _REGFORM_dil(decor) R_di(decor)
 344 #define _REGFORM_edi(decor) R_di(decor)
 345
 346 #define _REGFORM_bp(decor) R_bp(decor)
 347 #define _REGFORM_bpl(decor) R_bp(decor)
 348 #define _REGFORM_ebp(decor) R_bp(decor)
 349
 350 #define _REGFORM_sp(decor) R_sp(decor)
 351 #define _REGFORM_spl(decor) R_sp(decor)
 352 #define _REGFORM_esp(decor) R_sp(decor)
 353
 354 #if CPUFAM_AMD64
 355
 356 #  define _REGFORM_rip(decor) R_ip(decor)
 357 #  define _REGFORM_rsp(decor) R_sp(decor)
 358 #  define _REGFORM_rbp(decor) R_bp(decor)
 359 #  define _REGFORM_rdi(decor) R_di(decor)
 360 #  define _REGFORM_rsi(decor) R_si(decor)
 361 #  define _REGFORM_rdx(decor) R_d(decor)
 362 #  define _REGFORM_rcx(decor) R_c(decor)
 363 #  define _REGFORM_rbx(decor) R_b(decor)
 364 #  define _REGFORM_rax(decor) R_a(decor)
 365
 366 #  define _REGFORM_r8(decor) R_r8(decor)
 367 #  define _REGFORM_r8b(decor) R_r8(decor)
 368 #  define _REGFORM_r8w(decor) R_r8(decor)
 369 #  define _REGFORM_r8d(decor) R_r8(decor)
 370
 371 #  define _REGFORM_r9(decor) R_r9(decor)
 372 #  define _REGFORM_r9b(decor) R_r9(decor)
 373 #  define _REGFORM_r9w(decor) R_r9(decor)
 374 #  define _REGFORM_r9d(decor) R_r9(decor)
 375
 376 #  define _REGFORM_r10(decor) R_r10(decor)
 377 #  define _REGFORM_r10b(decor) R_r10(decor)
 378 #  define _REGFORM_r10w(decor) R_r10(decor)
 379 #  define _REGFORM_r10d(decor) R_r10(decor)
 380
 381 #  define _REGFORM_r11(decor) R_r11(decor)
 382 #  define _REGFORM_r11b(decor) R_r11(decor)
 383 #  define _REGFORM_r11w(decor) R_r11(decor)
 384 #  define _REGFORM_r11d(decor) R_r11(decor)
 385
 386 #  define _REGFORM_r12(decor) R_r12(decor)
 387 #  define _REGFORM_r12b(decor) R_r12(decor)
 388 #  define _REGFORM_r12w(decor) R_r12(decor)
 389 #  define _REGFORM_r12d(decor) R_r12(decor)
 390
 391 #  define _REGFORM_r13(decor) R_r13(decor)
 392 #  define _REGFORM_r13b(decor) R_r13(decor)
 393 #  define _REGFORM_r13w(decor) R_r13(decor)
 394 #  define _REGFORM_r13d(decor) R_r13(decor)
 395
 396 #  define _REGFORM_r14(decor) R_r14(decor)
 397 #  define _REGFORM_r14b(decor) R_r14(decor)
 398 #  define _REGFORM_r14w(decor) R_r14(decor)
 399 #  define _REGFORM_r14d(decor) R_r14(decor)
 400
 401 #  define _REGFORM_r15(decor) R_r15(decor)
 402 #  define _REGFORM_r15b(decor) R_r15(decor)
 403 #  define _REGFORM_r15w(decor) R_r15(decor)
 404 #  define _REGFORM_r15d(decor) R_r15(decor)
 405
 406 #endif
 407
 408 // Macros for converting register names.
 409 #define BYTE(reg) _REGFORM(reg, b)
 410 #define HIBYTE(reg) _REGFORM(reg, h)
 411 #define WORD(reg) _REGFORM(reg, w)
 412 #define DWORD(reg) _REGFORM(reg, d)
 413 #if CPUFAM_AMD64
 414 #  define QWORD(reg) _REGFORM(reg, q)
 415 #endif
 416 #define WHOLE(reg) _REGFORM(reg, r)
 417
 418 #endif
 419
 420 #if CPUFAM_X86
 421
 422 .macro  _reg.0
 423         // Stash GP registers and establish temporary stack frame.
 424         pushfd
 425         push    eax
 426         push    ecx
 427         push    edx
 428         push    ebp
 429         mov     ebp, esp
 430         and     esp, ~15
 431         sub     esp, 512
 432         fxsave  [esp]
 433 .endm
 434
 435 .macro  _reg.1
 436 .endm
 437
 438 .macro  _reg.2
 439 .endm
 440
 441 .macro  _reg.3  fmt
 442         // Print FMT and the other established arguments.
 443         lea     eax, .L$_reg$msg.\@
 444         push    eax
 445         call    printf
 446         jmp     .L$_reg$cont.\@
 447 .L$_reg$msg.\@:
 448         .ascii  ";; \fmt\n\0"
 449 .L$_reg$cont.\@:
 450         mov     eax, ebp
 451         and     eax, ~15
 452         sub     eax, 512
 453         fxrstor [eax]
 454         mov     esp, ebp
 455         pop     ebp
 456         pop     edx
 457         pop     ecx
 458         pop     eax
 459         popfd
 460 .endm
 461
 462 .macro  msg     msg
 463         _reg.0
 464         _reg.1
 465         _reg.2
 466         _reg.3  "\msg"
 467 .endm
 468
 469 .macro  reg     r, msg
 470         _reg.0
 471   .ifeqs "\r", "esp"
 472         lea     eax, [ebp + 20]
 473         push    eax
 474   .else
 475     .ifeqs "\r", "ebp"
 476         push    [ebp]
 477     .else
 478         push    \r
 479     .endif
 480   .endif
 481         _reg.1
 482         _reg.2
 483         _reg.3  "\msg: \r = %08x"
 484 .endm
 485
 486 .macro  xmmreg  r, msg
 487         _reg.0
 488         _reg.1
 489         _reg.2
 490         movdqu  xmm0, \r
 491         pshufd  xmm0, xmm0, 0x1b
 492         sub     esp, 16
 493         movdqa  [esp], xmm0
 494         _reg.3  "\msg: \r = %08x %08x %08x %08x"
 495 .endm
 496
 497 .macro  mmreg   r, msg
 498         _reg.0
 499         _reg.1
 500         _reg.2
 501         pshufw  \r, \r, 0x4e
 502         sub     esp, 8
 503         movq    [esp], \r
 504         _reg.3  "\msg: \r = %08x %08x"
 505 .endm
 506
 507 .macro  freg    i, msg
 508         _reg.0
 509         _reg.1
 510         _reg.2
 511         finit
 512         fldt    [esp + 32 + 16*\i]
 513         sub     esp, 12
 514         fstpt   [esp]
 515         _reg.3  "\msg: st(\i) = %.20Lg"
 516 .endm
 517
 518 .macro  fxreg   i, msg
 519         _reg.0
 520         _reg.1
 521         _reg.2
 522         finit
 523         fldt    [esp + 32 + 16*\i]
 524         sub     esp, 12
 525         fstpt   [esp]
 526         _reg.3  "\msg: st(\i) = %La"
 527 .endm
 528
 529 #endif
 530
 531 ///--------------------------------------------------------------------------
 532 /// ARM-specific hacking.
 533
 534 #if CPUFAM_ARMEL
 535
 536 // ARM/Thumb mode things.  Use ARM by default.
 537 #define ARM .arm; .L$_pcoff = 8
 538 #define THUMB .thumb; .L$_pcoff = 4
 539         ARM
 540
 541 // Set the function hooks.
 542 #define FUNC_PREHOOK(_) .balign 4
 543 #define ENDFUNC_HOOK(name) .ltorg
 544
 545 // Call external subroutine at ADDR, possibly via PLT.
 546 .macro  callext addr, cond=
 547 #if WANT_PIC
 548         bl\cond \addr(PLT)
 549 #else
 550         bl\cond \addr
 551 #endif
 552 .endm
 553
 554 // Do I need to arrange a spare GOT register?
 555 #if WANT_PIC
 556 #  define NEED_GOT 1
 557 #endif
 558 #define GOTREG r9
 559
 560 // Maybe load GOT address into GOT.
 561 .macro  ldgot   cond=, got=GOTREG
 562 #if WANT_PIC
 563         ldr\cond \got, .L$_ldgot$\@
 564 .L$_ldgot_pc$\@:
 565         add\cond \got, pc, \got
 566   _LIT
 567         .balign 4
 568 .L$_ldgot$\@:
 569         .word   _GLOBAL_OFFSET_TABLE_ - .L$_ldgot_pc$\@ - .L$_pcoff
 570   _ENDLIT
 571 #endif
 572 .endm
 573
 574 // Load address of external symbol ADDR into REG, maybe using GOT.
 575 .macro  leaext  reg, addr, cond=, got=GOTREG
 576 #if WANT_PIC
 577         ldr\cond \reg, .L$_leaext$\@
 578         ldr\cond \reg, [\got, \reg]
 579   _LIT
 580         .balign 4
 581 .L$_leaext$\@:
 582         .word   \addr(GOT)
 583   _ENDLIT
 584 #else
 585         ldr\cond \reg, =\addr
 586 #endif
 587 .endm
 588
 589 // Load address of external symbol ADDR into REG directly.
 590 .macro  leaextq reg, addr, cond=
 591 #if WANT_PIC
 592         ldr\cond \reg, .L$_leaextq$\@
 593 .L$_leaextq_pc$\@:
 594         .if     .L$_pcoff == 8
 595         ldr\cond \reg, [pc, \reg]
 596         .else
 597         add\cond \reg, pc
 598         ldr\cond \reg, [\reg]
 599         .endif
 600   _LIT
 601         .balign 4
 602 .L$_leaextq$\@:
 603         .word   \addr(GOT_PREL) + (. - .L$_leaextq_pc$\@ - .L$_pcoff)
 604   _ENDLIT
 605 #else
 606         ldr\cond \reg, =\addr
 607 #endif
 608 .endm
 609
 610 // Apply decoration decor to register name reg.
 611 #define _REGFORM(reg, decor) _GLUE(_REGFORM_, reg)(decor)
 612
 613 // Internal macros: `_REGFORM_r(decor)' applies decoration decor to register
 614 // name r.
 615
 616 #define _REGFORM_s0(decor) _DECOR(s, decor, 0)
 617 #define _REGFORM_s1(decor) _DECOR(s, decor, 1)
 618 #define _REGFORM_s2(decor) _DECOR(s, decor, 2)
 619 #define _REGFORM_s3(decor) _DECOR(s, decor, 3)
 620 #define _REGFORM_s4(decor) _DECOR(s, decor, 4)
 621 #define _REGFORM_s5(decor) _DECOR(s, decor, 5)
 622 #define _REGFORM_s6(decor) _DECOR(s, decor, 6)
 623 #define _REGFORM_s7(decor) _DECOR(s, decor, 7)
 624 #define _REGFORM_s8(decor) _DECOR(s, decor, 8)
 625 #define _REGFORM_s9(decor) _DECOR(s, decor, 9)
 626 #define _REGFORM_s10(decor) _DECOR(s, decor, 10)
 627 #define _REGFORM_s11(decor) _DECOR(s, decor, 11)
 628 #define _REGFORM_s12(decor) _DECOR(s, decor, 12)
 629 #define _REGFORM_s13(decor) _DECOR(s, decor, 13)
 630 #define _REGFORM_s14(decor) _DECOR(s, decor, 14)
 631 #define _REGFORM_s15(decor) _DECOR(s, decor, 15)
 632 #define _REGFORM_s16(decor) _DECOR(s, decor, 16)
 633 #define _REGFORM_s17(decor) _DECOR(s, decor, 17)
 634 #define _REGFORM_s18(decor) _DECOR(s, decor, 18)
 635 #define _REGFORM_s19(decor) _DECOR(s, decor, 19)
 636 #define _REGFORM_s20(decor) _DECOR(s, decor, 20)
 637 #define _REGFORM_s21(decor) _DECOR(s, decor, 21)
 638 #define _REGFORM_s22(decor) _DECOR(s, decor, 22)
 639 #define _REGFORM_s23(decor) _DECOR(s, decor, 23)
 640 #define _REGFORM_s24(decor) _DECOR(s, decor, 24)
 641 #define _REGFORM_s25(decor) _DECOR(s, decor, 25)
 642 #define _REGFORM_s26(decor) _DECOR(s, decor, 26)
 643 #define _REGFORM_s27(decor) _DECOR(s, decor, 27)
 644 #define _REGFORM_s28(decor) _DECOR(s, decor, 28)
 645 #define _REGFORM_s29(decor) _DECOR(s, decor, 29)
 646 #define _REGFORM_s30(decor) _DECOR(s, decor, 30)
 647 #define _REGFORM_s31(decor) _DECOR(s, decor, 31)
 648
 649 #define _REGFORM_d0(decor) _DECOR(d, decor, 0)
 650 #define _REGFORM_d1(decor) _DECOR(d, decor, 1)
 651 #define _REGFORM_d2(decor) _DECOR(d, decor, 2)
 652 #define _REGFORM_d3(decor) _DECOR(d, decor, 3)
 653 #define _REGFORM_d4(decor) _DECOR(d, decor, 4)
 654 #define _REGFORM_d5(decor) _DECOR(d, decor, 5)
 655 #define _REGFORM_d6(decor) _DECOR(d, decor, 6)
 656 #define _REGFORM_d7(decor) _DECOR(d, decor, 7)
 657 #define _REGFORM_d8(decor) _DECOR(d, decor, 8)
 658 #define _REGFORM_d9(decor) _DECOR(d, decor, 9)
 659 #define _REGFORM_d10(decor) _DECOR(d, decor, 10)
 660 #define _REGFORM_d11(decor) _DECOR(d, decor, 11)
 661 #define _REGFORM_d12(decor) _DECOR(d, decor, 12)
 662 #define _REGFORM_d13(decor) _DECOR(d, decor, 13)
 663 #define _REGFORM_d14(decor) _DECOR(d, decor, 14)
 664 #define _REGFORM_d15(decor) _DECOR(d, decor, 15)
 665 #define _REGFORM_d16(decor) _DECOR(d, decor, 16)
 666 #define _REGFORM_d17(decor) _DECOR(d, decor, 17)
 667 #define _REGFORM_d18(decor) _DECOR(d, decor, 18)
 668 #define _REGFORM_d19(decor) _DECOR(d, decor, 19)
 669 #define _REGFORM_d20(decor) _DECOR(d, decor, 20)
 670 #define _REGFORM_d21(decor) _DECOR(d, decor, 21)
 671 #define _REGFORM_d22(decor) _DECOR(d, decor, 22)
 672 #define _REGFORM_d23(decor) _DECOR(d, decor, 23)
 673 #define _REGFORM_d24(decor) _DECOR(d, decor, 24)
 674 #define _REGFORM_d25(decor) _DECOR(d, decor, 25)
 675 #define _REGFORM_d26(decor) _DECOR(d, decor, 26)
 676 #define _REGFORM_d27(decor) _DECOR(d, decor, 27)
 677 #define _REGFORM_d28(decor) _DECOR(d, decor, 28)
 678 #define _REGFORM_d29(decor) _DECOR(d, decor, 29)
 679 #define _REGFORM_d30(decor) _DECOR(d, decor, 30)
 680 #define _REGFORM_d31(decor) _DECOR(d, decor, 31)
 681
 682 #define _REGFORM_q0(decor) _DECOR(q, decor, 0)
 683 #define _REGFORM_q1(decor) _DECOR(q, decor, 1)
 684 #define _REGFORM_q2(decor) _DECOR(q, decor, 2)
 685 #define _REGFORM_q3(decor) _DECOR(q, decor, 3)
 686 #define _REGFORM_q4(decor) _DECOR(q, decor, 4)
 687 #define _REGFORM_q5(decor) _DECOR(q, decor, 5)
 688 #define _REGFORM_q6(decor) _DECOR(q, decor, 6)
 689 #define _REGFORM_q7(decor) _DECOR(q, decor, 7)
 690 #define _REGFORM_q8(decor) _DECOR(q, decor, 8)
 691 #define _REGFORM_q9(decor) _DECOR(q, decor, 9)
 692 #define _REGFORM_q10(decor) _DECOR(q, decor, 10)
 693 #define _REGFORM_q11(decor) _DECOR(q, decor, 11)
 694 #define _REGFORM_q12(decor) _DECOR(q, decor, 12)
 695 #define _REGFORM_q13(decor) _DECOR(q, decor, 13)
 696 #define _REGFORM_q14(decor) _DECOR(q, decor, 14)
 697 #define _REGFORM_q15(decor) _DECOR(q, decor, 15)
 698
 699 // `_LOPART(n)' and `_HIPART(n)' return the numbers of the register halves of
 700 // register n, i.e., 2*n and 2*n + 1 respectively.
 701 #define _LOPART(n) _GLUE(_LOPART_, n)
 702 #define _HIPART(n) _GLUE(_HIPART_, n)
 703
 704 // Internal macros: `_LOPART_n' and `_HIPART_n' return the numbers of the
 705 // register halves of register n, i.e., 2*n and 2*n + 1 respectively.
 706
 707 #define _LOPART_0 0
 708 #define _HIPART_0 1
 709 #define _LOPART_1 2
 710 #define _HIPART_1 3
 711 #define _LOPART_2 4
 712 #define _HIPART_2 5
 713 #define _LOPART_3 6
 714 #define _HIPART_3 7
 715 #define _LOPART_4 8
 716 #define _HIPART_4 9
 717 #define _LOPART_5 10
 718 #define _HIPART_5 11
 719 #define _LOPART_6 12
 720 #define _HIPART_6 13
 721 #define _LOPART_7 14
 722 #define _HIPART_7 15
 723 #define _LOPART_8 16
 724 #define _HIPART_8 17
 725 #define _LOPART_9 18
 726 #define _HIPART_9 19
 727 #define _LOPART_10 20
 728 #define _HIPART_10 21
 729 #define _LOPART_11 22
 730 #define _HIPART_11 23
 731 #define _LOPART_12 24
 732 #define _HIPART_12 25
 733 #define _LOPART_13 26
 734 #define _HIPART_13 27
 735 #define _LOPART_14 28
 736 #define _HIPART_14 29
 737 #define _LOPART_15 30
 738 #define _HIPART_15 31
 739
 740 // Return the register number of the pair containing register n, i.e.,
 741 // floor(n/2).
 742 #define _PAIR(n) _GLUE(_PAIR_, n)
 743
 744 // Internal macros: `_PAIR_n' returns the register number of the pair
 745 // containing register n, i.e., floor(n/2).
 746 #define _PAIR_0 0
 747 #define _PAIR_1 0
 748 #define _PAIR_2 1
 749 #define _PAIR_3 1
 750 #define _PAIR_4 2
 751 #define _PAIR_5 2
 752 #define _PAIR_6 3
 753 #define _PAIR_7 3
 754 #define _PAIR_8 4
 755 #define _PAIR_9 4
 756 #define _PAIR_10 5
 757 #define _PAIR_11 5
 758 #define _PAIR_12 6
 759 #define _PAIR_13 6
 760 #define _PAIR_14 7
 761 #define _PAIR_15 7
 762 #define _PAIR_16 8
 763 #define _PAIR_17 8
 764 #define _PAIR_18 9
 765 #define _PAIR_19 9
 766 #define _PAIR_20 10
 767 #define _PAIR_21 10
 768 #define _PAIR_22 11
 769 #define _PAIR_23 11
 770 #define _PAIR_24 12
 771 #define _PAIR_25 12
 772 #define _PAIR_26 13
 773 #define _PAIR_27 13
 774 #define _PAIR_28 14
 775 #define _PAIR_29 14
 776 #define _PAIR_30 15
 777 #define _PAIR_31 15
 778
 779 // Apply decoration decor to register number n of type ty.  Decorations are
 780 // as follows.
 781 //
 782 //      decor   types   meaning
 783 //      Q       s, d    the NEON qN register containing this one
 784 //      D       s       the NEON dN register containing this one
 785 //      D0      q       the low 64-bit half of this one
 786 //      D1      q       the high 64-bit half of this one
 787 //      S0      d, q    the first 32-bit piece of this one
 788 //      S1      d, q    the second 32-bit piece of this one
 789 //      S2      q       the third 32-bit piece of this one
 790 //      S3      q       the fourth 32-bit piece of this one
 791 //      Bn      q       the nth byte of this register, as a scalar
 792 //      Hn      q       the nth halfword of this register, as a scalar
 793 //      Wn      q       the nth word of this register, as a scalar
 794 #define _DECOR(ty, decor, n) _DECOR_##ty##_##decor(n)
 795
 796 // Internal macros: `_DECOR_ty_decor(n)' applies decoration decor to register
 797 // number n of type ty.
 798
 799 #define _DECOR_s_Q(n) GLUE(q, _PAIR(_PAIR(n)))
 800 #define _DECOR_s_D(n) GLUE(d, _PAIR(n))
 801
 802 #define _DECOR_d_Q(n) GLUE(q, _PAIR(n))
 803 #define _DECOR_d_S0(n) GLUE(s, _LOPART(n))
 804 #define _DECOR_d_S1(n) GLUE(s, _LOPART(n))
 805
 806 #define _DECOR_q_D0(n) GLUE(d, _LOPART(n))
 807 #define _DECOR_q_D1(n) GLUE(d, _HIPART(n))
 808 #define _DECOR_q_S0(n) GLUE(s, _LOPART(_LOPART(n)))
 809 #define _DECOR_q_S1(n) GLUE(s, _HIPART(_LOPART(n)))
 810 #define _DECOR_q_S2(n) GLUE(s, _LOPART(_HIPART(n)))
 811 #define _DECOR_q_S3(n) GLUE(s, _HIPART(_HIPART(n)))
 812 #define _DECOR_q_W0(n) GLUE(d, _LOPART(n))[0]
 813 #define _DECOR_q_W1(n) GLUE(d, _LOPART(n))[1]
 814 #define _DECOR_q_W2(n) GLUE(d, _HIPART(n))[0]
 815 #define _DECOR_q_W3(n) GLUE(d, _HIPART(n))[1]
 816 #define _DECOR_q_H0(n) GLUE(d, _LOPART(n))[0]
 817 #define _DECOR_q_H1(n) GLUE(d, _LOPART(n))[1]
 818 #define _DECOR_q_H2(n) GLUE(d, _LOPART(n))[2]
 819 #define _DECOR_q_H3(n) GLUE(d, _LOPART(n))[3]
 820 #define _DECOR_q_H4(n) GLUE(d, _HIPART(n))[0]
 821 #define _DECOR_q_H5(n) GLUE(d, _HIPART(n))[1]
 822 #define _DECOR_q_H6(n) GLUE(d, _HIPART(n))[2]
 823 #define _DECOR_q_H7(n) GLUE(d, _HIPART(n))[3]
 824 #define _DECOR_q_B0(n) GLUE(d, _LOPART(n))[0]
 825 #define _DECOR_q_B1(n) GLUE(d, _LOPART(n))[1]
 826 #define _DECOR_q_B2(n) GLUE(d, _LOPART(n))[2]
 827 #define _DECOR_q_B3(n) GLUE(d, _LOPART(n))[3]
 828 #define _DECOR_q_B4(n) GLUE(d, _LOPART(n))[4]
 829 #define _DECOR_q_B5(n) GLUE(d, _LOPART(n))[5]
 830 #define _DECOR_q_B6(n) GLUE(d, _LOPART(n))[6]
 831 #define _DECOR_q_B7(n) GLUE(d, _LOPART(n))[7]
 832 #define _DECOR_q_B8(n) GLUE(d, _HIPART(n))[0]
 833 #define _DECOR_q_B9(n) GLUE(d, _HIPART(n))[1]
 834 #define _DECOR_q_B10(n) GLUE(d, _HIPART(n))[2]
 835 #define _DECOR_q_B11(n) GLUE(d, _HIPART(n))[3]
 836 #define _DECOR_q_B12(n) GLUE(d, _HIPART(n))[4]
 837 #define _DECOR_q_B13(n) GLUE(d, _HIPART(n))[5]
 838 #define _DECOR_q_B14(n) GLUE(d, _HIPART(n))[6]
 839 #define _DECOR_q_B15(n) GLUE(d, _HIPART(n))[7]
 840
 841 // Macros for navigating the NEON register hierarchy.
 842 #define S0(reg) _REGFORM(reg, S0)
 843 #define S1(reg) _REGFORM(reg, S1)
 844 #define S2(reg) _REGFORM(reg, S2)
 845 #define S3(reg) _REGFORM(reg, S3)
 846 #define D(reg) _REGFORM(reg, D)
 847 #define D0(reg) _REGFORM(reg, D0)
 848 #define D1(reg) _REGFORM(reg, D1)
 849 #define Q(reg) _REGFORM(reg, Q)
 850
 851 // Macros for indexing quadword registers.
 852 #define QB(reg, i) _REGFORM(reg, B##i)
 853 #define QH(reg, i) _REGFORM(reg, H##i)
 854 #define QW(reg, i) _REGFORM(reg, W##i)
 855
 856 // Macros for converting vldm/vstm ranges.
 857 #define QQ(qlo, qhi) D0(qlo)-D1(qhi)
 858
 859 #endif
 860
 861 ///--------------------------------------------------------------------------
 862 /// Final stuff.
 863
 864 // Default values for the various hooks.
 865 #ifndef FUNC_PREHOOK
 866 #  define FUNC_PREHOOK(name)
 867 #endif
 868 #ifndef FUNC_POSTHOOK
 869 #  define FUNC_POSTHOOK(name)
 870 #endif
 871 #ifndef ENDFUNC_HOOK
 872 #  define ENDFUNC_HOOK(name)
 873 #endif
 874
 875 #ifndef F
 876 #  define F(name) name
 877 #endif
 878
 879 #ifndef TYPE_FUNC
 880 #  define TYPE_FUNC(name)
 881 #endif
 882
 883 #ifndef SIZE_OBJ
 884 #  define SIZE_OBJ(name)
 885 #endif
 886
 887 #if __ELF__ && defined(WANT_EXECUTABLE_STACK)
 888         .pushsection .note.GNU-stack, "", _SECTTY(progbits)
 889         .popsection
 890 #endif
 891
 892 ///----- That's all, folks --------------------------------------------------