hphp/runtime/base/string-data-x64.S

   1 #include "hphp/runtime/base/string-data-macros.h"
   2 #include "hphp/util/etch-helpers.h"
   3
   4 #ifdef USE_X86_STRING_HELPERS
   5
   6         .file     "hphp/runtime/base/string-data-x64.S"
   7
   8 /*
   9  * HPHP::StringData::hashHelper() is defined here only when SSE4.2 is
  10  * explicitly specified via __SSE4_2__.
  11  */
  12
  13 ETCH_SECTION(_ZNK4HPHP10StringData10hashHelperEv)
  14 .globl    _ZNK4HPHP10StringData10hashHelperEv
  15 ETCH_TYPE(_ZNK4HPHP10StringData10hashHelperEv, @function)
  16 _ZNK4HPHP10StringData10hashHelperEv:
  17         CFI(startproc)
  18         mov     SD_LEN(%rdi), %ecx
  19         or      $-1, %eax
  20         lea     SD_DATA(%rdi, %rcx), %rdx
  21         neg     %rcx
  22         jnz     ETCH_LABEL(hheader)
  23         jmp     ETCH_LABEL(hend)
  24
  25 ETCH_LABEL(hloop):
  26         crc32q  %rsi, %rax
  27 ETCH_LABEL(hheader):
  28         movabs  $0xdfdfdfdfdfdfdfdf, %rsi
  29         and     (%rdx, %rcx), %rsi
  30         add     $8, %rcx
  31         jnc     ETCH_LABEL(hloop)
  32
  33         shl     $3, %ecx
  34         shl     %cl, %rsi
  35         crc32q  %rsi, %rax
  36
  37 ETCH_LABEL(hend):
  38         shr     %eax
  39         or      %eax, SD_HASH(%rdi)
  40         ret
  41         CFI(endproc)
  42 ETCH_SIZE(_ZNK4HPHP10StringData10hashHelperEv)
  43
  44 #endif