x86_64_sse2_x87/pbf/blk/hdr/text.s

   1 ; vim: set filetype=fasm foldmethod=marker commentstring=;%s colorcolumn=101 :
   2 hdr: namespace hdr
   3 ; we don't follow specs: we will try to go best effort in blk_primitive parsing
   4 ; scratch: rax rcx r11 r9
   5 ; from blk
   6 define p                rbx ; in
   7 define p_finish         r12 ; in
   8 ;define flags           r15 ; in/out
   9 align_nops
  10 parse:
  11 .key_next:
  12         cmp p, p_finish
  13                 je blob.hdr.parse.return_from_blk
  14         varint_load r11, p ; key
  15         mov r9, r11; = copy key
  16         shr r11, 3 ;  = field num
  17         ; print strings we are aware of
  18         cmp r11, 4 ; field num = HeaderBlock.required_features (see specs) ?
  19                 je .str_print
  20         cmp r11, 5 ; field num = HeaderBlock.optional_features (see specs) ?
  21                 je .str_print
  22         cmp r11, 16 ; field num = HeaderBlock.writingprogram (see specs) ?
  23                 je .str_print
  24         cmp r11, 17 ; field num = HeaderBlock.source (see specs) ?
  25                 je .str_print
  26         cmp r11, 34 ; field num = HeaderBlock.osmosis_replication_base_url (see specs) ?
  27                 je .str_print
  28         and r9, 111b ;  = field type
  29         TRACE 'PBF:BLK:HDR:MSG:FIELD %lu OF TYPE %lu', r11, r9
  30         val_skip p, r9, r11
  31         jmp .key_next
  32 align_nops
  33 .str_print:
  34         varint_load r9, p ; = str_sz
  35         TRACE 'PBF:BLK:HDR:MSG:STRING %lu of VALUE "%.*s"', r11, r9, p
  36         add p, r9 ; skip the str val
  37         jmp .key_next
  38 ;---------------------------------------------------------------------------------------------------
  39 purge p
  40 purge p_finish
  41 ;purge flags
  42 end namespace ; hdr