asm.m4

divert(-1)

dnl FORTRAN style comment character
define(`C', `
dnl')dnl
dnl Disable m4 comment processing, since the default, #, is used for
dnl constants on some architectures, in particular ARM.
changecom()dnl

dnl Including files from the srcdir
define(`include_src', `include(srcdir/$1)')dnl

dnl default definition, changed in fat builds
define(`fat_transform', `$1')
define(`C_NAME', `SYMBOL_PREFIX`'fat_transform($1)')

dnl Pseudo ops
define(`DECLARE_FUNC',
`ifelse(ELF_STYLE,yes,
`.type $1,TYPE_FUNCTION',
COFF_STYLE, yes,
`.def $1
.scl 2
.type 32
.endef',
`')')

define(`GMP_NUMB_BITS',`')dnl

define(`PROLOGUE',
`.globl C_NAME($1)
DECLARE_FUNC(C_NAME($1))
C_NAME($1): ASM_X86_ENDBR')

define(`EPILOGUE',
`ifelse(ELF_STYLE,yes,
`.size C_NAME($1), . - C_NAME($1)',`')')

define(`m4_log2', `m4_log2_internal($1,1,0)')
define(`m4_log2_internal',
`ifelse($3, 10, `not-a-power-of-two',
$1, $2, $3,
`m4_log2_internal($1, eval(2*$2), eval(1 + $3))')')

dnl Argument to ALIGN is always in bytes, and converted to a
dnl logarithmic .align if necessary.

define(`ALIGN',
`.align ifelse(ALIGN_LOG,yes,`m4_log2($1)',$1)
')

define(`IF_BE', `ifelse(
WORDS_BIGENDIAN,yes,`$1',
WORDS_BIGENDIAN,no,`$2',
`errprint(`Unsupported endianness value',WORDS_BIGENDIAN,`
')
  m4exit(1)')')
define(`IF_LE', `IF_BE(`$2', `$1')')

dnl Struct defining macros

dnl STRUCTURE(prefix) 
define(`STRUCTURE', `define(`SOFFSET', 0)define(`SPREFIX', `$1')')dnl

dnl STRUCT(name, size)
define(`STRUCT',
`define(SPREFIX`_'$1, SOFFSET)dnl
 define(`SOFFSET', eval(SOFFSET + ($2)))')dnl

dnl UCHAR(name)
define(`UCHAR', `STRUCT(`$1', 1)')dnl

dnl UNSIGNED(name)
define(`UNSIGNED', `STRUCT(`$1', 4)')dnl

dnl Offsets in arcfour_ctx
STRUCTURE(ARCFOUR)
  STRUCT(S, 256)
  UCHAR(I)
  UCHAR(J)

dnl Offsets in aes_table
define(AES_SBOX_SIZE,	256)dnl
define(AES_TABLE_SIZE,	1024)dnl

STRUCTURE(AES)
  STRUCT(SBOX, AES_SBOX_SIZE)
  STRUCT(TABLE0, AES_TABLE_SIZE)
  STRUCT(TABLE1, AES_TABLE_SIZE)
  STRUCT(TABLE2, AES_TABLE_SIZE)
  STRUCT(TABLE3, AES_TABLE_SIZE)

C For 64-bit implementation
STRUCTURE(P1305)
  STRUCT(R0, 8)
  STRUCT(R1, 8)
  STRUCT(S0, 8)
  STRUCT(S1, 8)
  STRUCT(H0, 8)
  STRUCT(H1, 8)
  STRUCT(H2, 8)

divert