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dnl  m4 macros for SPARC assembler (32 and 64 bit).


dnl  Copyright 2002, 2011, 2013, 2017, 2021 Free Software Foundation, Inc.

dnl  This file is part of the GNU MP Library.
dnl
dnl  The GNU MP Library is free software; you can redistribute it and/or modify
dnl  it under the terms of either:
dnl
dnl    * the GNU Lesser General Public License as published by the Free
dnl      Software Foundation; either version 3 of the License, or (at your
dnl      option) any later version.
dnl
dnl  or
dnl
dnl    * the GNU General Public License as published by the Free Software
dnl      Foundation; either version 2 of the License, or (at your option) any
dnl      later version.
dnl
dnl  or both in parallel, as here.
dnl
dnl  The GNU MP Library is distributed in the hope that it will be useful, but
dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
dnl  for more details.
dnl
dnl  You should have received copies of the GNU General Public License and the
dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
dnl  see https://www.gnu.org/licenses/.


changecom(;)	dnl cannot use default # since that's used in REGISTER decls


dnl  Usage: REGISTER(reg,attr)
dnl
dnl  Give a ".register reg,attr" directive, if the assembler supports it.
dnl  HAVE_REGISTER comes from the GMP_ASM_SPARC_REGISTER configure test.

define(REGISTER,
m4_assert_numargs(2)
m4_assert_defined(`HAVE_REGISTER')
`ifelse(HAVE_REGISTER,yes,
`.register `$1',`$2'')')


C Testing mechanism for running newer code on older processors
ifdef(`FAKE_T3',`
  include_mpn(`sparc64/ultrasparct3/missing.m4')
',`
  define(`addxccc',	``addxccc'	$1, $2, $3')
  define(`addxc',	``addxc'	$1, $2, $3')
  define(`umulxhi',	``umulxhi'	$1, $2, $3')
  define(`lzcnt',	``lzd'	$1, $2')
')

dnl  Usage: LEA64(symbol,reg,pic_reg)
dnl
dnl  Use whatever 64-bit code sequence is appropriate to load "symbol" into
dnl  register "reg", potentially using register "pic_reg" to perform the
dnl  calculations.
dnl
dnl  Caveat: We used to use the setx pseudo insn here, but some GNU/Linux
dnl  releases causes invalid code or relocs for that.
dnl
dnl  Optimisation 1: Use thunk call instead of RDPC which causes pipeline
dnl  replay for some sparcs.
dnl
dnl  Optimisation 2: Do the two symbol building sequences in parallel instead
dnl  of one after the other.  That might need one more scratch register.

define(LEA64,
m4_assert_numargs(3)
`ifdef(`PIC',`
	rd	%pc, %`$2'
	sethi	%hi(_GLOBAL_OFFSET_TABLE_+4), %`$3'
	add	%`$3', %lo(_GLOBAL_OFFSET_TABLE_+8), %`$3'
	add	%`$2', %`$3', %`$3'
ifelse(HAVE_GDOP,yes,`
	sethi	%gdop_hix22(`$1'), %`$2'
	xor	%`$2', %gdop_lox10(`$1'), %`$2'
	ldx	[%`$3' + %`$2'], %`$2', %gdop(`$1')
',`
	sethi	%hi(`$1'), %`$2'
	or	%`$2', %lo(`$1'), %`$2'
	ldx	[%`$3' + %`$2'], %`$2'
')',`
	sethi	%h44(`$1'), %`$2'
	or	%`$2', %m44(`$1'), %`$2'
	sllx	%`$2', 12, %`$2'
	or	%`$2', %l44(`$1'), %$2
')')

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