Initial support for arm64-darwin.

4 files changed, 108 insertions, 11 deletions

diff --git a/mpn/arm64/arm64-defs.m4 b/mpn/arm64/arm64-defs.m4
new file mode 100644
index 000000000..46149f7bf
--- /dev/null
+++ b/mpn/arm64/arm64-defs.m4
@@ -0,0 +1,53 @@
+divert(-1)
+
+dnl  m4 macros for ARM64 ELF assembler.
+
+dnl  Copyright 2020 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/.
+
+
+dnl  Standard commenting is with @, the default m4 # is for constants and we
+dnl  don't want to disable macro expansions in or after them.
+
+changecom
+
+
+dnl  LEA_HI(reg,gmp_symbol), LEA_LO(reg,gmp_symbol)
+dnl
+dnl  Load the address of gmp_symbol into a register. We split this into two
+dnl  parts to allow separation for manual insn scheduling.
+
+ifdef(`PIC',`dnl
+define(`LEA_HI', `adrp	$1, :got:$2')dnl
+define(`LEA_LO', `ldr	$1, [$1, #:got_lo12:$2]')dnl
+',`dnl
+define(`LEA_HI', `adrp	$1, $2')dnl
+define(`LEA_LO', `add	$1, $1, :lo12:$2')dnl
+')dnl
+
+divert`'dnl
diff --git a/mpn/arm64/bdiv_q_1.asm b/mpn/arm64/bdiv_q_1.asm
index 2e189b884..7fffc9369 100644
--- a/mpn/arm64/bdiv_q_1.asm
+++ b/mpn/arm64/bdiv_q_1.asm
@@ -61,15 +61,9 @@ PROLOGUE(mpn_bdiv_q_1)
 	clz	cnt, x6
 	lsr	d, d, cnt
 
-ifdef(`PIC',`
-	adrp	x7, :got:__gmp_binvert_limb_table
+	LEA_HI(	x7, binvert_limb_table)
 	ubfx	x6, d, 1, 7
-	ldr	x7, [x7, #:got_lo12:__gmp_binvert_limb_table]
-',`
-	adrp	x7, __gmp_binvert_limb_table
-	ubfx	x6, d, 1, 7
-	add	x7, x7, :lo12:__gmp_binvert_limb_table
-')
+	LEA_LO(	x7, binvert_limb_table)
 	ldrb	w6, [x7, x6]
 	ubfiz	x7, x6, 1, 8
 	umull	x6, w6, w6
@@ -81,7 +75,7 @@ ifdef(`PIC',`
 	mul	x6, x6, x6
 	msub	di, x6, d, x7
 
-	b	mpn_pi1_bdiv_q_1
+	b	GSYM_PREFIX`'mpn_pi1_bdiv_q_1
 EPILOGUE()
 
 PROLOGUE(mpn_pi1_bdiv_q_1)
diff --git a/mpn/arm64/darwin.m4 b/mpn/arm64/darwin.m4
new file mode 100644
index 000000000..36e72fe45
--- /dev/null
+++ b/mpn/arm64/darwin.m4
@@ -0,0 +1,50 @@
+divert(-1)
+
+dnl  m4 macros for ARM64 Darwin assembler.
+
+dnl  Copyright 2020 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/.
+
+
+dnl  Standard commenting is with @, the default m4 # is for constants and we
+dnl  don't want to disable macro expansions in or after them.
+
+changecom
+
+
+dnl  LEA_HI(reg,gmp_symbol), LEA_LO(reg,gmp_symbol)
+dnl
+dnl  Load the address of gmp_symbol into a register. We split this into two
+dnl  parts to allow separation for manual insn scheduling.  TODO: Darwin allows
+dnl  for relaxing these two insns into an adr and a nop, but that requires the
+dnl  .loh pseudo for connecting them.
+
+define(`LEA_HI',`adrp	$1, $2@GOTPAGE')dnl
+define(`LEA_LO',`ldr	$1, [$1, $2@GOTPAGEOFF]')dnl
+
+divert`'dnl
diff --git a/mpn/arm64/invert_limb.asm b/mpn/arm64/invert_limb.asm
index a94b0e961..6a99bf002 100644
--- a/mpn/arm64/invert_limb.asm
+++ b/mpn/arm64/invert_limb.asm
@@ -41,9 +41,9 @@ C Compiler generated, mildly edited.  Could surely be further optimised.
 ASM_START()
 PROLOGUE(mpn_invert_limb)
 	lsr	x2, x0, #54
-	adrp	x1, approx_tab
+	LEA_HI(	x1, approx_tab)
 	and	x2, x2, #0x1fe
-	add	x1, x1, :lo12:approx_tab
+	LEA_LO(	x1, approx_tab)
 	ldrh	w3, [x1,x2]
 	lsr	x4, x0, #24
 	add	x4, x4, #1