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rl78.md: New define_expand "subdi3".

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* config/rl78/rl78.md: New define_expand "subdi3".
* config/rl78/subdi3.S: New assembly file.
* config/rl78/t-rl78: Added subdi3.S to LIB2ADD.

From-SVN: r254019
This commit is contained in:
Sebastian Perta 2017-10-23 17:54:02 +00:00 committed by DJ Delorie
parent 8cb41ec663
commit 5feee954e8
5 changed files with 79 additions and 1 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2017-10-23 Sebastian Perta <sebastian.perta@renesas.com>
* config/rl78/rl78.md: New define_expand "subdi3".
2017-10-23 H.J. Lu <hongjiu.lu@intel.com>
PR target/82673

10
gcc/config/rl78/rl78.md
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@ -268,6 +268,16 @@
DONE;"
)
(define_expand "subdi3"
[(set (match_operand:DI 0 "nonimmediate_operand" "")
(minus:DI (match_operand:DI 1 "general_operand" "")
(match_operand:DI 2 "general_operand" "")))
]
""
"rl78_emit_libcall (\"__subdi3\", MINUS, DImode, DImode, 3, operands);
DONE;"
)
(define_insn "subsi3_internal_virt"
[(set (match_operand:SI 0 "nonimmediate_operand" "=v,&vm, vm")
(minus:SI (match_operand:SI 1 "general_operand" "0, vim, vim")

5
libgcc/ChangeLog
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@ -1,3 +1,8 @@
2017-10-23 Sebastian Perta <sebastian.perta@renesas.com>
* config/rl78/subdi3.S: New assembly file.
* config/rl78/t-rl78: Added subdi3.S to LIB2ADD.
2017-10-13 Sebastian Perta <sebastian.perta@renesas.com>
* config/rl78/adddi3.S: New assembly file.

58
libgcc/config/rl78/subdi3.S Normal file
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@ -0,0 +1,58 @@
; Copyright (C) 2017 Free Software Foundation, Inc.
; Contributed by Sebastian Perta.
;
; This file is free software; you can redistribute it and/or modify it
; under the terms of the GNU General Public License as published by the
; Free Software Foundation; either version 3, or (at your option) any
; later version.
;
; This file is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; General Public License for more details.
;
; Under Section 7 of GPL version 3, you are granted additional
; permissions described in the GCC Runtime Library Exception, version
; 3.1, as published by the Free Software Foundation.
;
; You should have received a copy of the GNU General Public License and
; a copy of the GCC Runtime Library Exception along with this program;
; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
; <http://www.gnu.org/licenses/>.
#include "vregs.h"
.text
START_FUNC ___subdi3
movw hl, sp ; use HL-based addressing (allows for direct subw)
movw ax, [hl+4]
subw ax, [hl+12]
movw r8, ax
mov a, [hl+6] ; middle bytes of the result are determined using 8-bit
subc a, [hl+14] ; SUBC insns which both account for and update the carry bit
mov r10, a ; (no SUBWC instruction is available)
mov a, [hl+7]
subc a, [hl+15]
mov r11, a
mov a, [hl+8]
subc a, [hl+16]
mov r12, a
mov a, [hl+9]
subc a, [hl+17]
mov r13, a
movw ax, [hl+10]
sknc ; account for the possible carry from the
decw ax ; latest 8-bit operation
subw ax, [hl+18]
movw r14, ax
ret
END_FUNC ___subdi3

3
libgcc/config/rl78/t-rl78
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@ -31,7 +31,8 @@ LIB2ADD = \
$(srcdir)/config/rl78/fpbit-sf.S \
$(srcdir)/config/rl78/fpmath-sf.S \
$(srcdir)/config/rl78/cmpsi2.S \
$(srcdir)/config/rl78/adddi3.S
$(srcdir)/config/rl78/adddi3.S \
$(srcdir)/config/rl78/subdi3.S
LIB2FUNCS_EXCLUDE = _clzhi2 _clzsi2 _ctzhi2 _ctzsi2 \
_popcounthi2 _popcountsi2 \