diff options
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/ChangeLog | 5 | ||||
| -rw-r--r-- | libgcc/config/rl78/subdi3.S | 58 | ||||
| -rw-r--r-- | libgcc/config/rl78/t-rl78 | 3 |
3 files changed, 65 insertions, 1 deletions
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index 932d12d0aae..f137fdff90f 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -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. diff --git a/libgcc/config/rl78/subdi3.S b/libgcc/config/rl78/subdi3.S new file mode 100644 index 00000000000..f6fcaba89ac --- /dev/null +++ b/libgcc/config/rl78/subdi3.S @@ -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 diff --git a/libgcc/config/rl78/t-rl78 b/libgcc/config/rl78/t-rl78 index 61db78dd326..e035d58c09c 100644 --- a/libgcc/config/rl78/t-rl78 +++ b/libgcc/config/rl78/t-rl78 @@ -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 \ |