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lib: Add setjmp/longjmp for riscv64.

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Note about the -tcc file:

    HAVE_FLOAT_ASM defines if there's assembly support for float
    instructions.

    HAVE_FLOAT defines if there's floating point arithmetic support.

    This is important for TinyCC because the assembler and the C
    compiler are split. TinyCC can HAVE_FLOAT but no assembler support
    for them.

* lib/riscv64-mes-gcc/setjmp.c,
lib/riscv64-mes-tcc/setjmp.c: New files.
This commit is contained in:
Ekaitz Zarraga 2023-10-18 14:41:46 +02:00 committed by Janneke Nieuwenhuizen
parent 1637419a5c
commit 90a1684b89
2 changed files with 160 additions and 7 deletions
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70
lib/riscv64-mes-gcc/setjmp.c
View file

@ -2,6 +2,7 @@
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
* Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
*
* This file is part of GNU Mes.
*
@ -22,19 +23,74 @@
#include <setjmp.h>
#include <stdlib.h>
/* This doesn't do anything at the moment.
* According to setjmp.h "It is not supported to use mes' setjmp implementation together with GCC."
* We cannot offer this functionality as a C function. It remains to be done (as assembly) for tcc.
*/
void
longjmp (jmp_buf env, int val)
{
exit (42);
val = val == 0 ? 1 : val;
asm(
"ld s0, 0(a0)\n\t"
"ld s1, 8(a0)\n\t"
"ld s2, 16(a0)\n\t"
"ld s3, 24(a0)\n\t"
"ld s4, 32(a0)\n\t"
"ld s5, 40(a0)\n\t"
"ld s6, 48(a0)\n\t"
"ld s7, 56(a0)\n\t"
"ld s8, 64(a0)\n\t"
"ld s9, 72(a0)\n\t"
"ld s10, 80(a0)\n\t"
"ld s11, 88(a0)\n\t"
"ld sp, 96(a0)\n\t"
"ld ra, 104(a0)\n\t"
#ifndef __riscv_float_abi_soft
"fld fs0, 112(a0)\n\t"
"fld fs1, 120(a0)\n\t"
"fld fs2, 128(a0)\n\t"
"fld fs3, 136(a0)\n\t"
"fld fs4, 144(a0)\n\t"
"fld fs5, 152(a0)\n\t"
"fld fs6, 160(a0)\n\t"
"fld fs7, 168(a0)\n\t"
"fld fs8, 176(a0)\n\t"
"fld fs9, 184(a0)\n\t"
"fld fs10, 192(a0)\n\t"
"fld fs11, 200(a0)\n\t"
#endif
);
}
int
setjmp (jmp_buf env)
{
return -1;
asm(
"sd s0, 0(a0)\n\t"
"sd s1, 8(a0)\n\t"
"sd s2, 16(a0)\n\t"
"sd s3, 24(a0)\n\t"
"sd s4, 32(a0)\n\t"
"sd s5, 40(a0)\n\t"
"sd s6, 48(a0)\n\t"
"sd s7, 56(a0)\n\t"
"sd s8, 64(a0)\n\t"
"sd s9, 72(a0)\n\t"
"sd s10, 80(a0)\n\t"
"sd s11, 88(a0)\n\t"
"sd sp, 96(a0)\n\t"
"sd ra, 104(a0)\n\t"
#ifndef __riscv_float_abi_soft
"fsd fs0, 112(a0)\n\t"
"fsd fs1, 120(a0)\n\t"
"fsd fs2, 128(a0)\n\t"
"fsd fs3, 136(a0)\n\t"
"fsd fs4, 144(a0)\n\t"
"fsd fs5, 152(a0)\n\t"
"fsd fs6, 160(a0)\n\t"
"fsd fs7, 168(a0)\n\t"
"fsd fs8, 176(a0)\n\t"
"fsd fs9, 184(a0)\n\t"
"fsd fs10, 192(a0)\n\t"
"fsd fs11, 200(a0)\n\t"
#endif
);
return 0;
}

97
lib/riscv64-mes-tcc/setjmp.c Normal file
View file

@ -0,0 +1,97 @@
/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
* Copyright © 2023 Ekaitz Zarraga <ekaitz@elenq.tech>
*
* This file is part of GNU Mes.
*
* GNU Mes 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 of the License, or (at
* your option) any later version.
*
* GNU Mes 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.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <setjmp.h>
#include <stdlib.h>
void
longjmp (jmp_buf env, int val)
{
val = val == 0 ? 1 : val;
asm(
"ld s0, a0,0\n\t"
"ld s1, a0,8\n\t"
"ld s2, a0,16\n\t"
"ld s3, a0,24\n\t"
"ld s4, a0,32\n\t"
"ld s5, a0,40\n\t"
"ld s6, a0,48\n\t"
"ld s7, a0,56\n\t"
"ld s8, a0,64\n\t"
"ld s9, a0,72\n\t"
"ld s10,a0,80\n\t"
"ld s11,a0,88\n\t"
"ld sp, a0,96\n\t"
"ld ra, a0,104\n\t"
#if HAVE_FLOAT_ASM && HAVE_FLOAT && ! __riscv_float_abi_soft
"fld fs0, a0,112\n\t"
"fld fs1, a0,120\n\t"
"fld fs2, a0,128\n\t"
"fld fs3, a0,136\n\t"
"fld fs4, a0,144\n\t"
"fld fs5, a0,152\n\t"
"fld fs6, a0,160\n\t"
"fld fs7, a0,168\n\t"
"fld fs8, a0,176\n\t"
"fld fs9, a0,184\n\t"
"fld fs10,a0,192\n\t"
"fld fs11,a0,200\n\t"
#endif
);
}
int
setjmp (jmp_buf env)
{
asm(
"sd a0, s0,0\n\t"
"sd a0, s1,8\n\t"
"sd a0, s2,16\n\t"
"sd a0, s3,24\n\t"
"sd a0, s4,32\n\t"
"sd a0, s5,40\n\t"
"sd a0, s6,48\n\t"
"sd a0, s7,56\n\t"
"sd a0, s8,64\n\t"
"sd a0, s9,72\n\t"
"sd a0, s10,80\n\t"
"sd a0, s11,88\n\t"
"sd a0, sp,96\n\t"
"sd a0, ra,104\n\t"
#if HAVE_FLOAT_ASM && HAVE_FLOAT && ! __riscv_float_abi_soft
"fsd a0, fs0,112\n\t"
"fsd a0, fs1,120\n\t"
"fsd a0, fs2,128\n\t"
"fsd a0, fs3,136\n\t"
"fsd a0, fs4,144\n\t"
"fsd a0, fs5,152\n\t"
"fsd a0, fs6,160\n\t"
"fsd a0, fs7,168\n\t"
"fsd a0, fs8,176\n\t"
"fsd a0, fs9,184\n\t"
"fsd a0, fs10,192\n\t"
"fsd a0, fs11,200\n\t"
#endif
);
return 0;
}