[PATCH 6/6] amend! lib: Add setjmp/longjmp for riscv64.

[Ekaitz Zarraga]

lib: Add setjmp/longjmp for riscv64.

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: New files.
---
 lib/riscv64-mes-gcc/setjmp.c |  4 +-
 lib/riscv64-mes-tcc/setjmp.c | 97 ------------------------------------
 2 files changed, 2 insertions(+), 99 deletions(-)
 delete mode 100644 lib/riscv64-mes-tcc/setjmp.c

diff --git a/lib/riscv64-mes-gcc/setjmp.c b/lib/riscv64-mes-gcc/setjmp.c
index dae21fa0..7c2828f0 100644
--- a/lib/riscv64-mes-gcc/setjmp.c
+++ b/lib/riscv64-mes-gcc/setjmp.c
@@ -42,7 +42,7 @@ longjmp (jmp_buf env, int val)
     "ld s11,   88(a0)\n\t"
     "ld sp,    96(a0)\n\t"
     "ld ra,    104(a0)\n\t"
-#ifndef __riscv_float_abi_soft
+#if HAVE_FLOAT_ASM && HAVE_FLOAT && ! __riscv_float_abi_soft
     "fld fs0,  112(a0)\n\t"
     "fld fs1,  120(a0)\n\t"
     "fld fs2,  128(a0)\n\t"
@@ -77,7 +77,7 @@ setjmp (jmp_buf env)
     "sd s11,  88(a0)\n\t"
     "sd sp,   96(a0)\n\t"
     "sd ra,   104(a0)\n\t"
-#ifndef __riscv_float_abi_soft
+#if HAVE_FLOAT_ASM && HAVE_FLOAT && ! __riscv_float_abi_soft
     "fsd fs0,  112(a0)\n\t"
     "fsd fs1,  120(a0)\n\t"
     "fsd fs2,  128(a0)\n\t"
diff --git a/lib/riscv64-mes-tcc/setjmp.c b/lib/riscv64-mes-tcc/setjmp.c
deleted file mode 100644
index 96434d94..00000000
--- a/lib/riscv64-mes-tcc/setjmp.c
+++ /dev/null
@@ -1,97 +0,0 @@
-/* -*-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;
-}
-
-- 
2.41.0