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RISC-V: Add hard float support for 32-bit CPUs

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This patch adds support for hardware floating-point support for the
RV32IF and RV32IFD platforms.

Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
This commit is contained in:
Zong Li 2018-11-30 17:16:38 +08:00 committed by Alistair Francis
parent 5b6113d62e
commit 941a55cf59
4 changed files with 124 additions and 0 deletions
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31
sysdeps/riscv/rv32/rvd/s_lrint.c Normal file
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/* lrint(). The 32-bit RISC-V (RV32) version.
Copyright (C) 2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <math.h>
#include <libm-alias-double.h>
#include <stdint.h>
long int
__lrint (double x)
{
int32_t res;
asm ("fcvt.w.d %0, %1" : "=r" (res) : "f" (x));
return res;
}
libm_alias_double (__lrint, lrint)

31
sysdeps/riscv/rv32/rvd/s_lround.c Normal file
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/* lround(). 32-bit RISC-V (RV32) version.
Copyright (C) 2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <math.h>
#include <libm-alias-double.h>
#include <stdint.h>
long int
__lround (double x)
{
int32_t res;
asm ("fcvt.w.d %0, %1, rmm" : "=r" (res) : "f" (x));
return res;
}
libm_alias_double (__lround, lround)

31
sysdeps/riscv/rv32/rvf/s_lrintf.c Normal file
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/* lrintf(). 32-bit RISC-V (RV32) version.
Copyright (C) 2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <math.h>
#include <libm-alias-float.h>
#include <stdint.h>
long int
__lrintf (float x)
{
int32_t res;
asm ("fcvt.w.s %0, %1" : "=r" (res) : "f" (x));
return res;
}
libm_alias_float (__lrint, lrint)

31
sysdeps/riscv/rv32/rvf/s_lroundf.c Normal file
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/* lroundf(). 32-bit RISC-V (RV32) version.
Copyright (C) 2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <math.h>
#include <libm-alias-float.h>
#include <stdint.h>
long int
__lroundf (float x)
{
int32_t res;
asm ("fcvt.w.s %0, %1, rmm" : "=r" (res) : "f" (x));
return res;
}
libm_alias_float (__lround, lround)