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LoongArch: Add soft float support.

This commit is contained in:
caiyinyu 2022-08-22 16:00:51 +08:00
parent 1e903124ce
commit 930993921f
17 changed files with 169 additions and 20 deletions
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4
scripts/build-many-glibcs.py
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@ -222,6 +222,10 @@ class Context(object):
os_name='linux-gnu',
variant='lp64d',
gcc_cfg=['--with-abi=lp64d','--disable-multilib'])
self.add_config(arch='loongarch64',
os_name='linux-gnu',
variant='lp64s',
gcc_cfg=['--with-abi=lp64s','--disable-multilib'])
self.add_config(arch='m68k',
os_name='linux-gnu',
gcc_cfg=['--disable-multilib'])

8
sysdeps/loongarch/Makefile
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@ -5,11 +5,3 @@ endif
# LoongArch's assembler also needs to know about PIC as it changes the
# definition of some assembler macros.
ASFLAGS-.os += $(pic-ccflag)
abi-variants := lp64
ifeq (,$(filter $(default-abi),$(abi-variants)))
$(error Unknown ABI $(default-abi), must be one of $(abi-variants))
endif
abi-lp64-condition := defined __loongarch_lp64

2
sysdeps/loongarch/__longjmp.S
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@ -41,6 +41,7 @@ ENTRY (__longjmp)
REG_L s7, a0, 11*SZREG
REG_L s8, a0, 12*SZREG
#ifndef __loongarch_soft_float
FREG_L $f24, a0, 13*SZREG + 0*SZFREG
FREG_L $f25, a0, 13*SZREG + 1*SZFREG
FREG_L $f26, a0, 13*SZREG + 2*SZFREG
@ -49,6 +50,7 @@ ENTRY (__longjmp)
FREG_L $f29, a0, 13*SZREG + 5*SZFREG
FREG_L $f30, a0, 13*SZREG + 6*SZFREG
FREG_L $f31, a0, 13*SZREG + 7*SZFREG
#endif
sltui a0,a1,1
ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1

3
sysdeps/loongarch/bits/setjmp.h
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@ -31,8 +31,11 @@ typedef struct __jmp_buf_internal_tag
long int __fp;
/* Callee-saved registers. */
long int __regs[9];
#ifndef __loongarch_soft_float
/* Callee-saved floating point registers. */
double __fpregs[8];
#endif
} __jmp_buf[1];

11
sysdeps/loongarch/dl-trampoline.S
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@ -21,8 +21,11 @@
/* Assembler veneer called from the PLT header code for lazy loading.
The PLT header passes its own args in t0-t2. */
# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK))
#ifdef __loongarch_soft_float
#define FRAME_SIZE (-((-10 * SZREG) & ALMASK))
#else
#define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK))
#endif
ENTRY (_dl_runtime_resolve)
@ -39,6 +42,7 @@ ENTRY (_dl_runtime_resolve)
REG_S a6, sp, 7*SZREG
REG_S a7, sp, 8*SZREG
#ifndef __loongarch_soft_float
FREG_S fa0, sp, 10*SZREG + 0*SZFREG
FREG_S fa1, sp, 10*SZREG + 1*SZFREG
FREG_S fa2, sp, 10*SZREG + 2*SZFREG
@ -47,6 +51,7 @@ ENTRY (_dl_runtime_resolve)
FREG_S fa5, sp, 10*SZREG + 5*SZFREG
FREG_S fa6, sp, 10*SZREG + 6*SZFREG
FREG_S fa7, sp, 10*SZREG + 7*SZFREG
#endif
/* Update .got.plt and obtain runtime address of callee */
SLLI a1, t1, 1
@ -67,6 +72,7 @@ ENTRY (_dl_runtime_resolve)
REG_L a6, sp, 7*SZREG
REG_L a7, sp, 8*SZREG
#ifndef __loongarch_soft_float
FREG_L fa0, sp, 10*SZREG + 0*SZFREG
FREG_L fa1, sp, 10*SZREG + 1*SZFREG
FREG_L fa2, sp, 10*SZREG + 2*SZFREG
@ -75,6 +81,7 @@ ENTRY (_dl_runtime_resolve)
FREG_L fa5, sp, 10*SZREG + 5*SZFREG
FREG_L fa6, sp, 10*SZREG + 6*SZFREG
FREG_L fa7, sp, 10*SZREG + 7*SZFREG
#endif
ADDI sp, sp, FRAME_SIZE

13
sysdeps/loongarch/fpu_control.h
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@ -51,6 +51,17 @@
#include <features.h>
#ifdef __loongarch_soft_float
#define _FPU_RESERVED 0xffffffff
#define _FPU_DEFAULT 0x00000000
typedef unsigned int fpu_control_t;
#define _FPU_GETCW(cw) (cw) = 0
#define _FPU_SETCW(cw) (void) (cw)
extern fpu_control_t __fpu_control;
#else /* __loongarch_soft_float */
/* Masks for interrupts. */
#define _FPU_MASK_V 0x10 /* Invalid operation */
#define _FPU_MASK_Z 0x08 /* Division by zero */
@ -86,4 +97,6 @@ extern void __loongarch_fpu_setcw (fpu_control_t) __THROW;
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
#endif /* __loongarch_soft_float */
#endif /* fpu_control.h */

1
sysdeps/loongarch/nofpu/Implies Normal file
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@ -0,0 +1 @@
ieee754/soft-fp

28
sysdeps/loongarch/nofpu/math-tests-exceptions.h Normal file
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@ -0,0 +1,28 @@
/* Configuration for math tests: support for exceptions.
Copyright (C) 2022 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/>. */
#ifndef LOONGARCH_NOFPU_MATH_TESTS_EXCEPTIONS_H
#define LOONGARCH_NOFPU_MATH_TESTS_EXCEPTIONS_H 1
/* We support setting floating-point exception flags on hard-float
targets. These are not supported on soft-float targets. */
#define EXCEPTION_TESTS_float 0
#define EXCEPTION_TESTS_double 0
#define EXCEPTION_TESTS_long_double 0
#endif /* math-tests-exceptions.h. */

27
sysdeps/loongarch/nofpu/math-tests-rounding.h Normal file
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@ -0,0 +1,27 @@
/* Configuration for math tests: rounding mode support.
Copyright (C) 2022 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/>. */
#ifndef LOONGARCH_NOFPU_MATH_TESTS_ROUNDING_H
#define LOONGARCH_NOFPU_MATH_TESTS_ROUNDING_H 1
/* On soft-float targets we only support the "to nearest" rounding mode. */
#define ROUNDING_TESTS_float(MODE) ((MODE) == FE_TONEAREST)
#define ROUNDING_TESTS_double(MODE) ((MODE) == FE_TONEAREST)
#define ROUNDING_TESTS_long_double(MODE) ((MODE) == FE_TONEAREST)
#endif /* math-tests-rounding.h. */

1
sysdeps/loongarch/preconfigure
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@ -12,7 +12,6 @@ loongarch*)
case "$float_abi" in
soft)
abi_flen=0
as_fn_error 1 "loongarch does not yet support soft floating-point ABI!!" "$LINENO" 5
;;
single)
as_fn_error 1 "glibc does not yet support the single floating-point ABI!!" "$LINENO" 5

1
sysdeps/loongarch/preconfigure.ac
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@ -12,7 +12,6 @@ loongarch*)
case "$float_abi" in
soft)
abi_flen=0
AC_MSG_ERROR([loongarch does not yet support soft floating-point ABI!!], 1)
;;
single)
AC_MSG_ERROR([glibc does not yet support the single floating-point ABI!!], 1)

2
sysdeps/loongarch/setjmp.S
View File

@ -50,6 +50,7 @@ ENTRY (__sigsetjmp)
REG_S s7, a0, 11*SZREG
REG_S s8, a0, 12*SZREG
#ifndef __loongarch_soft_float
FREG_S $f24, a0, 13*SZREG + 0*SZFREG
FREG_S $f25, a0, 13*SZREG + 1*SZFREG
FREG_S $f26, a0, 13*SZREG + 2*SZFREG
@ -58,6 +59,7 @@ ENTRY (__sigsetjmp)
FREG_S $f29, a0, 13*SZREG + 5*SZFREG
FREG_S $f30, a0, 13*SZREG + 6*SZFREG
FREG_S $f31, a0, 13*SZREG + 7*SZFREG
#endif
#if !IS_IN (libc) && IS_IN(rtld)
li.w v0, 0

9
sysdeps/unix/sysv/linux/loongarch/Makefile
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@ -1,3 +1,12 @@
ifeq ($(subdir),stdlib)
gen-as-const-headers += ucontext_i.sym
endif
abi-variants := lp64s lp64d
ifeq (,$(filter $(default-abi),$(abi-variants)))
$(error Unknown ABI $(default-abi), must be one of $(abi-variants))
endif
abi-lp64s-condition := __WORDSIZE == 64 && defined __loongarch_soft_float
abi-lp64d-condition := __WORDSIZE == 64 && defined __loongarch_double_float

53
sysdeps/unix/sysv/linux/loongarch/configure vendored
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@ -151,11 +151,56 @@ if test $libc_cv_loongarch_int_abi = no; then
as_fn_error $? "Unable to determine integer ABI" "$LINENO" 5
fi
config_vars="$config_vars
default-abi = $libc_cv_loongarch_int_abi"
libc_cv_loongarch_float_abi=no
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#ifdef __loongarch_double_float
yes
#endif
case $libc_cv_loongarch_int_abi in
lp64)
_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
$EGREP "yes" >/dev/null 2>&1; then :
libc_cv_loongarch_float_abi=d
fi
rm -f conftest*
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#ifdef __loongarch_soft_float
yes
#endif
_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
$EGREP "yes" >/dev/null 2>&1; then :
libc_cv_loongarch_float_abi=s
fi
rm -f conftest*
if test "$libc_cv_loongarch_float_abi" = no; then
as_fn_error $? "Unable to determine floating-point ABI" "$LINENO" 5
fi
config_vars="$config_vars
default-abi = $libc_cv_loongarch_int_abi$libc_cv_loongarch_float_abi"
case $libc_cv_loongarch_int_abi$libc_cv_loongarch_float_abi in
lp64s)
test -n "$libc_cv_slibdir" ||
case "$prefix" in
/usr | /usr/)
libc_cv_slibdir='/lib64/sf'
libc_cv_rtlddir='/lib64'
if test "$libdir" = '${exec_prefix}/lib'; then
libdir='${exec_prefix}/lib64/sf';
# Locale data can be shared between 32-bit and 64-bit libraries.
libc_cv_complocaledir='${exec_prefix}/lib/locale'
fi
;;
esac
;;
lp64d)
test -n "$libc_cv_slibdir" ||
case "$prefix" in
/usr | /usr/)

22
sysdeps/unix/sysv/linux/loongarch/configure.ac
View File

@ -11,10 +11,26 @@ if test $libc_cv_loongarch_int_abi = no; then
AC_MSG_ERROR([Unable to determine integer ABI])
fi
LIBC_CONFIG_VAR([default-abi], [$libc_cv_loongarch_int_abi])
libc_cv_loongarch_float_abi=no
AC_EGREP_CPP(yes, [#ifdef __loongarch_double_float
yes
#endif
],libc_cv_loongarch_float_abi=d)
AC_EGREP_CPP(yes, [#ifdef __loongarch_soft_float
yes
#endif
],libc_cv_loongarch_float_abi=s)
if test "$libc_cv_loongarch_float_abi" = no; then
AC_MSG_ERROR([Unable to determine floating-point ABI])
fi
case $libc_cv_loongarch_int_abi in
lp64)
LIBC_CONFIG_VAR([default-abi], [$libc_cv_loongarch_int_abi$libc_cv_loongarch_float_abi])
case $libc_cv_loongarch_int_abi$libc_cv_loongarch_float_abi in
lp64s)
LIBC_SLIBDIR_RTLDDIR([lib64/sf], [lib64])
;;
lp64d)
LIBC_SLIBDIR_RTLDDIR([lib64], [lib64])
;;
esac

2
sysdeps/unix/sysv/linux/loongarch/ldd-rewrite.sed
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@ -1 +1 @@
s_^\(RTLDLIST=\)\(.*lib\)\(\|64\|32\)\(/[^/]*\)\(-loongarch\)\(64\|32\)\(\.so\.[0-9.]*\)[[:blank:]]*$_\1"\2\4\7 \264\4-loongarch64\7 \232\4-loongarch32\7"_
s_^\(RTLDLIST=\)\(.*lib\)\(\|64\|32\)\(/ld-linux-loongarch-\)\(lp\|ilp\)\(64\|32\)\(d\|s\)\(\.so\.[0-9.]*\)[[:blank:]]*$_\1"\264\4lp64d\8 \264\4lp64s\8"_

2
sysdeps/unix/sysv/linux/loongarch/shlib-versions
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@ -2,6 +2,8 @@ DEFAULT GLIBC_2.36
%if LOONGARCH_ABI_GRLEN == 64 && LOONGARCH_ABI_FRLEN == 64
ld=ld-linux-loongarch-lp64d.so.1
%elif LOONGARCH_ABI_GRLEN == 64 && LOONGARCH_ABI_FRLEN == 0
ld=ld-linux-loongarch-lp64s.so.1
%else
%error cannot determine ABI
%endif