LoongArch Port: libgcc
2022-03-29 Chenghua Xu <xuchenghua@loongson.cn> Lulu Cheng <chenglulu@loongson.cn> libgcc/ChangeLog: * config/loongarch/crtfastmath.c: New file. * config/loongarch/linux-unwind.h: Like wise. * config/loongarch/sfp-machine.h: Like wise. * config/loongarch/t-crtstuff: Like wise. * config/loongarch/t-loongarch: Like wise. * config/loongarch/t-loongarch64: Like wise. * config/loongarch/t-softfp-tf: Like wise. * config.host: Add LoongArch tuples. * configure.ac: Add LoongArch support.
This commit is contained in:
chenglulu
Chenghua Xu
parent
7e60c24caa
commit
bf291a4330
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@ -138,6 +138,22 @@ hppa*-*-*)
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lm32*-*-*)
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cpu_type=lm32
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;;
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loongarch*-*-*)
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cpu_type=loongarch
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tmake_file="loongarch/t-loongarch"
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if test "${libgcc_cv_loongarch_hard_float}" = yes; then
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tmake_file="${tmake_file} t-hardfp-sfdf t-hardfp"
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else
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tmake_file="${tmake_file} t-softfp-sfdf"
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fi
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if test "${ac_cv_sizeof_long_double}" = 16; then
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tmake_file="${tmake_file} loongarch/t-softfp-tf"
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fi
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if test "${host_address}" = 64; then
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tmake_file="${tmake_file} loongarch/t-loongarch64"
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fi
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tmake_file="${tmake_file} t-softfp"
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;;
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m32r*-*-*)
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cpu_type=m32r
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;;
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@ -925,7 +941,17 @@ lm32-*-rtems*)
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lm32-*-uclinux*)
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extra_parts="$extra_parts crtbegin.o crtendS.o crtbeginT.o"
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tmake_file="lm32/t-lm32 lm32/t-uclinux t-libgcc-pic t-softfp-sfdf t-softfp"
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;;
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;;
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loongarch*-*-linux*)
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extra_parts="$extra_parts crtfastmath.o"
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tmake_file="${tmake_file} t-crtfm loongarch/t-crtstuff"
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case ${host} in
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*)
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tmake_file="${tmake_file} t-slibgcc-libgcc"
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;;
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esac
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md_unwind_header=loongarch/linux-unwind.h
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;;
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m32r-*-elf*)
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tmake_file="$tmake_file m32r/t-m32r t-fdpbit"
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extra_parts="$extra_parts crtinit.o crtfini.o"
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@ -0,0 +1,52 @@
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/* Copyright (C) 2021-2022 Free Software Foundation, Inc.
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Contributed by Loongson Ltd.
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Based on MIPS target for GNU compiler.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License
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and a copy of the GCC Runtime Library Exception along with this
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program; see the files COPYING3 and COPYING.RUNTIME respectively.
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If not, see <http://www.gnu.org/licenses/>. */
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#ifdef __loongarch_hard_float
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/* Rounding control. */
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#define _FPU_RC_NEAREST 0x000 /* RECOMMENDED. */
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#define _FPU_RC_ZERO 0x100
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#define _FPU_RC_UP 0x200
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#define _FPU_RC_DOWN 0x300
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/* Enable interrupts for IEEE exceptions. */
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#define _FPU_IEEE 0x0000001F
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/* Macros for accessing the hardware control word. */
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#define _FPU_GETCW(cw) __asm__ volatile ("movfcsr2gr %0,$r0" : "=r" (cw))
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#define _FPU_SETCW(cw) __asm__ volatile ("movgr2fcsr $r0,%0" : : "r" (cw))
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static void __attribute__((constructor))
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set_fast_math (void)
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{
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unsigned int fcr;
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/* Flush to zero, round to nearest, IEEE exceptions disabled. */
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fcr = _FPU_RC_NEAREST;
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_FPU_SETCW (fcr);
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}
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#endif /* __loongarch_hard_float */
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@ -0,0 +1,80 @@
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/* DWARF2 EH unwinding support for LoongArch Linux.
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Copyright (C) 2021-2022 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef inhibit_libc
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/* Do code reading to identify a signal frame, and set the frame
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state data appropriately. See unwind-dw2.c for the structs. */
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#include <signal.h>
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#include <sys/syscall.h>
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#include <sys/ucontext.h>
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#define MD_FALLBACK_FRAME_STATE_FOR loongarch_fallback_frame_state
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static _Unwind_Reason_Code
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loongarch_fallback_frame_state (struct _Unwind_Context *context,
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_Unwind_FrameState *fs)
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{
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u_int32_t *pc = (u_int32_t *) context->ra;
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struct sigcontext *sc;
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_Unwind_Ptr new_cfa;
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int i;
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/* 03822c0b li.d a7, 0x8b (sigreturn) */
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/* 002b0000 syscall 0 */
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if (pc[1] != 0x002b0000)
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return _URC_END_OF_STACK;
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if (pc[0] == 0x03822c0b)
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{
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struct rt_sigframe
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{
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siginfo_t info;
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ucontext_t uc;
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} *rt_ = context->cfa;
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sc = (struct sigcontext *) (void *) &rt_->uc.uc_mcontext;
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}
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else
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return _URC_END_OF_STACK;
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new_cfa = (_Unwind_Ptr) sc;
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fs->regs.cfa_how = CFA_REG_OFFSET;
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fs->regs.cfa_reg = __LIBGCC_STACK_POINTER_REGNUM__;
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fs->regs.cfa_offset = new_cfa - (_Unwind_Ptr) context->cfa;
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for (i = 0; i < 32; i++)
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{
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fs->regs.reg[i].how = REG_SAVED_OFFSET;
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fs->regs.reg[i].loc.offset = (_Unwind_Ptr) & (sc->sc_regs[i]) - new_cfa;
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}
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fs->signal_frame = 1;
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fs->regs.reg[__LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__].how
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= REG_SAVED_VAL_OFFSET;
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fs->regs.reg[__LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__].loc.offset
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= (_Unwind_Ptr) (sc->sc_pc) - new_cfa;
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fs->retaddr_column = __LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__;
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return _URC_NO_REASON;
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}
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#endif
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@ -0,0 +1,152 @@
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/* softfp machine description for LoongArch.
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Copyright (C) 2021-2022 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifdef __loongarch64
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#define _FP_W_TYPE_SIZE 64
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#define _FP_W_TYPE unsigned long long
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#define _FP_WS_TYPE signed long long
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#define _FP_I_TYPE long long
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typedef int TItype __attribute__ ((mode (TI)));
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typedef unsigned int UTItype __attribute__ ((mode (TI)));
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#define TI_BITS (__CHAR_BIT__ * (int) sizeof (TItype))
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#define _FP_MUL_MEAT_S(R, X, Y) \
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_FP_MUL_MEAT_1_wide (_FP_WFRACBITS_S, R, X, Y, umul_ppmm)
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#define _FP_MUL_MEAT_D(R, X, Y) \
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_FP_MUL_MEAT_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm)
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#define _FP_MUL_MEAT_Q(R, X, Y) \
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_FP_MUL_MEAT_2_wide (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm)
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#define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (S, R, X, Y)
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#define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (D, R, X, Y)
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#define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_2_udiv (Q, R, X, Y)
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#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1)
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#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1)
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#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1
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#else
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#define _FP_W_TYPE_SIZE 32
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#define _FP_W_TYPE unsigned int
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#define _FP_WS_TYPE signed int
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#define _FP_I_TYPE int
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#define _FP_MUL_MEAT_S(R, X, Y) \
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_FP_MUL_MEAT_1_wide (_FP_WFRACBITS_S, R, X, Y, umul_ppmm)
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#define _FP_MUL_MEAT_D(R, X, Y) \
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_FP_MUL_MEAT_2_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm)
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#define _FP_MUL_MEAT_Q(R, X, Y) \
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_FP_MUL_MEAT_4_wide (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm)
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#define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (S, R, X, Y)
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#define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_2_udiv (D, R, X, Y)
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#define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_4_udiv (Q, R, X, Y)
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#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1)
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#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1
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#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
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#endif
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/* The type of the result of a floating point comparison. This must
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match __libgcc_cmp_return__ in GCC for the target. */
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typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
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#define CMPtype __gcc_CMPtype
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#define _FP_NANSIGN_S 0
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#define _FP_NANSIGN_D 0
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#define _FP_NANSIGN_Q 0
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#define _FP_KEEPNANFRACP 1
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#define _FP_QNANNEGATEDP 0
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/* NaN payloads should be preserved for NAN2008. */
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#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
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do \
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{ \
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R##_s = X##_s; \
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_FP_FRAC_COPY_##wc (R, X); \
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R##_c = FP_CLS_NAN; \
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} \
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while (0)
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#ifdef __loongarch_hard_float
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#define FP_EX_INVALID 0x100000
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#define FP_EX_DIVZERO 0x080000
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#define FP_EX_OVERFLOW 0x040000
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#define FP_EX_UNDERFLOW 0x020000
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#define FP_EX_INEXACT 0x010000
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#define FP_EX_ALL \
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(FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \
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| FP_EX_INEXACT)
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#define FP_EX_ENABLE_SHIFT 16
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#define FP_EX_CAUSE_SHIFT 8
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#define FP_RND_NEAREST 0x000
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#define FP_RND_ZERO 0x100
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#define FP_RND_PINF 0x200
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#define FP_RND_MINF 0x300
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#define FP_RND_MASK 0x300
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#define _FP_DECL_EX \
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unsigned long int _fcsr __attribute__ ((unused)) = FP_RND_NEAREST
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#define FP_INIT_ROUNDMODE \
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do \
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{ \
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_fcsr = __builtin_loongarch_movfcsr2gr (0); \
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} \
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while (0)
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#define FP_ROUNDMODE (_fcsr & FP_RND_MASK)
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#define FP_TRAPPING_EXCEPTIONS ((_fcsr << FP_EX_ENABLE_SHIFT) & FP_EX_ALL)
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#define FP_HANDLE_EXCEPTIONS \
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do \
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{ \
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_fcsr &= ~(FP_EX_ALL << FP_EX_CAUSE_SHIFT); \
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_fcsr |= _fex | (_fex << FP_EX_CAUSE_SHIFT); \
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__builtin_loongarch_movgr2fcsr (0, _fcsr); \
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} \
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while (0)
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#else
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#define FP_EX_INVALID (1 << 4)
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#define FP_EX_DIVZERO (1 << 3)
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#define FP_EX_OVERFLOW (1 << 2)
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#define FP_EX_UNDERFLOW (1 << 1)
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#define FP_EX_INEXACT (1 << 0)
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#endif
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#define _FP_TININESS_AFTER_ROUNDING 1
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#define __LITTLE_ENDIAN 1234
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#define __BYTE_ORDER __LITTLE_ENDIAN
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/* Define ALIASNAME as a strong alias for NAME. */
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#define strong_alias(name, aliasname) _strong_alias (name, aliasname)
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#define _strong_alias(name, aliasname) \
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extern __typeof (name) aliasname __attribute__ ((alias (#name)));
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@ -0,0 +1,5 @@
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# -fasynchronous-unwind-tables is on by default for LoongArch.
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# We turn it off for crt*.o because it would make __EH_FRAME_BEGIN__ point
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# to .eh_frame data from crtbeginT.o instead of the user-defined object
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# during static linking.
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CRTSTUFF_T_CFLAGS += -fno-omit-frame-pointer -fno-asynchronous-unwind-tables
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@ -0,0 +1,7 @@
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LIB2_SIDITI_CONV_FUNCS = yes
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softfp_float_modes :=
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softfp_int_modes := si di
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softfp_extensions :=
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softfp_truncations :=
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softfp_exclude_libgcc2 := n
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@ -0,0 +1 @@
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softfp_int_modes += ti
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@ -0,0 +1,3 @@
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softfp_float_modes += tf
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softfp_extensions += sftf dftf
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softfp_truncations += tfsf tfdf
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@ -324,7 +324,7 @@ AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi],
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# word size rather than the address size.
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cat > conftest.c <<EOF
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#if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__)) \
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|| defined(__mips64)
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|| defined(__mips64) || defined(__loongarch64)
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host_address=64
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#else
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host_address=32
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