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author | chenglulu <chenglulu@loongson.cn> | 2021-11-27 15:05:47 +0800 |
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committer | Chenghua Xu <paul.hua.gm@gmail.com> | 2022-03-29 17:43:35 +0800 |
commit | bf291a4330d62bbe5b5ab6029d55216362d0dce9 (patch) | |
tree | 6b380b3f047886a07c466e1b7a4ac312e6655275 /libgcc | |
parent | 7e60c24caa1ca27e9360ecea605db219a5c951c1 (diff) | |
download | gcc-bf291a4330d62bbe5b5ab6029d55216362d0dce9.zip gcc-bf291a4330d62bbe5b5ab6029d55216362d0dce9.tar.gz gcc-bf291a4330d62bbe5b5ab6029d55216362d0dce9.tar.bz2 |
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.
Diffstat (limited to 'libgcc')
-rw-r--r-- | libgcc/config.host | 28 | ||||
-rw-r--r-- | libgcc/config/loongarch/crtfastmath.c | 52 | ||||
-rw-r--r-- | libgcc/config/loongarch/linux-unwind.h | 80 | ||||
-rw-r--r-- | libgcc/config/loongarch/sfp-machine.h | 152 | ||||
-rw-r--r-- | libgcc/config/loongarch/t-crtstuff | 5 | ||||
-rw-r--r-- | libgcc/config/loongarch/t-loongarch | 7 | ||||
-rw-r--r-- | libgcc/config/loongarch/t-loongarch64 | 1 | ||||
-rw-r--r-- | libgcc/config/loongarch/t-softfp-tf | 3 | ||||
-rw-r--r-- | libgcc/configure.ac | 2 |
9 files changed, 328 insertions, 2 deletions
diff --git a/libgcc/config.host b/libgcc/config.host index 094fd3a..8c56fca 100644 --- a/libgcc/config.host +++ b/libgcc/config.host @@ -138,6 +138,22 @@ hppa*-*-*) lm32*-*-*) cpu_type=lm32 ;; +loongarch*-*-*) + cpu_type=loongarch + tmake_file="loongarch/t-loongarch" + if test "${libgcc_cv_loongarch_hard_float}" = yes; then + tmake_file="${tmake_file} t-hardfp-sfdf t-hardfp" + else + tmake_file="${tmake_file} t-softfp-sfdf" + fi + if test "${ac_cv_sizeof_long_double}" = 16; then + tmake_file="${tmake_file} loongarch/t-softfp-tf" + fi + if test "${host_address}" = 64; then + tmake_file="${tmake_file} loongarch/t-loongarch64" + fi + tmake_file="${tmake_file} t-softfp" + ;; m32r*-*-*) cpu_type=m32r ;; @@ -925,7 +941,17 @@ lm32-*-rtems*) lm32-*-uclinux*) extra_parts="$extra_parts crtbegin.o crtendS.o crtbeginT.o" tmake_file="lm32/t-lm32 lm32/t-uclinux t-libgcc-pic t-softfp-sfdf t-softfp" - ;; + ;; +loongarch*-*-linux*) + extra_parts="$extra_parts crtfastmath.o" + tmake_file="${tmake_file} t-crtfm loongarch/t-crtstuff" + case ${host} in + *) + tmake_file="${tmake_file} t-slibgcc-libgcc" + ;; + esac + md_unwind_header=loongarch/linux-unwind.h + ;; m32r-*-elf*) tmake_file="$tmake_file m32r/t-m32r t-fdpbit" extra_parts="$extra_parts crtinit.o crtfini.o" diff --git a/libgcc/config/loongarch/crtfastmath.c b/libgcc/config/loongarch/crtfastmath.c new file mode 100644 index 0000000..52b0d6d --- /dev/null +++ b/libgcc/config/loongarch/crtfastmath.c @@ -0,0 +1,52 @@ +/* Copyright (C) 2021-2022 Free Software Foundation, Inc. + Contributed by Loongson Ltd. + Based on MIPS target for GNU compiler. + +This file is part of GCC. + +GCC 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, or (at your option) +any later version. + +GCC 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. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License +and a copy of the GCC Runtime Library Exception along with this +program; see the files COPYING3 and COPYING.RUNTIME respectively. +If not, see <http://www.gnu.org/licenses/>. */ + +#ifdef __loongarch_hard_float + +/* Rounding control. */ +#define _FPU_RC_NEAREST 0x000 /* RECOMMENDED. */ +#define _FPU_RC_ZERO 0x100 +#define _FPU_RC_UP 0x200 +#define _FPU_RC_DOWN 0x300 + +/* Enable interrupts for IEEE exceptions. */ +#define _FPU_IEEE 0x0000001F + +/* Macros for accessing the hardware control word. */ +#define _FPU_GETCW(cw) __asm__ volatile ("movfcsr2gr %0,$r0" : "=r" (cw)) +#define _FPU_SETCW(cw) __asm__ volatile ("movgr2fcsr $r0,%0" : : "r" (cw)) + +static void __attribute__((constructor)) +set_fast_math (void) +{ + unsigned int fcr; + + /* Flush to zero, round to nearest, IEEE exceptions disabled. */ + fcr = _FPU_RC_NEAREST; + + _FPU_SETCW (fcr); +} + +#endif /* __loongarch_hard_float */ diff --git a/libgcc/config/loongarch/linux-unwind.h b/libgcc/config/loongarch/linux-unwind.h new file mode 100644 index 0000000..89c168c --- /dev/null +++ b/libgcc/config/loongarch/linux-unwind.h @@ -0,0 +1,80 @@ +/* DWARF2 EH unwinding support for LoongArch Linux. + Copyright (C) 2021-2022 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC 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, or (at your option) +any later version. + +GCC 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. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +<http://www.gnu.org/licenses/>. */ + +#ifndef inhibit_libc +/* Do code reading to identify a signal frame, and set the frame + state data appropriately. See unwind-dw2.c for the structs. */ + +#include <signal.h> +#include <sys/syscall.h> +#include <sys/ucontext.h> + +#define MD_FALLBACK_FRAME_STATE_FOR loongarch_fallback_frame_state + +static _Unwind_Reason_Code +loongarch_fallback_frame_state (struct _Unwind_Context *context, + _Unwind_FrameState *fs) +{ + u_int32_t *pc = (u_int32_t *) context->ra; + struct sigcontext *sc; + _Unwind_Ptr new_cfa; + int i; + + /* 03822c0b li.d a7, 0x8b (sigreturn) */ + /* 002b0000 syscall 0 */ + if (pc[1] != 0x002b0000) + return _URC_END_OF_STACK; + if (pc[0] == 0x03822c0b) + { + struct rt_sigframe + { + siginfo_t info; + ucontext_t uc; + } *rt_ = context->cfa; + sc = (struct sigcontext *) (void *) &rt_->uc.uc_mcontext; + } + else + return _URC_END_OF_STACK; + + new_cfa = (_Unwind_Ptr) sc; + fs->regs.cfa_how = CFA_REG_OFFSET; + fs->regs.cfa_reg = __LIBGCC_STACK_POINTER_REGNUM__; + fs->regs.cfa_offset = new_cfa - (_Unwind_Ptr) context->cfa; + + for (i = 0; i < 32; i++) + { + fs->regs.reg[i].how = REG_SAVED_OFFSET; + fs->regs.reg[i].loc.offset = (_Unwind_Ptr) & (sc->sc_regs[i]) - new_cfa; + } + + fs->signal_frame = 1; + fs->regs.reg[__LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__].how + = REG_SAVED_VAL_OFFSET; + fs->regs.reg[__LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__].loc.offset + = (_Unwind_Ptr) (sc->sc_pc) - new_cfa; + fs->retaddr_column = __LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__; + + return _URC_NO_REASON; +} +#endif diff --git a/libgcc/config/loongarch/sfp-machine.h b/libgcc/config/loongarch/sfp-machine.h new file mode 100644 index 0000000..c81be71 --- /dev/null +++ b/libgcc/config/loongarch/sfp-machine.h @@ -0,0 +1,152 @@ +/* softfp machine description for LoongArch. + Copyright (C) 2021-2022 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC 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, or (at your option) any later +version. + +GCC 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. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +<http://www.gnu.org/licenses/>. */ + +#ifdef __loongarch64 +#define _FP_W_TYPE_SIZE 64 +#define _FP_W_TYPE unsigned long long +#define _FP_WS_TYPE signed long long +#define _FP_I_TYPE long long + +typedef int TItype __attribute__ ((mode (TI))); +typedef unsigned int UTItype __attribute__ ((mode (TI))); +#define TI_BITS (__CHAR_BIT__ * (int) sizeof (TItype)) + +#define _FP_MUL_MEAT_S(R, X, Y) \ + _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_S, R, X, Y, umul_ppmm) +#define _FP_MUL_MEAT_D(R, X, Y) \ + _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) +#define _FP_MUL_MEAT_Q(R, X, Y) \ + _FP_MUL_MEAT_2_wide (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) + +#define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (S, R, X, Y) +#define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (D, R, X, Y) +#define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_2_udiv (Q, R, X, Y) + +#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) +#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) +#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 +#else +#define _FP_W_TYPE_SIZE 32 +#define _FP_W_TYPE unsigned int +#define _FP_WS_TYPE signed int +#define _FP_I_TYPE int + +#define _FP_MUL_MEAT_S(R, X, Y) \ + _FP_MUL_MEAT_1_wide (_FP_WFRACBITS_S, R, X, Y, umul_ppmm) +#define _FP_MUL_MEAT_D(R, X, Y) \ + _FP_MUL_MEAT_2_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm) +#define _FP_MUL_MEAT_Q(R, X, Y) \ + _FP_MUL_MEAT_4_wide (_FP_WFRACBITS_Q, R, X, Y, umul_ppmm) + +#define _FP_DIV_MEAT_S(R, X, Y) _FP_DIV_MEAT_1_udiv_norm (S, R, X, Y) +#define _FP_DIV_MEAT_D(R, X, Y) _FP_DIV_MEAT_2_udiv (D, R, X, Y) +#define _FP_DIV_MEAT_Q(R, X, Y) _FP_DIV_MEAT_4_udiv (Q, R, X, Y) + +#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) +#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1 +#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1 +#endif + +/* The type of the result of a floating point comparison. This must + match __libgcc_cmp_return__ in GCC for the target. */ +typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__))); +#define CMPtype __gcc_CMPtype + +#define _FP_NANSIGN_S 0 +#define _FP_NANSIGN_D 0 +#define _FP_NANSIGN_Q 0 + +#define _FP_KEEPNANFRACP 1 +#define _FP_QNANNEGATEDP 0 + +/* NaN payloads should be preserved for NAN2008. */ +#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ + do \ + { \ + R##_s = X##_s; \ + _FP_FRAC_COPY_##wc (R, X); \ + R##_c = FP_CLS_NAN; \ + } \ + while (0) + +#ifdef __loongarch_hard_float +#define FP_EX_INVALID 0x100000 +#define FP_EX_DIVZERO 0x080000 +#define FP_EX_OVERFLOW 0x040000 +#define FP_EX_UNDERFLOW 0x020000 +#define FP_EX_INEXACT 0x010000 +#define FP_EX_ALL \ + (FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \ + | FP_EX_INEXACT) + +#define FP_EX_ENABLE_SHIFT 16 +#define FP_EX_CAUSE_SHIFT 8 + +#define FP_RND_NEAREST 0x000 +#define FP_RND_ZERO 0x100 +#define FP_RND_PINF 0x200 +#define FP_RND_MINF 0x300 +#define FP_RND_MASK 0x300 + +#define _FP_DECL_EX \ + unsigned long int _fcsr __attribute__ ((unused)) = FP_RND_NEAREST + +#define FP_INIT_ROUNDMODE \ + do \ + { \ + _fcsr = __builtin_loongarch_movfcsr2gr (0); \ + } \ + while (0) + +#define FP_ROUNDMODE (_fcsr & FP_RND_MASK) + +#define FP_TRAPPING_EXCEPTIONS ((_fcsr << FP_EX_ENABLE_SHIFT) & FP_EX_ALL) + +#define FP_HANDLE_EXCEPTIONS \ + do \ + { \ + _fcsr &= ~(FP_EX_ALL << FP_EX_CAUSE_SHIFT); \ + _fcsr |= _fex | (_fex << FP_EX_CAUSE_SHIFT); \ + __builtin_loongarch_movgr2fcsr (0, _fcsr); \ + } \ + while (0) + +#else +#define FP_EX_INVALID (1 << 4) +#define FP_EX_DIVZERO (1 << 3) +#define FP_EX_OVERFLOW (1 << 2) +#define FP_EX_UNDERFLOW (1 << 1) +#define FP_EX_INEXACT (1 << 0) +#endif + +#define _FP_TININESS_AFTER_ROUNDING 1 + +#define __LITTLE_ENDIAN 1234 + +#define __BYTE_ORDER __LITTLE_ENDIAN + +/* Define ALIASNAME as a strong alias for NAME. */ +#define strong_alias(name, aliasname) _strong_alias (name, aliasname) +#define _strong_alias(name, aliasname) \ + extern __typeof (name) aliasname __attribute__ ((alias (#name))); diff --git a/libgcc/config/loongarch/t-crtstuff b/libgcc/config/loongarch/t-crtstuff new file mode 100644 index 0000000..b8c36eb --- /dev/null +++ b/libgcc/config/loongarch/t-crtstuff @@ -0,0 +1,5 @@ +# -fasynchronous-unwind-tables is on by default for LoongArch. +# We turn it off for crt*.o because it would make __EH_FRAME_BEGIN__ point +# to .eh_frame data from crtbeginT.o instead of the user-defined object +# during static linking. +CRTSTUFF_T_CFLAGS += -fno-omit-frame-pointer -fno-asynchronous-unwind-tables diff --git a/libgcc/config/loongarch/t-loongarch b/libgcc/config/loongarch/t-loongarch new file mode 100644 index 0000000..2a7dbf6 --- /dev/null +++ b/libgcc/config/loongarch/t-loongarch @@ -0,0 +1,7 @@ +LIB2_SIDITI_CONV_FUNCS = yes + +softfp_float_modes := +softfp_int_modes := si di +softfp_extensions := +softfp_truncations := +softfp_exclude_libgcc2 := n diff --git a/libgcc/config/loongarch/t-loongarch64 b/libgcc/config/loongarch/t-loongarch64 new file mode 100644 index 0000000..a1e3513 --- /dev/null +++ b/libgcc/config/loongarch/t-loongarch64 @@ -0,0 +1 @@ +softfp_int_modes += ti diff --git a/libgcc/config/loongarch/t-softfp-tf b/libgcc/config/loongarch/t-softfp-tf new file mode 100644 index 0000000..306677b --- /dev/null +++ b/libgcc/config/loongarch/t-softfp-tf @@ -0,0 +1,3 @@ +softfp_float_modes += tf +softfp_extensions += sftf dftf +softfp_truncations += tfsf tfdf diff --git a/libgcc/configure.ac b/libgcc/configure.ac index 6f0b67c..2fc9d5d 100644 --- a/libgcc/configure.ac +++ b/libgcc/configure.ac @@ -324,7 +324,7 @@ AC_CACHE_CHECK([whether assembler supports CFI directives], [libgcc_cv_cfi], # word size rather than the address size. cat > conftest.c <<EOF #if defined(__x86_64__) || (!defined(__i386__) && defined(__LP64__)) \ - || defined(__mips64) + || defined(__mips64) || defined(__loongarch64) host_address=64 #else host_address=32 |