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RISC-V: Support the 32-bit ABI implementation

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This patch adds the ABI implementation for 32-bit RISC-V.  It contains
the Linux-specific and RISC-V architecture code.

Reviewed-by: Maciej W. Rozycki <macro@wdc.com>
This commit is contained in:
Alistair Francis 2020-02-10 10:36:21 -08:00
parent 07598d7600
commit 5b6113d62e
7 changed files with 146 additions and 22 deletions
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9
sysdeps/riscv/bits/wordsize.h
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@ -22,8 +22,9 @@
# error unsupported ABI
#endif
#if __riscv_xlen == 64
# define __WORDSIZE_TIME64_COMPAT32 1
#else
# error "rv32i-based targets are not supported"
#define __WORDSIZE_TIME64_COMPAT32 1
#if __WORDSIZE == 32
# define __WORDSIZE32_SIZE_ULONG 0
# define __WORDSIZE32_PTRDIFF_LONG 0
#endif

26
sysdeps/riscv/nptl/bits/pthreadtypes-arch.h
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@ -21,18 +21,22 @@
#include <bits/endian.h>
#if __riscv_xlen == 64
# define __SIZEOF_PTHREAD_ATTR_T 56
# define __SIZEOF_PTHREAD_MUTEX_T 40
# define __SIZEOF_PTHREAD_MUTEXATTR_T 4
# define __SIZEOF_PTHREAD_COND_T 48
# define __SIZEOF_PTHREAD_CONDATTR_T 4
# define __SIZEOF_PTHREAD_RWLOCK_T 56
# define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
# define __SIZEOF_PTHREAD_BARRIER_T 32
# define __SIZEOF_PTHREAD_BARRIERATTR_T 4
#define __SIZEOF_PTHREAD_MUTEXATTR_T 4
#define __SIZEOF_PTHREAD_COND_T 48
#define __SIZEOF_PTHREAD_CONDATTR_T 4
#define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
#define __SIZEOF_PTHREAD_BARRIERATTR_T 4
#if __WORDSIZE == 64
# define __SIZEOF_PTHREAD_ATTR_T 56
# define __SIZEOF_PTHREAD_MUTEX_T 40
# define __SIZEOF_PTHREAD_RWLOCK_T 56
# define __SIZEOF_PTHREAD_BARRIER_T 32
#else
# error "rv32i-based systems are not supported"
# define __SIZEOF_PTHREAD_ATTR_T 32
# define __SIZEOF_PTHREAD_MUTEX_T 32
# define __SIZEOF_PTHREAD_RWLOCK_T 48
# define __SIZEOF_PTHREAD_BARRIER_T 20
#endif
#define __LOCK_ALIGNMENT

27
sysdeps/riscv/nptl/bits/struct_rwlock.h
View File

@ -15,7 +15,7 @@
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
<https://www.gnu.org/licenses/>. */
#ifndef _RWLOCK_INTERNAL_H
#define _RWLOCK_INTERNAL_H
@ -32,14 +32,37 @@ struct __pthread_rwlock_arch_t
unsigned int __writers_futex;
unsigned int __pad3;
unsigned int __pad4;
#if __WORDSIZE == 64
int __cur_writer;
int __shared;
unsigned long int __pad1;
unsigned long int __pad2;
unsigned int __flags;
#else
# if __BYTE_ORDER == __BIG_ENDIAN
unsigned char __pad1;
unsigned char __pad2;
unsigned char __shared;
unsigned char __flags;
# else
unsigned char __flags;
unsigned char __shared;
unsigned char __pad1;
unsigned char __pad2;
# endif
int __cur_writer;
#endif
};
#define __PTHREAD_RWLOCK_INITIALIZER(__flags) \
#if __WORDSIZE == 64
# define __PTHREAD_RWLOCK_INITIALIZER(__flags) \
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, __flags
#elif __BYTE_ORDER == __BIG_ENDIAN
# define __PTHREAD_RWLOCK_INITIALIZER(__flags) \
0, 0, 0, 0, 0, 0, 0, 0, 0, __flags, 0
#else
# define __PTHREAD_RWLOCK_INITIALIZER(__flags) \
0, 0, 0, 0, 0, 0, __flags, 0, 0, 0, 0
#endif
#endif

17
sysdeps/riscv/nptl/pthread-offsets.h
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@ -1,3 +1,16 @@
#define __PTHREAD_MUTEX_KIND_OFFSET 16
#if __WORDSIZE == 64
# define __PTHREAD_MUTEX_KIND_OFFSET 16
#else
# define __PTHREAD_MUTEX_KIND_OFFSET 12
#endif
#define __PTHREAD_RWLOCK_FLAGS_OFFSET 48
#if __WORDSIZE == 64
# define __PTHREAD_RWLOCK_FLAGS_OFFSET 48
#else
# if __BYTE_ORDER == __BIG_ENDIAN
# define __PTHREAD_RWLOCK_FLAGS_OFFSET 27
# else
# define __PTHREAD_RWLOCK_FLAGS_OFFSET 24
# endif
#endif

27
sysdeps/riscv/sfp-machine.h
View File

@ -22,7 +22,32 @@
#if __riscv_xlen == 32
# error "rv32i-based targets are not supported"
# define _FP_W_TYPE_SIZE 32
# define _FP_W_TYPE unsigned long
# define _FP_WS_TYPE signed long
# define _FP_I_TYPE long
# 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_MUL_MEAT_DW_S(R, X, Y) \
_FP_MUL_MEAT_DW_1_wide (_FP_WFRACBITS_S, R, X, Y, umul_ppmm)
# define _FP_MUL_MEAT_DW_D(R, X, Y) \
_FP_MUL_MEAT_DW_2_wide (_FP_WFRACBITS_D, R, X, Y, umul_ppmm)
# define _FP_MUL_MEAT_DW_Q(R, X, Y) \
_FP_MUL_MEAT_DW_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
# define _FP_NANFRAC_D _FP_QNANBIT_D, 0
# define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0, 0, 0
#else

7
sysdeps/riscv/sys/asm.h
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@ -22,11 +22,14 @@
/* Macros to handle different pointer/register sizes for 32/64-bit code. */
#if __riscv_xlen == 64
# define PTRLOG 3
# define SZREG 8
# define SZREG 8
# define REG_S sd
# define REG_L ld
#elif __riscv_xlen == 32
# error "rv32i-based targets are not supported"
# define PTRLOG 2
# define SZREG 4
# define REG_S sw
# define REG_L lw
#else
# error __riscv_xlen must equal 32 or 64
#endif

55
sysdeps/unix/sysv/linux/riscv/jmp_buf-macros.h Normal file
View File

@ -0,0 +1,55 @@
/* The jump buffer constants for RISC-V.
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/>. */
/* Produced by this program:
#include <stdio.h>
#include <unistd.h>
#include <setjmp.h>
#include <stddef.h>
int main (int argc, char **argv)
{
printf ("#define JMP_BUF_SIZE %d\n", sizeof (jmp_buf));
printf ("#define JMP_BUF_ALIGN %d\n", __alignof__ (jmp_buf));
printf ("#define SIGJMP_BUF_SIZE %d\n", sizeof (sigjmp_buf));
printf ("#define SIGJMP_BUF_ALIGN %d\n", __alignof__ (sigjmp_buf));
printf ("#define MASK_WAS_SAVED_OFFSET %d\n",
offsetof (struct __jmp_buf_tag, __mask_was_saved));
printf ("#define SAVED_MASK_OFFSET %d\n",
offsetof (struct __jmp_buf_tag, __saved_mask));
} */
#if defined __riscv_float_abi_soft
# define JMP_BUF_SIZE 188
# define JMP_BUF_ALIGN 4
# define SIGJMP_BUF_SIZE 188
# define SIGJMP_BUF_ALIGN 4
# define MASK_WAS_SAVED_OFFSET 56
# define SAVED_MASK_OFFSET 60
#elif defined __riscv_float_abi_double
# define JMP_BUF_SIZE 288
# define JMP_BUF_ALIGN 8
# define SIGJMP_BUF_SIZE 288
# define SIGJMP_BUF_ALIGN 8
# define MASK_WAS_SAVED_OFFSET 152
# define SAVED_MASK_OFFSET 156
#else
# error "Unknown RISC-V floating-point ABI"
#endif