[RFC v4 16/24] RISC-V: The ABI implementation for the 32-bit
Alistair Francis
alistair.francis@wdc.com
Sat Aug 10 01:03:00 GMT 2019
From: Zong Li <zongbox@gmail.com>
This patch adds the ABI implementation about 32 bit version. It contains
the Linux-specific and RISC-V architecture code, I've collected here.
2018-11-29 Zong Li <zong@andestech.com>
* sysdeps/riscv/bits/wordsize.h: Supprt rv32.
* sysdeps/riscv/nptl/bits/pthreadtypes-arch.h: Likewise.
* sysdeps/riscv/sfp-machine.h: Likewise.
* sysdeps/riscv/sys/asm.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/rv32/jmp_buf-macros.h: New file.
[ Changes by AF:
- Remove lock64.c
]
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
ChangeLog | 8 +++
sysdeps/riscv/bits/wordsize.h | 4 +-
sysdeps/riscv/nptl/bits/pthreadtypes-arch.h | 25 ++++++++-
sysdeps/riscv/sfp-machine.h | 27 +++++++++-
sysdeps/riscv/sys/asm.h | 5 +-
.../sysv/linux/riscv/rv32/jmp_buf-macros.h | 53 +++++++++++++++++++
6 files changed, 118 insertions(+), 4 deletions(-)
create mode 100644 sysdeps/unix/sysv/linux/riscv/rv32/jmp_buf-macros.h
diff --git a/ChangeLog b/ChangeLog
index cc9526ee7ed..4faa11ab454 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1438,6 +1438,14 @@
* sysdeps/unix/sysv/linux/riscv/ldconfig.h (LD_SO_ABI): Support rv32.
* sysdeps/unix/sysv/linux/riscv/dl-cache.h (add_system_dir): Add
libraries path for rv32.
+ * sysdeps/unix/sysv/linux/riscv/ldconfig.h (LD_SO_ABI): Support rv32.
+ * sysdeps/unix/sysv/linux/riscv/dl-cache.h (add_system_dir): Add
+ libraries path for rv32.
+ * sysdeps/riscv/bits/wordsize.h: Supprt rv32.
+ * sysdeps/riscv/nptl/bits/pthreadtypes-arch.h: Likewise.
+ * sysdeps/riscv/sfp-machine.h: Likewise.
+ * sysdeps/riscv/sys/asm.h: Likewise.
+ * sysdeps/unix/sysv/linux/riscv/rv32/jmp_buf-macros.h: New file.
2019-06-20 Dmitry V. Levin <ldv@altlinux.org>
Florian Weimer <fweimer@redhat.com>
diff --git a/sysdeps/riscv/bits/wordsize.h b/sysdeps/riscv/bits/wordsize.h
index 0b8cd8fefdb..f10be0144c4 100644
--- a/sysdeps/riscv/bits/wordsize.h
+++ b/sysdeps/riscv/bits/wordsize.h
@@ -25,5 +25,7 @@
#if __riscv_xlen == 64
# define __WORDSIZE_TIME64_COMPAT32 1
#else
-# error "rv32i-based targets are not supported"
+# define __WORDSIZE_TIME64_COMPAT32 0
+# define __WORDSIZE32_SIZE_ULONG 0
+# define __WORDSIZE32_PTRDIFF_LONG 0
#endif
diff --git a/sysdeps/riscv/nptl/bits/pthreadtypes-arch.h b/sysdeps/riscv/nptl/bits/pthreadtypes-arch.h
index e3fecc32082..4b08f7c692b 100644
--- a/sysdeps/riscv/nptl/bits/pthreadtypes-arch.h
+++ b/sysdeps/riscv/nptl/bits/pthreadtypes-arch.h
@@ -32,7 +32,15 @@
# define __SIZEOF_PTHREAD_BARRIER_T 32
# define __SIZEOF_PTHREAD_BARRIERATTR_T 4
#else
-# error "rv32i-based systems are not supported"
+# define __SIZEOF_PTHREAD_ATTR_T 32
+# define __SIZEOF_PTHREAD_MUTEX_T 32
+# define __SIZEOF_PTHREAD_MUTEXATTR_T 4
+# define __SIZEOF_PTHREAD_COND_T 48
+# define __SIZEOF_PTHREAD_CONDATTR_T 4
+# define __SIZEOF_PTHREAD_RWLOCK_T 48
+# define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
+# define __SIZEOF_PTHREAD_BARRIER_T 20
+# define __SIZEOF_PTHREAD_BARRIERATTR_T 4
#endif
#define __PTHREAD_COMPAT_PADDING_MID
@@ -56,11 +64,26 @@ struct __pthread_rwlock_arch_t
unsigned int __writers_futex;
unsigned int __pad3;
unsigned int __pad4;
+#if __riscv_xlen == 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_ELISION_EXTRA 0
diff --git a/sysdeps/riscv/sfp-machine.h b/sysdeps/riscv/sfp-machine.h
index fa0b8fa41a1..98e1f84370d 100644
--- a/sysdeps/riscv/sfp-machine.h
+++ b/sysdeps/riscv/sfp-machine.h
@@ -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
diff --git a/sysdeps/riscv/sys/asm.h b/sysdeps/riscv/sys/asm.h
index b8f90a44cea..7ea34afd6d1 100644
--- a/sysdeps/riscv/sys/asm.h
+++ b/sysdeps/riscv/sys/asm.h
@@ -26,7 +26,10 @@
# 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
diff --git a/sysdeps/unix/sysv/linux/riscv/rv32/jmp_buf-macros.h b/sysdeps/unix/sysv/linux/riscv/rv32/jmp_buf-macros.h
new file mode 100644
index 00000000000..e0042b9f01b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/riscv/rv32/jmp_buf-macros.h
@@ -0,0 +1,53 @@
+/* jump buffer constants for RISC-V
+ Copyright (C) 2017-2018 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
+ <http://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
--
2.22.0
More information about the Libc-alpha
mailing list