1  /* Miscellaneous macros.
       2     Copyright (C) 2000-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library.  If not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifndef _SYS_ASM_H
      20  #define _SYS_ASM_H
      21  
      22  /* Macros to handle different pointer/register sizes for 32/64-bit code.  */
      23  #if __riscv_xlen == 64
      24  # define PTRLOG 3
      25  # define SZREG  8
      26  # define REG_S sd
      27  # define REG_L ld
      28  #elif __riscv_xlen == 32
      29  # define PTRLOG 2
      30  # define SZREG  4
      31  # define REG_S sw
      32  # define REG_L lw
      33  #else
      34  # error __riscv_xlen must equal 32 or 64
      35  #endif
      36  
      37  #if !defined __riscv_float_abi_soft
      38  /* For ABI uniformity, reserve 8 bytes for floats, even if double-precision
      39     floating-point is not supported in hardware.  */
      40  # if defined __riscv_float_abi_double
      41  #  define FREG_L fld
      42  #  define FREG_S fsd
      43  #  define SZFREG 8
      44  # else
      45  #  error unsupported FLEN
      46  # endif
      47  #endif
      48  
      49  /* Declare leaf routine.  */
      50  #define	LEAF(symbol)				\
      51  		.globl	symbol;			\
      52  		.align	2;			\
      53  		.type	symbol,@function;	\
      54  symbol:						\
      55  		cfi_startproc;
      56  
      57  /* Mark end of function.  */
      58  #undef END
      59  #define END(function)				\
      60  		cfi_endproc;			\
      61  		.size	function,.-function
      62  
      63  /* Stack alignment.  */
      64  #define ALMASK	~15
      65  
      66  #endif /* sys/asm.h */