arch/riscv/include/asm/asm.h

   1 /*
   2  * Copyright (C) 2015 Regents of the University of California
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  */
  13
  14 #ifndef _ASM_RISCV_ASM_H
  15 #define _ASM_RISCV_ASM_H
  16
  17 #ifdef __ASSEMBLY__
  18 #define __ASM_STR(x)    x
  19 #else
  20 #define __ASM_STR(x)    #x
  21 #endif
  22
  23 #if __riscv_xlen == 64
  24 #define __REG_SEL(a, b) __ASM_STR(a)
  25 #elif __riscv_xlen == 32
  26 #define __REG_SEL(a, b) __ASM_STR(b)
  27 #else
  28 #error "Unexpected __riscv_xlen"
  29 #endif
  30
  31 #define REG_L           __REG_SEL(ld, lw)
  32 #define REG_S           __REG_SEL(sd, sw)
  33 #define SZREG           __REG_SEL(8, 4)
  34 #define LGREG           __REG_SEL(3, 2)
  35
  36 #if __SIZEOF_POINTER__ == 8
  37 #ifdef __ASSEMBLY__
  38 #define RISCV_PTR               .dword
  39 #define RISCV_SZPTR             8
  40 #define RISCV_LGPTR             3
  41 #else
  42 #define RISCV_PTR               ".dword"
  43 #define RISCV_SZPTR             "8"
  44 #define RISCV_LGPTR             "3"
  45 #endif
  46 #elif __SIZEOF_POINTER__ == 4
  47 #ifdef __ASSEMBLY__
  48 #define RISCV_PTR               .word
  49 #define RISCV_SZPTR             4
  50 #define RISCV_LGPTR             2
  51 #else
  52 #define RISCV_PTR               ".word"
  53 #define RISCV_SZPTR             "4"
  54 #define RISCV_LGPTR             "2"
  55 #endif
  56 #else
  57 #error "Unexpected __SIZEOF_POINTER__"
  58 #endif
  59
  60 #if (__SIZEOF_INT__ == 4)
  61 #define RISCV_INT               __ASM_STR(.word)
  62 #define RISCV_SZINT             __ASM_STR(4)
  63 #define RISCV_LGINT             __ASM_STR(2)
  64 #else
  65 #error "Unexpected __SIZEOF_INT__"
  66 #endif
  67
  68 #if (__SIZEOF_SHORT__ == 2)
  69 #define RISCV_SHORT             __ASM_STR(.half)
  70 #define RISCV_SZSHORT           __ASM_STR(2)
  71 #define RISCV_LGSHORT           __ASM_STR(1)
  72 #else
  73 #error "Unexpected __SIZEOF_SHORT__"
  74 #endif
  75
  76 #endif /* _ASM_RISCV_ASM_H */