arch/arm/include/asm/unified.h

   1 /*
   2  * include/asm-arm/unified.h - Unified Assembler Syntax helper macros
   3  *
   4  * Copyright (C) 2008 ARM Limited
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program 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
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #ifndef __ASM_UNIFIED_H
  21 #define __ASM_UNIFIED_H
  22
  23 #if defined(__ASSEMBLY__) && defined(CONFIG_ARM_ASM_UNIFIED)
  24         .syntax unified
  25 #endif
  26
  27 #ifdef CONFIG_THUMB2_KERNEL
  28
  29 #if __GNUC__ < 4
  30 #error Thumb-2 kernel requires gcc >= 4
  31 #endif
  32
  33 /* The CPSR bit describing the instruction set (Thumb) */
  34 #define PSR_ISETSTATE   PSR_T_BIT
  35
  36 #define ARM(x...)
  37 #define THUMB(x...)     x
  38 #ifdef __ASSEMBLY__
  39 #define W(instr)        instr.w
  40 #define BSYM(sym)       sym + 1
  41 #endif
  42
  43 #else   /* !CONFIG_THUMB2_KERNEL */
  44
  45 /* The CPSR bit describing the instruction set (ARM) */
  46 #define PSR_ISETSTATE   0
  47
  48 #define ARM(x...)       x
  49 #define THUMB(x...)
  50 #ifdef __ASSEMBLY__
  51 #define W(instr)        instr
  52 #define BSYM(sym)       sym
  53 #endif
  54
  55 #endif  /* CONFIG_THUMB2_KERNEL */
  56
  57 #ifndef CONFIG_ARM_ASM_UNIFIED
  58
  59 /*
  60  * If the unified assembly syntax isn't used (in ARM mode), these
  61  * macros expand to an empty string
  62  */
  63 #ifdef __ASSEMBLY__
  64         .macro  it, cond
  65         .endm
  66         .macro  itt, cond
  67         .endm
  68         .macro  ite, cond
  69         .endm
  70         .macro  ittt, cond
  71         .endm
  72         .macro  itte, cond
  73         .endm
  74         .macro  itet, cond
  75         .endm
  76         .macro  itee, cond
  77         .endm
  78         .macro  itttt, cond
  79         .endm
  80         .macro  ittte, cond
  81         .endm
  82         .macro  ittet, cond
  83         .endm
  84         .macro  ittee, cond
  85         .endm
  86         .macro  itett, cond
  87         .endm
  88         .macro  itete, cond
  89         .endm
  90         .macro  iteet, cond
  91         .endm
  92         .macro  iteee, cond
  93         .endm
  94 #else   /* !__ASSEMBLY__ */
  95 __asm__(
  96 "       .macro  it, cond\n"
  97 "       .endm\n"
  98 "       .macro  itt, cond\n"
  99 "       .endm\n"
 100 "       .macro  ite, cond\n"
 101 "       .endm\n"
 102 "       .macro  ittt, cond\n"
 103 "       .endm\n"
 104 "       .macro  itte, cond\n"
 105 "       .endm\n"
 106 "       .macro  itet, cond\n"
 107 "       .endm\n"
 108 "       .macro  itee, cond\n"
 109 "       .endm\n"
 110 "       .macro  itttt, cond\n"
 111 "       .endm\n"
 112 "       .macro  ittte, cond\n"
 113 "       .endm\n"
 114 "       .macro  ittet, cond\n"
 115 "       .endm\n"
 116 "       .macro  ittee, cond\n"
 117 "       .endm\n"
 118 "       .macro  itett, cond\n"
 119 "       .endm\n"
 120 "       .macro  itete, cond\n"
 121 "       .endm\n"
 122 "       .macro  iteet, cond\n"
 123 "       .endm\n"
 124 "       .macro  iteee, cond\n"
 125 "       .endm\n");
 126 #endif  /* __ASSEMBLY__ */
 127
 128 #endif  /* CONFIG_ARM_ASM_UNIFIED */
 129
 130 #endif  /* !__ASM_UNIFIED_H */