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  * SPDX-License-Identifier:     GPL-2.0
   7  */
   8
   9 #ifndef __ASM_UNIFIED_H
  10 #define __ASM_UNIFIED_H
  11
  12 #if defined(__ASSEMBLY__) && defined(CONFIG_ARM_ASM_UNIFIED)
  13         .syntax unified
  14 #endif
  15
  16 #ifdef CONFIG_CPU_V7M
  17 #define AR_CLASS(x...)
  18 #define M_CLASS(x...)   x
  19 #else
  20 #define AR_CLASS(x...)  x
  21 #define M_CLASS(x...)
  22 #endif
  23
  24 #ifdef CONFIG_THUMB2_KERNEL
  25
  26 #if __GNUC__ < 4
  27 #error Thumb-2 kernel requires gcc >= 4
  28 #endif
  29
  30 /* The CPSR bit describing the instruction set (Thumb) */
  31 #define PSR_ISETSTATE   PSR_T_BIT
  32
  33 #define ARM(x...)
  34 #define THUMB(x...)     x
  35 #ifdef __ASSEMBLY__
  36 #define W(instr)        instr.w
  37 #else
  38 #define WASM(instr)     #instr ".w"
  39 #endif
  40
  41 #else   /* !CONFIG_THUMB2_KERNEL */
  42
  43 /* The CPSR bit describing the instruction set (ARM) */
  44 #define PSR_ISETSTATE   0
  45
  46 #define ARM(x...)       x
  47 #define THUMB(x...)
  48 #ifdef __ASSEMBLY__
  49 #define W(instr)        instr
  50 #else
  51 #define WASM(instr)     #instr
  52 #endif
  53
  54 #endif  /* CONFIG_THUMB2_KERNEL */
  55
  56 #ifndef CONFIG_ARM_ASM_UNIFIED
  57
  58 /*
  59  * If the unified assembly syntax isn't used (in ARM mode), these
  60  * macros expand to an empty string
  61  */
  62 #ifdef __ASSEMBLY__
  63         .macro  it, cond
  64         .endm
  65         .macro  itt, cond
  66         .endm
  67         .macro  ite, cond
  68         .endm
  69         .macro  ittt, cond
  70         .endm
  71         .macro  itte, cond
  72         .endm
  73         .macro  itet, cond
  74         .endm
  75         .macro  itee, cond
  76         .endm
  77         .macro  itttt, cond
  78         .endm
  79         .macro  ittte, cond
  80         .endm
  81         .macro  ittet, cond
  82         .endm
  83         .macro  ittee, cond
  84         .endm
  85         .macro  itett, cond
  86         .endm
  87         .macro  itete, cond
  88         .endm
  89         .macro  iteet, cond
  90         .endm
  91         .macro  iteee, cond
  92         .endm
  93 #else   /* !__ASSEMBLY__ */
  94 __asm__(
  95 "       .macro  it, cond\n"
  96 "       .endm\n"
  97 "       .macro  itt, cond\n"
  98 "       .endm\n"
  99 "       .macro  ite, cond\n"
 100 "       .endm\n"
 101 "       .macro  ittt, cond\n"
 102 "       .endm\n"
 103 "       .macro  itte, cond\n"
 104 "       .endm\n"
 105 "       .macro  itet, cond\n"
 106 "       .endm\n"
 107 "       .macro  itee, cond\n"
 108 "       .endm\n"
 109 "       .macro  itttt, cond\n"
 110 "       .endm\n"
 111 "       .macro  ittte, cond\n"
 112 "       .endm\n"
 113 "       .macro  ittet, cond\n"
 114 "       .endm\n"
 115 "       .macro  ittee, cond\n"
 116 "       .endm\n"
 117 "       .macro  itett, cond\n"
 118 "       .endm\n"
 119 "       .macro  itete, cond\n"
 120 "       .endm\n"
 121 "       .macro  iteet, cond\n"
 122 "       .endm\n"
 123 "       .macro  iteee, cond\n"
 124 "       .endm\n");
 125 #endif  /* __ASSEMBLY__ */
 126
 127 #endif  /* CONFIG_ARM_ASM_UNIFIED */
 128
 129 #endif  /* !__ASM_UNIFIED_H */