include/asm-arm/vfpmacros.h

   1 /*
   2  * linux/include/asm-arm/vfpmacros.h
   3  *
   4  * Assembler-only file containing VFP macros and register definitions.
   5  */
   6 #include "vfp.h"
   7
   8 @ Macros to allow building with old toolkits (with no VFP support)
   9         .macro  VFPFMRX, rd, sysreg, cond
  10         MRC\cond        p10, 7, \rd, \sysreg, cr0, 0    @ FMRX  \rd, \sysreg
  11         .endm
  12
  13         .macro  VFPFMXR, sysreg, rd, cond
  14         MCR\cond        p10, 7, \rd, \sysreg, cr0, 0    @ FMXR  \sysreg, \rd
  15         .endm
  16
  17         @ read all the working registers back into the VFP
  18         .macro  VFPFLDMIA, base, tmp
  19 #if __LINUX_ARM_ARCH__ < 6
  20         LDC     p11, cr0, [\base],#33*4             @ FLDMIAX \base!, {d0-d15}
  21 #else
  22         LDC     p11, cr0, [\base],#32*4             @ FLDMIAD \base!, {d0-d15}
  23 #endif
  24 #ifdef CONFIG_VFPv3
  25         VFPFMRX \tmp, MVFR0                         @ Media and VFP Feature Register 0
  26         and     \tmp, \tmp, #MVFR0_A_SIMD_MASK      @ A_SIMD field
  27         cmp     \tmp, #2                            @ 32 x 64bit registers?
  28         ldceql  p11, cr0, [\base],#32*4             @ FLDMIAD \base!, {d16-d31}
  29         addne   \base, \base, #32*4                 @ step over unused register space
  30 #endif
  31         .endm
  32
  33         @ write all the working registers out of the VFP
  34         .macro  VFPFSTMIA, base, tmp
  35 #if __LINUX_ARM_ARCH__ < 6
  36         STC     p11, cr0, [\base],#33*4             @ FSTMIAX \base!, {d0-d15}
  37 #else
  38         STC     p11, cr0, [\base],#32*4             @ FSTMIAD \base!, {d0-d15}
  39 #endif
  40 #ifdef CONFIG_VFPv3
  41         VFPFMRX \tmp, MVFR0                         @ Media and VFP Feature Register 0
  42         and     \tmp, \tmp, #MVFR0_A_SIMD_MASK      @ A_SIMD field
  43         cmp     \tmp, #2                            @ 32 x 64bit registers?
  44         stceql  p11, cr0, [\base],#32*4             @ FSTMIAD \base!, {d16-d31}
  45         addne   \base, \base, #32*4                 @ step over unused register space
  46 #endif
  47         .endm