linux/arch/arm/include/asm/vfpmacros.h
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   1/*
   2 * arch/arm/include/asm/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
  48
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