arch/arm/include/asm/vfpmacros.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * arch/arm/include/asm/vfpmacros.h
   4  *
   5  * Assembler-only file containing VFP macros and register definitions.
   6  */
   7 #include <asm/hwcap.h>
   8
   9 #include <asm/vfp.h>
  10
  11 #ifdef CONFIG_AS_VFP_VMRS_FPINST
  12         .macro  VFPFMRX, rd, sysreg, cond
  13         vmrs\cond       \rd, \sysreg
  14         .endm
  15
  16         .macro  VFPFMXR, sysreg, rd, cond
  17         vmsr\cond       \sysreg, \rd
  18         .endm
  19 #else
  20         @ Macros to allow building with old toolkits (with no VFP support)
  21         .macro  VFPFMRX, rd, sysreg, cond
  22         MRC\cond        p10, 7, \rd, \sysreg, cr0, 0    @ FMRX  \rd, \sysreg
  23         .endm
  24
  25         .macro  VFPFMXR, sysreg, rd, cond
  26         MCR\cond        p10, 7, \rd, \sysreg, cr0, 0    @ FMXR  \sysreg, \rd
  27         .endm
  28 #endif
  29
  30         @ read all the working registers back into the VFP
  31         .macro  VFPFLDMIA, base, tmp
  32         .fpu    vfpv2
  33 #if __LINUX_ARM_ARCH__ < 6
  34         fldmiax \base!, {d0-d15}
  35 #else
  36         vldmia  \base!, {d0-d15}
  37 #endif
  38 #ifdef CONFIG_VFPv3
  39         .fpu    vfpv3
  40 #if __LINUX_ARM_ARCH__ <= 6
  41         ldr     \tmp, =elf_hwcap                    @ may not have MVFR regs
  42         ldr     \tmp, [\tmp, #0]
  43         tst     \tmp, #HWCAP_VFPD32
  44         vldmiane \base!, {d16-d31}
  45         addeq   \base, \base, #32*4                 @ step over unused register space
  46 #else
  47         VFPFMRX \tmp, MVFR0                         @ Media and VFP Feature Register 0
  48         and     \tmp, \tmp, #MVFR0_A_SIMD_MASK      @ A_SIMD field
  49         cmp     \tmp, #2                            @ 32 x 64bit registers?
  50         vldmiaeq \base!, {d16-d31}
  51         addne   \base, \base, #32*4                 @ step over unused register space
  52 #endif
  53 #endif
  54         .endm
  55
  56         @ write all the working registers out of the VFP
  57         .macro  VFPFSTMIA, base, tmp
  58 #if __LINUX_ARM_ARCH__ < 6
  59         fstmiax \base!, {d0-d15}
  60 #else
  61         vstmia  \base!, {d0-d15}
  62 #endif
  63 #ifdef CONFIG_VFPv3
  64         .fpu    vfpv3
  65 #if __LINUX_ARM_ARCH__ <= 6
  66         ldr     \tmp, =elf_hwcap                    @ may not have MVFR regs
  67         ldr     \tmp, [\tmp, #0]
  68         tst     \tmp, #HWCAP_VFPD32
  69         vstmiane \base!, {d16-d31}
  70         addeq   \base, \base, #32*4                 @ step over unused register space
  71 #else
  72         VFPFMRX \tmp, MVFR0                         @ Media and VFP Feature Register 0
  73         and     \tmp, \tmp, #MVFR0_A_SIMD_MASK      @ A_SIMD field
  74         cmp     \tmp, #2                            @ 32 x 64bit registers?
  75         vstmiaeq \base!, {d16-d31}
  76         addne   \base, \base, #32*4                 @ step over unused register space
  77 #endif
  78 #endif
  79         .endm