include/asm/vfpmacros.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * arch/arm/include/asm/vfpmacros.h
0004  *
0005  * Assembler-only file containing VFP macros and register definitions.
0006  */
0007 #include <asm/hwcap.h>
0008
0009 #include <asm/vfp.h>
0010
0011 #ifdef CONFIG_AS_VFP_VMRS_FPINST
0012     .macro  VFPFMRX, rd, sysreg, cond
0013     vmrs\cond   \rd, \sysreg
0014     .endm
0015
0016     .macro  VFPFMXR, sysreg, rd, cond
0017     vmsr\cond   \sysreg, \rd
0018     .endm
0019 #else
0020     @ Macros to allow building with old toolkits (with no VFP support)
0021     .macro  VFPFMRX, rd, sysreg, cond
0022     MRC\cond    p10, 7, \rd, \sysreg, cr0, 0    @ FMRX  \rd, \sysreg
0023     .endm
0024
0025     .macro  VFPFMXR, sysreg, rd, cond
0026     MCR\cond    p10, 7, \rd, \sysreg, cr0, 0    @ FMXR  \sysreg, \rd
0027     .endm
0028 #endif
0029
0030     @ read all the working registers back into the VFP
0031     .macro  VFPFLDMIA, base, tmp
0032     .fpu    vfpv2
0033 #if __LINUX_ARM_ARCH__ < 6
0034     fldmiax \base!, {d0-d15}
0035 #else
0036     vldmia  \base!, {d0-d15}
0037 #endif
0038 #ifdef CONFIG_VFPv3
0039     .fpu    vfpv3
0040 #if __LINUX_ARM_ARCH__ <= 6
0041     ldr \tmp, =elf_hwcap            @ may not have MVFR regs
0042     ldr \tmp, [\tmp, #0]
0043     tst \tmp, #HWCAP_VFPD32
0044     vldmiane \base!, {d16-d31}
0045     addeq   \base, \base, #32*4         @ step over unused register space
0046 #else
0047     VFPFMRX \tmp, MVFR0             @ Media and VFP Feature Register 0
0048     and \tmp, \tmp, #MVFR0_A_SIMD_MASK      @ A_SIMD field
0049     cmp \tmp, #2                @ 32 x 64bit registers?
0050     vldmiaeq \base!, {d16-d31}
0051     addne   \base, \base, #32*4         @ step over unused register space
0052 #endif
0053 #endif
0054     .endm
0055
0056     @ write all the working registers out of the VFP
0057     .macro  VFPFSTMIA, base, tmp
0058 #if __LINUX_ARM_ARCH__ < 6
0059     fstmiax \base!, {d0-d15}
0060 #else
0061     vstmia  \base!, {d0-d15}
0062 #endif
0063 #ifdef CONFIG_VFPv3
0064     .fpu    vfpv3
0065 #if __LINUX_ARM_ARCH__ <= 6
0066     ldr \tmp, =elf_hwcap            @ may not have MVFR regs
0067     ldr \tmp, [\tmp, #0]
0068     tst \tmp, #HWCAP_VFPD32
0069     vstmiane \base!, {d16-d31}
0070     addeq   \base, \base, #32*4         @ step over unused register space
0071 #else
0072     VFPFMRX \tmp, MVFR0             @ Media and VFP Feature Register 0
0073     and \tmp, \tmp, #MVFR0_A_SIMD_MASK      @ A_SIMD field
0074     cmp \tmp, #2                @ 32 x 64bit registers?
0075     vstmiaeq \base!, {d16-d31}
0076     addne   \base, \base, #32*4         @ step over unused register space
0077 #endif
0078 #endif
0079     .endm