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50867db066
Now that the minimum supported binutils version is 2.25, we no longer need a workaround for binutils older than 2.24 for accessing VFP control registers from assembler. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* arch/arm/include/asm/vfpmacros.h
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*
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* Assembler-only file containing VFP macros and register definitions.
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*/
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#include <asm/hwcap.h>
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#include <asm/vfp.h>
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.macro VFPFMRX, rd, sysreg, cond
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vmrs\cond \rd, \sysreg
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.endm
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.macro VFPFMXR, sysreg, rd, cond
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vmsr\cond \sysreg, \rd
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.endm
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@ read all the working registers back into the VFP
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.macro VFPFLDMIA, base, tmp
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.fpu vfpv2
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#if __LINUX_ARM_ARCH__ < 6
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fldmiax \base!, {d0-d15}
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#else
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vldmia \base!, {d0-d15}
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#endif
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#ifdef CONFIG_VFPv3
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.fpu vfpv3
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#if __LINUX_ARM_ARCH__ <= 6
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ldr \tmp, =elf_hwcap @ may not have MVFR regs
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ldr \tmp, [\tmp, #0]
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tst \tmp, #HWCAP_VFPD32
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vldmiane \base!, {d16-d31}
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addeq \base, \base, #32*4 @ step over unused register space
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#else
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VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0
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and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field
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cmp \tmp, #2 @ 32 x 64bit registers?
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vldmiaeq \base!, {d16-d31}
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addne \base, \base, #32*4 @ step over unused register space
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#endif
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#endif
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.endm
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@ write all the working registers out of the VFP
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.macro VFPFSTMIA, base, tmp
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#if __LINUX_ARM_ARCH__ < 6
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fstmiax \base!, {d0-d15}
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#else
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vstmia \base!, {d0-d15}
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#endif
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#ifdef CONFIG_VFPv3
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.fpu vfpv3
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#if __LINUX_ARM_ARCH__ <= 6
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ldr \tmp, =elf_hwcap @ may not have MVFR regs
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ldr \tmp, [\tmp, #0]
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tst \tmp, #HWCAP_VFPD32
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vstmiane \base!, {d16-d31}
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addeq \base, \base, #32*4 @ step over unused register space
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#else
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VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0
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and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field
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cmp \tmp, #2 @ 32 x 64bit registers?
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vstmiaeq \base!, {d16-d31}
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addne \base, \base, #32*4 @ step over unused register space
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#endif
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#endif
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.endm
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