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Diffstat (limited to '')
| -rw-r--r-- | arch/arm/include/asm/vfpmacros.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/arch/arm/include/asm/vfpmacros.h b/arch/arm/include/asm/vfpmacros.h new file mode 100644 index 0000000000..ba0d4cb537 --- /dev/null +++ b/arch/arm/include/asm/vfpmacros.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * arch/arm/include/asm/vfpmacros.h + * + * Assembler-only file containing VFP macros and register definitions. + */ +#include <asm/hwcap.h> + +#include <asm/vfp.h> + +#ifdef CONFIG_AS_VFP_VMRS_FPINST + .macro VFPFMRX, rd, sysreg, cond + vmrs\cond \rd, \sysreg + .endm + + .macro VFPFMXR, sysreg, rd, cond + vmsr\cond \sysreg, \rd + .endm +#else + @ Macros to allow building with old toolkits (with no VFP support) + .macro VFPFMRX, rd, sysreg, cond + MRC\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMRX \rd, \sysreg + .endm + + .macro VFPFMXR, sysreg, rd, cond + MCR\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMXR \sysreg, \rd + .endm +#endif + + @ read all the working registers back into the VFP + .macro VFPFLDMIA, base, tmp + .fpu vfpv2 +#if __LINUX_ARM_ARCH__ < 6 + fldmiax \base!, {d0-d15} +#else + vldmia \base!, {d0-d15} +#endif +#ifdef CONFIG_VFPv3 + .fpu vfpv3 +#if __LINUX_ARM_ARCH__ <= 6 + ldr \tmp, =elf_hwcap @ may not have MVFR regs + ldr \tmp, [\tmp, #0] + tst \tmp, #HWCAP_VFPD32 + vldmiane \base!, {d16-d31} + addeq \base, \base, #32*4 @ step over unused register space +#else + VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0 + and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field + cmp \tmp, #2 @ 32 x 64bit registers? + vldmiaeq \base!, {d16-d31} + addne \base, \base, #32*4 @ step over unused register space +#endif +#endif + .endm + + @ write all the working registers out of the VFP + .macro VFPFSTMIA, base, tmp +#if __LINUX_ARM_ARCH__ < 6 + fstmiax \base!, {d0-d15} +#else + vstmia \base!, {d0-d15} +#endif +#ifdef CONFIG_VFPv3 + .fpu vfpv3 +#if __LINUX_ARM_ARCH__ <= 6 + ldr \tmp, =elf_hwcap @ may not have MVFR regs + ldr \tmp, [\tmp, #0] + tst \tmp, #HWCAP_VFPD32 + vstmiane \base!, {d16-d31} + addeq \base, \base, #32*4 @ step over unused register space +#else + VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0 + and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field + cmp \tmp, #2 @ 32 x 64bit registers? + vstmiaeq \base!, {d16-d31} + addne \base, \base, #32*4 @ step over unused register space +#endif +#endif + .endm |