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-rw-r--r--arch/arm/include/asm/vfpmacros.h79
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diff --git a/arch/arm/include/asm/vfpmacros.h b/arch/arm/include/asm/vfpmacros.h
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+/* 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