1 /* SPDX-License-Identifier: GPL-2.0 */
3 * arch/arm/include/asm/vfpmacros.h
5 * Assembler-only file containing VFP macros and register definitions.
11 @ Macros to allow building with old toolkits (with no VFP support)
12 .macro VFPFMRX, rd, sysreg, cond
13 MRC\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMRX \rd, \sysreg
16 .macro VFPFMXR, sysreg, rd, cond
17 MCR\cond p10, 7, \rd, \sysreg, cr0, 0 @ FMXR \sysreg, \rd
20 @ read all the working registers back into the VFP
21 .macro VFPFLDMIA, base, tmp
22 #if __LINUX_ARM_ARCH__ < 6
23 LDC p11, cr0, [\base],#33*4 @ FLDMIAX \base!, {d0-d15}
25 LDC p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d0-d15}
28 #if __LINUX_ARM_ARCH__ <= 6
29 ldr \tmp, =elf_hwcap @ may not have MVFR regs
31 tst \tmp, #HWCAP_VFPD32
32 ldclne p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d16-d31}
33 addeq \base, \base, #32*4 @ step over unused register space
35 VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0
36 and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field
37 cmp \tmp, #2 @ 32 x 64bit registers?
38 ldcleq p11, cr0, [\base],#32*4 @ FLDMIAD \base!, {d16-d31}
39 addne \base, \base, #32*4 @ step over unused register space
44 @ write all the working registers out of the VFP
45 .macro VFPFSTMIA, base, tmp
46 #if __LINUX_ARM_ARCH__ < 6
47 STC p11, cr0, [\base],#33*4 @ FSTMIAX \base!, {d0-d15}
49 STC p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d0-d15}
52 #if __LINUX_ARM_ARCH__ <= 6
53 ldr \tmp, =elf_hwcap @ may not have MVFR regs
55 tst \tmp, #HWCAP_VFPD32
56 stclne p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d16-d31}
57 addeq \base, \base, #32*4 @ step over unused register space
59 VFPFMRX \tmp, MVFR0 @ Media and VFP Feature Register 0
60 and \tmp, \tmp, #MVFR0_A_SIMD_MASK @ A_SIMD field
61 cmp \tmp, #2 @ 32 x 64bit registers?
62 stcleq p11, cr0, [\base],#32*4 @ FSTMIAD \base!, {d16-d31}
63 addne \base, \base, #32*4 @ step over unused register space