Release 4.14 arch/arm64/include/asm/fpsimdmacros.h
/*
* FP/SIMD state saving and restoring macros
*
* Copyright (C) 2012 ARM Ltd.
* Author: Catalin Marinas <catalin.marinas@arm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
.macro fpsimd_save state, tmpnr
stp q0, q1, [\state, #16 * 0]
stp q2, q3, [\state, #16 * 2]
stp q4, q5, [\state, #16 * 4]
stp q6, q7, [\state, #16 * 6]
stp q8, q9, [\state, #16 * 8]
stp q10, q11, [\state, #16 * 10]
stp q12, q13, [\state, #16 * 12]
stp q14, q15, [\state, #16 * 14]
stp q16, q17, [\state, #16 * 16]
stp q18, q19, [\state, #16 * 18]
stp q20, q21, [\state, #16 * 20]
stp q22, q23, [\state, #16 * 22]
stp q24, q25, [\state, #16 * 24]
stp q26, q27, [\state, #16 * 26]
stp q28, q29, [\state, #16 * 28]
stp q30, q31, [\state, #16 * 30]!
mrs x\tmpnr, fpsr
str w\tmpnr, [\state, #16 * 2]
mrs x\tmpnr, fpcr
str w\tmpnr, [\state, #16 * 2 + 4]
.endm
.macro fpsimd_restore_fpcr state, tmp
/*
* Writes to fpcr may be self-synchronising, so avoid restoring
* the register if it hasn't changed.
*/
mrs \tmp, fpcr
cmp \tmp, \state
b.eq 9999f
msr fpcr, \state
9999:
.endm
/* Clobbers \state */
.macro fpsimd_restore state, tmpnr
ldp q0, q1, [\state, #16 * 0]
ldp q2, q3, [\state, #16 * 2]
ldp q4, q5, [\state, #16 * 4]
ldp q6, q7, [\state, #16 * 6]
ldp q8, q9, [\state, #16 * 8]
ldp q10, q11, [\state, #16 * 10]
ldp q12, q13, [\state, #16 * 12]
ldp q14, q15, [\state, #16 * 14]
ldp q16, q17, [\state, #16 * 16]
ldp q18, q19, [\state, #16 * 18]
ldp q20, q21, [\state, #16 * 20]
ldp q22, q23, [\state, #16 * 22]
ldp q24, q25, [\state, #16 * 24]
ldp q26, q27, [\state, #16 * 26]
ldp q28, q29, [\state, #16 * 28]
ldp q30, q31, [\state, #16 * 30]!
ldr w\tmpnr, [\state, #16 * 2]
msr fpsr, x\tmpnr
ldr w\tmpnr, [\state, #16 * 2 + 4]
fpsimd_restore_fpcr x\tmpnr, \state
.endm
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