arch/arm64/include/asm/fpsimdmacros.h

   1 /*
   2  * FP/SIMD state saving and restoring macros
   3  *
   4  * Copyright (C) 2012 ARM Ltd.
   5  * Author: Catalin Marinas <catalin.marinas@arm.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 .macro fpsimd_save state, tmpnr
  21         stp     q0, q1, [\state, #16 * 0]
  22         stp     q2, q3, [\state, #16 * 2]
  23         stp     q4, q5, [\state, #16 * 4]
  24         stp     q6, q7, [\state, #16 * 6]
  25         stp     q8, q9, [\state, #16 * 8]
  26         stp     q10, q11, [\state, #16 * 10]
  27         stp     q12, q13, [\state, #16 * 12]
  28         stp     q14, q15, [\state, #16 * 14]
  29         stp     q16, q17, [\state, #16 * 16]
  30         stp     q18, q19, [\state, #16 * 18]
  31         stp     q20, q21, [\state, #16 * 20]
  32         stp     q22, q23, [\state, #16 * 22]
  33         stp     q24, q25, [\state, #16 * 24]
  34         stp     q26, q27, [\state, #16 * 26]
  35         stp     q28, q29, [\state, #16 * 28]
  36         stp     q30, q31, [\state, #16 * 30]!
  37         mrs     x\tmpnr, fpsr
  38         str     w\tmpnr, [\state, #16 * 2]
  39         mrs     x\tmpnr, fpcr
  40         str     w\tmpnr, [\state, #16 * 2 + 4]
  41 .endm
  42
  43 .macro fpsimd_restore state, tmpnr
  44         ldp     q0, q1, [\state, #16 * 0]
  45         ldp     q2, q3, [\state, #16 * 2]
  46         ldp     q4, q5, [\state, #16 * 4]
  47         ldp     q6, q7, [\state, #16 * 6]
  48         ldp     q8, q9, [\state, #16 * 8]
  49         ldp     q10, q11, [\state, #16 * 10]
  50         ldp     q12, q13, [\state, #16 * 12]
  51         ldp     q14, q15, [\state, #16 * 14]
  52         ldp     q16, q17, [\state, #16 * 16]
  53         ldp     q18, q19, [\state, #16 * 18]
  54         ldp     q20, q21, [\state, #16 * 20]
  55         ldp     q22, q23, [\state, #16 * 22]
  56         ldp     q24, q25, [\state, #16 * 24]
  57         ldp     q26, q27, [\state, #16 * 26]
  58         ldp     q28, q29, [\state, #16 * 28]
  59         ldp     q30, q31, [\state, #16 * 30]!
  60         ldr     w\tmpnr, [\state, #16 * 2]
  61         msr     fpsr, x\tmpnr
  62         ldr     w\tmpnr, [\state, #16 * 2 + 4]
  63         msr     fpcr, x\tmpnr
  64 .endm
  65
  66 .altmacro
  67 .macro fpsimd_save_partial state, numnr, tmpnr1, tmpnr2
  68         mrs     x\tmpnr1, fpsr
  69         str     w\numnr, [\state, #8]
  70         mrs     x\tmpnr2, fpcr
  71         stp     w\tmpnr1, w\tmpnr2, [\state]
  72         adr     x\tmpnr1, 0f
  73         add     \state, \state, x\numnr, lsl #4
  74         sub     x\tmpnr1, x\tmpnr1, x\numnr, lsl #1
  75         br      x\tmpnr1
  76         .irp    qa, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0
  77         .irp    qb, %(qa + 1)
  78         stp     q\qa, q\qb, [\state, # -16 * \qa - 16]
  79         .endr
  80         .endr
  81 0:
  82 .endm
  83
  84 .macro fpsimd_restore_partial state, tmpnr1, tmpnr2
  85         ldp     w\tmpnr1, w\tmpnr2, [\state]
  86         msr     fpsr, x\tmpnr1
  87         msr     fpcr, x\tmpnr2
  88         adr     x\tmpnr1, 0f
  89         ldr     w\tmpnr2, [\state, #8]
  90         add     \state, \state, x\tmpnr2, lsl #4
  91         sub     x\tmpnr1, x\tmpnr1, x\tmpnr2, lsl #1
  92         br      x\tmpnr1
  93         .irp    qa, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 0
  94         .irp    qb, %(qa + 1)
  95         ldp     q\qa, q\qb, [\state, # -16 * \qa - 16]
  96         .endr
  97         .endr
  98 0:
  99 .endm