MdePkg/Library/BaseLib/Ipf/longjmp.s

   1 /// @file
   2 ///  Contains an implementation of longjmp for the Itanium-based architecture.
   3 ///
   4 /// Copyright (c) 2006, Intel Corporation
   5 /// All rights reserved. This program and the accompanying materials
   6 /// are licensed and made available under the terms and conditions of the BSD License
   7 /// which accompanies this distribution.  The full text of the license may be found at
   8 /// http://opensource.org/licenses/bsd-license.php
   9 ///
  10 /// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 /// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 ///
  13 /// Module Name: longjmp.s
  14 ///
  15 ///
  16
  17 .auto
  18 .text
  19
  20 .proc   InternalLongJump
  21 .type   InternalLongJump, @function
  22 .regstk 2, 0, 0, 0
  23 InternalLongJump::
  24         add                 r10 = 0x10*20 + 8*14, in0
  25         movl                r2  = ~((((1 << 14) - 1) << 16) | 3)
  26
  27         ld8.nt1             r14 = [r10], -8*2       // BSP, skip PFS
  28         mov                 r15 = ar.bspstore       // BSPSTORE
  29
  30         ld8.nt1             r17 = [r10], -8         // UNAT after spill
  31         mov                 r16 = ar.rsc            // RSC
  32         cmp.leu             p6  = r14, r15
  33
  34         ld8.nt1             r18 = [r10], -8         // UNAT
  35         ld8.nt1             r25 = [r10], -8         // b5
  36         and                 r2  = r16, r2
  37
  38         ldf.fill.nt1        f2  = [in0], 0x10
  39         ld8.nt1             r24 = [r10], -8         // b4
  40         mov                 b5  = r25
  41
  42         mov                 ar.rsc = r2
  43         ld8.nt1             r23 = [r10], -8         // b3
  44         mov                 b4  = r24
  45
  46         ldf.fill.nt1        f3  = [in0], 0x10
  47         mov                 ar.unat = r17
  48 (p6)    br.spnt.many        _skip_flushrs
  49
  50         flushrs
  51         mov                 r15 = ar.bsp            // New BSPSTORE
  52
  53 _skip_flushrs:
  54         mov                 r31 = ar.rnat           // RNAT
  55         loadrs
  56
  57         ldf.fill.nt1        f4  = [in0], 0x10
  58         ld8.nt1             r22 = [r10], -8
  59         dep                 r2  = -1, r14, 3, 6
  60
  61         ldf.fill.nt1        f5  = [in0], 0x10
  62         ld8.nt1             r21 = [r10], -8
  63         cmp.ltu             p6  = r2, r15
  64
  65         ld8.nt1             r20 = [r10], -0x10      // skip sp
  66 (p6)    ld8.nta             r31 = [r2]
  67         mov                 b3  = r23
  68
  69         ldf.fill.nt1        f16 = [in0], 0x10
  70         ld8.fill.nt1        r7  = [r10], -8
  71         mov                 b2  = r22
  72
  73         ldf.fill.nt1        f17 = [in0], 0x10
  74         ld8.fill.nt1        r6  = [r10], -8
  75         mov                 b1  = r21
  76
  77         ldf.fill.nt1        f18 = [in0], 0x10
  78         ld8.fill.nt1        r5  = [r10], -8
  79         mov                 b0  = r20
  80
  81         ldf.fill.nt1        f19 = [in0], 0x10
  82         ld8.fill.nt1        r4  = [r10], 8*13
  83
  84         ldf.fill.nt1        f20 = [in0], 0x10
  85         ld8.nt1             r19 = [r10], 0x10       // PFS
  86
  87         ldf.fill.nt1        f21 = [in0], 0x10
  88         ld8.nt1             r26 = [r10], 8          // Predicate
  89         mov                 ar.pfs = r19
  90
  91         ldf.fill.nt1        f22 = [in0], 0x10
  92         ld8.nt1             r27 = [r10], 8          // LC
  93         mov                 pr  = r26, -1
  94
  95         ldf.fill.nt1        f23 = [in0], 0x10
  96         ld8.nt1             r28 = [r10], -17*8 - 0x10
  97         mov                 ar.lc = r27
  98
  99         ldf.fill.nt1        f24 = [in0], 0x10
 100         ldf.fill.nt1        f25 = [in0], 0x10
 101         mov                 r8  = in1
 102
 103         ldf.fill.nt1        f26 = [in0], 0x10
 104         ldf.fill.nt1        f31 = [r10], -0x10
 105
 106         ldf.fill.nt1        f27 = [in0], 0x10
 107         ldf.fill.nt1        f30 = [r10], -0x10
 108
 109         ldf.fill.nt1        f28 = [in0]
 110         ldf.fill.nt1        f29 = [r10], 0x10*3 + 8*4
 111
 112         ld8.fill.nt1        sp  = [r10]
 113         mov                 ar.unat = r18
 114
 115         mov                 ar.bspstore = r14
 116         mov                 ar.rnat = r31
 117
 118         invala
 119         mov                 ar.rsc = r16
 120         br.ret.sptk         b0
 121 .endp