The Tor Browser: xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_parisc

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: asm; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * Version: MPL 1.1

     3  *

     4  * This Source Code Form is subject to the terms of the Mozilla Public

     5  * License, v. 2.0. If a copy of the MPL was not distributed with this

     6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     8   .LEVEL  1.1

     9   .TEXT

    10   .ALIGN 4

    12 curframesz:

    13   .EQU 128

    16 ; SharedStub has stack size of 128 bytes

    18 lastframesz:

    19   .EQU 64

    21 ; the StubN C++ function has a small stack size of 64 bytes

    24 .globl SharedStub

    25   .type SharedStub, @function

    27 SharedStub:

    28   .PROC

    29   .CALLINFO CALLER,FRAME=80,SAVE_RP

    31   .ENTRY

    32         STW     %rp,-20(%sp)

    33         LDO     128(%sp),%sp

    35         STW     %r19,-32(%r30)

    36         STW     %r26,-36-curframesz(%r30) ; save arg0 in previous frame

    38         LDO     -80(%r30),%r28

    39         FSTD,MA %fr5,8(%r28)   ; save darg0

    40         FSTD,MA %fr7,8(%r28)   ; save darg1

    41         FSTW,MA %fr4L,4(%r28)  ; save farg0

    42         FSTW,MA %fr5L,4(%r28)  ; save farg1

    43         FSTW,MA %fr6L,4(%r28)  ; save farg2

    44         FSTW,MA %fr7L,4(%r28)  ; save farg3

    46         ; Former value of register 26 is already properly saved by StubN,

    47         ; but register 25-23 are not because of the argument mismatch

    48         STW     %r25,-40-curframesz-lastframesz(%r30) ; save r25

    49         STW     %r24,-44-curframesz-lastframesz(%r30) ; save r24

    50         STW     %r23,-48-curframesz-lastframesz(%r30) ; save r23

    51         COPY    %r26,%r25                             ; method index is arg1

    52         LDW     -36-curframesz-lastframesz(%r30),%r26 ; self is arg0

    53         LDO     -40-curframesz-lastframesz(%r30),%r24 ; normal args is arg2

    54         LDO     -80(%r30),%r23                        ; floating args is arg3

    56         .CALL   ARGW0=GR,ARGW1=GR,ARGW2=GR,ARGW3=GR,RTNVAL=GR ;in=23-26;out=28;

    57         BL     PrepareAndDispatch, %r31

    58         COPY    %r31,%r2

    60         LDW     -32(%r30),%r19

    62         LDW     -148(%sp),%rp

    63         LDO     -128(%sp),%sp

    66         BV,N     (%rp)

    67         NOP

    68         NOP

    70   .EXIT

    71   .PROCEND        ;in=26;out=28;

    73   .SIZE SharedStub, .-SharedStub

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