source: mainline/boot/arch/ia64/src/pal_asm.S

#
# Copyright (c) 2011 Jakub Jermar
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
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# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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#include <abi/asmtool.h>

.explicit

FUNCTION_BEGIN(pal_static_call)
        alloc loc0 = ar.pfs, 7, 6, 0, 0

        mov loc1 = psr ;;
        mov psr.l = r0 ;;
        srlz.i
        srlz.d

        mov loc2 = gp
        mov loc3 = rp

        addl loc4 = @gprel(pal_proc), gp

        mov r28 = in0
        mov r29 = in1
        mov r30 = in2
        mov r31 = in3 ;;

        ld8 loc4 = [loc4]
        movl loc5 = 0f ;;

        mov b6 = loc4
        mov rp = loc5 ;;
        br.cond.sptk.many b6

0:
        mov psr.l = loc1 ;;
        srlz.i
        srlz.d

        cmp.ne p7,p0 = 0, in4
        cmp.ne p8,p0 = 0, in5
        cmp.ne p9,p0 = 0, in6 ;;

(p7)    st8 [in4] = r9
(p8)    st8 [in5] = r10
(p9)    st8 [in6] = r11

        mov gp = loc2
        mov rp = loc3 ;;

        mov ar.pfs = loc0
        br.ret.sptk.many rp
FUNCTION_END(pal_static_call)