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/* Copyright (C) 1999-2021 Free Software Foundation, Inc.
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <features.h>
LEAF(__ia64_flush_rbs)
flushrs
mov r9 = ar.rsc // 12 cyc latency
;;
mov r8 = ar.bsp // 12 cyc latency
;;
and r16 = ~0x3, r9 // clear ar.rsc.mode
;;
mov ar.rsc = r16 // put RSE into enforced-lazy mode
;;
mov r10 = ar.rnat // 5 cyc latency
ret
END(__ia64_flush_rbs)
# define pPos p6 /* is rotate count positive? */
# define pNeg p7 /* is rotate count negative? */
/* __ia64_longjmp(__jmp_buf buf, int val, long rnat, long rsc) */
LEAF(__ia64_longjmp)
alloc r8=ar.pfs,4,0,0,0
add r2=0x98,in0 // r2 <- &jmpbuf.orig_jmp_buf_addr
add r3=0x88,in0 // r3 <- &jmpbuf.ar_bsp
;;
ld8 r8=[r2] // r8 <- orig_jmp_buf_addr
ld8 r23=[r3],8 // r23 <- jmpbuf.ar_bsp
mov r2=in0
;;
//
// Note: we need to redo the "flushrs" here even though it's
// already been done by __ia64_flush_rbs. It is needed to
// ensure that ar.bspstore == ar.bsp.
//
flushrs // flush dirty regs to backing store
ld8 r25=[r3] // r25 <- jmpbuf.ar_unat
sub r8=r8,in0 // r8 <- &orig_jmpbuf - &jmpbuf
;;
add r3=8,in0 // r3 <- &jmpbuf.r1
extr.u r8=r8,3,6 // r8 <- (&orig_jmpbuf - &jmpbuf)/8 & 0x3f
;;
cmp.lt pNeg,pPos=r8,r0
;;
(pPos) mov r16=r8
(pNeg) add r16=64,r8
(pPos) sub r17=64,r8
(pNeg) sub r17=r0,r8
;;
shr.u r8=r25,r16
shl r9=r25,r17
;;
or r25=r8,r9
;;
mov ar.unat=r25 // setup ar.unat (NaT bits for r1, r4-r7, and r12)
;;
ld8.fill.nta sp=[r2],16 // r12 (sp)
ld8.fill.nta gp=[r3],32 // r1 (gp)
dep r11=-1,r23,3,6 // r11 <- ia64_rse_rnat_addr(jmpbuf.ar_bsp)
;;
ld8.nta r16=[r2],16 // caller's unat
// ld8.nta r17=[r3],16 // fpsr
;;
ld8.fill.nta r4=[r2],16 // r4
ld8.fill.nta r5=[r3],16 // r5 (gp)
;;
ld8.fill.nta r6=[r2],16 // r6
ld8.fill.nta r7=[r3],16 // r7
;;
mov ar.unat=r16 // restore caller's unat
// mov ar.fpsr=r17 // restore fpsr
;;
ld8.nta r16=[r2],16 // b0
ld8.nta r17=[r3],16 // b1
;;
mov ar.bspstore=r23 // restore ar.bspstore
ld8.nta r18=[r2],16 // b2
;;
mov ar.rnat=in2 // restore ar.rnat
ld8.nta r19=[r3],16 // b3
;;
ld8.nta r20=[r2],16 // b4
ld8.nta r21=[r3],16 // b5
#ifdef PTR_DEMANGLE
PTR_DEMANGLE (r16, r24)
#endif
;;
ld8.nta r11=[r2],16 // ar.pfs
ld8.nta r22=[r3],56 // ar.lc
;;
ld8.nta r24=[r2],32 // pr
mov ar.rsc=in3 // restore ar.rsc
mov b0=r16
;;
ldf.fill.nta f2=[r2],32
ldf.fill.nta f3=[r3],32
mov b1=r17
;;
ldf.fill.nta f4=[r2],32
ldf.fill.nta f5=[r3],32
mov b2=r18
;;
ldf.fill.nta f16=[r2],32
ldf.fill.nta f17=[r3],32
mov b3=r19
;;
ldf.fill.nta f18=[r2],32
ldf.fill.nta f19=[r3],32
mov b4=r20
;;
ldf.fill.nta f20=[r2],32
ldf.fill.nta f21=[r3],32
mov b5=r21
;;
ldf.fill.nta f22=[r2],32
ldf.fill.nta f23=[r3],32
mov ar.lc=r22
;;
ldf.fill.nta f24=[r2],32
ldf.fill.nta f25=[r3],32
cmp.eq p8,p9=0,in1
;;
ldf.fill.nta f26=[r2],32
ldf.fill.nta f27=[r3],32
mov ar.pfs=r11
;;
ldf.fill.nta f28=[r2],32
ldf.fill.nta f29=[r3],32
(p8) mov r8=1
;;
ldf.fill.nta f30=[r2]
ldf.fill.nta f31=[r3]
(p9) mov r8=in1
invala // virt. -> phys. regnum mapping may change
mov pr=r24,-1
ret
END(__ia64_longjmp)
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