;; GCC machine description for C6X synchronization instructions.
;; Copyright (C) 2011-2014 Free Software Foundation, Inc.
;;
;; This file is part of GCC.
;;
;; GCC is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;;
;; GCC 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 General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GCC; see the file COPYING3. If not see
;; .
;; C64X+ has atomic instructions, but they are not atomic on all
;; devices and have other problems. We use normal loads and stores,
;; and place them in overlapping branch shadows to ensure interrupts
;; are disabled during the sequence, which guarantees atomicity on all
;; single-core systems.
(define_code_iterator FETCHOP [plus minus ior xor and])
(define_code_attr fetchop_name
[(plus "add") (minus "sub") (ior "ior") (xor "xor") (and "and")])
(define_code_attr fetchop_pred
[(plus "reg_or_scst5_operand") (minus "register_operand")
(ior "reg_or_scst5_operand") (xor "reg_or_scst5_operand")
(and "reg_or_scst5_operand")])
(define_code_attr fetchop_constr
[(plus "bIs5") (minus "b") (ior "bIs5") (xor "bIs5") (and "bIs5")])
(define_code_attr fetchop_opcode
[(plus "add") (minus "sub") (ior "or") (xor "xor") (and "and")])
(define_code_attr fetchop_inops02
[(plus "%2, %0") (minus "%0, %2") (ior "%2, %0") (xor "%2, %0")
(and "%2, %0")])
(define_code_attr fetchop_inops21
[(plus "%1, %2") (minus "%2, %1") (ior "%1, %2") (xor "%1, %2")
(and "%1, %2")])
(define_expand "sync_compare_and_swapsi"
[(parallel
[(set (match_operand:SI 0 "register_operand" "")
(match_operand:SI 1 "memory_operand" ""))
(set (match_dup 1)
(unspec_volatile:SI
[(match_operand:SI 2 "register_operand" "")
(match_operand:SI 3 "register_operand" "")]
UNSPECV_CAS))
(clobber (match_scratch:SI 4 ""))])]
""
{
})
(define_expand "sync_si"
[(parallel
[(set (match_operand:SI 0 "memory_operand" "")
(unspec:SI
[(FETCHOP:SI (match_dup 0)
(match_operand:SI 1 "" ""))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 2 ""))])]
""
{
})
(define_expand "sync_old_si"
[(parallel
[(set (match_operand:SI 0 "register_operand" "")
(match_operand:SI 1 "memory_operand" ""))
(set (match_dup 1)
(unspec:SI
[(FETCHOP:SI (match_dup 1)
(match_operand:SI 2 "" ""))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 3 ""))])]
""
{
})
(define_expand "sync_new_si"
[(parallel
[(set (match_operand:SI 0 "register_operand" "")
(FETCHOP:SI (match_operand:SI 1 "memory_operand" "")
(match_operand:SI 2 "" "")))
(set (match_dup 1)
(unspec:SI [(FETCHOP:SI (match_dup 1) (match_dup 2))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 3 ""))])]
""
{
})
(define_expand "sync_nandsi"
[(parallel
[(set (match_operand:SI 0 "memory_operand" "")
(unspec:SI
[(not:SI (and:SI (match_dup 0)
(match_operand:SI 1 "reg_or_scst5_operand" "")))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 2 ""))])]
""
{
})
(define_expand "sync_old_nandsi"
[(parallel
[(set (match_operand:SI 0 "register_operand" "")
(match_operand:SI 1 "memory_operand" ""))
(set (match_dup 1)
(unspec:SI
[(not:SI (and:SI (match_dup 1)
(match_operand:SI 2 "reg_or_scst5_operand" "")))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 3 ""))])]
""
{
})
(define_expand "sync_new_nandsi"
[(parallel
[(set (match_operand:SI 0 "register_operand" "")
(not:SI (and:SI (match_operand:SI 1 "memory_operand" "")
(match_operand:SI 2 "reg_or_scst5_operand" ""))))
(set (match_dup 1)
(unspec:SI [(not:SI (and:SI (match_dup 1) (match_dup 2)))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 3 ""))])]
""
{
})
(define_insn "*sync_compare_and_swapsi"
[(set (match_operand:SI 0 "register_operand" "=&b")
(match_operand:SI 1 "memory_operand" "+m"))
(set (match_dup 1)
(unspec_volatile:SI
[(match_operand:SI 2 "register_operand" "B")
(match_operand:SI 3 "register_operand" "b")]
UNSPECV_CAS))
(clobber (match_scratch:SI 4 "=&B"))]
""
"0: b .s2 1f ; 0\n\\
|| ldw .d%U1t%U0 %1, %0\n\\
nop 4\n\\
|| b .s2 2f ; 1\n\\
cmpeq .l2 %0, %2, %2 ; 5\n\\
1: [%2] stw .d%U1t%U3 %3, %1 ; 6\n\\
2:"
[(set_attr "type" "atomic")])
(define_insn "sync_si_insn"
[(set (match_operand:SI 0 "memory_operand" "+m")
(unspec:SI
[(FETCHOP:SI (match_dup 0)
(match_operand:SI 1 "" ""))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 2 "=&B"))]
""
"0: b .s2 1f ; 0\n\\
|| ldw .d%U0t%U2 %0, %2\n\\
nop 4\n\\
|| b .s2 2f ; 1\n\\
.l2 , %2 ; 5\n\\
1: stw .d%U0t%U2 %2, %0 ; 6\n\\
2:"
[(set_attr "type" "atomic")])
(define_insn "sync_old_si_insn"
[(set (match_operand:SI 0 "register_operand" "=&b")
(match_operand:SI 1 "memory_operand" "+m"))
(set (match_dup 1)
(unspec:SI
[(FETCHOP:SI (match_dup 1)
(match_operand:SI 2 "" ""))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 3 "=&B"))]
""
"0: b .s2 1f ; 0\n\\
|| ldw .d%U1t%U0 %1, %0\n\\
nop 4\n\\
|| b .s2 2f ; 1\n\\
.l2 , %3 ; 5\n\\
1: stw .d%U1t%U3 %3, %1 ; 6\n\\
2:"
[(set_attr "type" "atomic")])
(define_insn "sync_new_si_insn"
[(set (match_operand:SI 0 "register_operand" "=&b")
(FETCHOP:SI (match_operand:SI 1 "memory_operand" "+m")
(match_operand:SI 2 "" "")))
(set (match_dup 1)
(unspec:SI
[(FETCHOP:SI (match_dup 1)
(match_dup 2))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 3 "=&B"))]
""
"0: b .s2 1f ; 0\n\\
|| ldw .d%U1t%U0 %1, %0\n\\
nop 4\n\\
|| b .s2 2f ; 1\n\\
.l2 , %0 ; 5\n\\
1: stw .d%U1t%U0 %0, %1 ; 6\n\\
2:"
[(set_attr "type" "atomic")])
(define_insn "sync_nandsi_insn"
[(set (match_operand:SI 0 "memory_operand" "+m")
(unspec:SI
[(not:SI (and:SI (match_dup 0)
(match_operand:SI 1 "reg_or_scst5_operand" "bIs5")))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 2 "=&B"))]
""
"0: b .s2 1f ; 0\n\\
|| ldw .d%U0t%U2 %0, %2\n\\
nop 1\n\\
nop 3\n\\
|| b .s2 2f ; 2\n\\
and .l2 %1, %2, %2 ; 5\n\\
1: not .l2 %2, %2 ; 6\n\\
stw .d%U0t%U2 %2, %0 ; 7\n\\
2:"
[(set_attr "type" "atomic")])
(define_insn "sync_old_nandsi_insn"
[(set (match_operand:SI 0 "register_operand" "=&b")
(match_operand:SI 1 "memory_operand" "+m"))
(set (match_dup 1)
(unspec:SI
[(not:SI (and:SI (match_dup 1)
(match_operand:SI 2 "reg_or_scst5_operand" "bIs5")))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 3 "=&B"))]
""
"0: b .s2 1f ; 0\n\\
|| ldw .d%U1t%U0 %1, %0\n\\
nop 1\n\\
nop 3\n\\
|| b .s2 2f ; 2\n\\
and .l2 %2, %0, %3 ; 5\n\\
1: not .l2 %3, %3 ; 6\n\\
stw .d%U1t%U3 %3, %1 ; 7\n\\
2:"
[(set_attr "type" "atomic")])
(define_insn "sync_new_nandsi_insn"
[(set (match_operand:SI 0 "register_operand" "=&b")
(not:SI (and:SI (match_operand:SI 1 "memory_operand" "+m")
(match_operand:SI 2 "reg_or_scst5_operand" "bIs5"))))
(set (match_dup 1)
(unspec:SI
[(not:SI (and:SI (match_dup 1) (match_dup 2)))]
UNSPEC_ATOMIC))
(clobber (match_scratch:SI 3 "=&B"))]
""
"0: b .s2 1f ; 0\n\\
|| ldw .d%U1t%U0 %1, %0\n\\
nop 1\n\\
nop 3\n\\
|| b .s2 2f ; 2\n\\
and .l2 %2, %0, %0 ; 5\n\\
1: not .l2 %0, %0 ; 6\n\\
stw .d%U1t%U0 %0, %1 ; 7\n\\
2:"
[(set_attr "type" "atomic")])