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vchuravyvchuravy
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implement syncscopes everywhere
1 parent 6d6192f commit 0217a90

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3 files changed

+161
-125
lines changed

3 files changed

+161
-125
lines changed

‎src/UnsafeAtomics.jl

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -27,7 +27,7 @@ module Internal
2727
using Base.Sys: WORD_SIZE
2828
using Base: bitcast, llvmcall
2929

30-
using ..UnsafeAtomics: UnsafeAtomics, Ordering, right
30+
using ..UnsafeAtomics: UnsafeAtomics, Ordering, SyncScope, right
3131

3232
include("utils.jl")
3333
include("orderings.jl")

‎src/core.jl

Lines changed: 151 additions & 122 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
@inline UnsafeAtomics.store!(x, v, ord) = UnsafeAtomics.store!(x, v, ord, none)
99
@inline UnsafeAtomics.cas!(x, cmp, new, ord) = UnsafeAtomics.cas!(x, cmp, new, ord, ord, none)
1010
@inline UnsafeAtomics.modify!(ptr, op, x, ord) = UnsafeAtomics.modify!(ptr, op, x, ord, none)
11-
@inline UnsafeAtomics.fence(ord) = UnsafeAtomics.fence(ord., none)
11+
@inline UnsafeAtomics.fence(ord) = UnsafeAtomics.fence(ord, none)
1212

1313
#! format: off
1414
# https://github.com/JuliaLang/julia/blob/v1.6.3/base/atomics.jl#L23-L30
@@ -74,47 +74,51 @@ for typ in (inttypes..., floattypes...)
7474
for ord in orderings
7575
ord in (release, acq_rel) && continue
7676

77-
if ATOMIC_INTRINSICS && sizeof(typ) <= MAX_POINTERATOMIC_SIZE
78-
@eval function UnsafeAtomics.load(x::Ptr{$typ}, ::$(typeof(ord)))
79-
return Core.Intrinsics.atomic_pointerref(x, base_ordering($ord))
80-
end
81-
else
82-
@eval function UnsafeAtomics.load(x::Ptr{$typ}, ::$(typeof(ord)))
83-
return llvmcall(
84-
$("""
85-
%ptr = inttoptr i$WORD_SIZE %0 to $lt*
86-
%rv = load atomic $rt %ptr $ord, align $(sizeof(typ))
87-
ret $lt %rv
88-
"""),
89-
$typ,
90-
Tuple{Ptr{$typ}},
91-
x,
92-
)
77+
for sync in syncscopes
78+
if ATOMIC_INTRINSICS && sizeof(typ) <= MAX_POINTERATOMIC_SIZE && sync == none
79+
@eval function UnsafeAtomics.load(x::Ptr{$typ}, ::$(typeof(ord)), ::$(typeof(sync)))
80+
return Core.Intrinsics.atomic_pointerref(x, base_ordering($ord))
81+
end
82+
else
83+
@eval function UnsafeAtomics.load(x::Ptr{$typ}, ::$(typeof(ord)), ::$(typeof(sync)))
84+
return llvmcall(
85+
$("""
86+
%ptr = inttoptr i$WORD_SIZE %0 to $lt*
87+
%rv = load atomic $rt %ptr $ord, align $(sizeof(typ))
88+
ret $lt %rv
89+
"""),
90+
$typ,
91+
Tuple{Ptr{$typ}},
92+
x,
93+
)
94+
end
9395
end
9496
end
9597
end
9698

9799
for ord in orderings
98100
ord in (acquire, acq_rel) && continue
99-
100-
if ATOMIC_INTRINSICS && sizeof(typ) <= MAX_POINTERATOMIC_SIZE
101-
@eval function UnsafeAtomics.store!(x::Ptr{$typ}, v::$typ, ::$(typeof(ord)))
102-
Core.Intrinsics.atomic_pointerset(x, v, base_ordering($ord))
103-
return nothing
104-
end
105-
else
106-
@eval function UnsafeAtomics.store!(x::Ptr{$typ}, v::$typ, ::$(typeof(ord)))
107-
return llvmcall(
108-
$("""
109-
%ptr = inttoptr i$WORD_SIZE %0 to $lt*
110-
store atomic $lt %1, $lt* %ptr $ord, align $(sizeof(typ))
111-
ret void
112-
"""),
113-
Cvoid,
114-
Tuple{Ptr{$typ},$typ},
115-
x,
116-
v,
117-
)
101+
102+
for sync in syncscopes
103+
if ATOMIC_INTRINSICS && sizeof(typ) <= MAX_POINTERATOMIC_SIZE && sync == none
104+
@eval function UnsafeAtomics.store!(x::Ptr{$typ}, v::$typ, ::$(typeof(ord)), ::$(typeof(sync)))
105+
Core.Intrinsics.atomic_pointerset(x, v, base_ordering($ord))
106+
return nothing
107+
end
108+
else
109+
@eval function UnsafeAtomics.store!(x::Ptr{$typ}, v::$typ, ::$(typeof(ord)), ::$(typeof(sync)))
110+
return llvmcall(
111+
$("""
112+
%ptr = inttoptr i$WORD_SIZE %0 to $lt*
113+
store atomic $lt %1, $lt* %ptr $ord, align $(sizeof(typ))
114+
ret void
115+
"""),
116+
Cvoid,
117+
Tuple{Ptr{$typ},$typ},
118+
x,
119+
v,
120+
)
121+
end
118122
end
119123
end
120124
end
@@ -124,54 +128,58 @@ for typ in (inttypes..., floattypes...)
124128

125129
typ <: AbstractFloat && break
126130

127-
if ATOMIC_INTRINSICS && sizeof(typ) <= MAX_POINTERATOMIC_SIZE
128-
@eval function UnsafeAtomics.cas!(
129-
x::Ptr{$typ},
130-
cmp::$typ,
131-
new::$typ,
132-
::$(typeof(success_ordering)),
133-
::$(typeof(failure_ordering)),
134-
)
135-
return Core.Intrinsics.atomic_pointerreplace(
136-
x,
137-
cmp,
138-
new,
139-
base_ordering($success_ordering),
140-
base_ordering($failure_ordering)
131+
for sync in syncscopes
132+
if ATOMIC_INTRINSICS && sizeof(typ) <= MAX_POINTERATOMIC_SIZE && sync == none
133+
@eval function UnsafeAtomics.cas!(
134+
x::Ptr{$typ},
135+
cmp::$typ,
136+
new::$typ,
137+
::$(typeof(success_ordering)),
138+
::$(typeof(failure_ordering)),
139+
::$(typeof(sync)),
141140
)
142-
end
143-
else
144-
@eval function UnsafeAtomics.cas!(
145-
x::Ptr{$typ},
146-
cmp::$typ,
147-
new::$typ,
148-
::$(typeof(success_ordering)),
149-
::$(typeof(failure_ordering)),
150-
)
151-
success = Ref{Int8}()
152-
GC.@preserve success begin
153-
old = llvmcall(
154-
$(
155-
"""
156-
%ptr = inttoptr i$WORD_SIZE %0 to $lt*
157-
%rs = cmpxchg $lt* %ptr, $lt %1, $lt %2 $success_ordering $failure_ordering
158-
%rv = extractvalue { $lt, i1 } %rs, 0
159-
%s1 = extractvalue { $lt, i1 } %rs, 1
160-
%s8 = zext i1 %s1 to i8
161-
%sptr = inttoptr i$WORD_SIZE %3 to i8*
162-
store i8 %s8, i8* %sptr
163-
ret $lt %rv
164-
"""
165-
),
166-
$typ,
167-
Tuple{Ptr{$typ},$typ,$typ,Ptr{Int8}},
141+
return Core.Intrinsics.atomic_pointerreplace(
168142
x,
169143
cmp,
170144
new,
171-
Ptr{Int8}(pointer_from_objref(success)),
145+
base_ordering($success_ordering),
146+
base_ordering($failure_ordering)
172147
)
173148
end
174-
return (old = old, success = !iszero(success[]))
149+
else
150+
@eval function UnsafeAtomics.cas!(
151+
x::Ptr{$typ},
152+
cmp::$typ,
153+
new::$typ,
154+
::$(typeof(success_ordering)),
155+
::$(typeof(failure_ordering)),
156+
::$(typeof(sync)),
157+
)
158+
success = Ref{Int8}()
159+
GC.@preserve success begin
160+
old = llvmcall(
161+
$(
162+
"""
163+
%ptr = inttoptr i$WORD_SIZE %0 to $lt*
164+
%rs = cmpxchg $lt* %ptr, $lt %1, $lt %2 $success_ordering $failure_ordering
165+
%rv = extractvalue { $lt, i1 } %rs, 0
166+
%s1 = extractvalue { $lt, i1 } %rs, 1
167+
%s8 = zext i1 %s1 to i8
168+
%sptr = inttoptr i$WORD_SIZE %3 to i8*
169+
store i8 %s8, i8* %sptr
170+
ret $lt %rv
171+
"""
172+
),
173+
$typ,
174+
Tuple{Ptr{$typ},$typ,$typ,Ptr{Int8}},
175+
x,
176+
cmp,
177+
new,
178+
Ptr{Int8}(pointer_from_objref(success)),
179+
)
180+
end
181+
return (old = old, success = !iszero(success[]))
182+
end
175183
end
176184
end
177185
end
@@ -193,60 +201,81 @@ for typ in (inttypes..., floattypes...)
193201
end
194202
end
195203
for ord in orderings
196-
# Enable this code iff https://github.com/JuliaLang/julia/pull/45122 get's merged
197-
if false && ATOMIC_INTRINSICS && sizeof(typ) <= MAX_POINTERATOMIC_SIZE
198-
@eval function UnsafeAtomics.modify!(
204+
for sync in syncscopes
205+
# Enable this code iff https://github.com/JuliaLang/julia/pull/45122 get's merged
206+
if false && ATOMIC_INTRINSICS && sizeof(typ) <= MAX_POINTERATOMIC_SIZE && sync == none
207+
@eval function UnsafeAtomics.modify!(
208+
x::Ptr{$typ},
209+
op::typeof($op),
210+
v::$typ,
211+
::$(typeof(ord)),
212+
::$(typeof(sync)),
213+
)
214+
return Core.Intrinsics.atomic_pointermodify(x, op, v, base_ordering($ord))
215+
end
216+
else
217+
@eval function UnsafeAtomics.modify!(
199218
x::Ptr{$typ},
200-
op::typeof($op),
219+
::typeof($op),
201220
v::$typ,
202221
::$(typeof(ord)),
222+
::$(typeof(sync)),
203223
)
204-
return Core.Intrinsics.atomic_pointermodify(x, op, v, base_ordering($ord))
205-
end
206-
else
207-
@eval function UnsafeAtomics.modify!(
208-
x::Ptr{$typ},
209-
::typeof($op),
210-
v::$typ,
211-
::$(typeof(ord)),
212-
)
213-
old = llvmcall(
214-
$("""
215-
%ptr = inttoptr i$WORD_SIZE %0 to $lt*
216-
%rv = atomicrmw $rmw $lt* %ptr, $lt %1 $ord
217-
ret $lt %rv
218-
"""),
219-
$typ,
220-
Tuple{Ptr{$typ},$typ},
221-
x,
222-
v,
223-
)
224-
return old => $op(old, v)
224+
old = llvmcall(
225+
$("""
226+
%ptr = inttoptr i$WORD_SIZE %0 to $lt*
227+
%rv = atomicrmw $rmw $lt* %ptr, $lt %1 $ord
228+
ret $lt %rv
229+
"""),
230+
$typ,
231+
Tuple{Ptr{$typ},$typ},
232+
x,
233+
v,
234+
)
235+
return old => $op(old, v)
236+
end
225237
end
226238
end
227239
end
228240
end
229241
end
230242

231-
# Core.Intrinsics.atomic_fence was introduced in 1.10
232-
function UnsafeAtomics.fence(ord::Ordering)
233-
Core.Intrinsics.atomic_fence(base_ordering(ord))
234-
return nothing
235-
end
236-
if Sys.ARCH == :x86_64
237-
# FIXME: Disable this once on LLVM 19
238-
# This is unfortunatly required for good-performance on AMD
239-
# https://github.com/llvm/llvm-project/pull/106555
240-
function UnsafeAtomics.fence(::typeof(seq_cst))
241-
Base.llvmcall(
242-
(raw"""
243-
define void @fence() #0 {
244-
entry:
245-
tail call void asm sideeffect "lock orq $$0 , (%rsp)", ""(); should this have ~{memory}
246-
ret void
247-
}
248-
attributes #0 = { alwaysinline }
249-
""", "fence"), Nothing, Tuple{})
243+
for sync in syncscopes
244+
if sync == none
245+
# Core.Intrinsics.atomic_fence was introduced in 1.10
246+
@eval function UnsafeAtomics.fence(ord::Ordering, ::$(typeof(sync)))
247+
Core.Intrinsics.atomic_fence(base_ordering(ord))
248+
return nothing
249+
end
250+
if Sys.ARCH == :x86_64
251+
# FIXME: Disable this once on LLVM 19
252+
# This is unfortunatly required for good-performance on AMD
253+
# https://github.com/llvm/llvm-project/pull/106555
254+
@eval function UnsafeAtomics.fence(::typeof(seq_cst), ::$(typeof(sync)))
255+
Base.llvmcall(
256+
(raw"""
257+
define void @fence() #0 {
258+
entry:
259+
tail call void asm sideeffect "lock orq $$0 , (%rsp)", ""(); should this have ~{memory}
260+
ret void
261+
}
262+
attributes #0 = { alwaysinline }
263+
""", "fence"), Nothing, Tuple{})
264+
end
265+
end
266+
else
267+
for ord in orderings
268+
@eval function UnsafeAtomics.fence(::$(typeof(ord)), ::$(typeof(sync)))
269+
return llvmcall(
270+
$("""
271+
fence $sync $ord
272+
ret void
273+
"""),
274+
Cvoid,
275+
Tuple{},
276+
)
277+
end
278+
end
250279
end
251280
end
252281

‎src/syncscopes.jl

Lines changed: 9 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1,9 +1,16 @@
11
struct LLVMSyncScope{name} <: SyncScope end
22

3-
const none = LLVMSyncScope{Symbol("")}()
3+
const none = LLVMSyncScope{:none}()
44
const singlethread = LLVMSyncScope{:singlethread}()
55

6+
const syncscopes = (none, singlethread)
7+
const ConcreteSyncScopes = Union{map(typeof, syncscopes)...}
8+
69
llvm_syncscope(::LLVMSyncScope{name}) where {name} = name
710

8-
Base.string(s::LLVMSyncScope) = String(llvm_syncscope(s))
11+
Base.string(s::LLVMSyncScope) = string("syncscope(\"", llvm_syncscope(s), "\")")
12+
Base.string(s::typeof(none)) = ""
13+
914
Base.print(io::IO, s::LLVMSyncScope) = print(io, string(s))
15+
16+
Base.show(io::IO, o::ConcreteSyncScopes) = print(io, UnsafeAtomics, '.', llvm_ordering(o))

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