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Add fast paths for array's fill method #2307

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Merged
MaxGraey merged 2 commits into from
Jun 7, 2022
Merged

Add fast paths for array's fill method #2307

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e286f6a
init
MaxGraey Jun 3, 2022
d1c88b8
Merge branch 'main' into opt-fill-zeros
MaxGraey Jun 7, 2022
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28 changes: 28 additions & 0 deletions std/assembly/array.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -173,6 +173,34 @@ export class Array<T> {
);
}
} else {
if (ASC_SHRINK_LEVEL <= 1) {
if (isInteger<T>()) {
// @ts-ignore
if (value == <T>0 | value == <T>-1) {
if (start < end) {
memory.fill(
ptr + (<usize>start << alignof<T>()),
u8(value),
<usize>(end - start) << alignof<T>()
);
}
return this;
}
} else if (isFloat<T>()) {
// for floating non-negative zeros we can use fast memory.fill
if ((sizeof<T>() == 4 && reinterpret<u32>(f32(value)) == 0) ||
(sizeof<T>() == 8 && reinterpret<u64>(f64(value)) == 0)) {
if (start < end) {
memory.fill(
ptr + (<usize>start << alignof<T>()),
0,
<usize>(end - start) << alignof<T>()
);
}
return this;
}
}
}
for (; start < end; ++start) {
store<T>(ptr + (<usize>start << alignof<T>()), value);
}
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28 changes: 28 additions & 0 deletions std/assembly/staticarray.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -160,6 +160,34 @@ export class StaticArray<T> {
);
}
} else {
if (ASC_SHRINK_LEVEL <= 1) {
if (isInteger<T>()) {
// @ts-ignore
if (value == <T>0 | value == <T>-1) {
if (start < end) {
memory.fill(
ptr + (<usize>start << alignof<T>()),
u8(value),
<usize>(end - start) << alignof<T>()
);
}
return this;
}
} else if (isFloat<T>()) {
// for floating non-negative zeros we can use fast memory.fill
if ((sizeof<T>() == 4 && reinterpret<u32>(f32(value)) == 0) ||
(sizeof<T>() == 8 && reinterpret<u64>(f64(value)) == 0)) {
if (start < end) {
memory.fill(
ptr + (<usize>start << alignof<T>()),
0,
<usize>(end - start) << alignof<T>()
);
}
return this;
}
}
}
for (; start < end; ++start) {
store<T>(ptr + (<usize>start << alignof<T>()), value);
}
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28 changes: 28 additions & 0 deletions std/assembly/typedarray.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1571,6 +1571,34 @@ function FILL<TArray extends ArrayBufferView, T extends number>(
if (sizeof<T>() == 1) {
if (start < end) memory.fill(ptr + <usize>start, <u8>value, <usize>(end - start));
} else {
if (ASC_SHRINK_LEVEL <= 1) {
if (isInteger<T>()) {
// @ts-ignore
if (value == <T>0 | value == <T>-1) {
if (start < end) {
memory.fill(
ptr + (<usize>start << alignof<T>()),
u8(value),
<usize>(end - start) << alignof<T>()
);
}
return array;
}
} else if (isFloat<T>()) {
// for floating non-negative zeros we can use fast memory.fill
if ((sizeof<T>() == 4 && reinterpret<u32>(f32(value)) == 0) ||
(sizeof<T>() == 8 && reinterpret<u64>(f64(value)) == 0)) {
if (start < end) {
memory.fill(
ptr + (<usize>start << alignof<T>()),
0,
<usize>(end - start) << alignof<T>()
);
}
return array;
}
}
}
for (; start < end; ++start) {
store<T>(ptr + (<usize>start << alignof<T>()), value);
}
Expand Down
8 changes: 4 additions & 4 deletions tests/compiler/std-wasi/crypto.debug.wat
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Original file line number Diff line number Diff line change
Expand Up @@ -4920,7 +4920,7 @@
if
i32.const 448
i32.const 656
i32.const 1870
i32.const 1898
i32.const 5
call $~lib/wasi/index/abort
unreachable
Expand All @@ -4939,7 +4939,7 @@
if
i32.const 144
i32.const 656
i32.const 1875
i32.const 1903
i32.const 9
call $~lib/wasi/index/abort
unreachable
Expand All @@ -4951,7 +4951,7 @@
else
i32.const 144
i32.const 656
i32.const 1879
i32.const 1907
i32.const 7
call $~lib/wasi/index/abort
unreachable
Expand All @@ -4969,7 +4969,7 @@
if
i32.const 144
i32.const 656
i32.const 1884
i32.const 1912
i32.const 7
call $~lib/wasi/index/abort
unreachable
Expand Down
6 changes: 3 additions & 3 deletions tests/compiler/std-wasi/crypto.release.wat
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Original file line number Diff line number Diff line change
Expand Up @@ -3717,7 +3717,7 @@
if
i32.const 1472
i32.const 1680
i32.const 1870
i32.const 1898
i32.const 5
call $~lib/wasi/index/abort
unreachable
Expand All @@ -3736,7 +3736,7 @@
else
i32.const 1168
i32.const 1680
i32.const 1879
i32.const 1907
i32.const 7
call $~lib/wasi/index/abort
unreachable
Expand All @@ -3751,7 +3751,7 @@
if
i32.const 1168
i32.const 1680
i32.const 1884
i32.const 1912
i32.const 7
call $~lib/wasi/index/abort
unreachable
Expand Down
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