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Fix Typedarray.slice fastpath when the content type is matching (#5177)

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This patch fixes #4888.

The implementation is based on PR #4898, only resolved the conflicts and
applied requested changes.

Co-authored-by: Robert Fancsik robert.fancsik@h-lab.eu
JerryScript-DCO-1.0-Signed-off-by: Gergo Csizi gergocs@inf.u-szeged.hu
This commit is contained in:
Gergo Csizi
2024-11-26 14:27:24 +01:00
committed by GitHub
parent 59649fc222
commit ba8957697a
3 changed files with 88 additions and 3 deletions
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jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c
+24 -3
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@@ -1711,14 +1711,35 @@ ecma_builtin_typedarray_prototype_slice (ecma_value_t this_arg, /**< this argume
uint8_t *dst_buffer_p = ecma_typedarray_get_buffer (&new_typedarray_info);
JERRY_ASSERT (new_typedarray_info.offset == 0);
src_buffer_p += relative_start << info_p->shift;
if (info_p->id == new_typedarray_info.id)
{
// 22.2.3.23. Step 22. h-i.
memcpy (dst_buffer_p, src_buffer_p, count << info_p->shift);
if (JERRY_LIKELY (new_typedarray_info.offset == 0))
{
if (info_p->array_buffer_p == new_typedarray_info.array_buffer_p)
{
return new_typedarray;
}
memcpy (dst_buffer_p, src_buffer_p, count << info_p->shift);
}
else
{
uint32_t byte_shift = (uint32_t) (1 << info_p->shift);
while (count)
{
memmove (dst_buffer_p, src_buffer_p, byte_shift);
dst_buffer_p += byte_shift;
src_buffer_p += byte_shift;
count--;
}
}
}
else
{