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Code Issues Releases Wiki Activity

ircd::json: Replace simd::lateral used at inefficient lane types.

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This commit is contained in:
Jason Volk 2020-09-27 23:36:15 -07:00
parent 9cee52fff0
commit 742c29500f
1 changed files with 3 additions and 18 deletions
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21
ircd/json.cc
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@ -580,12 +580,7 @@ noexcept
is_esc | is_quote | is_ctrl
};
const block_t is_regular
{
simd::lateral<std::bit_and>(~is_special)
};
if(likely(is_regular[0]))
if(likely(simd::all(~is_special)))
return u64x2
{
0, sizeof(block)
@ -3510,13 +3505,8 @@ ircd::json::string_stringify(u8x16 &block,
is_esc | is_quote | is_ctrl
};
const u8x16 any_special
{
simd::lateral<std::bit_or>(is_special | ~block_mask)
};
// Fastest-path; backward branch to count and consume all of the input.
if(likely(!any_special[0]))
if(likely(!simd::any(is_special | ~block_mask)))
return u64x2
{
sizeof(u8x16), sizeof(u8x16)
@ -3747,13 +3737,8 @@ ircd::json::string_serialized(const u8x16 block,
is_esc | is_quote | is_ctrl
};
const u8x16 any_special
{
simd::lateral<std::bit_or>(is_special | ~block_mask)
};
// Fastest-path; backward branch to count and consume all of the input.
if(likely(!any_special[0]))
if(likely(!simd::any(is_special | ~block_mask)))
return u64x2
{
sizeof(u8x16), sizeof(u8x16)