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ircd::buffer: Minor simplify.

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This commit is contained in:
Jason Volk 2020-07-08 17:20:47 -07:00
parent 23c104a68a
commit ce551e6bd4
1 changed files with 6 additions and 6 deletions
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12
include/ircd/buffer/stream.h
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@ -32,7 +32,7 @@ ircd::buffer::stream_aligned(const mutable_buffer &dst,
const const_buffer &src) const const_buffer &src)
{ {
// Platforms that have non-temporal store support; this is all of x86_64 // Platforms that have non-temporal store support; this is all of x86_64
constexpr bool has_nontemporal_store constexpr bool has_store
{ {
#if defined(__SSE2__) && !defined(RB_GENERIC) #if defined(__SSE2__) && !defined(RB_GENERIC)
true true
@ -43,7 +43,7 @@ ircd::buffer::stream_aligned(const mutable_buffer &dst,
// Platforms that have non-temporal load support; sidenote SSE4.1 can do // Platforms that have non-temporal load support; sidenote SSE4.1 can do
// 16 byte loads and AVX2 can do 32 byte loads; SSE2 cannot do loads. // 16 byte loads and AVX2 can do 32 byte loads; SSE2 cannot do loads.
constexpr bool has_nontemporal_load constexpr bool has_load
{ {
#if defined(__AVX__) && !defined(RB_GENERIC) #if defined(__AVX__) && !defined(RB_GENERIC)
true true
@ -83,7 +83,7 @@ ircd::buffer::stream_aligned(const mutable_buffer &dst,
// When the constexpr conditions aren't favorable we can fallback to // When the constexpr conditions aren't favorable we can fallback to
// normal copy here. // normal copy here.
if constexpr(!has_nontemporal_store && !has_nontemporal_load) if constexpr(!has_store && !has_load)
return copy(dst, src); return copy(dst, src);
// Assert valid arguments // Assert valid arguments
@ -116,14 +116,14 @@ ircd::buffer::stream_aligned(const mutable_buffer &dst,
reinterpret_cast<const block_type *__restrict__>(data(src)) reinterpret_cast<const block_type *__restrict__>(data(src))
}; };
if constexpr(!has_nontemporal_load) if constexpr(!has_load)
#pragma clang loop unroll(disable) #pragma clang loop unroll(disable)
for(size_t i(0); i < latency; ++i) for(size_t i(0); i < latency; ++i)
__builtin_prefetch(in + i, 0, 0); __builtin_prefetch(in + i, 0, 0);
for(size_t i(0); i < copy_lines; i += file_lines) for(size_t i(0); i < copy_lines; i += file_lines)
{ {
if constexpr(!has_nontemporal_load) if constexpr(!has_load)
for(size_t j(0); j < file_lines; ++j) for(size_t j(0); j < file_lines; ++j)
__builtin_prefetch(in + i + latency + j, 0, 0); __builtin_prefetch(in + i + latency + j, 0, 0);
@ -135,7 +135,7 @@ ircd::buffer::stream_aligned(const mutable_buffer &dst,
__builtin_nontemporal_store(block[j], out + i + j); __builtin_nontemporal_store(block[j], out + i + j);
} }
if constexpr(has_nontemporal_store) if constexpr(has_store)
asm volatile ("sfence"); asm volatile ("sfence");
return copy_size; return copy_size;