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ircd::simd: Add xmmx shifter workaround tools; reorg header.

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This commit is contained in:
Jason Volk 2020-06-24 15:58:02 -07:00
parent 001bd12287
commit 99f203a4b7
1 changed files with 66 additions and 32 deletions
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98
include/ircd/simd.h
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@ -138,43 +138,15 @@ namespace ircd
#endif
//
// other words
// tools
//
namespace ircd
namespace ircd::simd
{
// other words
struct pshuf_imm8;
}
/// Shuffle control structure. This represents an 8-bit immediate operand;
/// note it can only be used if constexprs are allowed in your definition unit.
struct ircd::pshuf_imm8
{
u8 dst3 : 2; // set src idx for word 3
u8 dst2 : 2; // set src idx for word 2
u8 dst1 : 2; // set src idx for word 1
u8 dst0 : 2; // set src idx for word 0
};
//
// util
//
namespace ircd::simd
{
template<class V>
string_view print_lane(const mutable_buffer &buf, const V &) noexcept;
template<class V>
string_view print_reg(const mutable_buffer &buf, const V &) noexcept;
template<class V>
string_view print_mem(const mutable_buffer &buf, const V &) noexcept;
}
// Lane number convenience constants
namespace ircd::simd
{
// lane number convenience constants
extern const u8x32 u8x32_lane_id;
extern const u16x16 u16x16_lane_id;
extern const u8x16 u8x16_lane_id;
@ -185,4 +157,66 @@ namespace ircd::simd
extern const u64x2 u64x2_lane_id;
extern const u256x1 u256x1_lane_id;
extern const u128x1 u128x1_lane_id;
// xmmx shifter workarounds
template<int bits, class T> T shl(const T &a) noexcept;
template<int bits, class T> T shr(const T &a) noexcept;
template<int bits> u128x1 shl(const u128x1 &a) noexcept;
template<int bits> u128x1 shr(const u128x1 &a) noexcept;
// debug print lanes hex
template<class V>
string_view print_lane(const mutable_buffer &buf, const V &) noexcept;
// debug print register hex
template<class V>
string_view print_reg(const mutable_buffer &buf, const V &) noexcept;
// debug print memory hex
template<class V>
string_view print_mem(const mutable_buffer &buf, const V &) noexcept;
}
namespace ircd
{
using simd::shl;
using simd::shr;
}
/// Shuffle control structure. This represents an 8-bit immediate operand;
/// note it can only be used if constexprs are allowed in your definition unit.
struct ircd::simd::pshuf_imm8
{
u8 dst3 : 2; // set src idx for word 3
u8 dst2 : 2; // set src idx for word 2
u8 dst1 : 2; // set src idx for word 1
u8 dst0 : 2; // set src idx for word 0
};
template<int b>
[[using gnu: always_inline, gnu_inline, artificial]]
extern inline ircd::u128x1
ircd::simd::shr(const u128x1 &a)
noexcept
{
static_assert
(
b % 8 == 0, "xmmx register only shifts right at bytewise resolution."
);
return _mm_bsrli_si128(a, b / 8);
}
template<int b>
[[using gnu: always_inline, gnu_inline, artificial]]
extern inline ircd::u128x1
ircd::simd::shl(const u128x1 &a)
noexcept
{
static_assert
(
b % 8 == 0, "xmmx register only shifts right at bytewise resolution."
);
return _mm_bslli_si128(a, b / 8);
}