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Added uint32/64_splat.

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Бранимир Караџић
2025-04-26 19:56:17 -07:00
parent d3d403170e
commit d4096a8446
3 changed files with 76 additions and 0 deletions
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53
include/bx/inline/uint32_t.inl
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@@ -184,6 +184,26 @@ namespace bx
return -!!_a;
}
template<>
inline BX_CONSTEXPR_FUNC uint32_t uint32_splat(uint8_t _val)
{
const uint32_t tmp0 = uint32_sll(_val, 8);
const uint32_t tmp1 = uint32_or(tmp0, _val);
const uint32_t tmp2 = uint32_sll(tmp1, 16);
const uint32_t result = uint32_or(tmp2, tmp1);
return result;
}
template<>
inline BX_CONSTEXPR_FUNC uint32_t uint32_splat(uint16_t _val)
{
const uint32_t tmp = uint32_sll(_val, 16);
const uint32_t result = uint32_or(tmp, _val);
return result;
}
inline BX_CONSTEXPR_FUNC uint32_t uint32_satadd(uint32_t _a, uint32_t _b)
{
const uint32_t add = uint32_add(_a, _b);
@@ -559,6 +579,39 @@ namespace bx
return _a * _b;
}
template<>
inline BX_CONSTEXPR_FUNC uint64_t uint64_splat(uint8_t _val)
{
const uint64_t tmp0 = uint64_sll(_val, 8);
const uint64_t tmp1 = uint64_or(tmp0, _val);
const uint64_t tmp2 = uint64_sll(tmp1, 16);
const uint64_t tmp3 = uint64_or(tmp2, tmp1);
const uint64_t tmp4 = uint64_sll(tmp3, 32);
const uint64_t result = uint64_or(tmp4, tmp3);
return result;
}
template<>
inline BX_CONSTEXPR_FUNC uint64_t uint64_splat(uint16_t _val)
{
const uint64_t tmp0 = uint64_sll(_val, 16);
const uint64_t tmp1 = uint64_or(tmp0, _val);
const uint64_t tmp2 = uint64_sll(tmp1, 32);
const uint64_t result = uint64_or(tmp2, tmp1);
return result;
}
template<>
inline BX_CONSTEXPR_FUNC uint64_t uint64_splat(uint32_t _val)
{
const uint64_t tmp = uint64_sll(_val, 32);
const uint64_t result = uint64_or(tmp, _val);
return result;
}
inline BX_CONSTEXPR_FUNC uint64_t uint64_cntbits(uint64_t _val)
{
#if BX_COMPILER_GCC || BX_COMPILER_CLANG

8
include/bx/uint32_t.h
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@@ -102,6 +102,10 @@ namespace bx
///
BX_CONSTEXPR_FUNC uint32_t uint32_setnz(uint32_t _a);
///
template<typename Ty>
BX_CONSTEXPR_FUNC uint32_t uint32_splat(Ty _val);
///
BX_CONSTEXPR_FUNC uint32_t uint32_satadd(uint32_t _a, uint32_t _b);
@@ -235,6 +239,10 @@ namespace bx
///
BX_CONSTEXPR_FUNC uint64_t uint64_mul(uint64_t _a, uint64_t _b);
///
template<typename Ty>
BX_CONSTEXPR_FUNC uint64_t uint64_splat(Ty _val);
///
BX_CONSTEXPR_FUNC uint64_t uint64_cntbits(uint64_t _val);

15
tests/uint32_test.cpp
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@@ -34,6 +34,21 @@ TEST_CASE("uint32_part", "[uint32_t]")
REQUIRE(UINT32_C(0x09249249) == bx::uint32_part1by2(0x3ff) );
}
TEST_CASE("uint32_splat", "[uint32_t]")
{
REQUIRE(UINT32_C(0x01010101) == bx::uint32_splat<uint8_t>(0x01) );
REQUIRE(UINT32_C(0x55555555) == bx::uint32_splat<uint8_t>(0x55) );
REQUIRE(UINT32_C(0x13891389) == bx::uint32_splat<uint16_t>(0x1389) );
}
TEST_CASE("uint64_splat", "[uint32_t]")
{
REQUIRE(UINT64_C(0x0101010101010101) == bx::uint64_splat<uint8_t>(0x01) );
REQUIRE(UINT64_C(0x5555555555555555) == bx::uint64_splat<uint8_t>(0x55) );
REQUIRE(UINT32_C(0x1389138913891389) == bx::uint64_splat<uint16_t>(0x1389) );
REQUIRE(UINT32_C(0x1506138915061389) == bx::uint64_splat<uint32_t>(0x15061389) );
}
TEST_CASE("uint32_gcd", "[uint32_t]")
{
REQUIRE(1 == bx::uint32_gcd(13, 89) );