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PPU: refactor vector rounding instructions

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Fix: nearbyint -> roundeven
This commit is contained in:
Nekotekina 2022-01-17 11:32:44 +03:00
parent 248f9424ac
commit 14cca55b50
5 changed files with 190 additions and 72 deletions
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150
rpcs3/util/simd.hpp
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@ -14,7 +14,6 @@
#include <immintrin.h>
#include <emmintrin.h>
#include <cmath>
#endif
#if defined(ARCH_ARM64)
@ -22,6 +21,7 @@
#endif
#include <cmath>
#include <math.h>
#include <cfenv>
namespace asmjit
@ -1541,6 +1541,24 @@ inline v128 gv_avgs32(const v128& a, const v128& b)
#endif
}
inline v128 gv_divfs(const v128& a, const v128& b)
{
#if defined(ARCH_X64)
return _mm_div_ps(a, b);
#elif defined(ARCH_ARM64)
return vdivq_f32(a, b);
#endif
}
inline v128 gv_sqrtfs(const v128& a)
{
#if defined(ARCH_X64)
return _mm_sqrt_ps(a);
#elif defined(ARCH_ARM64)
return vsqrtq_f32(a);
#endif
}
inline v128 gv_fmafs(const v128& a, const v128& b, const v128& c)
{
#if defined(ARCH_X64) && defined(__FMA__)
@ -1925,6 +1943,136 @@ inline v128 gv_cvtfs_tou32(const v128& src)
#endif
}
namespace utils
{
inline f32 roundevenf32(f32 arg)
{
u32 val = std::bit_cast<u32>(arg);
u32 exp = (val >> 23) & 0xff;
u32 abs = val & 0x7fffffff;
if (exp >= 127 + 23)
{
// Big enough, NaN or INF
return arg;
}
else if (exp >= 127)
{
u32 int_pos = (127 + 23) - exp;
u32 half_pos = int_pos - 1;
u32 half_bit = 1u << half_pos;
u32 int_bit = 1u << int_pos;
if (val & (int_bit | (half_bit - 1)))
val += half_bit;
val &= ~(int_bit - 1);
}
else if (exp == 126 && abs > 0x3f000000)
{
val &= 0x80000000;
val |= 0x3f800000;
}
else
{
val &= 0x80000000;
}
return std::bit_cast<f32>(val);
}
}
#if defined(ARCH_X64)
template <uint Mode>
inline built_function<__m128(*)(__m128)> sse41_roundf("sse41_roundf", [](native_asm& c, native_args&)
{
static_assert(Mode < 4);
using namespace asmjit;
if (utils::has_avx())
c.vroundps(x86::xmm0, x86::xmm0, 8 + Mode);
else if (utils::has_sse41())
c.roundps(x86::xmm0, x86::xmm0, 8 + Mode);
else
c.jmp(+[](__m128 a) -> __m128
{
v128 r = a;
for (u32 i = 0; i < 4; i++)
if constexpr (Mode == 0)
r._f[i] = utils::roundevenf32(r._f[i]);
else if constexpr (Mode == 1)
r._f[i] = ::floorf(r._f[i]);
else if constexpr (Mode == 2)
r._f[i] = ::ceilf(r._f[i]);
else if constexpr (Mode == 3)
r._f[i] = ::truncf(r._f[i]);
return r;
});
c.ret();
});
#endif
inline v128 gv_roundfs_even(const v128& a)
{
#if defined(__SSE4_1__)
return _mm_round_ps(a, 8 + 0);
#elif defined(ARCH_ARM64)
return vrndnq_f32(a);
#elif defined(ARCH_X64)
return sse41_roundf<0>(a);
#else
v128 r;
for (u32 i = 0; i < 4; i++)
r._f[i] = utils::roundevenf32(a._f[i]);
return r;
#endif
}
inline v128 gv_roundfs_ceil(const v128& a)
{
#if defined(__SSE4_1__)
return _mm_round_ps(a, 8 + 2);
#elif defined(ARCH_ARM64)
return vrndpq_f32(a);
#elif defined(ARCH_X64)
return sse41_roundf<2>(a);
#else
v128 r;
for (u32 i = 0; i < 4; i++)
r._f[i] = ::ceilf(a._f[i]);
return r;
#endif
}
inline v128 gv_roundfs_floor(const v128& a)
{
#if defined(__SSE4_1__)
return _mm_round_ps(a, 8 + 1);
#elif defined(ARCH_ARM64)
return vrndmq_f32(a);
#elif defined(ARCH_X64)
return sse41_roundf<1>(a);
#else
v128 r;
for (u32 i = 0; i < 4; i++)
r._f[i] = ::floorf(a._f[i]);
return r;
#endif
}
inline v128 gv_roundfs_trunc(const v128& a)
{
#if defined(__SSE4_1__)
return _mm_round_ps(a, 8 + 3);
#elif defined(ARCH_ARM64)
return vrndq_f32(a);
#elif defined(ARCH_X64)
return sse41_roundf<3>(a);
#else
v128 r;
for (u32 i = 0; i < 4; i++)
r._f[i] = ::truncf(a._f[i]);
return r;
#endif
}
inline bool gv_testz(const v128& a)
{
#if defined(__SSE4_1__)