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a14c88ba67
Yellow squiggly lines begone! Done automatically on .cpp files through `run-clang-tidy`, with manual corrections to the mistakes. If an import is directly used, but is technically unnecessary since it's recursively imported by something else, it is *not* removed. The tool doesn't touch .h files, so I did some of them by hand while fixing errors due to old recursive imports. Not everything is removed, but the cleanup should be substantial enough. Because this done on Linux, code that isn't used on it is mostly untouched. (Hopefully no open PR is depending on these imports...)
50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "Common/FPURoundMode.h"
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#include "Common/CommonTypes.h"
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#include "Common/Intrinsics.h"
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namespace Common::FPU
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{
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// Get the default SSE states here.
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static u32 saved_sse_state = _mm_getcsr();
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static const u32 default_sse_state = _mm_getcsr();
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void SetSIMDMode(RoundMode rounding_mode, bool non_ieee_mode)
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{
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// OR-mask for disabling FPU exceptions (bits 7-12 in the MXCSR register)
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const u32 EXCEPTION_MASK = 0x1F80;
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// Flush-To-Zero (non-IEEE mode: denormal outputs are set to +/- 0)
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const u32 FTZ = 0x8000;
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// lookup table for FPSCR.RN-to-MXCSR.RC translation
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static const u32 simd_rounding_table[] = {
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(0 << 13) | EXCEPTION_MASK, // nearest
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(3 << 13) | EXCEPTION_MASK, // zero
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(2 << 13) | EXCEPTION_MASK, // +inf
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(1 << 13) | EXCEPTION_MASK, // -inf
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};
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u32 csr = simd_rounding_table[rounding_mode];
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if (non_ieee_mode)
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{
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csr |= FTZ;
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}
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_mm_setcsr(csr);
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}
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void SaveSIMDState()
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{
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saved_sse_state = _mm_getcsr();
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}
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void LoadSIMDState()
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{
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_mm_setcsr(saved_sse_state);
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}
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void LoadDefaultSIMDState()
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{
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_mm_setcsr(default_sse_state);
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}
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} // namespace Common::FPU
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