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JIT: implement frsqrte

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Mostly a straightforward translation of the interpreter code, with a few
tricksy optimizations and fallbacks for rare paths.
This commit is contained in:
Fiora
2014-09-02 20:50:03 -07:00
parent b583879c2a
commit c72a133206
10 changed files with 200 additions and 98 deletions
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23
Source/Core/Core/PowerPC/Gekko.h
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@ -386,6 +386,29 @@ union UReg_MSR
#define FPRF_SHIFT 12
#define FPRF_MASK (0x1F << FPRF_SHIFT)
// FPSCR exception flags
const u32 FPSCR_FX = 1U << (31 - 0);
const u32 FPSCR_FEX = 1U << (31 - 1);
const u32 FPSCR_VX = 1U << (31 - 2);
const u32 FPSCR_OX = 1U << (31 - 3);
const u32 FPSCR_UX = 1U << (31 - 4);
const u32 FPSCR_ZX = 1U << (31 - 5);
const u32 FPSCR_XX = 1U << (31 - 6);
const u32 FPSCR_VXSNAN = 1U << (31 - 7);
const u32 FPSCR_VXISI = 1U << (31 - 8);
const u32 FPSCR_VXIDI = 1U << (31 - 9);
const u32 FPSCR_VXZDZ = 1U << (31 - 10);
const u32 FPSCR_VXIMZ = 1U << (31 - 11);
const u32 FPSCR_VXVC = 1U << (31 - 12);
const u32 FPSCR_VXSOFT = 1U << (31 - 21);
const u32 FPSCR_VXSQRT = 1U << (31 - 22);
const u32 FPSCR_VXCVI = 1U << (31 - 23);
const u32 FPSCR_VX_ANY = FPSCR_VXSNAN | FPSCR_VXISI | FPSCR_VXIDI | FPSCR_VXZDZ | FPSCR_VXIMZ |
FPSCR_VXVC | FPSCR_VXSOFT | FPSCR_VXSQRT | FPSCR_VXCVI;
const u32 FPSCR_ANY_X = FPSCR_OX | FPSCR_UX | FPSCR_ZX | FPSCR_XX | FPSCR_VX_ANY;
// Floating Point Status and Control Register
union UReg_FPSCR
{