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98 lines
4.4 KiB
TableGen
98 lines
4.4 KiB
TableGen
//======--- SPUMathInst.td - Cell SPU math operations -*- tablegen -*---======//
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//
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// Cell SPU math operations
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//
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// This target description file contains instruction sequences for various
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// math operations, such as vector multiplies, i32 multiply, etc., for the
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// SPU's i32, i16 i8 and corresponding vector types.
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//
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// Any resemblance to libsimdmath or the Cell SDK simdmath library is
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// purely and completely coincidental.
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//===----------------------------------------------------------------------===//
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//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
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// v16i8 multiply instruction sequence:
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//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
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def : Pat<(mul (v16i8 VECREG:$rA), (v16i8 VECREG:$rB)),
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(ORv4i32
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(ANDv4i32
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(SELBv4i32 (MPYv8i16 VECREG:$rA, VECREG:$rB),
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(SHLHIv8i16 (MPYv8i16 (ROTMAHIv8i16 VECREG:$rA, 8),
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(ROTMAHIv8i16 VECREG:$rB, 8)), 8),
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(FSMBIv8i16 0x2222)),
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(ILAv4i32 0x0000ffff)),
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(SHLIv4i32
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(SELBv4i32 (MPYv8i16 (ROTMAIv4i32_i32 VECREG:$rA, 16),
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(ROTMAIv4i32_i32 VECREG:$rB, 16)),
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(SHLHIv8i16 (MPYv8i16 (ROTMAIv4i32_i32 VECREG:$rA, 8),
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(ROTMAIv4i32_i32 VECREG:$rB, 8)), 8),
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(FSMBIv8i16 0x2222)), 16))>;
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//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
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// v8i16 multiply instruction sequence:
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//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
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def : Pat<(mul (v8i16 VECREG:$rA), (v8i16 VECREG:$rB)),
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(SELBv8i16 (MPYv8i16 VECREG:$rA, VECREG:$rB),
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(SHLIv4i32 (MPYHHv8i16 VECREG:$rA, VECREG:$rB), 16),
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(FSMBIv8i16 0xcccc))>;
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//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
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// v4i32, i32 multiply instruction sequence:
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//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
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def MPYv4i32:
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Pat<(mul (v4i32 VECREG:$rA), (v4i32 VECREG:$rB)),
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(Av4i32
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(Av4i32 (MPYHv4i32 VECREG:$rA, VECREG:$rB),
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(MPYHv4i32 VECREG:$rB, VECREG:$rA)),
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(MPYUv4i32 VECREG:$rA, VECREG:$rB))>;
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def MPYi32:
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Pat<(mul R32C:$rA, R32C:$rB),
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(Ar32
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(Ar32 (MPYHr32 R32C:$rA, R32C:$rB),
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(MPYHr32 R32C:$rB, R32C:$rA)),
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(MPYUr32 R32C:$rA, R32C:$rB))>;
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//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
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// f32, v4f32 divide instruction sequence:
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//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
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// Reciprocal estimate and interpolation
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def Interpf32: CodeFrag<(FIf32 R32FP:$rB, (FRESTf32 R32FP:$rB))>;
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// Division estimate
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def DivEstf32: CodeFrag<(FMf32 R32FP:$rA, Interpf32.Fragment)>;
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// Newton-Raphson iteration
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def NRaphf32: CodeFrag<(FMAf32 (FNMSf32 DivEstf32.Fragment, R32FP:$rB, R32FP:$rA),
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Interpf32.Fragment,
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DivEstf32.Fragment)>;
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// Epsilon addition
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def Epsilonf32: CodeFrag<(AIf32 NRaphf32.Fragment, 1)>;
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def : Pat<(fdiv R32FP:$rA, R32FP:$rB),
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(SELBf32_cond NRaphf32.Fragment,
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Epsilonf32.Fragment,
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(CGTIf32 (FNMSf32 R32FP:$rB, Epsilonf32.Fragment, R32FP:$rA), -1))>;
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// Reciprocal estimate and interpolation
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def Interpv4f32: CodeFrag<(FIv4f32 (v4f32 VECREG:$rB), (FRESTv4f32 (v4f32 VECREG:$rB)))>;
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// Division estimate
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def DivEstv4f32: CodeFrag<(FMv4f32 (v4f32 VECREG:$rA), Interpv4f32.Fragment)>;
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// Newton-Raphson iteration
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def NRaphv4f32: CodeFrag<(FMAv4f32 (FNMSv4f32 DivEstv4f32.Fragment,
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(v4f32 VECREG:$rB),
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(v4f32 VECREG:$rA)),
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Interpv4f32.Fragment,
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DivEstv4f32.Fragment)>;
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// Epsilon addition
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def Epsilonv4f32: CodeFrag<(AIv4f32 NRaphv4f32.Fragment, 1)>;
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def : Pat<(fdiv (v4f32 VECREG:$rA), (v4f32 VECREG:$rB)),
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(SELBv4f32_cond NRaphv4f32.Fragment,
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Epsilonv4f32.Fragment,
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(CGTIv4f32 (FNMSv4f32 (v4f32 VECREG:$rB),
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Epsilonv4f32.Fragment,
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(v4f32 VECREG:$rA)), -1))>;
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