Fix Frecpe_S/V and Frsqrte_S/V (full FP emu.). Add Sse Opt. & SoftFloat Impl. for Fcmeq/ge/gt/le/lt_S/V (Reg & Zero), Faddp_S/V, Fmaxp_V, Fminp_V Inst.; add Sse Opt. for Shll_V, S/Ushll_V Inst.; improve Sse Opt. for Xtn_V Inst.. Add Tests.

[LDj3SNuD]

Added Fast (Intrinsics) & Slow (SoftFloat) paths:

InstEmitSimdCmp:

Fcmeq, Fcmge, Fcmgt, Fcmle, Fcmlt (Scalar & Vector, Reg & Zero):

• Max Sse Req.: Sse2
• Types Covered: All

InstEmitSimdArithmetic:

Faddp_S:

• Max Sse Req.: Sse3
• Types Covered: All

Faddp_V;
Fmaxp_V, Fminp_V:

• Max Sse Req.: Sse2
• Types Covered: All

Added Fast (Intrinsics) paths:

InstEmitSimdShift:

Shll_V;
Sshll_V, Ushll_V:

• Max Sse Req.: Sse41
• Types Covered: All

InstEmitSimdMove:

Xtn_V (improved):

• Max Sse Req.: Ssse3
• Types Covered: All

Tests provided for all instructions involved.

Nits.

[LDj3SNuD]

InstEmitSimdArithmetic:

Fixed Frecpe_S/V and Frsqrte_S/V (full FP emu.).

Tests provided for all instructions involved.

Nits.

[LDj3SNuD]

Added Fast (Intrinsics) & Slow (SoftFloat) paths:

InstEmitSimdArithmetic:

Fabd_S;
Fabd_V:

• Max Sse Req.: Sse2
• Types Covered: All

Tests provided for all instructions involved.

[LDj3SNuD]

Added Fast (Intrinsics) paths:

InstEmitSimdArithmetic:

Frecpe_S, Frsqrte_S;
Frecpe_V, Frsqrte_V:

• Max Sse Req.: Sse
• Types Covered: S

Re-tested all instructions involved.

[gdkchan]

It's a bit weird to me that a function called ZerosOrOnes with a zeros arguments, returns zero when the argument is false and not true.

[LDj3SNuD]

Indeed; I will take this into account in a later PR.
Thanks.

[gdkchan]

Apart from this single comment, lgtm. Once again, thanks for the excellent work fixing and optimizing those cpu instructions.