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[mono][amd64] Pass and return SIMD values in SIMD registers. #93182

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wants to merge 6 commits into from
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[mono][amd64] Pass and return SIMD values in SIMD registers. #93182

wants to merge 6 commits into from

Commits on Nov 6, 2023

  1. [mono][amd64] Pass SIMD arguments in SIMD registers.

    @vargaz
    vargaz committed Nov 6, 2023
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  2. Pass simd arguments using a different xmove_arg opcode. 

    XMOVE can be optimized away which creates problems if the argument is on the stack, since
mono_spill_global_vars () doesn't process call arguments, it only processes the move
instructions before it. If a normal argument is on the stack, it means its volatile/indirect,
so its move is not optimized away, but for simd args, they can become indirect when
the xcall opcode is decomposed which can happen after the xmove was optimized away, so
we end up with code like:

```
ldaddr R19 <- R20
 vcall2
voidcall [..] [s:xmm0 <- R20]
```
    @vargaz
    vargaz committed Nov 6, 2023
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  3. More fixes.

    @vargaz
    vargaz committed Nov 6, 2023
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  4. Return SIMD values in registers as well.

    @vargaz
    vargaz committed Nov 6, 2023
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  5. Implement dyncall support.

    @vargaz
    vargaz committed Nov 6, 2023
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  6. Implement gsharedvt-in support.

    @vargaz
    vargaz committed Nov 6, 2023
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