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Fix illumos compile error in coreclr/runtime/amd64/AllocFast.S #117463

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Jul 13, 2025
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Fix illumos compile error in coreclr/runtime/amd64/AllocFast.S #117463

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5 changes: 4 additions & 1 deletion src/coreclr/runtime/amd64/AllocFast.S
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Original file line number Diff line number Diff line change
Expand Up @@ -233,8 +233,11 @@ LEAF_END RhpNewArrayFast, _TEXT
LEAF_ENTRY RhpNewPtrArrayFast, _TEXT

// Delegate overflow handling to the generic helper conservatively
// The constant 0x8000000 is (0x40000000 / sizeof(void*))
// Some assemblers don't like an expression here, so the
// constant expression is reduced to it's simple form.

cmp rsi, (0x40000000 / 8) // sizeof(void*)
cmp rsi, 0x8000000 // (0x40000000 / 8)
jae C_FUNC(RhpNewArrayFast)

// In this case we know the element size is sizeof(void *), or 8 for x64
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