736382d39c
91/91 regression tests pass (+ffi-04-fp-struct). Single-file regression net for the all-float / all-double aggregate ABI path: FQuad — 16 B, 4×f32 (same slot as ffi-02's Vec4f) DQuad — 32 B, 4×f64 (UIEdgeInsets-shape — the f32-vs-f64 landmine) Already nominally covered by ffi-02's Vec4f, but pinning it as a focused single-file test means a future ABI rule change that breaks the HFA path fails *this* test directly without a noisy drag-in from the multi-shape baseline. DQuad at 32 B straddles the AAPCS64 HFA limit (≤4 floats of same type, total ≤64 B); it stays as a struct value passed through v0..v3 rather than going indirect. The snapshot confirms the values arrive intact.
21 lines
993 B
C
21 lines
993 B
C
// Focused FP-aggregate (HFA) FFI baselines. Distinct from the int-aggregate
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// register-coercion paths because all-float / all-double structs of ≤4 fields
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// stay as struct values in LLVM and are passed/returned via the float
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// register file (AAPCS64 v0..v3; SysV AMD64 xmm0..xmm7). This was the
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// `UIEdgeInsets`-as-f32-vs-f64 landmine — pinned here so a future ABI rule
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// change that wrecks the FP path fails this test directly.
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//
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// FQuad — 16 B, four float (small HFA; same slot as Vec4f)
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// DQuad — 32 B, four double (UIEdgeInsets-shape HFA)
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typedef struct { float a; float b; float c; float d; } FQuad;
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typedef struct { double a; double b; double c; double d; } DQuad;
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FQuad ffi_fquad_make (float a, float b, float c, float d);
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FQuad ffi_fquad_reverse(FQuad v);
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float ffi_fquad_sum (FQuad v);
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DQuad ffi_dquad_make (double a, double b, double c, double d);
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DQuad ffi_dquad_reverse(DQuad v);
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double ffi_dquad_sum (DQuad v);
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