Hojun-Cho
83f5956df2
Every section banner dies (103 -> 0) across test/lang, the observer suites, the C carriers, and the five comment-heavy corpus fixtures; banner provenance (#N cites, carrier numbers, repair-cluster labels) folded into headers or adjacent WHY comments. Narration deleted; row provenance, ref cites, divergence pins, and layout contracts kept (fwd-ref decl-order guards and bootstrap-gate corpus rationale restored where the sweep over-cut). Comment-only proven: all 3742 wwbuild workdir .s byte-identical before/after; test-commit and test-byteid (161 lang + 1399 data, 0 pinned-divergent) green.
85 lines
3.5 KiB
Plaintext
85 lines
3.5 KiB
Plaintext
// Runtime contract for #163, the tuple-PARAM ABI (the param
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// twin of #164's tuple RETURN). Migrated from test/wcc/905_tupparam_run.c.
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// A tuple passed AS AN ARGUMENT was unhandled in both stages: a tuple-typed
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// call result left its elements in the return-ABI cursor and the SEND fell to
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// the 1-GP-word else, so all but the first element was dropped. The fix
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// restages the tuple into a frame slot by SysV class then pushes the slot
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// words; both stages byte-identical (rule 10). GATE-BLIND TO BYTE-ID ALONE:
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// pre-fix both stages were symmetric-WRONG, so cs==ww held — the rows diverge
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// only at RUNTIME; these @test fns pin that runtime contract (T1), the byte-id
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// gate (T2) keeps cs==ww. The loud-stop arg-reg-overflow row is a reject
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// carrier (test/wcc/data/tupparam_gp_overflow_loudstop/).
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package tupparam_test;
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fn pair_f64f64_arg(a: f64, b: f64) (f64, f64) = { return (a, b); };
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fn add_f64f64_arg(t: (f64, f64)) f64 = { return t.0 + t.1; };
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fn pair_i64i64_arg(a: i64, b: i64) (i64, i64) = { return (a, b); };
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fn add_i64i64_arg(t: (i64, i64)) i64 = { return t.0 + t.1; };
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fn mk_f64i64_arg(a: f64, b: i64) (f64, i64) = { return (a, b); };
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fn add_f64i64_arg(t: (f64, i64)) i64 = { return (t.0: i64) + t.1; };
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fn mk_i64f64_arg(a: i64, b: f64) (i64, f64) = { return (a, b); };
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fn add_i64f64_arg(t: (i64, f64)) i64 = { return t.0 + (t.1: i64); };
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fn mk_f64str_arg(a: f64) (f64, str) = { return (a, "hello"); };
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fn add_f64str_arg(t: (f64, str)) i64 = {
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return (t.0: i64) + (t.1.len: i64);
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};
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fn pair_two_tuple_args(a: i64, b: i64) (i64, i64) = { return (a, b); };
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fn add4_two_tuple_args(s: (i64, i64), t: (i64, i64)) i64 = {
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return s.0 + s.1 + t.0 + t.1;
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};
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fn pair_f64f64_chain(a: f64, b: f64) (f64, f64) = { return (a, b); };
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fn id_f64f64_chain(t: (f64, f64)) f64 = { return t.0 * 10.0 + t.1; };
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// HEADLINE — (f64, f64) arg. Pre-fix the SEND pushes only AX (the two floats
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// stay stranded in X0/X1) and the callee reads one GP word. Post-fix each
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// float rides the SSE arg cursor (X0, X1).
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@test fn f64f64_arg() void = {
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assert(!(add_f64f64_arg(pair_f64f64_arg(3.0, 5.0)) != 8.0));
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};
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// (i64, i64) arg — proves the broader INTEGER-tuple-param drop is fixed
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// (master dropped the second i64 too). e0->DI, e1->SI.
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@test fn i64i64_arg() void = {
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assert(!(add_i64i64_arg(pair_i64i64_arg(3, 5)) != 8));
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};
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// (f64, i64) — class independent of position: f64@X0 (SSE cursor), i64@DI
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// (INTEGER cursor), independent counters.
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@test fn f64i64_arg() void = {
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assert(!(add_f64i64_arg(mk_f64i64_arg(3.0, 5)) != 8));
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};
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// (i64, f64) — order-swap: i64@DI, f64@X0. Confirms the float lands in the
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// next XMM regardless of its positional slot.
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@test fn i64f64_arg() void = {
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assert(!(add_i64f64_arg(mk_i64f64_arg(3, 5.0)) != 8));
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};
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// (f64, str) — SSE + wide (24B {ptr,len,cap}) coexist. The f64 rides X0 (SSE,
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// consuming no GP slot); the str rides DI/SI/DX (INTEGER cursor). f=4.0,
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// s.len=5 -> 4+5 = 9.
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@test fn f64str_arg() void = {
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assert(!(add_f64str_arg(mk_f64str_arg(4.0)) != 9));
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};
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// MULTI-TUPLE-ARG, ONE CALL — f(g(), h()) where both args are tuple-producing
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// calls. Proves @tupargscr (single-slot-per-fn) is REUSED per arg, not
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// COLLIDED. 1+2+3+4 = 10.
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@test fn two_tuple_args() void = {
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assert(!(add4_two_tuple_args(pair_two_tuple_args(1, 2),
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pair_two_tuple_args(3, 4)) != 10));
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};
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// CONTROL — a tuple arg threaded through a chain of two calls, proving the
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// SEND/RECV round-trips through the slot intact.
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@test fn f64f64_chain() void = {
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assert(!(id_f64f64_chain(pair_f64f64_chain(3.0, 5.0)) != 35.0));
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};
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