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spike(TEMP): aarch64 .S on macos-15 — R2 de-risk for full-platform #85

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spike(TEMP): aarch64 .S on macos-15 — R2 de-risk for full-platform #85

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1 change: 1 addition & 0 deletions mcpp.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
members = [
"tests/examples/archive",
"tests/examples/asio",
"tests/examples/asm-macos-spike",
"tests/examples/asio-module",
"tests/examples/build-mcpp",
"tests/examples/cjson",
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9 changes: 9 additions & 0 deletions tests/examples/asm-macos-spike/asm/add_arm64.S
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// R2 spike: minimal aarch64 GAS .S — proves mcpp assembles + links a GAS .S TU
// on macos-15 (the #1 macOS unknown; FFmpeg/OpenCV SIMD on arm64 is GAS .S).
// macOS arm64 ABI: w0=arg0, w1=arg1, result in w0; C symbol `asm_add` -> `_asm_add`.
.text
.p2align 2
.globl _asm_add
_asm_add:
add w0, w0, w1
ret
9 changes: 9 additions & 0 deletions tests/examples/asm-macos-spike/mcpp.toml
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# R2 spike (TEMP — remove after the macOS .S path is proven): compile one
# aarch64 GAS .S unit on macos-15 and link it into a test. cfg(macos)-gated so
# the aarch64 asm is only assembled on macOS; a no-op main elsewhere.
[package]
name = "asm-macos-spike-tests"
version = "0.1.0"

[target.'cfg(macos)'.build]
sources = ["asm/add_arm64.S"]
11 changes: 11 additions & 0 deletions tests/examples/asm-macos-spike/tests/spike.cpp
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#ifdef __APPLE__
import std;
extern "C" int asm_add(int, int); // defined in asm/add_arm64.S
int main() {
int r = asm_add(2, 3);
std::println("asm-macos-spike: aarch64 .S linked OK, asm_add(2,3)={}", r);
return r == 5 ? 0 : 1;
}
#else
int main() { return 0; }
#endif
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