rust-asm: rust -> assembly interop demo

1 files changed, 36 insertions, 0 deletions

diff --git a/rust-asm/src/main_aarch64.S b/rust-asm/src/main_aarch64.S
new file mode 100644
index 0000000..424a72f
--- /dev/null
+++ b/rust-asm/src/main_aarch64.S
@@ -0,0 +1,36 @@
+// ================================================================================================
+// Rust->assembly interop demo
+//
+// License:
+//     SPDX-License-Identifier: 0BSD
+//     Copyright (c) 2026 Hunter Kvalevog
+//
+//     Permission to use, copy, modify, and/or distribute this software for any
+//     purpose with or without fee is hereby granted.
+//
+//     THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+//     WITH REGARD TO THIS SOFTWARE.
+// ================================================================================================
+
+#include "../../_common/aarch64/common.S"
+
+TEXT_SEGMENT
+
+.global SYM(add_u32)
+.global SYM(dot_f32v3)
+
+SYM(add_u32):
+    add w0, w0, w1
+    ret
+
+SYM(dot_f32v3):
+    ldp s1, s2, [x0]            // a.x, a.y
+    ldp s3, s4, [x1]            // b.x, b.y
+    ldr s5, [x0, #8]            // a.z
+    ldr s6, [x1, #8]            // b.z
+
+    fmul  s0, s1, s3            // a.x * b.x
+    fmadd s0, s2, s4, s0        // + a.y * b.y
+    fmadd s0, s5, s6, s0        // + a.z * b.z
+    
+    ret