chore:Used NEON BLAKE3 on ARM, kept the x86 build on pure-Rust

Author: abhiprd2000

Cargo.toml

@@ -26,7 +26,7 @@ test = false
 bench = false
 
 [dependencies]
-blake3 = { version = "1.8.3", default-features = false, features = ["pure"] }
+blake3 = { version = "1.8.3", default-features = false }
 spin = "0.5.2"
 linked_list_allocator = "0.9.0"
 
@@ -49,13 +49,19 @@ version = "0.2"
 default-features = false
 
 [target.'cfg(target_arch = "x86_64")'.dependencies]
+# x86 kernel is soft-float / no-SSE, so BLAKE3 stays pure-Rust here.
+blake3 = { version = "1.8.3", default-features = false, features = ["pure"] }
 bootloader = { version = "0.9", features = ["map_physical_memory"] }
 volatile = "0.2.6"
 x86_64 = "0.14.2"
 uart_16550 = "0.2.0"
 pic8259 = "0.10.1"
 pc-keyboard = "0.7.0"
 
+[target.'cfg(target_arch = "aarch64")'.dependencies]
+# ARM boot already enables FP/SIMD at EL1 (CPACR_EL1), so NEON is usable.
+blake3 = { version = "1.8.3", default-features = false, features = ["neon"] }
+
 [package.metadata.bootimage]
 test-args = [
     "-device",
@@ -68,4 +74,4 @@ test-args = [
 test-success-exit-code = 33
 
 [build-dependencies]
-ar = "0.9"
+ar = "0.9"