Remove feature flags and add rv64

Author: diondokter

.github/workflows/ci.yml

@@ -27,8 +27,8 @@ jobs:
         cargo install cargo-binutils
         rustup component add llvm-tools-preview
     - name: Check
-      run: cargo check --features cortex-m --target thumbv7em-none-eabi
+      run: cargo check --target thumbv7em-none-eabi
     - name: Clippy
-      run: cargo clippy --features cortex-m --target thumbv7em-none-eabi
+      run: cargo clippy --target thumbv7em-none-eabi
     - name: Format
       run: cargo fmt

Cargo.toml

@@ -15,5 +15,3 @@ default = ["erase-chip", "panic-handler"]
 erase-chip = []
 panic-handler = []
 verify = []
-cortex-m = []
-risc-v = []

src/lib.rs

@@ -21,7 +21,7 @@ fn panic(_info: &core::panic::PanicInfo) -> ! {
     unsafe {
         #[cfg(target_arch = "arm")]
         core::arch::asm!("udf #0");
-        #[cfg(target_arch = "riscv32")]
+        #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
         core::arch::asm!("UNIMP");
         core::hint::unreachable_unchecked();
     }