Add amdgpu intrinsics

Add intrinsics for the amdgpu architecture.

Author: Flakebi

.github/workflows/main.yml

@@ -84,6 +84,8 @@ jobs:
           os: ubuntu-latest
         - tuple: nvptx64-nvidia-cuda
           os: ubuntu-latest
+        - tuple: amdgcn-amd-amdhsa
+          os: ubuntu-latest
         - tuple: thumbv6m-none-eabi
           os: ubuntu-latest
         - tuple: thumbv7m-none-eabi
@@ -201,6 +203,10 @@ jobs:
             tuple: aarch64-apple-ios-macabi
             os: macos-15
           norun: true # https://github.com/rust-lang/stdarch/issues/1206
+        - target:
+            tuple: amdgcn-amd-amdhsa
+            os: ubuntu-latest
+          norun: true
 
     steps:
     - uses: actions/checkout@v4
@@ -212,12 +218,17 @@ jobs:
 
     - run: rustup target add ${{ matrix.target.tuple }}
       shell: bash
-      if: matrix.build_std == ''
+      if: matrix.build_std == '' && matrix.target.tuple != 'amdgcn-amd-amdhsa'
     - run: |
         rustup component add rust-src
         echo "CARGO_UNSTABLE_BUILD_STD=std" >> $GITHUB_ENV
       shell: bash
       if: matrix.build_std != ''
+    - run: |
+        rustup component add rust-src
+        echo "CARGO_UNSTABLE_BUILD_STD=core,alloc" >> $GITHUB_ENV
+      shell: bash
+      if: matrix.target.tuple == 'amdgcn-amd-amdhsa'
 
     # Configure some env vars based on matrix configuration
     - run: echo "PROFILE=--profile=${{matrix.profile}}" >> $GITHUB_ENV
@@ -233,7 +244,7 @@ jobs:
       if: matrix.disable_assert_instr != ''
     - run: echo "NOSTD=1" >> $GITHUB_ENV
       shell: bash
-      if: startsWith(matrix.target.tuple, 'thumb') || matrix.target.tuple == 'nvptx64-nvidia-cuda'
+      if: startsWith(matrix.target.tuple, 'thumb') || matrix.target.tuple == 'nvptx64-nvidia-cuda' || matrix.target.tuple == 'amdgcn-amd-amdhsa'
 
     # Windows & OSX go straight to `run.sh` ...
     - run: ./ci/run.sh

ci/docker/amdgcn-amd-amdhsa/Dockerfile

@@ -0,0 +1,5 @@
+FROM ubuntu:25.10
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  gcc \
+  libc6-dev \
+  ca-certificates

ci/dox.sh

@@ -15,6 +15,11 @@ dox() {
 
   cargo clean --target "${1}"
 
+  if [ "${1}" == "amdgcn-amd-amdhsa" ]; then
+    export CARGO_UNSTABLE_BUILD_STD=core,alloc
+    export RUSTFLAGS="${RUSTFLAGS} -Ctarget-cpu=gfx900"
+  fi
+
   cargo build --verbose --target "${1}" --manifest-path crates/core_arch/Cargo.toml
   cargo doc --verbose --target "${1}" --manifest-path crates/core_arch/Cargo.toml
 }
@@ -33,6 +38,7 @@ if [ -z "$1" ]; then
   #dox mips64-unknown-linux-gnuabi64
   dox wasm32-unknown-unknown
   dox nvptx64-nvidia-cuda
+  dox amdgcn-amd-amdhsa
 else
   dox "${1}"
 fi

ci/run.sh

@@ -42,6 +42,9 @@ case ${TARGET} in
     armv7-*eabihf | thumbv7-*eabihf)
         export RUSTFLAGS="${RUSTFLAGS} -Ctarget-feature=+neon"
         ;;
+    amdgcn-*)
+        export RUSTFLAGS="${RUSTFLAGS} -Ctarget-cpu=gfx900"
+        ;;
     # Some of our test dependencies use the deprecated `gcc` crates which
     # doesn't detect RISC-V compilers automatically, so do it manually here.
     riscv*)