rv32imc with experimental B v0.92 extension (rv32imcb)

Signed-off-by: Sam Elliott <[email protected]>

Author: lenary

azure-pipelines.yml

@@ -49,6 +49,41 @@ jobs:
     parameters:
       azure_name: rv32imc-toolchains
 
+- job: "Toolchains_RV32IMCB"
+  displayName: "GCC and Clang/LLVM toolchains targeting RV32IMC+B (Ibex with Bit Manipulation)"
+  pool:
+    vmImage: "ubuntu-16.04"
+  timeoutInMinutes: 360
+  steps:
+  - template: "_build-deps.yml"
+
+  - bash: |
+      ./build-gcc-with-args.sh \
+        "lowrisc-toolchain-gcc-rv32imcb" \
+        "riscv32-unknown-elf" \
+        "/tools/riscv" \
+        "-march=rv32imcb" "-mabi=ilp32" "-mcmodel=medany"
+    displayName: 'Build GCC toolchain'
+    env:
+      ARTIFACT_STAGING_DIR: $(Build.ArtifactStagingDirectory)
+      RELEASE_TAG: $(ReleaseTag)
+
+  - bash: |
+      ./build-clang-with-args.sh \
+        "lowrisc-toolchain-rv32imcb" \
+        "riscv32-unknown-elf" \
+        "/tools/riscv" \
+        "-march=rv32imcb0p92" "-mabi=ilp32" "-mcmodel=medany" \
+        "-menable-experimental-extensions"
+    displayName: "Build Clang toolchain"
+    env:
+      ARTIFACT_STAGING_DIR: $(Build.ArtifactStagingDirectory)
+      RELEASE_TAG: $(ReleaseTag)
+
+  - template: "_upload-artifacts.yml"
+    parameters:
+      azure_name: rv32imcb-toolchains
+
 - job: "GCC_Multilib_Baremetal"
   displayName: "RV64 GCC (Multilib Baremetal)"
   condition: false

build-gcc-with-args.sh

@@ -52,12 +52,13 @@ mkdir -p "${toolchain_dest}"
 mkdir -p "${build_top_dir}/build/gcc"
 cd "${build_top_dir}/build/gcc"
 
-# Create crosstool-ng config file with correct `CT_PREFIX_DIR`
+# Create crosstool-ng config file with correct `CT_PREFIX_DIR` and `CT_LOCAL_PATCH_DIR`
 {
   cat "${build_top_dir}/${toolchain_name}.config";
   echo "";
   echo "# ADDED BY ${0}";
   echo "CT_PREFIX_DIR=\"${toolchain_dest}\"";
+  echo "CT_LOCAL_PATCH_DIR=\"${build_top_dir}/patches/${toolchain_name}\"";
   echo "# END ADDED BY ${0}";
 } >> .config
 ct-ng upgradeconfig

lowrisc-toolchain-gcc-rv32imcb.config

@@ -0,0 +1,59 @@
+CT_CONFIG_VERSION="3"
+CT_EXPERIMENTAL=y
+
+CT_ARCH_RISCV=y
+
+# CT_ARCH_ARCH controls the specific architecture that the toolchain's libraries
+# are built with. It should specify the minimum RISC-V extensions that need to
+# be implemented by any processor that this toolchain will compile programs for.
+#
+# 2020-03-26: We have added B extension (v0.92) support to the compiler using
+#             experimental patches, but we still want to support Ibex without
+#             the B extension, so this remains "rv32imc".
+#
+CT_ARCH_ARCH="rv32imc"
+
+# CT_ARCH_ABI controls the specific ABI that the toolchain's libraries are built
+# with. All programs built against this toolchain should follow exactly this
+# ABI.
+CT_ARCH_ABI="ilp32"
+
+CT_TARGET_VENDOR=""
+# CT_CC_GCC_LDBL_128 is not set
+CT_CC_LANG_CXX=y
+CT_DEBUG_GDB=y
+CT_GDB_V_8_2=y
+# CT_GDB_CROSS_PYTHON is not set
+CT_ISL_V_0_20=y
+CT_PATCH_ORDER="bundled,local"
+CT_PATCH_BUNDLED_LOCAL=y
+CT_PATCH_USE_LOCAL=y
+
+# Disable progress bar for CI builds, it generates too much log output
+# CT_LOG_PROGRESS_BAR is not set
+
+# Installation prefix directory; the toolchain will end up in exactly
+# this directory.
+CT_PREFIX_DIR="/tools/riscv"
+
+# Don't save tarballs for re-use (needs writable and pre-created
+# CT_LOCAL_TARBALLS_DIR otherwise)
+# CT_SAVE_TARBALLS is not set
+
+# Don't chmod the CT_PREFIX_DIR read-only after the install.
+# CT_PREFIX_DIR_RO is not set
+
+# We apply the binutils bitmanip patches on top of git commit 612aac65
+CT_BINUTILS_SRC_DEVEL=y
+CT_BINUTILS_DEVEL_VCS_git=y
+CT_BINUTILS_DEVEL_URL="https://github.com/bminor/binutils-gdb.git"
+CT_BINUTILS_DEVEL_REVISION="612aac65e690387c963c34a31dd1fb138d88a45c"
+
+# We apply the gcc bitmanip patches on top of git commit 49f75e008c0
+CT_GCC_SRC_DEVEL=y
+CT_GCC_DEVEL_VCS_git=y
+CT_GCC_DEVEL_URL="https://github.com/riscv/riscv-gcc.git"
+CT_GCC_DEVEL_REVISION="49f75e008c0809eb3c74a163297b4aa8925c9f1c"
+
+# The build script appends a definition of CT_LOCAL_PATCH_DIR down here, that
+# points to the repo's patch directory.