Update README

Author: imphil

README.md

@@ -1,30 +1,45 @@
 lowRISC toolchain builds
 ========================
 
-This repository contains tools to create toolchains for lowRISC internal use.
-The toolchains are *not supported* by lowRISC or recommended to be used outside of lowRISC.
+This repository contains tools to create toolchains for lowRISC internal
+use. The toolchains are *not supported* by lowRISC or recommended to be
+used outside of lowRISC.
 
-Head over to the GitHub releases for this repository for pre-built toolchains.
+Head over to the
+[GitHub releases for this repository](https://github.com/lowRISC/lowrisc-toolchains/releases)
+for pre-built toolchains.
+
+* A GCC RV32IMC without hardfloat support, targeting [Ibex](https://github.com/lowRISC/ibex/)
+* A GCC multilib toolchain
 
 How to do a release
 -------------------
 
 1. Modify `RISCV_GNU_TOOLCHAIN_COMMIT_ID` in `azure-pipelines.yml` and
    other build scripts and flags as needed.
 
-2. Tag a release
+2. Push the changes or do a pull request, and wait for the pipeline to
+   complete.
+
+   The build can be tested by downloading the Azure Pipeline artifacts.
+     1. Go to the [lowrisc-toolchains Azure Pipelines page](https://dev.azure.com/lowrisc/lowrisc-toolchains/_build?definitionId=2&_a=summary)
+     2. Select a build
+     3. Click on "Artifacts" (top right)
+     4. Download the desired artifact, and test it.
+
+3. Tag a release
 
-  ```bash
-  VERSION=$(date +%Y%m%d)-1
-  git tag -a -m "Release version $VERSION" $VERSION
-  ```
+   ```bash
+   VERSION=$(date +%Y%m%d)-1
+   git tag -a -m "Release version $VERSION" $VERSION
+   ```
 
-3. Push the tag
+4. Push the tag
 
-  ```bash
-  git push origin $VERSION
-  ```
+   ```bash
+   git push origin $VERSION
+   ```
 
-Now the release builds on Azure Pipelines, and the resulting binaries
-will be uploaded to
-[GitHub releases](https://github.com/lowRISC/lowrisc-toolchains/releases).
+   Now the release builds on Azure Pipelines, and the resulting binaries
+   will be uploaded to
+   [GitHub releases](https://github.com/lowRISC/lowrisc-toolchains/releases).