Added documentation to IceStorm module.

docs/markdown/Icestorm-module.md

@@ -0,0 +1,27 @@
+# Unstable SIMD module
+
+This module provides is available since version 0.45.0.
+
+**Note**: this module is unstable. It is only provided as a technology
+preview.  Its API may change in arbitrary ways between releases or it
+might be removed from Meson altogether.
+
+## Usage
+
+This module provides an experimental to create FPGA bitstreams using
+the [IceStorm](http://www.clifford.at/icestorm/) suite of tools.
+
+The module exposes only one method called `project` and it is used
+like this:
+
+    is.project('projname',
+      <verilog files>,
+      constraint_file : <pcf file>,
+    )
+
+The input to this function is the set of Verilog files and a
+constraint file. This produces output files called `projname.asc`,
+`projname.blif` and `projname.bin`. In addition it creates two run
+targets called `projname-time` for running timing analysis and
+`projname-upload` that uploads the generated bitstream to an FPGA
+devide using the `iceprog` programming executable.

docs/markdown/snippets/fpga.md

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+## Experimental FPGA support
+
+This version adds support for generating, analysing and uploading FPGA
+programs using the [IceStorm
+toolchain](http://www.clifford.at/icestorm/). This support is
+experimental and is currently limited to the `iCE 40` series of FPGA
+chips.
+
+FPGA generation integrates with other parts of Meson seamlessly. As an
+example, [here](https://github.com/jpakkane/lm32) is an example
+project that compiles a simple firmware into Verilog and combines that
+with an lm32 softcore processor.

docs/sitemap.txt

@@ -30,6 +30,7 @@ index.md
 		Modules.md
 			Gnome-module.md
 			i18n-module.md
+			Icestorm-module.md
 			Pkgconfig-module.md
 			Python-3-module.md
 			Qt4-module.md