From 003f93f13464b6ec80b89840bbc07102011fa5b4 Mon Sep 17 00:00:00 2001
From: Tim Northover <tnorthover@apple.com>
Date: Wed, 14 Aug 2013 15:27:20 +0000
Subject: Add the C99 hex-float assembly syntax to our extension document.

As Ben pointed out, GAS doesn't support this syntax so we should give at least
some warning that it might not be portable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188377 91177308-0d34-0410-b5e6-96231b3b80d8
---
 docs/Extensions.rst | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/docs/Extensions.rst b/docs/Extensions.rst
index 78ff874abf..52dadc74e3 100644
--- a/docs/Extensions.rst
+++ b/docs/Extensions.rst
@@ -14,6 +14,19 @@ Introduction
 This document describes extensions to tools and formats LLVM seeks compatibility
 with.
 
+General Assembly Syntax
+===========================
+
+C99-style Hexadecimal Floating-point Constants
+----------------------------------------------
+
+LLVM's assemblers allow floating-point constants to be written in C99's
+hexadecimal format instead of decimal if desired.
+
+.. code-block:: gas
+  .section .data
+  .float 0x1c2.2ap3
+
 Machine-specific Assembly Syntax
 ================================
 
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