The powers that be have decided that LLVM IR should now support 16-bit
"half precision" floating-point with a first-class type.
This patch adds basic IR support (but not codegen support).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146786 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 90308a4..58ebbc3 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -1709,7 +1709,7 @@
</tr>
<tr>
<td><a href="#t_floating">floating point</a></td>
- <td><tt>float, double, x86_fp80, fp128, ppc_fp128</tt></td>
+ <td><tt>half, float, double, x86_fp80, fp128, ppc_fp128</tt></td>
</tr>
<tr>
<td><a name="t_firstclass">first class</a></td>
@@ -1809,6 +1809,7 @@
<table>
<tbody>
<tr><th>Type</th><th>Description</th></tr>
+ <tr><td><tt>half</tt></td><td>16-bit floating point value</td></tr>
<tr><td><tt>float</tt></td><td>32-bit floating point value</td></tr>
<tr><td><tt>double</tt></td><td>64-bit floating point value</td></tr>
<tr><td><tt>fp128</tt></td><td>128-bit floating point value (112-bit mantissa)</td></tr>
@@ -2268,10 +2269,11 @@
represented in their IEEE hexadecimal format so that assembly and disassembly
do not cause any bits to change in the constants.</p>
-<p>When using the hexadecimal form, constants of types float and double are
+<p>When using the hexadecimal form, constants of types half, float, and double are
represented using the 16-digit form shown above (which matches the IEEE754
- representation for double); float values must, however, be exactly
- representable as IEE754 single precision. Hexadecimal format is always used
+ representation for double); half and float values must, however, be exactly
+ representable as IEE754 half and single precision, respectively.
+ Hexadecimal format is always used
for long double, and there are three forms of long double. The 80-bit format
used by x86 is represented as <tt>0xK</tt> followed by 20 hexadecimal digits.
The 128-bit format used by PowerPC (two adjacent doubles) is represented