[llvm] r301920 - Improvements to TableGen/LangIntro.rst
Alex Bradbury via llvm-commits
llvm-commits at lists.llvm.org
Tue May 2 06:47:10 PDT 2017
Author: asb
Date: Tue May 2 08:47:10 2017
New Revision: 301920
URL: http://llvm.org/viewvc/llvm-project?rev=301920&view=rev
Log:
Improvements to TableGen/LangIntro.rst
Document the 'code' data type, and that value{15-17} is different to
value{17-15}.
Patch by @chenwj (Wei-Ren Chen).
Differential Revision: https://reviews.llvm.org/D32117
Modified:
llvm/trunk/docs/TableGen/LangIntro.rst
Modified: llvm/trunk/docs/TableGen/LangIntro.rst
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/TableGen/LangIntro.rst?rev=301920&r1=301919&r2=301920&view=diff
==============================================================================
--- llvm/trunk/docs/TableGen/LangIntro.rst (original)
+++ llvm/trunk/docs/TableGen/LangIntro.rst Tue May 2 08:47:10 2017
@@ -58,6 +58,10 @@ types are:
The 'string' type represents an ordered sequence of characters of arbitrary
length.
+``code``
+ The `code` type represents a code fragment, which can be single/multi-line
+ string literal.
+
``bits<n>``
A 'bits' type is an arbitrary, but fixed, size integer that is broken up
into individual bits. This type is useful because it can handle some bits
@@ -105,7 +109,7 @@ supported include:
hexadecimal integer value
``"foo"``
- string value
+ a single-line string value, can be assigned to ``string`` or ``code`` variable.
``[{ ... }]``
usually called a "code fragment", but is just a multiline string literal
@@ -126,7 +130,8 @@ supported include:
access to one bit of a value
``value{15-17}``
- access to multiple bits of a value
+ access to an ordered sequence of bits of a value, in particular ``value{15-17}``
+ produces an order that is the reverse of ``value{17-15}``.
``DEF``
reference to a record definition
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