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Diffstat (limited to 'docs/TableGenFundamentals.html')
| -rw-r--r-- | docs/TableGenFundamentals.html | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/docs/TableGenFundamentals.html b/docs/TableGenFundamentals.html index 412dc74..2f0c4ae 100644 --- a/docs/TableGenFundamentals.html +++ b/docs/TableGenFundamentals.html @@ -423,7 +423,7 @@ class. This operation is analogous to $(foreach) in GNU make.</dd> 'c' otherwise.</dd> <dt><tt>!eq(a,b)</tt></dt> <dd>Integer one if string a is equal to string b, zero otherwise. This - only operates on string, int and bit objects. Use !cast<string> to + only operates on string, int and bit objects. Use !cast<string> to compare other types of objects.</dd> </dl> @@ -813,8 +813,7 @@ end-user to factor out commonality from the records.</p> apply, and one or more records to bind the values in. Here are some examples:</p> -<div class="doc_code"> -<pre> +<pre class="doc_code"> <b>let</b> isTerminator = 1, isReturn = 1, isBarrier = 1, hasCtrlDep = 1 <b>in</b> <b>def</b> RET : I<0xC3, RawFrm, (outs), (ins), "ret", [(X86retflag 0)]>; @@ -831,7 +830,6 @@ examples:</p> "call\t{*}$dst", []>; } </pre> -</div> <p>File-scope "let" expressions are often useful when a couple of definitions need to be added to several records, and the records do not otherwise need to be @@ -842,8 +840,7 @@ more ways to factor out commonality from the records, specially if using several levels of multiclass instanciations. This also avoids the need of using "let" expressions within subsequent records inside a multiclass.</p> -<div class="doc_code"> -<pre> +<pre class="doc_code"> <b>multiclass </b>basic_r<bits<4> opc> { <b>let </b>Predicates = [HasSSE2] in { <b>def </b>rr : Instruction<opc, "rr">; @@ -869,16 +866,17 @@ several levels of multiclass instanciations. This also avoids the need of using <div class="doc_section"><a name="codegen">Code Generator backend info</a></div> <!-- *********************************************************************** --> +<div class="doc_text"> + <p>Expressions used by code generator to describe instructions and isel patterns:</p> -<div class="doc_text"> - +<dl> <dt><tt>(implicit a)</tt></dt> <dd>an implicitly defined physical register. This tells the dag instruction selection emitter the input pattern's extra definitions matches implicit physical register definitions.</dd> - +</dl> </div> <!-- *********************************************************************** --> |