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| author | Clifford Wolf <clifford@clifford.at> | 2014-08-15 14:04:35 +0200 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2014-08-15 14:04:35 +0200 |
| commit | bf486002d9a6d976b3d086700ccdcfb0fb70ba0b (patch) | |
| tree | 0fc7c8e3d788cbbf625ccfbe90b74563aa9a77f1 | |
| parent | ca8711644975c128d45fd8e9434439c1266c00ac (diff) | |
| download | yosys-bf486002d9a6d976b3d086700ccdcfb0fb70ba0b.tar.gz yosys-bf486002d9a6d976b3d086700ccdcfb0fb70ba0b.tar.bz2 yosys-bf486002d9a6d976b3d086700ccdcfb0fb70ba0b.zip | |
Removed old doc references to $safe_pmux
| -rw-r--r-- | manual/CHAPTER_CellLib.tex | 4 | ||||
| -rw-r--r-- | manual/CHAPTER_Optimize.tex | 2 |
2 files changed, 1 insertions, 5 deletions
diff --git a/manual/CHAPTER_CellLib.tex b/manual/CHAPTER_CellLib.tex index f09c49298..f05c1b7ad 100644 --- a/manual/CHAPTER_CellLib.tex +++ b/manual/CHAPTER_CellLib.tex @@ -125,10 +125,6 @@ than one bit from \B{S} is set the output is undefined. Cells of this type are u ``parallel cases'' (defined by using the {\tt parallel\_case} attribute or detected by an optimization). -The {\tt \$safe\_pmux} behaves similarly to the {\tt \$pmux} cell type. But when more than one bit -of \B{S} is set, it is guaranteed that this cell type will output the value of the \B{A} input instead of -an undefined value. - Behavioural code with cascaded {\tt if-then-else}- and {\tt case}-statements usually results in trees of multiplexer cells. Many passes (from various optimizations to FSM extraction) heavily depend on these multiplexer trees to diff --git a/manual/CHAPTER_Optimize.tex b/manual/CHAPTER_Optimize.tex index c562650b8..af8e22497 100644 --- a/manual/CHAPTER_Optimize.tex +++ b/manual/CHAPTER_Optimize.tex @@ -136,7 +136,7 @@ This pass performs trivial resource sharing. This means that this pass identifie with identical inputs and replaces them with a single instance of the cell. The option {\tt -nomux} can be used to disable resource sharing for multiplexer -cells ({\tt \$mux}, {\tt \$pmux}, and {\tt \$safe\_pmux}). This can be useful as +cells ({\tt \$mux} and {\tt \$pmux}. This can be useful as it prevents multiplexer trees to be merged, which might prevent {\tt opt\_muxtree} to identify possible optimizations. |