diff options
Diffstat (limited to 'docs/TableGen/LangIntro.rst')
| -rw-r--r-- | docs/TableGen/LangIntro.rst | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/docs/TableGen/LangIntro.rst b/docs/TableGen/LangIntro.rst index 3e74dff..85c74a5 100644 --- a/docs/TableGen/LangIntro.rst +++ b/docs/TableGen/LangIntro.rst @@ -94,7 +94,9 @@ supported include: uninitialized field ``0b1001011`` - binary integer value + binary integer value. + Note that this is sized by the number of bits given and will not be + silently extended/truncated. ``07654321`` octal integer value (indicated by a leading 0) @@ -116,8 +118,9 @@ supported include: In rare cases, TableGen is unable to deduce the element type in which case the user must specify it explicitly. -``{ a, b, c }`` - initializer for a "bits<3>" value +``{ a, b, 0b10 }`` + initializer for a "bits<4>" value. + 1-bit from "a", 1-bit from "b", 2-bits from 0b10. ``value`` value reference @@ -208,6 +211,9 @@ supported include: on string, int and bit objects. Use !cast<string> to compare other types of objects. +``!shl(a,b)`` ``!srl(a,b)`` ``!sra(a,b)`` ``!add(a,b)`` ``!and(a,b)`` + The usual binary and arithmetic operators. + Note that all of the values have rules specifying how they convert to values for different types. These rules allow you to assign a value like "``7``" to a "``bits<4>``" value, for example. |