From ba83a7bdc641c68344b41f407323c76b8c62c674 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Fri, 22 Aug 2014 14:37:14 +0200 Subject: [PATCH] Added DPI-C documentation to README file --- README | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/README b/README index 5c3286c20..2e713ffef 100644 --- a/README +++ b/README @@ -317,6 +317,18 @@ Verilog Attributes and non-standard features ... endmodule +- A limited subset of DPI-C functions is supported. The plugin mechanism + (see "help plugin") can be used load .so files with implementations of + DPI-C routines. As a non-standard extension it is possible to specify + a plugin alias using the ":" syntax. for example: + + module dpitest; + import "DPI-C" function foo:round = real my_round (real); + parameter real r = my_round(12.345); + endmodule + + $ yosys -p 'plugin -a foo -i /lib/libm.so; read_verilog dpitest.v' + - Sized constants (the syntax 's?[bodh]) support constant expressions as . If the expresion is not a simple identifier, it must be put in parentheses. Examples: WIDTH'd42, (4+2)'b101010 -- 2.30.2