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-rw-r--r--Makefile2
-rw-r--r--README4
-rw-r--r--frontends/ast/dpicall.cc96
3 files changed, 93 insertions, 9 deletions
diff --git a/Makefile b/Makefile
index e7417539..8d7f2f8d 100644
--- a/Makefile
+++ b/Makefile
@@ -27,7 +27,7 @@ all: top-all
CXXFLAGS = -Wall -Wextra -ggdb -I"$(shell pwd)" -MD -DYOSYS_SRC='"$(shell pwd)"' -D_YOSYS_ -fPIC -I${DESTDIR}/include
LDFLAGS = -L${DESTDIR}/lib
-LDLIBS = -lstdc++ -lreadline -lm -ldl
+LDLIBS = -lstdc++ -lreadline -lm -lffi -ldl
QMAKE = qmake-qt4
SED = sed
diff --git a/README b/README
index a0e67e8a..5c3286c2 100644
--- a/README
+++ b/README
@@ -57,8 +57,8 @@ Icarus Verilog. For example on Ubuntu Linux 12.04 LTS the following commands
will install all prerequisites for building yosys:
$ yosys_deps="git g++ clang make bison flex libreadline-dev
- tcl8.5-dev zlib1g-dev libqt4-dev mercurial
- iverilog graphviz"
+ tcl8.5-dev zlib1g-dev libqt4-dev libffi-dev
+ mercurial iverilog graphviz"
$ sudo apt-get install $yosys_deps
There are also pre-compiled packages for Yosys on Ubuntu. Visit the Yosys
diff --git a/frontends/ast/dpicall.cc b/frontends/ast/dpicall.cc
index 965645cd..b79bd59e 100644
--- a/frontends/ast/dpicall.cc
+++ b/frontends/ast/dpicall.cc
@@ -17,26 +17,110 @@
*
*/
+#include <dlfcn.h>
+#include <ffi.h>
#include "ast.h"
+typedef void (*ffi_fptr) ();
+
+static ffi_fptr resolve_fn (std::string symbol_name)
+{
+ if (symbol_name.find(':') != std::string::npos)
+ {
+ int pos = symbol_name.find(':');
+ std::string plugin_name = symbol_name.substr(0, pos);
+ std::string real_symbol_name = symbol_name.substr(pos+1);
+
+ while (loaded_plugin_aliases.count(plugin_name))
+ plugin_name = loaded_plugin_aliases.at(plugin_name);
+
+ if (loaded_plugins.count(plugin_name) == 0)
+ log_error("unable to resolve '%s': can't find plugin `%s'\n", symbol_name.c_str(), plugin_name.c_str());
+
+ void *symbol = dlsym(loaded_plugins.at(plugin_name), real_symbol_name.c_str());
+
+ if (symbol == nullptr)
+ log_error("unable to resolve '%s': can't find symbol `%s' in plugin `%s'\n",
+ symbol_name.c_str(), real_symbol_name.c_str(), plugin_name.c_str());
+
+ return (ffi_fptr) symbol;
+ }
+
+ for (auto &it : loaded_plugins) {
+ void *symbol = dlsym(it.second, symbol_name.c_str());
+ if (symbol != nullptr)
+ return (ffi_fptr) symbol;
+ }
+
+ void *symbol = dlsym(RTLD_DEFAULT, symbol_name.c_str());
+ if (symbol != nullptr)
+ return (ffi_fptr) symbol;
+
+ log_error("unable to resolve '%s'.\n", symbol_name.c_str());
+}
+
AST::AstNode *AST::dpi_call(const std::string &rtype, const std::string &fname, const std::vector<std::string> &argtypes, const std::vector<AstNode*> &args)
{
AST::AstNode *newNode = nullptr;
+ union { double f64; float f32; int32_t i32; } value_store [args.size() + 1];
+ ffi_type *types [args.size() + 1];
+ void *values [args.size() + 1];
+ ffi_cif cif;
+ int status;
log("Calling DPI function `%s' and returning `%s':\n", fname.c_str(), rtype.c_str());
log_assert(SIZE(args) == SIZE(argtypes));
- for (int i = 0; i < SIZE(args); i++)
- if (argtypes[i] == "real" || argtypes[i] == "shortreal")
+ for (int i = 0; i < SIZE(args); i++) {
+ if (argtypes[i] == "real") {
+ log(" arg %d (%s): %f\n", i, argtypes[i].c_str(), args[i]->asReal(args[i]->is_signed));
+ value_store[i].f64 = args[i]->asReal(args[i]->is_signed);
+ values[i] = &value_store[i].f64;
+ types[i] = &ffi_type_double;
+ } else if (argtypes[i] == "shortreal") {
log(" arg %d (%s): %f\n", i, argtypes[i].c_str(), args[i]->asReal(args[i]->is_signed));
- else
+ value_store[i].f32 = args[i]->asReal(args[i]->is_signed);
+ values[i] = &value_store[i].f32;
+ types[i] = &ffi_type_double;
+ } else if (argtypes[i] == "integer") {
log(" arg %d (%s): %lld\n", i, argtypes[i].c_str(), (long long)args[i]->asInt(args[i]->is_signed));
+ value_store[i].i32 = args[i]->asInt(args[i]->is_signed);
+ values[i] = &value_store[i].i32;
+ types[i] = &ffi_type_sint32;
+ } else {
+ log_error("invalid argtype '%s' for argument %d.\n", argtypes[i].c_str(), i);
+ }
+ }
+
+ if (rtype == "integer") {
+ types[args.size()] = &ffi_type_slong;
+ values[args.size()] = &value_store[args.size()].i32;
+ } else if (rtype == "shortreal") {
+ types[args.size()] = &ffi_type_float;
+ values[args.size()] = &value_store[args.size()].f32;
+ } else if (rtype == "real") {
+ types[args.size()] = &ffi_type_double;
+ values[args.size()] = &value_store[args.size()].f64;
+ } else {
+ log_error("invalid rtype '%s'.\n", rtype.c_str());
+ }
+
+ if ((status = ffi_prep_cif(&cif, FFI_DEFAULT_ABI, args.size(), types[args.size()], types)) != FFI_OK)
+ log_error("ffi_prep_cif failed: status %d.\n", status);
- if (rtype == "real" || rtype == "shortreal") {
+ ffi_call(&cif, resolve_fn(fname.c_str()), values[args.size()], values);
+
+ if (rtype == "real") {
+ newNode = new AstNode(AST_REALVALUE);
+ newNode->realvalue = value_store[args.size()].f64;
+ log(" return realvalue: %g\n", newNode->asReal(true));
+ } else if (rtype == "shortreal") {
newNode = new AstNode(AST_REALVALUE);
- newNode->realvalue = 1234;
+ newNode->realvalue = value_store[args.size()].f32;
+ log(" return realvalue: %g\n", newNode->asReal(true));
} else {
- newNode = AstNode::mkconst_int(1234, false);
+ newNode = AstNode::mkconst_int(value_store[args.size()].i32, false);
+ log(" return integer: %lld\n", (long long)newNode->asInt(true));
}
return newNode;