[difftest] move svdpi bindings to separate repo

difftest/Cargo.toml

@@ -23,3 +23,4 @@ tracing-subscriber = { version = "0.3", features = ["env-filter", "ansi"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 num-bigint = "0.4.6"
+svdpi = "0.0.1"

difftest/online_dpi/Cargo.toml

@@ -10,9 +10,8 @@ common = { path = "../test_common" }
 spike_rs = { path = "../spike_rs" }
 clap = { workspace = true }
 tracing = { workspace = true }
+svdpi = { workspace = true }
 hex = "0.4.3"
 
 [features]
-sv2023 = []
-svvpi = []
 trace = []

difftest/online_dpi/src/dpi.rs

@@ -7,8 +7,8 @@ use std::sync::Mutex;
 use tracing::debug;
 
 use crate::drive::Driver;
-use crate::svdpi::SvScope;
 use crate::OfflineArgs;
+use svdpi::SvScope;
 
 pub type SvBitVecVal = u32;
 
@@ -281,8 +281,7 @@ mod dpi_export {
 }
 
 #[cfg(feature = "trace")]
-pub(crate) fn dump_wave(scope: crate::svdpi::SvScope, path: &str) {
-  use crate::svdpi;
+pub(crate) fn dump_wave(scope: svdpi::SvScope, path: &str) {
   use std::ffi::CString;
   let path_cstring = CString::new(path).unwrap();
 

difftest/online_dpi/src/drive.rs

@@ -7,8 +7,8 @@ use tracing::{debug, error, info, trace};
 
 use crate::dpi::*;
 use crate::get_t;
-use crate::svdpi::SvScope;
 use crate::OfflineArgs;
+use svdpi::SvScope;
 
 struct ShadowMem {
   mem: Vec<u8>,

difftest/online_dpi/src/lib.rs

@@ -3,9 +3,6 @@ use common::CommonArgs;
 
 pub mod dpi;
 pub mod drive;
-pub mod svdpi;
-#[cfg(feature = "svvpi")]
-pub mod svvpi;
 
 #[derive(Parser)]
 pub(crate) struct OfflineArgs {
@@ -28,17 +25,7 @@ pub(crate) struct OfflineArgs {
 pub const CYCLE_PERIOD: u64 = 20;
 
 /// get cycle
-#[cfg(any(feature = "sv2023", feature = "svvpi"))]
 pub fn get_t() -> u64 {
-  get_time() / CYCLE_PERIOD
+  svdpi::get_time() / CYCLE_PERIOD
 }
 
-#[cfg(feature = "sv2023")]
-pub fn get_time() -> u64 {
-  svdpi::get_time()
-}
-
-#[cfg(all(not(feature = "sv2023"), feature = "svvpi"))]
-pub fn get_time() -> u64 {
-  svvpi::get_time()
-}