From: Clifford Wolf <clifford@clifford.at>
Date: Tue, 30 Dec 2014 17:51:24 +0000 (+0100)
Subject: added hashlib::mkhash_init
X-Git-Tag: yosys-0.5~175
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=06750987331a3d832ea83f2205c56612d3506332;p=yosys.git

added hashlib::mkhash_init
---

diff --git a/kernel/hashlib.h b/kernel/hashlib.h
index c93e00a09..0b6e94a32 100644
--- a/kernel/hashlib.h
+++ b/kernel/hashlib.h
@@ -21,13 +21,15 @@ const int hashtable_size_trigger = 2;
 const int hashtable_size_factor = 3;
 
 // The XOR version of DJB2
-// (traditionally 5381 is used as starting value for the djb2 hash)
 inline unsigned int mkhash(unsigned int a, unsigned int b) {
 	return ((a << 5) + a) ^ b;
 }
 
+// traditionally 5381 is used as starting value for the djb2 hash
+const unsigned int mkhash_init = 5381;
+
 // The ADD version of DJB2
-// (use this version for cache locality in b)
+// (usunsigned int mkhashe this version for cache locality in b)
 inline unsigned int mkhash_add(unsigned int a, unsigned int b) {
 	return ((a << 5) + a) + b;
 }
@@ -96,7 +98,7 @@ struct hash_cstr_ops {
 		return true;
 	}
 	unsigned int hash(const char *a) const {
-		unsigned int hash = 5381;
+		unsigned int hash = mkhash_init;
 		while (*a)
 			 hash = mkhash(hash, *(a++));
 		 return hash;
diff --git a/kernel/rtlil.cc b/kernel/rtlil.cc
index 912df7903..cd2232c8c 100644
--- a/kernel/rtlil.cc
+++ b/kernel/rtlil.cc
@@ -2325,7 +2325,7 @@ void RTLIL::SigSpec::updhash() const
 	cover("kernel.rtlil.sigspec.hash");
 	that->pack();
 
-	that->hash_ = 5381;
+	that->hash_ = mkhash_init;
 	for (auto &c : that->chunks_)
 		if (c.wire == NULL) {
 			for (auto &v : c.data)
diff --git a/kernel/rtlil.h b/kernel/rtlil.h
index bb9e85d93..739b701f8 100644
--- a/kernel/rtlil.h
+++ b/kernel/rtlil.h
@@ -463,7 +463,7 @@ struct RTLIL::Const
 	inline int size() const { return bits.size(); }
 
 	inline unsigned int hash() const {
-		unsigned int h = 5381;
+		unsigned int h = mkhash_init;
 		for (auto b : bits)
 			mkhash(h, b);
 		return h;
diff --git a/kernel/yosys.h b/kernel/yosys.h
index a4836f35a..5f3c3577d 100644
--- a/kernel/yosys.h
+++ b/kernel/yosys.h
@@ -138,6 +138,7 @@ YOSYS_NAMESPACE_BEGIN
 using std::vector;
 using std::string;
 using hashlib::mkhash;
+using hashlib::mkhash_init;
 using hashlib::mkhash_add;
 using hashlib::mkhash_xorshift;
 using hashlib::hash_ops;