From ebce385d616d20bb3cd39668fd348eff4a18017a Mon Sep 17 00:00:00 2001
From: Tomasz Kulasek <tomaszx.kulasek@intel.com>
Date: Mon, 4 Feb 2019 12:07:39 +0100
Subject: [PATCH] lib/util/cpuset: add negate and xor

Change-Id: I8d2fc9d0fcc6cb8b088c307d1520f0b1051c3ef6
Signed-off-by: Tomasz Kulasek <tomaszx.kulasek@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/443518
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
---
 include/spdk/cpuset.h | 15 +++++++++++++++
 lib/util/cpuset.c     | 21 +++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/include/spdk/cpuset.h b/include/spdk/cpuset.h
index d59305714..153fe0fae 100644
--- a/include/spdk/cpuset.h
+++ b/include/spdk/cpuset.h
@@ -100,6 +100,21 @@ void spdk_cpuset_and(struct spdk_cpuset *dst, const struct spdk_cpuset *src);
  */
 void spdk_cpuset_or(struct spdk_cpuset *dst, const struct spdk_cpuset *src);
 
+/**
+ * Perform XOR operation on two CPU sets. The result is stored in dst.
+ *
+ * \param dst First argument of operation. This value also stores the result of operation.
+ * \param src Second argument of operation.
+ */
+void spdk_cpuset_xor(struct spdk_cpuset *dst, const struct spdk_cpuset *src);
+
+/**
+ * Negate all CPUs in CPU set.
+ *
+ * \param set CPU set to be negated. This value also stores the result of operation.
+ */
+void spdk_cpuset_negate(struct spdk_cpuset *set);
+
 /**
  * Clear all CPUs in CPU set.
  *
diff --git a/lib/util/cpuset.c b/lib/util/cpuset.c
index de9fbfb63..a1a8dd2e7 100644
--- a/lib/util/cpuset.c
+++ b/lib/util/cpuset.c
@@ -67,6 +67,16 @@ spdk_cpuset_copy(struct spdk_cpuset *set1, const struct spdk_cpuset *set2)
 	memcpy(&set1->cpus, &set2->cpus, sizeof(set2->cpus));
 }
 
+void
+spdk_cpuset_negate(struct spdk_cpuset *set)
+{
+	unsigned int i;
+	assert(set != NULL);
+	for (i = 0; i < sizeof(set->cpus); i++) {
+		set->cpus[i] = ~set->cpus[i];
+	}
+}
+
 void
 spdk_cpuset_and(struct spdk_cpuset *set1, const struct spdk_cpuset *set2)
 {
@@ -89,6 +99,17 @@ spdk_cpuset_or(struct spdk_cpuset *set1, const struct spdk_cpuset *set2)
 	}
 }
 
+void
+spdk_cpuset_xor(struct spdk_cpuset *set1, const struct spdk_cpuset *set2)
+{
+	unsigned int i;
+	assert(set1 != NULL);
+	assert(set2 != NULL);
+	for (i = 0; i < sizeof(set2->cpus); i++) {
+		set1->cpus[i] ^= set2->cpus[i];
+	}
+}
+
 void
 spdk_cpuset_zero(struct spdk_cpuset *set)
 {