From: Henrik Nordstrom <henrik@henriknordstrom.net>
Date: Mon, 14 Apr 2008 21:29:38 +0000 (+0200)
Subject: Add x86_64 support to XPROF_STATS
X-Git-Tag: SQUID_3_1_0_1~49^2~292
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2e158c7f324f886b0832a063b32c74d69f986ddc;p=thirdparty%2Fsquid.git

Add x86_64 support to XPROF_STATS
---

diff --git a/include/profiling.h b/include/profiling.h
index e41a2b888b..c34e6c6dd0 100644
--- a/include/profiling.h
+++ b/include/profiling.h
@@ -30,6 +30,17 @@ asm volatile ("rdtsc":"=A" (regs));
     /* Note that "rdtsc" is relatively slow OP and stalls the CPU pipes, so use it wisely */
 }
 
+#elif defined(__x86_64) || defined(__x86_64__)
+static inline hrtime_t
+get_tick(void)
+{
+    uint32_t lo, hi;
+    // Based on an example in Wikipedia
+    /* We cannot use "=A", since this would use %rax on x86_64 */
+    asm volatile ("rdtsc" : "=a" (lo), "=d" (hi));
+    return (hrtime_t)hi << 32 | lo;
+}
+
 #elif defined(__alpha)
 static inline hrtime_t
 get_tick(void)