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Subject[PATCH 67/85] perf intel-pt: Factor out intel_pt_8b_tsc()
Date
From: Adrian Hunter <adrian.hunter@intel.com>

Factor out intel_pt_8b_tsc() so it can be reused.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190604130017.31207-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
.../util/intel-pt-decoder/intel-pt-decoder.c | 26 ++++++++++++-------
1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
index 13123b195083..c06dceb774e9 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -1369,6 +1369,21 @@ static int intel_pt_mode_tsx(struct intel_pt_decoder *decoder, bool *no_tip)
return 0;
}

+static uint64_t intel_pt_8b_tsc(uint64_t timestamp, uint64_t ref_timestamp)
+{
+ timestamp |= (ref_timestamp & (0xffULL << 56));
+
+ if (timestamp < ref_timestamp) {
+ if (ref_timestamp - timestamp > (1ULL << 55))
+ timestamp += (1ULL << 56);
+ } else {
+ if (timestamp - ref_timestamp > (1ULL << 55))
+ timestamp -= (1ULL << 56);
+ }
+
+ return timestamp;
+}
+
static void intel_pt_calc_tsc_timestamp(struct intel_pt_decoder *decoder)
{
uint64_t timestamp;
@@ -1376,15 +1391,8 @@ static void intel_pt_calc_tsc_timestamp(struct intel_pt_decoder *decoder)
decoder->have_tma = false;

if (decoder->ref_timestamp) {
- timestamp = decoder->packet.payload |
- (decoder->ref_timestamp & (0xffULL << 56));
- if (timestamp < decoder->ref_timestamp) {
- if (decoder->ref_timestamp - timestamp > (1ULL << 55))
- timestamp += (1ULL << 56);
- } else {
- if (timestamp - decoder->ref_timestamp > (1ULL << 55))
- timestamp -= (1ULL << 56);
- }
+ timestamp = intel_pt_8b_tsc(decoder->packet.payload,
+ decoder->ref_timestamp);
decoder->tsc_timestamp = timestamp;
decoder->timestamp = timestamp;
decoder->ref_timestamp = 0;
--
2.20.1
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