linux-kernel - [PATCH 2/2] perf expr: Add

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Message-Id: <20200610051717.170457-2-irogers@google.com>
Date:   Tue,  9 Jun 2020 22:17:16 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Jin Yao <yao.jin@...ux.intel.com>,
        John Garry <john.garry@...wei.com>,
        Paul Clarke <pc@...ibm.com>, Kajol Jain <kjain@...ux.ibm.com>,
        linux-kernel@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>,
        linux-perf-users@...r.kernel.org, Ian Rogers <irogers@...gle.com>
Subject: [PATCH 2/2] perf expr: Add < and > operators

These are broadly useful and necessary for Intel's top-down analysis.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/expr.l | 2 ++
 tools/perf/util/expr.y | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/expr.l b/tools/perf/util/expr.l
index 298d86660a96..13e5e3c75f56 100644
--- a/tools/perf/util/expr.l
+++ b/tools/perf/util/expr.l
@@ -111,6 +111,8 @@ else		{ return ELSE; }
 "|"		{ return '|'; }
 "^"		{ return '^'; }
 "&"		{ return '&'; }
+"<"		{ return '<'; }
+">"		{ return '>'; }
 "-"		{ return '-'; }
 "+"		{ return '+'; }
 "*"		{ return '*'; }
diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y
index fe145344bb39..5fcb98800f9c 100644
--- a/tools/perf/util/expr.y
+++ b/tools/perf/util/expr.y
@@ -41,6 +41,7 @@ static double d_ratio(double val0, double val1)
 %left '|'
 %left '^'
 %left '&'
+%left '<' '>'
 %left '-' '+'
 %left '*' '/' '%'
 %left NEG NOT
@@ -73,7 +74,7 @@ other: ID
 |
 MIN | MAX | IF | ELSE | SMT_ON | NUMBER | '|' | '^' | '&' | '-' | '+' | '*' | '/' | '%' | '(' | ')' | ','
 |
-D_RATIO
+'<' | '>' | D_RATIO
 
 all_expr: if_expr			{ *final_val = $1; }
 	;
@@ -94,6 +95,8 @@ expr:	  NUMBER
 	| expr '|' expr		{ $$ = (long)$1 | (long)$3; }
 	| expr '&' expr		{ $$ = (long)$1 & (long)$3; }
 	| expr '^' expr		{ $$ = (long)$1 ^ (long)$3; }
+	| expr '<' expr		{ $$ = $1 < $3; }
+	| expr '>' expr		{ $$ = $1 > $3; }
 	| expr '+' expr		{ $$ = $1 + $3; }
 	| expr '-' expr		{ $$ = $1 - $3; }
 	| expr '*' expr		{ $$ = $1 * $3; }
-- 
2.27.0.278.ge193c7cf3a9-goog