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Subject[PATCH perf 1/2] perf: trace-event-parse: support additional operators: '!', '~', and '!='
Date
Add support for the unary operators '!' and '~', and support '!=' so that
it is differentiated from '!'.

Signed-off-by: David Sharp <dhsharp@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Stephane Eranian <eranian@google.com>
---
tools/perf/util/trace-event-parse.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 73a0222..67fe01a 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -1107,6 +1107,9 @@ static int get_op_prio(char *op)
{
if (!op[1]) {
switch (op[0]) {
+ case '~':
+ case '!':
+ return 4;
case '*':
case '/':
case '%':
@@ -1184,6 +1187,7 @@ process_op(struct event *event, struct print_arg *arg, char **tok)
return EVENT_ERROR;
}
switch (token[0]) {
+ case '~':
case '!':
case '+':
case '-':
@@ -2109,6 +2113,21 @@ static unsigned long long eval_num_arg(void *data, int size,
left = eval_num_arg(data, size, event, arg->op.left);
right = eval_num_arg(data, size, event, arg->op.right);
switch (arg->op.op[0]) {
+ case '!':
+ switch (arg->op.op[1]) {
+ case 0:
+ val = !right;
+ break;
+ case '=':
+ val = left != right;
+ break;
+ default:
+ die("unknown op '%s'", arg->op.op);
+ }
+ break;
+ case '~':
+ val = ~right;
+ break;
case '|':
if (arg->op.op[1])
val = left || right;
--
1.7.3.1


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