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Commit 34ca7d7b authored by Alessandro Rubini's avatar Alessandro Rubini
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time: proto-standard/arith.c: make it shorter by 192 bytes 

Signed-off-by: Alessandro Rubini's avatarAlessandro Rubini <rubini@gnudd.com>
parent 17df60f4
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Showing with 13 additions and 31 deletions
proto-standard/arith.c
View file @ 34ca7d7b
...@@ -14,41 +14,23 @@ static void normalize_pp_time(struct pp_time *t) ...@@ -14,41 +14,23 @@ static void normalize_pp_time(struct pp_time *t)
/* no 64b division please, we'll rather loop a few times */ /* no 64b division please, we'll rather loop a few times */
#define SNS_PER_S ((1000LL * 1000 * 1000) << 16) #define SNS_PER_S ((1000LL * 1000 * 1000) << 16)
/* 0 is special: it can have both negative and positive fractions */ int sign = (t->secs < 0 || (t->secs == 0 && t->scaled_nsecs < 0))
if (t->secs == 0LL) { ? -1 : 1;
while (t->scaled_nsecs > SNS_PER_S) {
t->secs++;
t->scaled_nsecs -= SNS_PER_S;
}
while (t->scaled_nsecs < -SNS_PER_S) {
t->secs--;
t->scaled_nsecs += SNS_PER_S;
}
return;
}
if (t->secs > 0LL) {
while (t->scaled_nsecs < 0) {
t->secs--;
t->scaled_nsecs += SNS_PER_S;
}
while (t->scaled_nsecs > SNS_PER_S) {
t->secs++;
t->scaled_nsecs -= SNS_PER_S;
}
return;
}
/* turn into positive, to make code shorter (don't replicate loops) */
t->secs *= sign;
t->scaled_nsecs *= sign;
/* A negative pp_time has both secs and scaled_nsecs <= 0 */ while (t->scaled_nsecs < 0) {
while (t->scaled_nsecs < -SNS_PER_S) { t->secs--;
t->secs--; t->scaled_nsecs += SNS_PER_S;
t->scaled_nsecs += SNS_PER_S;
} }
while (t->scaled_nsecs > 0) { while (t->scaled_nsecs > SNS_PER_S) {
t->secs++; t->secs++;
t->scaled_nsecs -= SNS_PER_S; t->scaled_nsecs -= SNS_PER_S;
} }
t->secs *= sign;
t->scaled_nsecs *= sign;
} }
void pp_time_add(struct pp_time *t1, struct pp_time *t2) void pp_time_add(struct pp_time *t1, struct pp_time *t2)
......
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