Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(146)

Issues Search
    My Issues | Starred     Open | Closed | All

Unified Diff: src/runtime/runtime-maths.cc

Issue 1021183002: [turbofan] Turn Math.clz32 into an inlinable builtin. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 9 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « src/runtime/runtime.h ('k') | src/x64/assembler-x64.h » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: src/runtime/runtime-maths.cc
diff --git a/src/runtime/runtime-maths.cc b/src/runtime/runtime-maths.cc
index a4435e09e98c63d229b7aac4a3b0943af2efed03..2941b580f57b5c3388eac94d7232c863de744e91 100644
--- a/src/runtime/runtime-maths.cc
+++ b/src/runtime/runtime-maths.cc
@@ -112,6 +112,17 @@ RUNTIME_FUNCTION(Runtime_MathExpRT) {
}
+RUNTIME_FUNCTION(Runtime_MathClz32) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 1);
+ isolate->counters()->math_clz32()->Increment();
+
+ CONVERT_NUMBER_CHECKED(uint32_t, x, Uint32, args[0]);
+ return *isolate->factory()->NewNumberFromUint(
+ base::bits::CountLeadingZeros32(x));
+}
+
+
RUNTIME_FUNCTION(Runtime_MathFloor) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
« no previous file with comments | « src/runtime/runtime.h ('k') | src/x64/assembler-x64.h » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698