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Unified Diff: src/runtime.cc

Issue 50563003: Implement Math.sin, cos and tan using table lookup and spline interpolation. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 2 months ago
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Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 15cfc854bfad6501cab80faed3743f81663fc629..daba8df44a451f25d1ed2500d0acd2ed8baf93f7 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -5426,6 +5426,20 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SetNativeFlag) {
}
+RUNTIME_FUNCTION(MaybeObject*, Runtime_SetInlineBuiltinFlag) {
+ SealHandleScope shs(isolate);
+ RUNTIME_ASSERT(args.length() == 1);
+
+ Handle<Object> object = args.at<Object>(0);
+
+ if (object->IsJSFunction()) {
+ JSFunction* func = JSFunction::cast(*object);
+ func->shared()->set_inline_builtin(true);
+ }
+ return isolate->heap()->undefined_value();
+}
+
+
RUNTIME_FUNCTION(MaybeObject*, Runtime_StoreArrayLiteralElement) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 5);
@@ -7847,6 +7861,35 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_Math_tan) {
}
+RUNTIME_FUNCTION(MaybeObject*, Runtime_PopulateTrigonometricTable) {
+ HandleScope scope(isolate);
+ ASSERT(args.length() == 3);
+ CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, sin_table, 0);
+ CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, cos_table, 1);
+ CONVERT_SMI_ARG_CHECKED(samples, 2);
+ RUNTIME_ASSERT(sin_table->type() == kExternalDoubleArray);
+ RUNTIME_ASSERT(cos_table->type() == kExternalDoubleArray);
+ double* sin_buffer = reinterpret_cast<double*>(
+ JSArrayBuffer::cast(sin_table->buffer())->backing_store());
+ double* cos_buffer = reinterpret_cast<double*>(
+ JSArrayBuffer::cast(cos_table->buffer())->backing_store());
+
+ static const double pi_half = 3.1415926535897932 / 2;
+ double interval = pi_half / samples;
+ for (int i = 0; i < samples + 1; i++) {
+ double sample = sin(i * interval);
+ sin_buffer[i] = sample;
+ cos_buffer[samples - i] = sample * interval;
+ }
+
+ // Fill this to catch out of bound accesses when calculating Math.sin(pi/2).
+ sin_buffer[samples + 1] = sin(pi_half + interval);
+ cos_buffer[samples + 1] = cos(pi_half + interval) * interval;
+
+ return isolate->heap()->undefined_value();
+}
+
+
RUNTIME_FUNCTION(MaybeObject*, Runtime_DateMakeDay) {
SealHandleScope shs(isolate);
ASSERT(args.length() == 2);
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