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Unified Diff: src/runtime.cc

Issue 78873006: Embed trigonometric lookup table. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: tiny fixes Created 7 years, 1 month ago
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Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index f546629df55af36ad15b22409ecaeef0b83075d9..c11a00528d02e37bce4826d5cf180bf85c795b78 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -7848,35 +7848,6 @@ 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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