From 566f6d75bdbf6ad85e191017facbb642ccc4059b Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Wed, 24 May 2017 15:25:44 +0200
Subject: [PATCH] partial_idct_test,InitInput: fix rollover in mult

promote coeff to signed 64-bit to avoid exceeding integer bounds when
squaring the value

Change-Id: If77bef6bc0a6a4c39ca3013e5e2ddb426a1c6e1f
---
 test/partial_idct_test.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/partial_idct_test.cc b/test/partial_idct_test.cc
index babd7fcc2..c76308bbb 100644
--- a/test/partial_idct_test.cc
+++ b/test/partial_idct_test.cc
@@ -133,7 +133,7 @@ class PartialIDctTest : public ::testing::TestWithParam<PartialInvTxfmParam> {
     for (int j = 0; j < last_nonzero_; ++j) {
       tran_low_t coeff = static_cast<tran_low_t>(
           sqrt(1.0 * max_energy_leftover) * (rnd_.Rand16() - 32768) / 65536);
-      max_energy_leftover -= coeff * coeff;
+      max_energy_leftover -= static_cast<int64_t>(coeff) * coeff;
       if (max_energy_leftover < 0) {
         max_energy_leftover = 0;
         coeff = 0;
-- 
2.40.0