Reset enviroment for math_tests

Bug: 17390824
Change-Id: I42f4c8d9199a2efe7641f0b0e64580cacb5695da

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/math_test.cpp b/tests/math_test.cpp
index b4f5b1427..ad4654e53 100644
--- a/tests/math_test.cpp
+++ b/tests/math_test.cpp
@@ -53,6 +53,8 @@ template<typename T> inline int test_capture_isinf(const T in) {
 #include <limits.h>
 #include <stdint.h>
 
+#include <private/ScopeGuard.h>
+
 float float_subnormal() {
   union {
     float f;
@@ -760,6 +762,10 @@ TEST(math, erfcl) {
 }
 
 TEST(math, lrint) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
+
   fesetround(FE_UPWARD); // lrint/lrintf/lrintl obey the rounding mode.
   ASSERT_EQ(1235, lrint(1234.01));
   ASSERT_EQ(1235, lrintf(1234.01f));
@@ -780,6 +786,10 @@ TEST(math, lrint) {
 }
 
 TEST(math, rint) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
+
   fesetround(FE_UPWARD); // rint/rintf/rintl obey the rounding mode.
   feclearexcept(FE_ALL_EXCEPT); // rint/rintf/rintl do set the FE_INEXACT flag.
   ASSERT_EQ(1234.0, rint(1234.0));
@@ -806,6 +816,9 @@ TEST(math, rint) {
 }
 
 TEST(math, nearbyint) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
   fesetround(FE_UPWARD); // nearbyint/nearbyintf/nearbyintl obey the rounding mode.
   feclearexcept(FE_ALL_EXCEPT); // nearbyint/nearbyintf/nearbyintl don't set the FE_INEXACT flag.
   ASSERT_EQ(1234.0, nearbyint(1234.0));
@@ -832,6 +845,9 @@ TEST(math, nearbyint) {
 }
 
 TEST(math, lround) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
   fesetround(FE_UPWARD); // lround ignores the rounding mode.
   ASSERT_EQ(1234, lround(1234.01));
   ASSERT_EQ(1234, lroundf(1234.01f));
@@ -839,6 +855,9 @@ TEST(math, lround) {
 }
 
 TEST(math, llround) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
   fesetround(FE_UPWARD); // llround ignores the rounding mode.
   ASSERT_EQ(1234L, llround(1234.01));
   ASSERT_EQ(1234L, llroundf(1234.01f));
@@ -933,6 +952,9 @@ TEST(math, fdiml) {
 }
 
 TEST(math, round) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
   fesetround(FE_TOWARDZERO); // round ignores the rounding mode and always rounds away from zero.
   ASSERT_DOUBLE_EQ(1.0, round(0.5));
   ASSERT_DOUBLE_EQ(-1.0, round(-0.5));
@@ -943,6 +965,9 @@ TEST(math, round) {
 }
 
 TEST(math, roundf) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
   fesetround(FE_TOWARDZERO); // roundf ignores the rounding mode and always rounds away from zero.
   ASSERT_FLOAT_EQ(1.0f, roundf(0.5f));
   ASSERT_FLOAT_EQ(-1.0f, roundf(-0.5f));
@@ -953,6 +978,9 @@ TEST(math, roundf) {
 }
 
 TEST(math, roundl) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
   fesetround(FE_TOWARDZERO); // roundl ignores the rounding mode and always rounds away from zero.
   ASSERT_DOUBLE_EQ(1.0L, roundl(0.5L));
   ASSERT_DOUBLE_EQ(-1.0L, roundl(-0.5L));
@@ -963,6 +991,9 @@ TEST(math, roundl) {
 }
 
 TEST(math, trunc) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
   fesetround(FE_UPWARD); // trunc ignores the rounding mode and always rounds toward zero.
   ASSERT_DOUBLE_EQ(1.0, trunc(1.5));
   ASSERT_DOUBLE_EQ(-1.0, trunc(-1.5));
@@ -973,6 +1004,9 @@ TEST(math, trunc) {
 }
 
 TEST(math, truncf) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
   fesetround(FE_UPWARD); // truncf ignores the rounding mode and always rounds toward zero.
   ASSERT_FLOAT_EQ(1.0f, truncf(1.5f));
   ASSERT_FLOAT_EQ(-1.0f, truncf(-1.5f));
@@ -983,6 +1017,9 @@ TEST(math, truncf) {
 }
 
 TEST(math, truncl) {
+  auto guard = create_scope_guard([]() {
+    fesetenv(FE_DFL_ENV);
+  });
   fesetround(FE_UPWARD); // truncl ignores the rounding mode and always rounds toward zero.
   ASSERT_DOUBLE_EQ(1.0L, truncl(1.5L));
   ASSERT_DOUBLE_EQ(-1.0L, truncl(-1.5L));