[builtins] Unify Atanh, Cbrt and Expm1 as exports from flibm.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index 14b993abbbb4822075f824a569799f1b5c879e51..fa2d38fed2231689a7abe13b2387250ce18c5342 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -1568,6 +1568,11 @@ ExternalReference ExternalReference::ieee754_atan2_function(Isolate* isolate) {
       isolate, FUNCTION_ADDR(base::ieee754::atan2), BUILTIN_FP_FP_CALL));
 }
 
+ExternalReference ExternalReference::ieee754_atanh_function(Isolate* isolate) {
+  return ExternalReference(Redirect(
+      isolate, FUNCTION_ADDR(base::ieee754::atanh), BUILTIN_FP_FP_CALL));
+}
+
 ExternalReference ExternalReference::ieee754_exp_function(Isolate* isolate) {
   return ExternalReference(
       Redirect(isolate, FUNCTION_ADDR(base::ieee754::exp), BUILTIN_FP_CALL));
@@ -1593,6 +1598,16 @@ ExternalReference ExternalReference::ieee754_log10_function(Isolate* isolate) {
       Redirect(isolate, FUNCTION_ADDR(base::ieee754::log10), BUILTIN_FP_CALL));
 }
 
+ExternalReference ExternalReference::ieee754_cbrt_function(Isolate* isolate) {
+  return ExternalReference(Redirect(isolate, FUNCTION_ADDR(base::ieee754::cbrt),
+                                    BUILTIN_FP_FP_CALL));
+}
+
+ExternalReference ExternalReference::ieee754_expm1_function(Isolate* isolate) {
+  return ExternalReference(Redirect(
+      isolate, FUNCTION_ADDR(base::ieee754::expm1), BUILTIN_FP_FP_CALL));
+}
+
 ExternalReference ExternalReference::page_flags(Page* page) {
   return ExternalReference(reinterpret_cast<Address>(page) +
                            MemoryChunk::kFlagsOffset);