From 2c7e2e351aa2c40daedfd8ddac3ef868ebac0f2c Mon Sep 17 00:00:00 2001
From: Ali Mohammad Pur <ali.mpfard@gmail.com>
Date: Mon, 30 Aug 2021 16:21:21 +0430
Subject: [PATCH] LibWasm: Implement fx.nearest using nearbyint() instead of
 round()

This instruction wants RoundingMode::ToEven, so let's use the correct
function.
---
 .../LibWasm/AbstractMachine/BytecodeInterpreter.cpp         | 4 ++--
 Userland/Libraries/LibWasm/AbstractMachine/Operators.h      | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Userland/Libraries/LibWasm/AbstractMachine/BytecodeInterpreter.cpp b/Userland/Libraries/LibWasm/AbstractMachine/BytecodeInterpreter.cpp
index a8f0301bdd..d472da2f96 100644
--- a/Userland/Libraries/LibWasm/AbstractMachine/BytecodeInterpreter.cpp
+++ b/Userland/Libraries/LibWasm/AbstractMachine/BytecodeInterpreter.cpp
@@ -824,7 +824,7 @@ void BytecodeInterpreter::interpret(Configuration& configuration, InstructionPoi
     case Instructions::f32_trunc.value():
         return unary_operation<float, float, Operators::Truncate>(configuration);
     case Instructions::f32_nearest.value():
-        return unary_operation<float, float, Operators::Round>(configuration);
+        return unary_operation<float, float, Operators::NearbyIntegral>(configuration);
     case Instructions::f32_sqrt.value():
         return unary_operation<float, float, Operators::SquareRoot>(configuration);
     case Instructions::f32_add.value():
@@ -852,7 +852,7 @@ void BytecodeInterpreter::interpret(Configuration& configuration, InstructionPoi
     case Instructions::f64_trunc.value():
         return unary_operation<double, double, Operators::Truncate>(configuration);
     case Instructions::f64_nearest.value():
-        return unary_operation<double, double, Operators::Round>(configuration);
+        return unary_operation<double, double, Operators::NearbyIntegral>(configuration);
     case Instructions::f64_sqrt.value():
         return unary_operation<double, double, Operators::SquareRoot>(configuration);
     case Instructions::f64_add.value():
diff --git a/Userland/Libraries/LibWasm/AbstractMachine/Operators.h b/Userland/Libraries/LibWasm/AbstractMachine/Operators.h
index ecb13f37e7..aac34ce7c6 100644
--- a/Userland/Libraries/LibWasm/AbstractMachine/Operators.h
+++ b/Userland/Libraries/LibWasm/AbstractMachine/Operators.h
@@ -271,14 +271,14 @@ struct Truncate {
 
     static StringView name() { return "truncate"; }
 };
-struct Round {
+struct NearbyIntegral {
     template<typename Lhs>
     auto operator()(Lhs lhs) const
     {
         if constexpr (IsSame<Lhs, float>)
-            return roundf(lhs);
+            return nearbyintf(lhs);
         else if constexpr (IsSame<Lhs, double>)
-            return round(lhs);
+            return nearbyint(lhs);
         else
             VERIFY_NOT_REACHED();
     }