[wasm] Provide backoff implementations for the Fxx rounding instructions

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index c0b54df8aa012f53552ee6cfd03f60dc0fee9f12..0b272f8b1b6df7d2fc47a9bef973e3072a4bf40b 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -1132,11 +1132,66 @@ ExternalReference ExternalReference::compute_output_frames_function(
       Redirect(isolate, FUNCTION_ADDR(Deoptimizer::ComputeOutputFrames)));
 }
 
-static void trunc64_wrapper(double* param) { *param = trunc(*param); }
+static void f32_trunc_wrapper(float* param) { *param = truncf(*param); }
 
-ExternalReference ExternalReference::trunc64_wrapper_function(
+ExternalReference ExternalReference::f32_trunc_wrapper_function(
     Isolate* isolate) {
-  return ExternalReference(Redirect(isolate, FUNCTION_ADDR(trunc64_wrapper)));
+  return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f32_trunc_wrapper)));
+}
+
+static void f32_floor_wrapper(float* param) { *param = floorf(*param); }
+
+ExternalReference ExternalReference::f32_floor_wrapper_function(
+    Isolate* isolate) {
+  return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f32_floor_wrapper)));
+}
+
+static void f32_ceil_wrapper(float* param) { *param = ceilf(*param); }
+
+ExternalReference ExternalReference::f32_ceil_wrapper_function(
+    Isolate* isolate) {
+  return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f32_ceil_wrapper)));
+}
+
+static void f32_nearest_int_wrapper(float* param) {
+  *param = nearbyintf(*param);
+}
+
+ExternalReference ExternalReference::f32_nearest_int_wrapper_function(
+    Isolate* isolate) {
+  return ExternalReference(
+      Redirect(isolate, FUNCTION_ADDR(f32_nearest_int_wrapper)));
+}
+
+static void f64_trunc_wrapper(double* param) { *param = trunc(*param); }
+
+ExternalReference ExternalReference::f64_trunc_wrapper_function(
+    Isolate* isolate) {
+  return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_trunc_wrapper)));
+}
+
+static void f64_floor_wrapper(double* param) { *param = floor(*param); }
+
+ExternalReference ExternalReference::f64_floor_wrapper_function(
+    Isolate* isolate) {
+  return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_floor_wrapper)));
+}
+
+static void f64_ceil_wrapper(double* param) { *param = ceil(*param); }
+
+ExternalReference ExternalReference::f64_ceil_wrapper_function(
+    Isolate* isolate) {
+  return ExternalReference(Redirect(isolate, FUNCTION_ADDR(f64_ceil_wrapper)));
+}
+
+static void f64_nearest_int_wrapper(double* param) {
+  *param = nearbyint(*param);
+}
+
+ExternalReference ExternalReference::f64_nearest_int_wrapper_function(
+    Isolate* isolate) {
+  return ExternalReference(
+      Redirect(isolate, FUNCTION_ADDR(f64_nearest_int_wrapper)));
 }
 
 ExternalReference ExternalReference::log_enter_external_function(