wasm2asm: Implement f32/f64.copysign (#1551)

This commit implements the `copysign` instruction for the wasm2asm binary. The
implementation here is a new pass which wholesale replaces `copysign`
instructions with the equivalent bit ops and reinterpretation instructions. It's
intended that this matches Emscripten's implementation of lowering here.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/passes/pass.cpp b/src/passes/pass.cpp
index 5c43aaa4e..e820cd1fa 100644
--- a/src/passes/pass.cpp
+++ b/src/passes/pass.cpp
@@ -99,6 +99,7 @@ void PassRegistry::registerPasses() {
   registerPass("print-full", "print in full s-expression format", createFullPrinterPass);
   registerPass("print-call-graph", "print call graph", createPrintCallGraphPass);
   registerPass("relooper-jump-threading", "thread relooper jumps (fastcomp output only)", createRelooperJumpThreadingPass);
+  registerPass("remove-copysign", "removes the copysign instruction", createRemoveCopysignPass);
   registerPass("remove-imports", "removes imports and replaces them with nops", createRemoveImportsPass);
   registerPass("remove-memory", "removes memory segments", createRemoveMemoryPass);
   registerPass("remove-unused-brs", "removes breaks from locations that are not needed", createRemoveUnusedBrsPass);