From f1e6532ec02ad7671103ce29bc842092f8a35e77 Mon Sep 17 00:00:00 2001
From: scribam <scribam@users.noreply.github.com>
Date: Tue, 26 Jun 2018 22:11:08 +0200
Subject: [PATCH] ppu: improve fnmsub instruction

---
 rpcs3/Emu/Cell/PPUInterpreter.cpp | 2 +-
 rpcs3/Emu/Cell/PPUTranslator.cpp  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/rpcs3/Emu/Cell/PPUInterpreter.cpp b/rpcs3/Emu/Cell/PPUInterpreter.cpp
index 9806f57e6b..28cc1a65e7 100644
--- a/rpcs3/Emu/Cell/PPUInterpreter.cpp
+++ b/rpcs3/Emu/Cell/PPUInterpreter.cpp
@@ -4813,7 +4813,7 @@ bool ppu_interpreter::FMADD(ppu_thread& ppu, ppu_opcode_t op)
 
 bool ppu_interpreter::FNMSUB(ppu_thread& ppu, ppu_opcode_t op)
 {
-	ppu.fpr[op.frd] = -(ppu.fpr[op.fra] * ppu.fpr[op.frc]) + ppu.fpr[op.frb];
+	ppu.fpr[op.frd] = -(ppu.fpr[op.fra] * ppu.fpr[op.frc] - ppu.fpr[op.frb]);
 	if (UNLIKELY(op.rc)) fmt::throw_exception("%s: op.rc", __func__); //ppu_cr_set(ppu, 1, ppu.fpscr.fg, ppu.fpscr.fl, ppu.fpscr.fe, ppu.fpscr.fu);
 	return true;
 }
diff --git a/rpcs3/Emu/Cell/PPUTranslator.cpp b/rpcs3/Emu/Cell/PPUTranslator.cpp
index eb6b393c27..89f65efecd 100644
--- a/rpcs3/Emu/Cell/PPUTranslator.cpp
+++ b/rpcs3/Emu/Cell/PPUTranslator.cpp
@@ -4189,7 +4189,7 @@ void PPUTranslator::FNMSUB(ppu_opcode_t op)
 	const auto a = GetFpr(op.fra);
 	const auto b = GetFpr(op.frb);
 	const auto c = GetFpr(op.frc);
-	const auto result = m_ir->CreateFSub(b, m_ir->CreateFMul(a, c));
+	const auto result = m_ir->CreateFNeg(m_ir->CreateFSub(m_ir->CreateFMul(a, c), b));
 	SetFpr(op.frd, result);
 
 	//SetFPSCR_FR(Call(GetType<bool>(), m_pure_attr, "__fmadd_get_fr", a, b, c)); // TODO ???