From 074a760b6a2d1f83d51d288f08cb4e3f112f760b Mon Sep 17 00:00:00 2001
From: dingusdev <52434309+dingusdev@users.noreply.github.com>
Date: Mon, 13 Nov 2023 07:30:31 -0700
Subject: [PATCH] FP compare fixes

This is the start of several fixes for the floating point emulation.
---
 cpu/ppc/ppcfpopcodes.cpp | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/cpu/ppc/ppcfpopcodes.cpp b/cpu/ppc/ppcfpopcodes.cpp
index 1041fa1..5a3769b 100644
--- a/cpu/ppc/ppcfpopcodes.cpp
+++ b/cpu/ppc/ppcfpopcodes.cpp
@@ -998,8 +998,7 @@ void dppc_interpreter::ppc_fcmpo() {
         cmp_c |= (1 << CRx_bit::CR_EQ);
     }
 
-    ppc_state.fpscr &= ~(FPSCR::FPRF);
-    ppc_state.fpscr |= (cmp_c << 12);
+    ppc_state.fpscr = (cmp_c >> 16);
     ppc_state.cr = ((ppc_state.cr & ~(0xF0000000 >> crf_d)) | ((cmp_c) >> crf_d));
 
     if (std::isnan(db_test_a) || std::isnan(db_test_b)) {
@@ -1032,8 +1031,7 @@ void dppc_interpreter::ppc_fcmpu() {
         cmp_c |= (1 << CRx_bit::CR_EQ);
     }
 
-    ppc_state.fpscr &= ~(FPSCR::FPRF);
-    ppc_state.fpscr |= (cmp_c << 12);
+    ppc_state.fpscr = (cmp_c >> 16);
     ppc_state.cr = ((ppc_state.cr & ~(0xF0000000 >> crf_d)) | ((cmp_c) >> crf_d));
 
     //if (std::isnan(db_test_a) || std::isnan(db_test_b)) {