From 1635f1ccd75d62b4887cace0abc0a91626ffd173 Mon Sep 17 00:00:00 2001
From: Toni Wilen <twilen@winuae.net>
Date: Sat, 11 Mar 2017 22:32:24 +0200
Subject: [PATCH] Fix JIT FPU support.

---
 fpp.cpp                 | 44 ++++++++++++++++++++++++++++++++---------
 jit/compemu_support.cpp |  2 +-
 2 files changed, 36 insertions(+), 10 deletions(-)

diff --git a/fpp.cpp b/fpp.cpp
index a12c3334..2daea2d5 100644
--- a/fpp.cpp
+++ b/fpp.cpp
@@ -606,11 +606,6 @@ uae_u32 fpp_get_fpsr (void)
     return regs.fpsr;
 }
 
-static void fpp_set_fpsr (uae_u32 val)
-{
-    regs.fpsr = val;
-}
-
 static void fpp_set_fpcr (uae_u32 val)
 {
 	fpp_set_mode(val);
@@ -631,6 +626,25 @@ static void fpset (fpdata *fpd, uae_s32 val)
     fpp_from_int(fpd, val);
 }
 
+static void fpp_set_fpsr (uae_u32 val)
+{
+    regs.fpsr = val;
+
+#ifdef JIT
+	// check comment in fpp_cond
+	if (currprefs.compfpu) {
+		if (val & 0x01000000)
+			fpnan(&regs.fp_result);
+		else if (val & 0x04000000)
+			fpset(&regs.fp_result, 0);
+		else if (val & 0x08000000)
+			fpset(&regs.fp_result, -1);
+		else
+			fpset(&regs.fp_result, 1);
+	}
+#endif
+}
+
 bool fpu_get_constant(fpdata *fpd, int cr)
 {
     uae_u32 *f = NULL;
@@ -1812,11 +1826,23 @@ static int get_fp_ad (uae_u32 opcode, uae_u32 * ad)
 
 int fpp_cond (int condition)
 {
-	int NotANumber = (regs.fpsr & FPSR_CC_NAN) != 0;
-	int N = (regs.fpsr & FPSR_CC_N) != 0;
-	int Z = (regs.fpsr & FPSR_CC_Z) != 0;
+	int NotANumber, N, Z;
+
+#ifdef JIT
+	if (currprefs.compfpu) {
+		// JIT reads and writes regs.fpu_result
+		NotANumber = fpp_is_nan(&regs.fp_result);
+		N = fpp_is_neg(&regs.fp_result);
+		Z = fpp_is_zero(&regs.fp_result);
+	} else
+#endif
+	{
+		NotANumber = (regs.fpsr & FPSR_CC_NAN) != 0;
+		N = (regs.fpsr & FPSR_CC_N) != 0;
+		Z = (regs.fpsr & FPSR_CC_Z) != 0;
+	}
 
-    if ((condition & 0x10) && NotANumber) {
+	if ((condition & 0x10) && NotANumber) {
         if (fpsr_set_bsun())
             return -2;
     }
diff --git a/jit/compemu_support.cpp b/jit/compemu_support.cpp
index 03312d02..4afbc371 100644
--- a/jit/compemu_support.cpp
+++ b/jit/compemu_support.cpp
@@ -2789,7 +2789,7 @@ void init_comp(void)
 		}
 		else if (i==FP_RESULT) {
 #ifdef UAE
-			live.fate[i].mem=(uae_u32*)(&regs.fp_result);
+			live.fate[i].mem=(uae_u32*)(&regs.fp_result.fp);
 #else
 			live.fate[i].mem=(uae_u32*)(&fpu.result);
 #endif
-- 
2.47.3