[Qemu-devel] [PATCH 3/7] softfloat: define 680x0 specific values

[Laurent Vivier <laurent@vivier.eu>]

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 fpu/softfloat-specialize.h | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h
index f5aed72..8bd3fa9 100644
--- a/fpu/softfloat-specialize.h
+++ b/fpu/softfloat-specialize.h
@@ -111,7 +111,7 @@ float16 float16_default_nan(float_status *status)
 *----------------------------------------------------------------------------*/
 float32 float32_default_nan(float_status *status)
 {
-#if defined(TARGET_SPARC)
+#if defined(TARGET_SPARC) || defined(TARGET_M68K)
     return const_float32(0x7FFFFFFF);
 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) || \
       defined(TARGET_XTENSA) || defined(TARGET_S390X) || defined(TARGET_TRICORE)
@@ -134,7 +134,7 @@ float32 float32_default_nan(float_status *status)
 *----------------------------------------------------------------------------*/
 float64 float64_default_nan(float_status *status)
 {
-#if defined(TARGET_SPARC)
+#if defined(TARGET_SPARC) || defined(TARGET_M68K)
     return const_float64(LIT64(0x7FFFFFFFFFFFFFFF));
 #elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) || \
       defined(TARGET_S390X)
@@ -158,7 +158,10 @@ float64 float64_default_nan(float_status *status)
 floatx80 floatx80_default_nan(float_status *status)
 {
     floatx80 r;
-
+#if defined(TARGET_M68K)
+    r.low = LIT64(0xFFFFFFFFFFFFFFFF);
+    r.high = 0x7FFF;
+#else
     if (status->snan_bit_is_one) {
         r.low = LIT64(0xBFFFFFFFFFFFFFFF);
         r.high = 0x7FFF;
@@ -166,6 +169,7 @@ floatx80 floatx80_default_nan(float_status *status)
         r.low = LIT64(0xC000000000000000);
         r.high = 0xFFFF;
     }
+#endif
     return r;
 }
 
@@ -491,6 +495,26 @@ static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN,
         return 1;
     }
 }
+#elif defined(TARGET_M68K)
+static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN,
+                   flag aIsLargerSignificand)
+{
+    /* If either operand, but not both operands, of an operation is a
+     * nonsignaling NAN, then that NAN is returned as the result. If both
+     * operands are nonsignaling NANs, then the destination operand
+     * nonsignaling NAN is returned as the result.
+     */
+
+    if (aIsSNaN) {
+        return 0;
+    } else if (bIsSNaN) {
+        return 1;
+    } else if (bIsQNaN) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
 #else
 static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN,
                     flag aIsLargerSignificand)
-- 
2.7.4