From 54738e82755f73080e779ba0c8052e232df24d78 Mon Sep 17 00:00:00 2001
From: Richard Purdie <rpurdie@rpsys.net>
Date: Mon, 15 Aug 2005 20:42:32 +0100
Subject: [PATCH] ARM: 2851/1: Fix NWFPE extended precision exception handling

Patch from Richard Purdie

The exception handling code fails to compile if the extended
precision mode is enabled. This patch fixes those compile errors and
also stops _quiet functions from incorrectly raising exceptions.
Reported-by: Ralph Siemsen <ralphs@netwinder.org>

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/nwfpe/softfloat.c | 34 ++++++++++------------------------
 1 file changed, 10 insertions(+), 24 deletions(-)

diff --git a/arch/arm/nwfpe/softfloat.c b/arch/arm/nwfpe/softfloat.c
index 8b75a6e7cb3..f9f049132a1 100644
--- a/arch/arm/nwfpe/softfloat.c
+++ b/arch/arm/nwfpe/softfloat.c
@@ -1602,9 +1602,7 @@ flag float32_le_quiet( float32 a, float32 b )
     if (    ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
          || ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
        ) {
-        if ( float32_is_signaling_nan( a ) || float32_is_signaling_nan( b ) ) {
-            float_raise( float_flag_invalid );
-        }
+        /* Do nothing, even if NaN as we're quiet */
         return 0;
     }
     aSign = extractFloat32Sign( a );
@@ -1629,9 +1627,7 @@ flag float32_lt_quiet( float32 a, float32 b )
     if (    ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
          || ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
        ) {
-        if ( float32_is_signaling_nan( a ) || float32_is_signaling_nan( b ) ) {
-            float_raise( float_flag_invalid );
-        }
+        /* Do nothing, even if NaN as we're quiet */
         return 0;
     }
     aSign = extractFloat32Sign( a );
@@ -2493,9 +2489,7 @@ flag float64_le_quiet( float64 a, float64 b )
     if (    ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
          || ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
        ) {
-        if ( float64_is_signaling_nan( a ) || float64_is_signaling_nan( b ) ) {
-            float_raise( float_flag_invalid );
-        }
+        /* Do nothing, even if NaN as we're quiet */
         return 0;
     }
     aSign = extractFloat64Sign( a );
@@ -2520,9 +2514,7 @@ flag float64_lt_quiet( float64 a, float64 b )
     if (    ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
          || ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
        ) {
-        if ( float64_is_signaling_nan( a ) || float64_is_signaling_nan( b ) ) {
-            float_raise( float_flag_invalid );
-        }
+        /* Do nothing, even if NaN as we're quiet */
         return 0;
     }
     aSign = extractFloat64Sign( a );
@@ -3256,7 +3248,7 @@ flag floatx80_eq( floatx80 a, floatx80 b )
        ) {
         if (    floatx80_is_signaling_nan( a )
              || floatx80_is_signaling_nan( b ) ) {
-            roundData->exception |= float_flag_invalid;
+            float_raise( float_flag_invalid );
         }
         return 0;
     }
@@ -3286,7 +3278,7 @@ flag floatx80_le( floatx80 a, floatx80 b )
          || (    ( extractFloatx80Exp( b ) == 0x7FFF )
               && (bits64) ( extractFloatx80Frac( b )<<1 ) )
        ) {
-        roundData->exception |= float_flag_invalid;
+        float_raise( float_flag_invalid );
         return 0;
     }
     aSign = extractFloatx80Sign( a );
@@ -3320,7 +3312,7 @@ flag floatx80_lt( floatx80 a, floatx80 b )
          || (    ( extractFloatx80Exp( b ) == 0x7FFF )
               && (bits64) ( extractFloatx80Frac( b )<<1 ) )
        ) {
-        roundData->exception |= float_flag_invalid;
+        float_raise( float_flag_invalid );
         return 0;
     }
     aSign = extractFloatx80Sign( a );
@@ -3353,7 +3345,7 @@ flag floatx80_eq_signaling( floatx80 a, floatx80 b )
          || (    ( extractFloatx80Exp( b ) == 0x7FFF )
               && (bits64) ( extractFloatx80Frac( b )<<1 ) )
        ) {
-        roundData->exception |= float_flag_invalid;
+        float_raise( float_flag_invalid );
         return 0;
     }
     return
@@ -3382,10 +3374,7 @@ flag floatx80_le_quiet( floatx80 a, floatx80 b )
          || (    ( extractFloatx80Exp( b ) == 0x7FFF )
               && (bits64) ( extractFloatx80Frac( b )<<1 ) )
        ) {
-        if (    floatx80_is_signaling_nan( a )
-             || floatx80_is_signaling_nan( b ) ) {
-            roundData->exception |= float_flag_invalid;
-        }
+        /* Do nothing, even if NaN as we're quiet */
         return 0;
     }
     aSign = extractFloatx80Sign( a );
@@ -3419,10 +3408,7 @@ flag floatx80_lt_quiet( floatx80 a, floatx80 b )
          || (    ( extractFloatx80Exp( b ) == 0x7FFF )
               && (bits64) ( extractFloatx80Frac( b )<<1 ) )
        ) {
-        if (    floatx80_is_signaling_nan( a )
-             || floatx80_is_signaling_nan( b ) ) {
-            roundData->exception |= float_flag_invalid;
-        }
+        /* Do nothing, even if NaN as we're quiet */
         return 0;
     }
     aSign = extractFloatx80Sign( a );
-- 
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