patch-2.4.22 linux-2.4.22/arch/arm/nwfpe/fpmodule.c

• Lines: 180
• Date: 2003-08-25 04:44:39.000000000 -0700
• Orig file: linux-2.4.21/arch/arm/nwfpe/fpmodule.c
• Orig date: 2002-08-02 17:39:42.000000000 -0700

diff -urN linux-2.4.21/arch/arm/nwfpe/fpmodule.c linux-2.4.22/arch/arm/nwfpe/fpmodule.c
@@ -41,13 +41,19 @@
 #include "fpa11.inl"
 
 /* kernel symbols required for signal handling */
-typedef struct task_struct*	PTASK;
+typedef struct task_struct *PTASK;
+
+#ifdef CONFIG_FPE_NWFPE_XP
+#define NWFPE_BITS "extended"
+#else
+#define NWFPE_BITS "double"
+#endif
 
 #ifdef MODULE
 void fp_send_sig(unsigned long sig, PTASK p, int priv);
 #if LINUX_VERSION_CODE > 0x20115
 MODULE_AUTHOR("Scott Bambrough <scottb@rebel.com>");
-MODULE_DESCRIPTION("NWFPE floating point emulator");
+MODULE_DESCRIPTION("NWFPE floating point emulator (" NWFPE_BITS " precision)");
 #endif
 
 #else
@@ -63,7 +69,7 @@
 /* external declarations for saved kernel symbols */
 extern void (*kern_fp_enter)(void);
 
-/* Original value of fp_enter from kernel before patched by fpe_init. */ 
+/* Original value of fp_enter from kernel before patched by fpe_init. */
 static void (*orig_fp_enter)(void);
 
 /* forward declarations */
@@ -76,46 +82,45 @@
  */
 static int fpe_unload(void)
 {
-  return (kern_fp_enter == nwfpe_enter) ? 0 : 1;
+	return (kern_fp_enter == nwfpe_enter) ? 0 : 1;
 }
 #endif
 
 static int __init fpe_init(void)
 {
-  if (sizeof(FPA11) > sizeof(union fp_state)) {
-    printk(KERN_ERR "nwfpe: bad structure size\n");
-    return -EINVAL;
-  }
-
-  if (sizeof(FPREG) != 12) {
-    printk(KERN_ERR "nwfpe: bad register size\n");
-    return -EINVAL;
-  }
-
+	if (sizeof(FPA11) > sizeof(union fp_state)) {
+		printk(KERN_ERR "nwfpe: bad structure size\n");
+		return -EINVAL;
+	}
+
+	if (sizeof(FPREG) != 12) {
+		printk(KERN_ERR "nwfpe: bad register size\n");
+		return -EINVAL;
+	}
 #ifdef MODULE
-  if (!mod_member_present(&__this_module, can_unload))
-    return -EINVAL;
-  __this_module.can_unload = fpe_unload;
+	if (!mod_member_present(&__this_module, can_unload))
+		return -EINVAL;
+	__this_module.can_unload = fpe_unload;
 #else
-  if (fpe_type[0] && strcmp(fpe_type, "nwfpe"))
-    return 0;
+	if (fpe_type[0] && strcmp(fpe_type, "nwfpe"))
+		return 0;
 #endif
 
-  /* Display title, version and copyright information. */
-  printk(KERN_WARNING "NetWinder Floating Point Emulator V0.95 "
-	 "(c) 1998-1999 Rebel.com\n");
-
-  /* Save pointer to the old FP handler and then patch ourselves in */
-  orig_fp_enter = kern_fp_enter;
-  kern_fp_enter = nwfpe_enter;
+	/* Display title, version and copyright information. */
+	printk(KERN_WARNING "NetWinder Floating Point Emulator V0.97 ("
+	       NWFPE_BITS " precision)\n");
+
+	/* Save pointer to the old FP handler and then patch ourselves in */
+	orig_fp_enter = kern_fp_enter;
+	kern_fp_enter = nwfpe_enter;
 
-  return 0;
+	return 0;
 }
 
 static void __exit fpe_exit(void)
 {
-  /* Restore the values we saved earlier. */
-  kern_fp_enter = orig_fp_enter;
+	/* Restore the values we saved earlier. */
+	kern_fp_enter = orig_fp_enter;
 }
 
 /*
@@ -140,41 +145,42 @@
 
 void float_raise(signed char flags)
 {
-  register unsigned int fpsr, cumulativeTraps;
-  
+	register unsigned int fpsr, cumulativeTraps;
+
 #ifdef CONFIG_DEBUG_USER
-  printk(KERN_DEBUG "NWFPE: %s[%d] takes exception %08x at %p from %08x\n",
-	 current->comm, current->pid, flags,
-	 __builtin_return_address(0), GET_USERREG()[15]);
-#endif
-
-  /* Keep SoftFloat exception flags up to date.  */
-  float_exception_flags |= flags;
-
-  /* Read fpsr and initialize the cumulativeTraps.  */
-  fpsr = readFPSR();
-  cumulativeTraps = 0;
-  
-  /* For each type of exception, the cumulative trap exception bit is only
-     set if the corresponding trap enable bit is not set.  */
-  if ((!(fpsr & BIT_IXE)) && (flags & BIT_IXC))
-     cumulativeTraps |= BIT_IXC;  
-  if ((!(fpsr & BIT_UFE)) && (flags & BIT_UFC))
-     cumulativeTraps |= BIT_UFC;  
-  if ((!(fpsr & BIT_OFE)) && (flags & BIT_OFC))
-     cumulativeTraps |= BIT_OFC;  
-  if ((!(fpsr & BIT_DZE)) && (flags & BIT_DZC))
-     cumulativeTraps |= BIT_DZC;  
-  if ((!(fpsr & BIT_IOE)) && (flags & BIT_IOC))
-     cumulativeTraps |= BIT_IOC;  
-
-  /* Set the cumulative exceptions flags.  */
-  if (cumulativeTraps)
-    writeFPSR(fpsr | cumulativeTraps);
-
-  /* Raise an exception if necessary.  */
-  if (fpsr & (flags << 16))
-    fp_send_sig(SIGFPE, current, 1);
+	printk(KERN_DEBUG
+	       "NWFPE: %s[%d] takes exception %08x at %p from %08x\n",
+	       current->comm, current->pid, flags,
+	       __builtin_return_address(0), GET_USERREG()[15]);
+#endif
+
+	/* Keep SoftFloat exception flags up to date.  */
+	float_exception_flags |= flags;
+
+	/* Read fpsr and initialize the cumulativeTraps.  */
+	fpsr = readFPSR();
+	cumulativeTraps = 0;
+
+	/* For each type of exception, the cumulative trap exception bit is only
+	   set if the corresponding trap enable bit is not set.  */
+	if ((!(fpsr & BIT_IXE)) && (flags & BIT_IXC))
+		cumulativeTraps |= BIT_IXC;
+	if ((!(fpsr & BIT_UFE)) && (flags & BIT_UFC))
+		cumulativeTraps |= BIT_UFC;
+	if ((!(fpsr & BIT_OFE)) && (flags & BIT_OFC))
+		cumulativeTraps |= BIT_OFC;
+	if ((!(fpsr & BIT_DZE)) && (flags & BIT_DZC))
+		cumulativeTraps |= BIT_DZC;
+	if ((!(fpsr & BIT_IOE)) && (flags & BIT_IOC))
+		cumulativeTraps |= BIT_IOC;
+
+	/* Set the cumulative exceptions flags.  */
+	if (cumulativeTraps)
+		writeFPSR(fpsr | cumulativeTraps);
+
+	/* Raise an exception if necessary.  */
+	if (fpsr & (flags << 16))
+		fp_send_sig(SIGFPE, current, 1);
 }
 
 module_init(fpe_init);