[PATCH] x86 math-emu update

From 2.4, mostly just things like quietening compiler warnings.

arch/i386/math-emu/fpu_system.h

@@ -20,6 +20,8 @@
    of the stack frame of math_emulate() */
 #define SETUP_DATA_AREA(arg)	FPU_info = (struct info *) &arg
 
+/* s is always from a cpu register, and the cpu does bounds checking
+ * during register load --> no further bounds checks needed */
 #define LDT_DESCRIPTOR(s)	(((struct desc_struct *)current->mm->context.ldt)[(s) >> 3])
 #define SEG_D_SIZE(x)		((x).b & (3 << 21))
 #define SEG_G_BIT(x)		((x).b & (1 << 23))

arch/i386/math-emu/reg_add_sub.c

@@ -140,7 +140,7 @@ int FPU_sub(int flags, int rm, int control_w)
   FPU_REG const *a, *b;
   FPU_REG *dest;
   u_char taga, tagb, signa, signb, saved_sign, sign;
-  int diff, tag, expa, expb, deststnr;
+  int diff, tag = 0, expa, expb, deststnr;
 
   a = &st(0);
   taga = FPU_gettag0();

arch/i386/math-emu/reg_compare.c

@@ -174,7 +174,7 @@ static int compare(FPU_REG const *b, int tagb)
 /* This function requires that st(0) is not empty */
 int FPU_compare_st_data(FPU_REG const *loaded_data, u_char loaded_tag)
 {
-  int f, c;
+  int f = 0, c;
 
   c = compare(loaded_data, loaded_tag);
 
@@ -216,7 +216,7 @@ int FPU_compare_st_data(FPU_REG const *loaded_data, u_char loaded_tag)
 
 static int compare_st_st(int nr)
 {
-  int f, c;
+  int f = 0, c;
   FPU_REG *st_ptr;
 
   if ( !NOT_EMPTY(0) || !NOT_EMPTY(nr) )
@@ -268,7 +268,7 @@ static int compare_st_st(int nr)
 
 static int compare_u_st_st(int nr)
 {
-  int f, c;
+  int f = 0, c;
   FPU_REG *st_ptr;
 
   if ( !NOT_EMPTY(0) || !NOT_EMPTY(nr) )

arch/i386/math-emu/reg_divide.c

@@ -203,4 +203,5 @@ int FPU_div(int flags, int rm, int control_w)
     }
 #endif /* PARANOID */ 
 
+	return 0;
 }

arch/i386/math-emu/reg_ld_str.c

@@ -632,7 +632,7 @@ int FPU_store_double(FPU_REG *st0_ptr, u_char st0_tag, double *dfloat)
 /* Put a float into user memory */
 int FPU_store_single(FPU_REG *st0_ptr, u_char st0_tag, float *single)
 {
-  long templ;
+  long templ = 0;
   unsigned long increment = 0;     	/* avoid gcc warnings */
   int precision_loss;
   int exp;

arch/i386/math-emu/reg_mul.c

@@ -128,4 +128,5 @@ int FPU_mul(FPU_REG const *b, u_char tagb, int deststnr, int control_w)
     }
 #endif /* PARANOID */ 
 
+	return 0;
 }

include/math-emu/op-1.h

@@ -25,7 +25,7 @@
 #ifndef    __MATH_EMU_OP_1_H__
 #define    __MATH_EMU_OP_1_H__
 
-#define _FP_FRAC_DECL_1(X)	_FP_W_TYPE X##_f
+#define _FP_FRAC_DECL_1(X)	_FP_W_TYPE X##_f=0
 #define _FP_FRAC_COPY_1(D,S)	(D##_f = S##_f)
 #define _FP_FRAC_SET_1(X,I)	(X##_f = I)
 #define _FP_FRAC_HIGH_1(X)	(X##_f)

include/math-emu/soft-fp.h

@@ -154,11 +154,11 @@ do {						\
 
 #define _FP_CLS_COMBINE(x,y)	(((x) << 2) | (y))
 
-#include "op-1.h"
-#include "op-2.h"
-#include "op-4.h"
-#include "op-8.h"
-#include "op-common.h"
+#include <math-emu/op-1.h>
+#include <math-emu/op-2.h>
+#include <math-emu/op-4.h>
+#include <math-emu/op-8.h>
+#include <math-emu/op-common.h>
 
 /* Sigh.  Silly things longlong.h needs.  */
 #define UWtype		_FP_W_TYPE