X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=arch%2Fx86%2Fmath-emu%2Freg_mul.c;h=36c37f71f713b69537387c658303ca579e456730;hb=4884d8e6a05026ec906355436cea9dc1acb1d09e;hp=40f50b61bc674dc3d0028ea19c4694c48e1bc634;hpb=347c53dca73fca317d57781f510f5ff4f6c0d0d7;p=linux-2.6-omap-h63xx.git

diff --git a/arch/x86/math-emu/reg_mul.c b/arch/x86/math-emu/reg_mul.c
index 40f50b61bc6..36c37f71f71 100644
--- a/arch/x86/math-emu/reg_mul.c
+++ b/arch/x86/math-emu/reg_mul.c
@@ -20,7 +20,6 @@
 #include "reg_constant.h"
 #include "fpu_system.h"
 
-
 /*
   Multiply two registers to give a register result.
   The sources are st(deststnr) and (b,tagb,signb).
@@ -29,104 +28,88 @@
 /* This routine must be called with non-empty source registers */
 int FPU_mul(FPU_REG const *b, u_char tagb, int deststnr, int control_w)
 {
-  FPU_REG *a = &st(deststnr);
-  FPU_REG *dest = a;
-  u_char taga = FPU_gettagi(deststnr);
-  u_char saved_sign = getsign(dest);
-  u_char sign = (getsign(a) ^ getsign(b));
-  int tag;
-
+	FPU_REG *a = &st(deststnr);
+	FPU_REG *dest = a;
+	u_char taga = FPU_gettagi(deststnr);
+	u_char saved_sign = getsign(dest);
+	u_char sign = (getsign(a) ^ getsign(b));
+	int tag;
 
-  if ( !(taga | tagb) )
-    {
-      /* Both regs Valid, this should be the most common case. */
+	if (!(taga | tagb)) {
+		/* Both regs Valid, this should be the most common case. */
 
-      tag = FPU_u_mul(a, b, dest, control_w, sign, exponent(a) + exponent(b));
-      if ( tag < 0 )
-	{
-	  setsign(dest, saved_sign);
-	  return tag;
+		tag =
+		    FPU_u_mul(a, b, dest, control_w, sign,
+			      exponent(a) + exponent(b));
+		if (tag < 0) {
+			setsign(dest, saved_sign);
+			return tag;
+		}
+		FPU_settagi(deststnr, tag);
+		return tag;
 	}
-      FPU_settagi(deststnr, tag);
-      return tag;
-    }
 
-  if ( taga == TAG_Special )
-    taga = FPU_Special(a);
-  if ( tagb == TAG_Special )
-    tagb = FPU_Special(b);
+	if (taga == TAG_Special)
+		taga = FPU_Special(a);
+	if (tagb == TAG_Special)
+		tagb = FPU_Special(b);
 
-  if ( ((taga == TAG_Valid) && (tagb == TW_Denormal))
+	if (((taga == TAG_Valid) && (tagb == TW_Denormal))
 	    || ((taga == TW_Denormal) && (tagb == TAG_Valid))
-	    || ((taga == TW_Denormal) && (tagb == TW_Denormal)) )
-    {
-      FPU_REG x, y;
-      if ( denormal_operand() < 0 )
-	return FPU_Exception;
-
-      FPU_to_exp16(a, &x);
-      FPU_to_exp16(b, &y);
-      tag = FPU_u_mul(&x, &y, dest, control_w, sign,
-		      exponent16(&x) + exponent16(&y));
-      if ( tag < 0 )
-	{
-	  setsign(dest, saved_sign);
-	  return tag;
-	}
-      FPU_settagi(deststnr, tag);
-      return tag;
-    }
-  else if ( (taga <= TW_Denormal) && (tagb <= TW_Denormal) )
-    {
-      if ( ((tagb == TW_Denormal) || (taga == TW_Denormal))
-	   && (denormal_operand() < 0) )
-	return FPU_Exception;
+	    || ((taga == TW_Denormal) && (tagb == TW_Denormal))) {
+		FPU_REG x, y;
+		if (denormal_operand() < 0)
+			return FPU_Exception;
 
-      /* Must have either both arguments == zero, or
-	 one valid and the other zero.
-	 The result is therefore zero. */
-      FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
-      /* The 80486 book says that the answer is +0, but a real
-	 80486 behaves this way.
-	 IEEE-754 apparently says it should be this way. */
-      setsign(dest, sign);
-      return TAG_Zero;
-    }
-      /* Must have infinities, NaNs, etc */
-  else if ( (taga == TW_NaN) || (tagb == TW_NaN) )
-    {
-      return real_2op_NaN(b, tagb, deststnr, &st(0));
-    }
-  else if ( ((taga == TW_Infinity) && (tagb == TAG_Zero))
-	    || ((tagb == TW_Infinity) && (taga == TAG_Zero)) )
-    {
-      return arith_invalid(deststnr);  /* Zero*Infinity is invalid */
-    }
-  else if ( ((taga == TW_Denormal) || (tagb == TW_Denormal))
-	    && (denormal_operand() < 0) )
-    {
-      return FPU_Exception;
-    }
-  else if (taga == TW_Infinity)
-    {
-      FPU_copy_to_regi(a, TAG_Special, deststnr);
-      setsign(dest, sign);
-      return TAG_Special;
-    }
-  else if (tagb == TW_Infinity)
-    {
-      FPU_copy_to_regi(b, TAG_Special, deststnr);
-      setsign(dest, sign);
-      return TAG_Special;
-    }
+		FPU_to_exp16(a, &x);
+		FPU_to_exp16(b, &y);
+		tag = FPU_u_mul(&x, &y, dest, control_w, sign,
+				exponent16(&x) + exponent16(&y));
+		if (tag < 0) {
+			setsign(dest, saved_sign);
+			return tag;
+		}
+		FPU_settagi(deststnr, tag);
+		return tag;
+	} else if ((taga <= TW_Denormal) && (tagb <= TW_Denormal)) {
+		if (((tagb == TW_Denormal) || (taga == TW_Denormal))
+		    && (denormal_operand() < 0))
+			return FPU_Exception;
 
+		/* Must have either both arguments == zero, or
+		   one valid and the other zero.
+		   The result is therefore zero. */
+		FPU_copy_to_regi(&CONST_Z, TAG_Zero, deststnr);
+		/* The 80486 book says that the answer is +0, but a real
+		   80486 behaves this way.
+		   IEEE-754 apparently says it should be this way. */
+		setsign(dest, sign);
+		return TAG_Zero;
+	}
+	/* Must have infinities, NaNs, etc */
+	else if ((taga == TW_NaN) || (tagb == TW_NaN)) {
+		return real_2op_NaN(b, tagb, deststnr, &st(0));
+	} else if (((taga == TW_Infinity) && (tagb == TAG_Zero))
+		   || ((tagb == TW_Infinity) && (taga == TAG_Zero))) {
+		return arith_invalid(deststnr);	/* Zero*Infinity is invalid */
+	} else if (((taga == TW_Denormal) || (tagb == TW_Denormal))
+		   && (denormal_operand() < 0)) {
+		return FPU_Exception;
+	} else if (taga == TW_Infinity) {
+		FPU_copy_to_regi(a, TAG_Special, deststnr);
+		setsign(dest, sign);
+		return TAG_Special;
+	} else if (tagb == TW_Infinity) {
+		FPU_copy_to_regi(b, TAG_Special, deststnr);
+		setsign(dest, sign);
+		return TAG_Special;
+	}
 #ifdef PARANOID
-  else
-    {
-      EXCEPTION(EX_INTERNAL|0x102);
-      return FPU_Exception;
-    }
-#endif /* PARANOID */ 
+	else {
+		EXCEPTION(EX_INTERNAL | 0x102);
+		return FPU_Exception;
+	}
+#endif /* PARANOID */
 
 	return 0;
 }