sh: __udivdi3 -> do_div() in softfloat lib.

Inhibit the generation of __udivdi3 for the softfloat lib, use do_div()
outright.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 41 insertions, 32 deletions

diff --git a/arch/sh/kernel/cpu/sh4/softfloat.c b/arch/sh/kernel/cpu/sh4/softfloat.c
index 2b747f3..42edf2e 100644
--- a/arch/sh/kernel/cpu/sh4/softfloat.c
+++ b/arch/sh/kernel/cpu/sh4/softfloat.c
@@ -37,6 +37,7 @@
  */
 #include <linux/kernel.h>
 #include <cpu/fpu.h>
+#include <asm/div64.h>
 
 #define LIT64( a ) a##LL
 
@@ -67,16 +68,16 @@ typedef unsigned long long float64;
 extern void float_raise(unsigned int flags);	/* in fpu.c */
 extern int float_rounding_mode(void);	/* in fpu.c */
 
-inline bits64 extractFloat64Frac(float64 a);
-inline flag extractFloat64Sign(float64 a);
-inline int16 extractFloat64Exp(float64 a);
-inline int16 extractFloat32Exp(float32 a);
-inline flag extractFloat32Sign(float32 a);
-inline bits32 extractFloat32Frac(float32 a);
-inline float64 packFloat64(flag zSign, int16 zExp, bits64 zSig);
-inline void shift64RightJamming(bits64 a, int16 count, bits64 * zPtr);
-inline float32 packFloat32(flag zSign, int16 zExp, bits32 zSig);
-inline void shift32RightJamming(bits32 a, int16 count, bits32 * zPtr);
+bits64 extractFloat64Frac(float64 a);
+flag extractFloat64Sign(float64 a);
+int16 extractFloat64Exp(float64 a);
+int16 extractFloat32Exp(float32 a);
+flag extractFloat32Sign(float32 a);
+bits32 extractFloat32Frac(float32 a);
+float64 packFloat64(flag zSign, int16 zExp, bits64 zSig);
+void shift64RightJamming(bits64 a, int16 count, bits64 * zPtr);
+float32 packFloat32(flag zSign, int16 zExp, bits32 zSig);
+void shift32RightJamming(bits32 a, int16 count, bits32 * zPtr);
 float64 float64_sub(float64 a, float64 b);
 float32 float32_sub(float32 a, float32 b);
 float32 float32_add(float32 a, float32 b);
@@ -86,11 +87,11 @@ float32 float32_div(float32 a, float32 b);
 float32 float32_mul(float32 a, float32 b);
 float64 float64_mul(float64 a, float64 b);
 float32 float64_to_float32(float64 a);
-inline void add128(bits64 a0, bits64 a1, bits64 b0, bits64 b1, bits64 * z0Ptr,
+void add128(bits64 a0, bits64 a1, bits64 b0, bits64 b1, bits64 * z0Ptr,
 		   bits64 * z1Ptr);
-inline void sub128(bits64 a0, bits64 a1, bits64 b0, bits64 b1, bits64 * z0Ptr,
+void sub128(bits64 a0, bits64 a1, bits64 b0, bits64 b1, bits64 * z0Ptr,
 		   bits64 * z1Ptr);
-inline void mul64To128(bits64 a, bits64 b, bits64 * z0Ptr, bits64 * z1Ptr);
+void mul64To128(bits64 a, bits64 b, bits64 * z0Ptr, bits64 * z1Ptr);
 
 static int8 countLeadingZeros32(bits32 a);
 static int8 countLeadingZeros64(bits64 a);
@@ -110,42 +111,42 @@ static bits64 estimateDiv128To64(bits64 a0, bits64 a1, bits64 b);
 static void normalizeFloat32Subnormal(bits32 aSig, int16 * zExpPtr,
 				      bits32 * zSigPtr);
 
-inline bits64 extractFloat64Frac(float64 a)
+bits64 extractFloat64Frac(float64 a)
 {
 	return a & LIT64(0x000FFFFFFFFFFFFF);
 }
 
-inline flag extractFloat64Sign(float64 a)
+flag extractFloat64Sign(float64 a)
 {
 	return a >> 63;
 }
 
-inline int16 extractFloat64Exp(float64 a)
+int16 extractFloat64Exp(float64 a)
 {
 	return (a >> 52) & 0x7FF;
 }
 
-inline int16 extractFloat32Exp(float32 a)
+int16 extractFloat32Exp(float32 a)
 {
 	return (a >> 23) & 0xFF;
 }
 
-inline flag extractFloat32Sign(float32 a)
+flag extractFloat32Sign(float32 a)
 {
 	return a >> 31;
 }
 
-inline bits32 extractFloat32Frac(float32 a)
+bits32 extractFloat32Frac(float32 a)
 {
 	return a & 0x007FFFFF;
 }
 
-inline float64 packFloat64(flag zSign, int16 zExp, bits64 zSig)
+float64 packFloat64(flag zSign, int16 zExp, bits64 zSig)
 {
 	return (((bits64) zSign) << 63) + (((bits64) zExp) << 52) + zSig;
 }
 
-inline void shift64RightJamming(bits64 a, int16 count, bits64 * zPtr)
+void shift64RightJamming(bits64 a, int16 count, bits64 * zPtr)
 {
 	bits64 z;
 
@@ -338,12 +339,12 @@ static float64 addFloat64Sigs(float64 a, float64 b, flag zSign)
 
 }
 
-inline float32 packFloat32(flag zSign, int16 zExp, bits32 zSig)
+float32 packFloat32(flag zSign, int16 zExp, bits32 zSig)
 {
 	return (((bits32) zSign) << 31) + (((bits32) zExp) << 23) + zSig;
 }
 
-inline void shift32RightJamming(bits32 a, int16 count, bits32 * zPtr)
+void shift32RightJamming(bits32 a, int16 count, bits32 * zPtr)
 {
 	bits32 z;
 	if (count == 0) {
@@ -634,7 +635,7 @@ normalizeFloat64Subnormal(bits64 aSig, int16 * zExpPtr, bits64 * zSigPtr)
 	*zExpPtr = 1 - shiftCount;
 }
 
-inline void add128(bits64 a0, bits64 a1, bits64 b0, bits64 b1, bits64 * z0Ptr,
+void add128(bits64 a0, bits64 a1, bits64 b0, bits64 b1, bits64 * z0Ptr,
 		   bits64 * z1Ptr)
 {
 	bits64 z1;
@@ -644,7 +645,7 @@ inline void add128(bits64 a0, bits64 a1, bits64 b0, bits64 b1, bits64 * z0Ptr,
 	*z0Ptr = a0 + b0 + (z1 < a1);
 }
 
-inline void
+void
 sub128(bits64 a0, bits64 a1, bits64 b0, bits64 b1, bits64 * z0Ptr,
        bits64 * z1Ptr)
 {
@@ -656,11 +657,14 @@ static bits64 estimateDiv128To64(bits64 a0, bits64 a1, bits64 b)
 {
 	bits64 b0, b1;
 	bits64 rem0, rem1, term0, term1;
-	bits64 z;
+	bits64 z, tmp;
 	if (b <= a0)
 		return LIT64(0xFFFFFFFFFFFFFFFF);
 	b0 = b >> 32;
-	z = (b0 << 32 <= a0) ? LIT64(0xFFFFFFFF00000000) : (a0 / b0) << 32;
+	tmp = a0;
+	do_div(tmp, b0);
+
+	z = (b0 << 32 <= a0) ? LIT64(0xFFFFFFFF00000000) : tmp << 32;
 	mul64To128(b, z, &term0, &term1);
 	sub128(a0, a1, term0, term1, &rem0, &rem1);
 	while (((sbits64) rem0) < 0) {
@@ -669,11 +673,13 @@ static bits64 estimateDiv128To64(bits64 a0, bits64 a1, bits64 b)
 		add128(rem0, rem1, b0, b1, &rem0, &rem1);
 	}
 	rem0 = (rem0 << 32) | (rem1 >> 32);
-	z |= (b0 << 32 <= rem0) ? 0xFFFFFFFF : rem0 / b0;
+	tmp = rem0;
+	do_div(tmp, b0);
+	z |= (b0 << 32 <= rem0) ? 0xFFFFFFFF : tmp;
 	return z;
 }
 
-inline void mul64To128(bits64 a, bits64 b, bits64 * z0Ptr, bits64 * z1Ptr)
+void mul64To128(bits64 a, bits64 b, bits64 * z0Ptr, bits64 * z1Ptr)
 {
 	bits32 aHigh, aLow, bHigh, bLow;
 	bits64 z0, zMiddleA, zMiddleB, z1;
@@ -769,7 +775,8 @@ float32 float32_div(float32 a, float32 b)
 {
 	flag aSign, bSign, zSign;
 	int16 aExp, bExp, zExp;
-	bits32 aSig, bSig, zSig;
+	bits32 aSig, bSig;
+	uint64_t zSig;
 
 	aSig = extractFloat32Frac(a);
 	aExp = extractFloat32Exp(a);
@@ -804,11 +811,13 @@ float32 float32_div(float32 a, float32 b)
 		aSig >>= 1;
 		++zExp;
 	}
-	zSig = (((bits64) aSig) << 32) / bSig;
+	zSig = (((bits64) aSig) << 32);
+	do_div(zSig, bSig);
+
 	if ((zSig & 0x3F) == 0) {
 		zSig |= (((bits64) bSig) * zSig != ((bits64) aSig) << 32);
 	}
-	return roundAndPackFloat32(zSign, zExp, zSig);
+	return roundAndPackFloat32(zSign, zExp, (bits32)zSig);
 
 }