[PATCH 3/7] microblaze: Use libgcc files from lib/

[Palmer Dabbelt]

These files are functionally identical to the shared copies that I
recently added.

Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
 arch/microblaze/Kconfig       |  6 +++++
 arch/microblaze/lib/Makefile  |  3 +--
 arch/microblaze/lib/ashldi3.c | 28 ---------------------
 arch/microblaze/lib/ashrdi3.c | 30 -----------------------
 arch/microblaze/lib/cmpdi2.c  | 26 --------------------
 arch/microblaze/lib/libgcc.h  | 32 ------------------------
 arch/microblaze/lib/lshrdi3.c | 28 ---------------------
 arch/microblaze/lib/muldi3.c  | 57 -------------------------------------------
 arch/microblaze/lib/ucmpdi2.c | 20 ---------------
 9 files changed, 7 insertions(+), 223 deletions(-)
 delete mode 100644 arch/microblaze/lib/ashldi3.c
 delete mode 100644 arch/microblaze/lib/ashrdi3.c
 delete mode 100644 arch/microblaze/lib/cmpdi2.c
 delete mode 100644 arch/microblaze/lib/libgcc.h
 delete mode 100644 arch/microblaze/lib/lshrdi3.c
 delete mode 100644 arch/microblaze/lib/muldi3.c
 delete mode 100644 arch/microblaze/lib/ucmpdi2.c

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 85885a501dce..833487c17996 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -34,6 +34,12 @@ config MICROBLAZE
 	select TRACING_SUPPORT
 	select VIRT_TO_BUS
 	select CPU_NO_EFFICIENT_FFS
+	select GENERIC_ASHLDI3
+	select GENERIC_ASHRDI3
+	select GENERIC_CMPDI2
+	select GENERIC_LSHRDI3
+	select GENERIC_MULDI3
+	select GENERIC_UCMPDI3
 
 config SWAP
 	def_bool n
diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile
index 70c7ae6a3fb5..c9a4d537e2fd 100644
--- a/arch/microblaze/lib/Makefile
+++ b/arch/microblaze/lib/Makefile
@@ -19,5 +19,4 @@ endif
 lib-y += uaccess_old.o
 
 # libgcc-style stuff needed in the kernel
-obj-y += ashldi3.o ashrdi3.o cmpdi2.o divsi3.o lshrdi3.o modsi3.o
-obj-y += muldi3.o mulsi3.o ucmpdi2.o udivsi3.o umodsi3.o
+obj-y += divsi3.o modsi3.o mulsi3.o udivsi3.o umodsi3.o
diff --git a/arch/microblaze/lib/ashldi3.c b/arch/microblaze/lib/ashldi3.c
deleted file mode 100644
index 1af904cd972d..000000000000
--- a/arch/microblaze/lib/ashldi3.c
+++ /dev/null
@@ -1,28 +0,0 @@
-#include <linux/export.h>
-
-#include "libgcc.h"
-
-long long __ashldi3(long long u, word_type b)
-{
-	DWunion uu, w;
-	word_type bm;
-
-	if (b == 0)
-		return u;
-
-	uu.ll = u;
-	bm = 32 - b;
-
-	if (bm <= 0) {
-		w.s.low = 0;
-		w.s.high = (unsigned int) uu.s.low << -bm;
-	} else {
-		const unsigned int carries = (unsigned int) uu.s.low >> bm;
-
-		w.s.low = (unsigned int) uu.s.low << b;
-		w.s.high = ((unsigned int) uu.s.high << b) | carries;
-	}
-
-	return w.ll;
-}
-EXPORT_SYMBOL(__ashldi3);
diff --git a/arch/microblaze/lib/ashrdi3.c b/arch/microblaze/lib/ashrdi3.c
deleted file mode 100644
index 32c334c05d04..000000000000
--- a/arch/microblaze/lib/ashrdi3.c
+++ /dev/null
@@ -1,30 +0,0 @@
-#include <linux/export.h>
-
-#include "libgcc.h"
-
-long long __ashrdi3(long long u, word_type b)
-{
-	DWunion uu, w;
-	word_type bm;
-
-	if (b == 0)
-		return u;
-
-	uu.ll = u;
-	bm = 32 - b;
-
-	if (bm <= 0) {
-		/* w.s.high = 1..1 or 0..0 */
-		w.s.high =
-		    uu.s.high >> 31;
-		w.s.low = uu.s.high >> -bm;
-	} else {
-		const unsigned int carries = (unsigned int) uu.s.high << bm;
-
-		w.s.high = uu.s.high >> b;
-		w.s.low = ((unsigned int) uu.s.low >> b) | carries;
-	}
-
-	return w.ll;
-}
-EXPORT_SYMBOL(__ashrdi3);
diff --git a/arch/microblaze/lib/cmpdi2.c b/arch/microblaze/lib/cmpdi2.c
deleted file mode 100644
index 67abc9ac1bd4..000000000000
--- a/arch/microblaze/lib/cmpdi2.c
+++ /dev/null
@@ -1,26 +0,0 @@
-#include <linux/export.h>
-
-#include "libgcc.h"
-
-word_type __cmpdi2(long long a, long long b)
-{
-	const DWunion au = {
-		.ll = a
-	};
-	const DWunion bu = {
-		.ll = b
-	};
-
-	if (au.s.high < bu.s.high)
-		return 0;
-	else if (au.s.high > bu.s.high)
-		return 2;
-
-	if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
-		return 0;
-	else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
-		return 2;
-
-	return 1;
-}
-EXPORT_SYMBOL(__cmpdi2);
diff --git a/arch/microblaze/lib/libgcc.h b/arch/microblaze/lib/libgcc.h
deleted file mode 100644
index ab077ef7e14b..000000000000
--- a/arch/microblaze/lib/libgcc.h
+++ /dev/null
@@ -1,32 +0,0 @@
-#ifndef __ASM_LIBGCC_H
-#define __ASM_LIBGCC_H
-
-#include <asm/byteorder.h>
-
-typedef int word_type __attribute__ ((mode (__word__)));
-
-#ifdef __BIG_ENDIAN
-struct DWstruct {
-	int high, low;
-};
-#elif defined(__LITTLE_ENDIAN)
-struct DWstruct {
-	int low, high;
-};
-#else
-#error I feel sick.
-#endif
-
-typedef union {
-	struct DWstruct s;
-	long long ll;
-} DWunion;
-
-extern long long __ashldi3(long long u, word_type b);
-extern long long __ashrdi3(long long u, word_type b);
-extern word_type __cmpdi2(long long a, long long b);
-extern long long __lshrdi3(long long u, word_type b);
-extern long long __muldi3(long long u, long long v);
-extern word_type __ucmpdi2(unsigned long long a, unsigned long long b);
-
-#endif /* __ASM_LIBGCC_H */
diff --git a/arch/microblaze/lib/lshrdi3.c b/arch/microblaze/lib/lshrdi3.c
deleted file mode 100644
index adcb253f11c8..000000000000
--- a/arch/microblaze/lib/lshrdi3.c
+++ /dev/null
@@ -1,28 +0,0 @@
-#include <linux/export.h>
-
-#include "libgcc.h"
-
-long long __lshrdi3(long long u, word_type b)
-{
-	DWunion uu, w;
-	word_type bm;
-
-	if (b == 0)
-		return u;
-
-	uu.ll = u;
-	bm = 32 - b;
-
-	if (bm <= 0) {
-		w.s.high = 0;
-		w.s.low = (unsigned int) uu.s.high >> -bm;
-	} else {
-		const unsigned int carries = (unsigned int) uu.s.high << bm;
-
-		w.s.high = (unsigned int) uu.s.high >> b;
-		w.s.low = ((unsigned int) uu.s.low >> b) | carries;
-	}
-
-	return w.ll;
-}
-EXPORT_SYMBOL(__lshrdi3);
diff --git a/arch/microblaze/lib/muldi3.c b/arch/microblaze/lib/muldi3.c
deleted file mode 100644
index a3f9a03acdcd..000000000000
--- a/arch/microblaze/lib/muldi3.c
+++ /dev/null
@@ -1,57 +0,0 @@
-#include <linux/export.h>
-
-#include "libgcc.h"
-
-#define W_TYPE_SIZE 32
-
-#define __ll_B ((unsigned long) 1 << (W_TYPE_SIZE / 2))
-#define __ll_lowpart(t) ((unsigned long) (t) & (__ll_B - 1))
-#define __ll_highpart(t) ((unsigned long) (t) >> (W_TYPE_SIZE / 2))
-
-/* If we still don't have umul_ppmm, define it using plain C.  */
-#if !defined(umul_ppmm)
-#define umul_ppmm(w1, w0, u, v)						\
-	do {								\
-		unsigned long __x0, __x1, __x2, __x3;			\
-		unsigned short __ul, __vl, __uh, __vh;			\
-									\
-		__ul = __ll_lowpart(u);					\
-		__uh = __ll_highpart(u);				\
-		__vl = __ll_lowpart(v);					\
-		__vh = __ll_highpart(v);				\
-									\
-		__x0 = (unsigned long) __ul * __vl;			\
-		__x1 = (unsigned long) __ul * __vh;			\
-		__x2 = (unsigned long) __uh * __vl;			\
-		__x3 = (unsigned long) __uh * __vh;			\
-									\
-		__x1 += __ll_highpart(__x0); /* this can't give carry */\
-		__x1 += __x2; /* but this indeed can */			\
-		if (__x1 < __x2) /* did we get it? */			\
-		__x3 += __ll_B; /* yes, add it in the proper pos */	\
-									\
-		(w1) = __x3 + __ll_highpart(__x1);			\
-		(w0) = __ll_lowpart(__x1) * __ll_B + __ll_lowpart(__x0);\
-	} while (0)
-#endif
-
-#if !defined(__umulsidi3)
-#define __umulsidi3(u, v) ({				\
-	DWunion __w;					\
-	umul_ppmm(__w.s.high, __w.s.low, u, v);		\
-	__w.ll;						\
-	})
-#endif
-
-long long __muldi3(long long u, long long v)
-{
-	const DWunion uu = {.ll = u};
-	const DWunion vv = {.ll = v};
-	DWunion w = {.ll = __umulsidi3(uu.s.low, vv.s.low)};
-
-	w.s.high += ((unsigned long) uu.s.low * (unsigned long) vv.s.high
-		+ (unsigned long) uu.s.high * (unsigned long) vv.s.low);
-
-	return w.ll;
-}
-EXPORT_SYMBOL(__muldi3);
diff --git a/arch/microblaze/lib/ucmpdi2.c b/arch/microblaze/lib/ucmpdi2.c
deleted file mode 100644
index d05f1585121c..000000000000
--- a/arch/microblaze/lib/ucmpdi2.c
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <linux/export.h>
-
-#include "libgcc.h"
-
-word_type __ucmpdi2(unsigned long long a, unsigned long long b)
-{
-	const DWunion au = {.ll = a};
-	const DWunion bu = {.ll = b};
-
-	if ((unsigned int) au.s.high < (unsigned int) bu.s.high)
-		return 0;
-	else if ((unsigned int) au.s.high > (unsigned int) bu.s.high)
-		return 2;
-	if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
-		return 0;
-	else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
-		return 2;
-	return 1;
-}
-EXPORT_SYMBOL(__ucmpdi2);
-- 
2.13.0