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Commit 4e07dba7 authored by Michal Simek's avatar Michal Simek
Browse files

microblaze: Add libgcc function directly to kernel 



Replaced libgcc functions with asm optimized implementation.

Signed-off-by: default avatarMichal Simek <monstr@monstr.eu>
parent cec05167

arch/microblaze/Makefile

+0 −3
Original line number Diff line number Diff line
@@ -42,11 +42,8 @@ KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-1) $(CPUFLAGS-2) 
LDFLAGS		:=

LDFLAGS_vmlinux	:=



LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)



head-y := arch/microblaze/kernel/head.o

libs-y += arch/microblaze/lib/

libs-y += $(LIBGCC)

core-y += arch/microblaze/kernel/

core-y += arch/microblaze/mm/

core-y += arch/microblaze/platform/

arch/microblaze/kernel/microblaze_ksyms.c

+0 −25
Original line number Diff line number Diff line
@@ -21,31 +21,6 @@ 
#include <linux/ftrace.h>

#include <linux/uaccess.h>



/*

 * libgcc functions - functions that are used internally by the

 * compiler... (prototypes are not correct though, but that

 * doesn't really matter since they're not versioned).

 */

extern void __ashldi3(void);

EXPORT_SYMBOL(__ashldi3);

extern void __ashrdi3(void);

EXPORT_SYMBOL(__ashrdi3);

extern void __divsi3(void);

EXPORT_SYMBOL(__divsi3);

extern void __lshrdi3(void);

EXPORT_SYMBOL(__lshrdi3);

extern void __modsi3(void);

EXPORT_SYMBOL(__modsi3);

extern void __mulsi3(void);

EXPORT_SYMBOL(__mulsi3);

extern void __muldi3(void);

EXPORT_SYMBOL(__muldi3);

extern void __ucmpdi2(void);

EXPORT_SYMBOL(__ucmpdi2);

extern void __udivsi3(void);

EXPORT_SYMBOL(__udivsi3);

extern void __umodsi3(void);

EXPORT_SYMBOL(__umodsi3);

extern char *_ebss;

EXPORT_SYMBOL_GPL(_ebss);

#ifdef CONFIG_FUNCTION_TRACER

arch/microblaze/lib/Makefile

+10 −0
Original line number Diff line number Diff line
@@ -11,3 +11,13 @@ lib-y += memcpy.o memmove.o 
endif



lib-y += uaccess_old.o



lib-y += ashldi3.o

lib-y += ashrdi3.o

lib-y += divsi3.o

lib-y += lshrdi3.o

lib-y += modsi3.o

lib-y += muldi3.o

lib-y += mulsi3.o

lib-y += udivsi3.o

lib-y += umodsi3.o

arch/microblaze/lib/ashldi3.c

0 → 100644
+29 −0
Original line number Diff line number Diff line 
#include <linux/module.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);

arch/microblaze/lib/ashrdi3.c

0 → 100644
+31 −0
Original line number Diff line number Diff line 
#include <linux/module.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);