i386: prepare shared lib/mmx.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 403 deletions

diff --git a/arch/i386/lib/mmx.c b/arch/i386/lib/mmx.c
deleted file mode 100644
index 28084d2e8dd..00000000000
--- a/arch/i386/lib/mmx.c
+++ /dev/null
@@ -1,403 +0,0 @@
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/sched.h>
-#include <linux/hardirq.h>
-#include <linux/module.h>
-
-#include <asm/i387.h>
-
-
-/*
- *	MMX 3DNow! library helper functions
- *
- *	To do:
- *	We can use MMX just for prefetch in IRQ's. This may be a win. 
- *		(reported so on K6-III)
- *	We should use a better code neutral filler for the short jump
- *		leal ebx. [ebx] is apparently best for K6-2, but Cyrix ??
- *	We also want to clobber the filler register so we don't get any
- *		register forwarding stalls on the filler. 
- *
- *	Add *user handling. Checksums are not a win with MMX on any CPU
- *	tested so far for any MMX solution figured.
- *
- *	22/09/2000 - Arjan van de Ven 
- *		Improved for non-egineering-sample Athlons 
- *
- */
- 
-void *_mmx_memcpy(void *to, const void *from, size_t len)
-{
-	void *p;
-	int i;
-
-	if (unlikely(in_interrupt()))
-		return __memcpy(to, from, len);
-
-	p = to;
-	i = len >> 6; /* len/64 */
-
-	kernel_fpu_begin();
-
-	__asm__ __volatile__ (
-		"1: prefetch (%0)\n"		/* This set is 28 bytes */
-		"   prefetch 64(%0)\n"
-		"   prefetch 128(%0)\n"
-		"   prefetch 192(%0)\n"
-		"   prefetch 256(%0)\n"
-		"2:  \n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x1AEB, 1b\n"	/* jmp on 26 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-		".section __ex_table,\"a\"\n"
-		"	.align 4\n"
-		"	.long 1b, 3b\n"
-		".previous"
-		: : "r" (from) );
-		
-	
-	for(; i>5; i--)
-	{
-		__asm__ __volatile__ (
-		"1:  prefetch 320(%0)\n"
-		"2:  movq (%0), %%mm0\n"
-		"  movq 8(%0), %%mm1\n"
-		"  movq 16(%0), %%mm2\n"
-		"  movq 24(%0), %%mm3\n"
-		"  movq %%mm0, (%1)\n"
-		"  movq %%mm1, 8(%1)\n"
-		"  movq %%mm2, 16(%1)\n"
-		"  movq %%mm3, 24(%1)\n"
-		"  movq 32(%0), %%mm0\n"
-		"  movq 40(%0), %%mm1\n"
-		"  movq 48(%0), %%mm2\n"
-		"  movq 56(%0), %%mm3\n"
-		"  movq %%mm0, 32(%1)\n"
-		"  movq %%mm1, 40(%1)\n"
-		"  movq %%mm2, 48(%1)\n"
-		"  movq %%mm3, 56(%1)\n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x05EB, 1b\n"	/* jmp on 5 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-		".section __ex_table,\"a\"\n"
-		"	.align 4\n"
-		"	.long 1b, 3b\n"
-		".previous"
-		: : "r" (from), "r" (to) : "memory");
-		from+=64;
-		to+=64;
-	}
-
-	for(; i>0; i--)
-	{
-		__asm__ __volatile__ (
-		"  movq (%0), %%mm0\n"
-		"  movq 8(%0), %%mm1\n"
-		"  movq 16(%0), %%mm2\n"
-		"  movq 24(%0), %%mm3\n"
-		"  movq %%mm0, (%1)\n"
-		"  movq %%mm1, 8(%1)\n"
-		"  movq %%mm2, 16(%1)\n"
-		"  movq %%mm3, 24(%1)\n"
-		"  movq 32(%0), %%mm0\n"
-		"  movq 40(%0), %%mm1\n"
-		"  movq 48(%0), %%mm2\n"
-		"  movq 56(%0), %%mm3\n"
-		"  movq %%mm0, 32(%1)\n"
-		"  movq %%mm1, 40(%1)\n"
-		"  movq %%mm2, 48(%1)\n"
-		"  movq %%mm3, 56(%1)\n"
-		: : "r" (from), "r" (to) : "memory");
-		from+=64;
-		to+=64;
-	}
-	/*
-	 *	Now do the tail of the block
-	 */
-	__memcpy(to, from, len&63);
-	kernel_fpu_end();
-	return p;
-}
-
-#ifdef CONFIG_MK7
-
-/*
- *	The K7 has streaming cache bypass load/store. The Cyrix III, K6 and
- *	other MMX using processors do not.
- */
-
-static void fast_clear_page(void *page)
-{
-	int i;
-
-	kernel_fpu_begin();
-	
-	__asm__ __volatile__ (
-		"  pxor %%mm0, %%mm0\n" : :
-	);
-
-	for(i=0;i<4096/64;i++)
-	{
-		__asm__ __volatile__ (
-		"  movntq %%mm0, (%0)\n"
-		"  movntq %%mm0, 8(%0)\n"
-		"  movntq %%mm0, 16(%0)\n"
-		"  movntq %%mm0, 24(%0)\n"
-		"  movntq %%mm0, 32(%0)\n"
-		"  movntq %%mm0, 40(%0)\n"
-		"  movntq %%mm0, 48(%0)\n"
-		"  movntq %%mm0, 56(%0)\n"
-		: : "r" (page) : "memory");
-		page+=64;
-	}
-	/* since movntq is weakly-ordered, a "sfence" is needed to become
-	 * ordered again.
-	 */
-	__asm__ __volatile__ (
-		"  sfence \n" : :
-	);
-	kernel_fpu_end();
-}
-
-static void fast_copy_page(void *to, void *from)
-{
-	int i;
-
-	kernel_fpu_begin();
-
-	/* maybe the prefetch stuff can go before the expensive fnsave...
-	 * but that is for later. -AV
-	 */
-	__asm__ __volatile__ (
-		"1: prefetch (%0)\n"
-		"   prefetch 64(%0)\n"
-		"   prefetch 128(%0)\n"
-		"   prefetch 192(%0)\n"
-		"   prefetch 256(%0)\n"
-		"2:  \n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x1AEB, 1b\n"	/* jmp on 26 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-		".section __ex_table,\"a\"\n"
-		"	.align 4\n"
-		"	.long 1b, 3b\n"
-		".previous"
-		: : "r" (from) );
-
-	for(i=0; i<(4096-320)/64; i++)
-	{
-		__asm__ __volatile__ (
-		"1: prefetch 320(%0)\n"
-		"2: movq (%0), %%mm0\n"
-		"   movntq %%mm0, (%1)\n"
-		"   movq 8(%0), %%mm1\n"
-		"   movntq %%mm1, 8(%1)\n"
-		"   movq 16(%0), %%mm2\n"
-		"   movntq %%mm2, 16(%1)\n"
-		"   movq 24(%0), %%mm3\n"
-		"   movntq %%mm3, 24(%1)\n"
-		"   movq 32(%0), %%mm4\n"
-		"   movntq %%mm4, 32(%1)\n"
-		"   movq 40(%0), %%mm5\n"
-		"   movntq %%mm5, 40(%1)\n"
-		"   movq 48(%0), %%mm6\n"
-		"   movntq %%mm6, 48(%1)\n"
-		"   movq 56(%0), %%mm7\n"
-		"   movntq %%mm7, 56(%1)\n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x05EB, 1b\n"	/* jmp on 5 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-		".section __ex_table,\"a\"\n"
-		"	.align 4\n"
-		"	.long 1b, 3b\n"
-		".previous"
-		: : "r" (from), "r" (to) : "memory");
-		from+=64;
-		to+=64;
-	}
-	for(i=(4096-320)/64; i<4096/64; i++)
-	{
-		__asm__ __volatile__ (
-		"2: movq (%0), %%mm0\n"
-		"   movntq %%mm0, (%1)\n"
-		"   movq 8(%0), %%mm1\n"
-		"   movntq %%mm1, 8(%1)\n"
-		"   movq 16(%0), %%mm2\n"
-		"   movntq %%mm2, 16(%1)\n"
-		"   movq 24(%0), %%mm3\n"
-		"   movntq %%mm3, 24(%1)\n"
-		"   movq 32(%0), %%mm4\n"
-		"   movntq %%mm4, 32(%1)\n"
-		"   movq 40(%0), %%mm5\n"
-		"   movntq %%mm5, 40(%1)\n"
-		"   movq 48(%0), %%mm6\n"
-		"   movntq %%mm6, 48(%1)\n"
-		"   movq 56(%0), %%mm7\n"
-		"   movntq %%mm7, 56(%1)\n"
-		: : "r" (from), "r" (to) : "memory");
-		from+=64;
-		to+=64;
-	}
-	/* since movntq is weakly-ordered, a "sfence" is needed to become
-	 * ordered again.
-	 */
-	__asm__ __volatile__ (
-		"  sfence \n" : :
-	);
-	kernel_fpu_end();
-}
-
-#else
-
-/*
- *	Generic MMX implementation without K7 specific streaming
- */
- 
-static void fast_clear_page(void *page)
-{
-	int i;
-	
-	kernel_fpu_begin();
-	
-	__asm__ __volatile__ (
-		"  pxor %%mm0, %%mm0\n" : :
-	);
-
-	for(i=0;i<4096/128;i++)
-	{
-		__asm__ __volatile__ (
-		"  movq %%mm0, (%0)\n"
-		"  movq %%mm0, 8(%0)\n"
-		"  movq %%mm0, 16(%0)\n"
-		"  movq %%mm0, 24(%0)\n"
-		"  movq %%mm0, 32(%0)\n"
-		"  movq %%mm0, 40(%0)\n"
-		"  movq %%mm0, 48(%0)\n"
-		"  movq %%mm0, 56(%0)\n"
-		"  movq %%mm0, 64(%0)\n"
-		"  movq %%mm0, 72(%0)\n"
-		"  movq %%mm0, 80(%0)\n"
-		"  movq %%mm0, 88(%0)\n"
-		"  movq %%mm0, 96(%0)\n"
-		"  movq %%mm0, 104(%0)\n"
-		"  movq %%mm0, 112(%0)\n"
-		"  movq %%mm0, 120(%0)\n"
-		: : "r" (page) : "memory");
-		page+=128;
-	}
-
-	kernel_fpu_end();
-}
-
-static void fast_copy_page(void *to, void *from)
-{
-	int i;
-	
-	
-	kernel_fpu_begin();
-
-	__asm__ __volatile__ (
-		"1: prefetch (%0)\n"
-		"   prefetch 64(%0)\n"
-		"   prefetch 128(%0)\n"
-		"   prefetch 192(%0)\n"
-		"   prefetch 256(%0)\n"
-		"2:  \n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x1AEB, 1b\n"	/* jmp on 26 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-		".section __ex_table,\"a\"\n"
-		"	.align 4\n"
-		"	.long 1b, 3b\n"
-		".previous"
-		: : "r" (from) );
-
-	for(i=0; i<4096/64; i++)
-	{
-		__asm__ __volatile__ (
-		"1: prefetch 320(%0)\n"
-		"2: movq (%0), %%mm0\n"
-		"   movq 8(%0), %%mm1\n"
-		"   movq 16(%0), %%mm2\n"
-		"   movq 24(%0), %%mm3\n"
-		"   movq %%mm0, (%1)\n"
-		"   movq %%mm1, 8(%1)\n"
-		"   movq %%mm2, 16(%1)\n"
-		"   movq %%mm3, 24(%1)\n"
-		"   movq 32(%0), %%mm0\n"
-		"   movq 40(%0), %%mm1\n"
-		"   movq 48(%0), %%mm2\n"
-		"   movq 56(%0), %%mm3\n"
-		"   movq %%mm0, 32(%1)\n"
-		"   movq %%mm1, 40(%1)\n"
-		"   movq %%mm2, 48(%1)\n"
-		"   movq %%mm3, 56(%1)\n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x05EB, 1b\n"	/* jmp on 5 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-		".section __ex_table,\"a\"\n"
-		"	.align 4\n"
-		"	.long 1b, 3b\n"
-		".previous"
-		: : "r" (from), "r" (to) : "memory");
-		from+=64;
-		to+=64;
-	}
-	kernel_fpu_end();
-}
-
-
-#endif
-
-/*
- *	Favour MMX for page clear and copy. 
- */
-
-static void slow_zero_page(void * page)
-{
-	int d0, d1;
-	__asm__ __volatile__( \
-		"cld\n\t" \
-		"rep ; stosl" \
-		: "=&c" (d0), "=&D" (d1)
-		:"a" (0),"1" (page),"0" (1024)
-		:"memory");
-}
- 
-void mmx_clear_page(void * page)
-{
-	if(unlikely(in_interrupt()))
-		slow_zero_page(page);
-	else
-		fast_clear_page(page);
-}
-
-static void slow_copy_page(void *to, void *from)
-{
-	int d0, d1, d2;
-	__asm__ __volatile__( \
-		"cld\n\t" \
-		"rep ; movsl" \
-		: "=&c" (d0), "=&D" (d1), "=&S" (d2) \
-		: "0" (1024),"1" ((long) to),"2" ((long) from) \
-		: "memory");
-}
-  
-
-void mmx_copy_page(void *to, void *from)
-{
-	if(unlikely(in_interrupt()))
-		slow_copy_page(to, from);
-	else
-		fast_copy_page(to, from);
-}
-
-EXPORT_SYMBOL(_mmx_memcpy);
-EXPORT_SYMBOL(mmx_clear_page);
-EXPORT_SYMBOL(mmx_copy_page);