Initial import

1 files changed, 422 insertions, 0 deletions

diff --git a/arch/sparc/lib/U3memcpy.S b/arch/sparc/lib/U3memcpy.S
new file mode 100644
index 000000000..7cae9cc6a
--- /dev/null
+++ b/arch/sparc/lib/U3memcpy.S
@@ -0,0 +1,422 @@
+/* U3memcpy.S: UltraSparc-III optimized memcpy.
+ *
+ * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
+ */
+
+#ifdef __KERNEL__
+#include <asm/visasm.h>
+#include <asm/asi.h>
+#define GLOBAL_SPARE	%g7
+#else
+#define ASI_BLK_P 0xf0
+#define FPRS_FEF  0x04
+#ifdef MEMCPY_DEBUG
+#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs; \
+		     clr %g1; clr %g2; clr %g3; subcc %g0, %g0, %g0;
+#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
+#else
+#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs
+#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
+#endif
+#define GLOBAL_SPARE	%g5
+#endif
+
+#ifndef EX_LD
+#define EX_LD(x)	x
+#endif
+
+#ifndef EX_ST
+#define EX_ST(x)	x
+#endif
+
+#ifndef EX_RETVAL
+#define EX_RETVAL(x)	x
+#endif
+
+#ifndef LOAD
+#define LOAD(type,addr,dest)	type [addr], dest
+#endif
+
+#ifndef STORE
+#define STORE(type,src,addr)	type src, [addr]
+#endif
+
+#ifndef STORE_BLK
+#define STORE_BLK(src,addr)	stda src, [addr] ASI_BLK_P
+#endif
+
+#ifndef FUNC_NAME
+#define FUNC_NAME	U3memcpy
+#endif
+
+#ifndef PREAMBLE
+#define PREAMBLE
+#endif
+
+#ifndef XCC
+#define XCC xcc
+#endif
+
+	.register	%g2,#scratch
+	.register	%g3,#scratch
+
+	/* Special/non-trivial issues of this code:
+	 *
+	 * 1) %o5 is preserved from VISEntryHalf to VISExitHalf
+	 * 2) Only low 32 FPU registers are used so that only the
+	 *    lower half of the FPU register set is dirtied by this
+	 *    code.  This is especially important in the kernel.
+	 * 3) This code never prefetches cachelines past the end
+	 *    of the source buffer.
+	 */
+
+	.text
+	.align		64
+
+	/* The cheetah's flexible spine, oversized liver, enlarged heart,
+	 * slender muscular body, and claws make it the swiftest hunter
+	 * in Africa and the fastest animal on land.  Can reach speeds
+	 * of up to 2.4GB per second.
+	 */
+
+	.globl	FUNC_NAME
+	.type	FUNC_NAME,#function
+FUNC_NAME:	/* %o0=dst, %o1=src, %o2=len */
+	srlx		%o2, 31, %g2
+	cmp		%g2, 0
+	tne		%xcc, 5
+	PREAMBLE
+	mov		%o0, %o4
+	cmp		%o2, 0
+	be,pn		%XCC, 85f
+	 or		%o0, %o1, %o3
+	cmp		%o2, 16
+	blu,a,pn	%XCC, 80f
+	 or		%o3, %o2, %o3
+
+	cmp		%o2, (3 * 64)
+	blu,pt		%XCC, 70f
+	 andcc		%o3, 0x7, %g0
+
+	/* Clobbers o5/g1/g2/g3/g7/icc/xcc.  We must preserve
+	 * o5 from here until we hit VISExitHalf.
+	 */
+	VISEntryHalf
+
+	/* Is 'dst' already aligned on an 64-byte boundary? */
+	andcc		%o0, 0x3f, %g2
+	be,pt		%XCC, 2f
+
+	/* Compute abs((dst & 0x3f) - 0x40) into %g2.  This is the number
+	 * of bytes to copy to make 'dst' 64-byte aligned.  We pre-
+	 * subtract this from 'len'.
+	 */
+	 sub		%o0, %o1, GLOBAL_SPARE
+	sub		%g2, 0x40, %g2
+	sub		%g0, %g2, %g2
+	sub		%o2, %g2, %o2
+	andcc		%g2, 0x7, %g1
+	be,pt		%icc, 2f
+	 and		%g2, 0x38, %g2
+
+1:	subcc		%g1, 0x1, %g1
+	EX_LD(LOAD(ldub, %o1 + 0x00, %o3))
+	EX_ST(STORE(stb, %o3, %o1 + GLOBAL_SPARE))
+	bgu,pt		%XCC, 1b
+	 add		%o1, 0x1, %o1
+
+	add		%o1, GLOBAL_SPARE, %o0
+
+2:	cmp		%g2, 0x0
+	and		%o1, 0x7, %g1
+	be,pt		%icc, 3f
+	 alignaddr	%o1, %g0, %o1
+
+	EX_LD(LOAD(ldd, %o1, %f4))
+1:	EX_LD(LOAD(ldd, %o1 + 0x8, %f6))
+	add		%o1, 0x8, %o1
+	subcc		%g2, 0x8, %g2
+	faligndata	%f4, %f6, %f0
+	EX_ST(STORE(std, %f0, %o0))
+	be,pn		%icc, 3f
+	 add		%o0, 0x8, %o0
+
+	EX_LD(LOAD(ldd, %o1 + 0x8, %f4))
+	add		%o1, 0x8, %o1
+	subcc		%g2, 0x8, %g2
+	faligndata	%f6, %f4, %f2
+	EX_ST(STORE(std, %f2, %o0))
+	bne,pt		%icc, 1b
+	 add		%o0, 0x8, %o0
+
+3:	LOAD(prefetch, %o1 + 0x000, #one_read)
+	LOAD(prefetch, %o1 + 0x040, #one_read)
+	andn		%o2, (0x40 - 1), GLOBAL_SPARE
+	LOAD(prefetch, %o1 + 0x080, #one_read)
+	LOAD(prefetch, %o1 + 0x0c0, #one_read)
+	LOAD(prefetch, %o1 + 0x100, #one_read)
+	EX_LD(LOAD(ldd, %o1 + 0x000, %f0))
+	LOAD(prefetch, %o1 + 0x140, #one_read)
+	EX_LD(LOAD(ldd, %o1 + 0x008, %f2))
+	LOAD(prefetch, %o1 + 0x180, #one_read)
+	EX_LD(LOAD(ldd, %o1 + 0x010, %f4))
+	LOAD(prefetch, %o1 + 0x1c0, #one_read)
+	faligndata	%f0, %f2, %f16
+	EX_LD(LOAD(ldd, %o1 + 0x018, %f6))
+	faligndata	%f2, %f4, %f18
+	EX_LD(LOAD(ldd, %o1 + 0x020, %f8))
+	faligndata	%f4, %f6, %f20
+	EX_LD(LOAD(ldd, %o1 + 0x028, %f10))
+	faligndata	%f6, %f8, %f22
+
+	EX_LD(LOAD(ldd, %o1 + 0x030, %f12))
+	faligndata	%f8, %f10, %f24
+	EX_LD(LOAD(ldd, %o1 + 0x038, %f14))
+	faligndata	%f10, %f12, %f26
+	EX_LD(LOAD(ldd, %o1 + 0x040, %f0))
+
+	subcc		GLOBAL_SPARE, 0x80, GLOBAL_SPARE
+	add		%o1, 0x40, %o1
+	bgu,pt		%XCC, 1f
+	 srl		GLOBAL_SPARE, 6, %o3
+	ba,pt		%xcc, 2f
+	 nop
+
+	.align		64
+1:
+	EX_LD(LOAD(ldd, %o1 + 0x008, %f2))
+	faligndata	%f12, %f14, %f28
+	EX_LD(LOAD(ldd, %o1 + 0x010, %f4))
+	faligndata	%f14, %f0, %f30
+	EX_ST(STORE_BLK(%f16, %o0))
+	EX_LD(LOAD(ldd, %o1 + 0x018, %f6))
+	faligndata	%f0, %f2, %f16
+	add		%o0, 0x40, %o0
+
+	EX_LD(LOAD(ldd, %o1 + 0x020, %f8))
+	faligndata	%f2, %f4, %f18
+	EX_LD(LOAD(ldd, %o1 + 0x028, %f10))
+	faligndata	%f4, %f6, %f20
+	EX_LD(LOAD(ldd, %o1 + 0x030, %f12))
+	subcc		%o3, 0x01, %o3
+	faligndata	%f6, %f8, %f22
+	EX_LD(LOAD(ldd, %o1 + 0x038, %f14))
+
+	faligndata	%f8, %f10, %f24
+	EX_LD(LOAD(ldd, %o1 + 0x040, %f0))
+	LOAD(prefetch, %o1 + 0x1c0, #one_read)
+	faligndata	%f10, %f12, %f26
+	bg,pt		%XCC, 1b
+	 add		%o1, 0x40, %o1
+
+	/* Finally we copy the last full 64-byte block. */
+2:
+	EX_LD(LOAD(ldd, %o1 + 0x008, %f2))
+	faligndata	%f12, %f14, %f28
+	EX_LD(LOAD(ldd, %o1 + 0x010, %f4))
+	faligndata	%f14, %f0, %f30
+	EX_ST(STORE_BLK(%f16, %o0))
+	EX_LD(LOAD(ldd, %o1 + 0x018, %f6))
+	faligndata	%f0, %f2, %f16
+	EX_LD(LOAD(ldd, %o1 + 0x020, %f8))
+	faligndata	%f2, %f4, %f18
+	EX_LD(LOAD(ldd, %o1 + 0x028, %f10))
+	faligndata	%f4, %f6, %f20
+	EX_LD(LOAD(ldd, %o1 + 0x030, %f12))
+	faligndata	%f6, %f8, %f22
+	EX_LD(LOAD(ldd, %o1 + 0x038, %f14))
+	faligndata	%f8, %f10, %f24
+	cmp		%g1, 0
+	be,pt		%XCC, 1f
+	 add		%o0, 0x40, %o0
+	EX_LD(LOAD(ldd, %o1 + 0x040, %f0))
+1:	faligndata	%f10, %f12, %f26
+	faligndata	%f12, %f14, %f28
+	faligndata	%f14, %f0, %f30
+	EX_ST(STORE_BLK(%f16, %o0))
+	add		%o0, 0x40, %o0
+	add		%o1, 0x40, %o1
+	membar		#Sync
+
+	/* Now we copy the (len modulo 64) bytes at the end.
+	 * Note how we borrow the %f0 loaded above.
+	 *
+	 * Also notice how this code is careful not to perform a
+	 * load past the end of the src buffer.
+	 */
+	and		%o2, 0x3f, %o2
+	andcc		%o2, 0x38, %g2
+	be,pn		%XCC, 2f
+	 subcc		%g2, 0x8, %g2
+	be,pn		%XCC, 2f
+	 cmp		%g1, 0
+
+	sub		%o2, %g2, %o2
+	be,a,pt		%XCC, 1f
+	 EX_LD(LOAD(ldd, %o1 + 0x00, %f0))
+
+1:	EX_LD(LOAD(ldd, %o1 + 0x08, %f2))
+	add		%o1, 0x8, %o1
+	subcc		%g2, 0x8, %g2
+	faligndata	%f0, %f2, %f8
+	EX_ST(STORE(std, %f8, %o0))
+	be,pn		%XCC, 2f
+	 add		%o0, 0x8, %o0
+	EX_LD(LOAD(ldd, %o1 + 0x08, %f0))
+	add		%o1, 0x8, %o1
+	subcc		%g2, 0x8, %g2
+	faligndata	%f2, %f0, %f8
+	EX_ST(STORE(std, %f8, %o0))
+	bne,pn		%XCC, 1b
+	 add		%o0, 0x8, %o0
+
+	/* If anything is left, we copy it one byte at a time.
+	 * Note that %g1 is (src & 0x3) saved above before the
+	 * alignaddr was performed.
+	 */
+2:
+	cmp		%o2, 0
+	add		%o1, %g1, %o1
+	VISExitHalf
+	be,pn		%XCC, 85f
+	 sub		%o0, %o1, %o3
+
+	andcc		%g1, 0x7, %g0
+	bne,pn		%icc, 90f
+	 andcc		%o2, 0x8, %g0
+	be,pt		%icc, 1f
+	 nop
+	EX_LD(LOAD(ldx, %o1, %o5))
+	EX_ST(STORE(stx, %o5, %o1 + %o3))
+	add		%o1, 0x8, %o1
+
+1:	andcc		%o2, 0x4, %g0
+	be,pt		%icc, 1f
+	 nop
+	EX_LD(LOAD(lduw, %o1, %o5))
+	EX_ST(STORE(stw, %o5, %o1 + %o3))
+	add		%o1, 0x4, %o1
+
+1:	andcc		%o2, 0x2, %g0
+	be,pt		%icc, 1f
+	 nop
+	EX_LD(LOAD(lduh, %o1, %o5))
+	EX_ST(STORE(sth, %o5, %o1 + %o3))
+	add		%o1, 0x2, %o1
+
+1:	andcc		%o2, 0x1, %g0
+	be,pt		%icc, 85f
+	 nop
+	EX_LD(LOAD(ldub, %o1, %o5))
+	ba,pt		%xcc, 85f
+	 EX_ST(STORE(stb, %o5, %o1 + %o3))
+
+	.align		64
+70: /* 16 < len <= 64 */
+	bne,pn		%XCC, 75f
+	 sub		%o0, %o1, %o3
+
+72:
+	andn		%o2, 0xf, GLOBAL_SPARE
+	and		%o2, 0xf, %o2
+1:	subcc		GLOBAL_SPARE, 0x10, GLOBAL_SPARE
+	EX_LD(LOAD(ldx, %o1 + 0x00, %o5))
+	EX_LD(LOAD(ldx, %o1 + 0x08, %g1))
+	EX_ST(STORE(stx, %o5, %o1 + %o3))
+	add		%o1, 0x8, %o1
+	EX_ST(STORE(stx, %g1, %o1 + %o3))
+	bgu,pt		%XCC, 1b
+	 add		%o1, 0x8, %o1
+73:	andcc		%o2, 0x8, %g0
+	be,pt		%XCC, 1f
+	 nop
+	sub		%o2, 0x8, %o2
+	EX_LD(LOAD(ldx, %o1, %o5))
+	EX_ST(STORE(stx, %o5, %o1 + %o3))
+	add		%o1, 0x8, %o1
+1:	andcc		%o2, 0x4, %g0
+	be,pt		%XCC, 1f
+	 nop
+	sub		%o2, 0x4, %o2
+	EX_LD(LOAD(lduw, %o1, %o5))
+	EX_ST(STORE(stw, %o5, %o1 + %o3))
+	add		%o1, 0x4, %o1
+1:	cmp		%o2, 0
+	be,pt		%XCC, 85f
+	 nop
+	ba,pt		%xcc, 90f
+	 nop
+
+75:
+	andcc		%o0, 0x7, %g1
+	sub		%g1, 0x8, %g1
+	be,pn		%icc, 2f
+	 sub		%g0, %g1, %g1
+	sub		%o2, %g1, %o2
+
+1:	subcc		%g1, 1, %g1
+	EX_LD(LOAD(ldub, %o1, %o5))
+	EX_ST(STORE(stb, %o5, %o1 + %o3))
+	bgu,pt		%icc, 1b
+	 add		%o1, 1, %o1
+
+2:	add		%o1, %o3, %o0
+	andcc		%o1, 0x7, %g1
+	bne,pt		%icc, 8f
+	 sll		%g1, 3, %g1
+
+	cmp		%o2, 16
+	bgeu,pt		%icc, 72b
+	 nop
+	ba,a,pt		%xcc, 73b
+
+8:	mov		64, %o3
+	andn		%o1, 0x7, %o1
+	EX_LD(LOAD(ldx, %o1, %g2))
+	sub		%o3, %g1, %o3
+	andn		%o2, 0x7, GLOBAL_SPARE
+	sllx		%g2, %g1, %g2
+1:	EX_LD(LOAD(ldx, %o1 + 0x8, %g3))
+	subcc		GLOBAL_SPARE, 0x8, GLOBAL_SPARE
+	add		%o1, 0x8, %o1
+	srlx		%g3, %o3, %o5
+	or		%o5, %g2, %o5
+	EX_ST(STORE(stx, %o5, %o0))
+	add		%o0, 0x8, %o0
+	bgu,pt		%icc, 1b
+	 sllx		%g3, %g1, %g2
+
+	srl		%g1, 3, %g1
+	andcc		%o2, 0x7, %o2
+	be,pn		%icc, 85f
+	 add		%o1, %g1, %o1
+	ba,pt		%xcc, 90f
+	 sub		%o0, %o1, %o3
+
+	.align		64
+80: /* 0 < len <= 16 */
+	andcc		%o3, 0x3, %g0
+	bne,pn		%XCC, 90f
+	 sub		%o0, %o1, %o3
+
+1:
+	subcc		%o2, 4, %o2
+	EX_LD(LOAD(lduw, %o1, %g1))
+	EX_ST(STORE(stw, %g1, %o1 + %o3))
+	bgu,pt		%XCC, 1b
+	 add		%o1, 4, %o1
+
+85:	retl
+	 mov		EX_RETVAL(%o4), %o0
+
+	.align		32
+90:
+	subcc		%o2, 1, %o2
+	EX_LD(LOAD(ldub, %o1, %g1))
+	EX_ST(STORE(stb, %g1, %o1 + %o3))
+	bgu,pt		%XCC, 90b
+	 add		%o1, 1, %o1
+	retl
+	 mov		EX_RETVAL(%o4), %o0
+
+	.size		FUNC_NAME, .-FUNC_NAME