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-rw-r--r--arch/sparc/lib/NG2memcpy.S520
1 files changed, 520 insertions, 0 deletions
diff --git a/arch/sparc/lib/NG2memcpy.S b/arch/sparc/lib/NG2memcpy.S
new file mode 100644
index 00000000000..0aed75653b5
--- /dev/null
+++ b/arch/sparc/lib/NG2memcpy.S
@@ -0,0 +1,520 @@
+/* NG2memcpy.S: Niagara-2 optimized memcpy.
+ *
+ * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
+ */
+
+#ifdef __KERNEL__
+#include <asm/visasm.h>
+#include <asm/asi.h>
+#define GLOBAL_SPARE %g7
+#else
+#define ASI_PNF 0x82
+#define ASI_BLK_P 0xf0
+#define ASI_BLK_INIT_QUAD_LDD_P 0xe2
+#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 STORE_ASI
+#ifndef SIMULATE_NIAGARA_ON_NON_NIAGARA
+#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_P
+#else
+#define STORE_ASI 0x80 /* ASI_P */
+#endif
+#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 LOAD_BLK
+#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_P, dest
+#endif
+
+#ifndef STORE
+#ifndef MEMCPY_DEBUG
+#define STORE(type,src,addr) type src, [addr]
+#else
+#define STORE(type,src,addr) type##a src, [addr] 0x80
+#endif
+#endif
+
+#ifndef STORE_BLK
+#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_P
+#endif
+
+#ifndef STORE_INIT
+#define STORE_INIT(src,addr) stxa src, [addr] STORE_ASI
+#endif
+
+#ifndef FUNC_NAME
+#define FUNC_NAME NG2memcpy
+#endif
+
+#ifndef PREAMBLE
+#define PREAMBLE
+#endif
+
+#ifndef XCC
+#define XCC xcc
+#endif
+
+#define FREG_FROB(x0, x1, x2, x3, x4, x5, x6, x7, x8) \
+ faligndata %x0, %x1, %f0; \
+ faligndata %x1, %x2, %f2; \
+ faligndata %x2, %x3, %f4; \
+ faligndata %x3, %x4, %f6; \
+ faligndata %x4, %x5, %f8; \
+ faligndata %x5, %x6, %f10; \
+ faligndata %x6, %x7, %f12; \
+ faligndata %x7, %x8, %f14;
+
+#define FREG_MOVE_1(x0) \
+ fmovd %x0, %f0;
+#define FREG_MOVE_2(x0, x1) \
+ fmovd %x0, %f0; \
+ fmovd %x1, %f2;
+#define FREG_MOVE_3(x0, x1, x2) \
+ fmovd %x0, %f0; \
+ fmovd %x1, %f2; \
+ fmovd %x2, %f4;
+#define FREG_MOVE_4(x0, x1, x2, x3) \
+ fmovd %x0, %f0; \
+ fmovd %x1, %f2; \
+ fmovd %x2, %f4; \
+ fmovd %x3, %f6;
+#define FREG_MOVE_5(x0, x1, x2, x3, x4) \
+ fmovd %x0, %f0; \
+ fmovd %x1, %f2; \
+ fmovd %x2, %f4; \
+ fmovd %x3, %f6; \
+ fmovd %x4, %f8;
+#define FREG_MOVE_6(x0, x1, x2, x3, x4, x5) \
+ fmovd %x0, %f0; \
+ fmovd %x1, %f2; \
+ fmovd %x2, %f4; \
+ fmovd %x3, %f6; \
+ fmovd %x4, %f8; \
+ fmovd %x5, %f10;
+#define FREG_MOVE_7(x0, x1, x2, x3, x4, x5, x6) \
+ fmovd %x0, %f0; \
+ fmovd %x1, %f2; \
+ fmovd %x2, %f4; \
+ fmovd %x3, %f6; \
+ fmovd %x4, %f8; \
+ fmovd %x5, %f10; \
+ fmovd %x6, %f12;
+#define FREG_MOVE_8(x0, x1, x2, x3, x4, x5, x6, x7) \
+ fmovd %x0, %f0; \
+ fmovd %x1, %f2; \
+ fmovd %x2, %f4; \
+ fmovd %x3, %f6; \
+ fmovd %x4, %f8; \
+ fmovd %x5, %f10; \
+ fmovd %x6, %f12; \
+ fmovd %x7, %f14;
+#define FREG_LOAD_1(base, x0) \
+ EX_LD(LOAD(ldd, base + 0x00, %x0))
+#define FREG_LOAD_2(base, x0, x1) \
+ EX_LD(LOAD(ldd, base + 0x00, %x0)); \
+ EX_LD(LOAD(ldd, base + 0x08, %x1));
+#define FREG_LOAD_3(base, x0, x1, x2) \
+ EX_LD(LOAD(ldd, base + 0x00, %x0)); \
+ EX_LD(LOAD(ldd, base + 0x08, %x1)); \
+ EX_LD(LOAD(ldd, base + 0x10, %x2));
+#define FREG_LOAD_4(base, x0, x1, x2, x3) \
+ EX_LD(LOAD(ldd, base + 0x00, %x0)); \
+ EX_LD(LOAD(ldd, base + 0x08, %x1)); \
+ EX_LD(LOAD(ldd, base + 0x10, %x2)); \
+ EX_LD(LOAD(ldd, base + 0x18, %x3));
+#define FREG_LOAD_5(base, x0, x1, x2, x3, x4) \
+ EX_LD(LOAD(ldd, base + 0x00, %x0)); \
+ EX_LD(LOAD(ldd, base + 0x08, %x1)); \
+ EX_LD(LOAD(ldd, base + 0x10, %x2)); \
+ EX_LD(LOAD(ldd, base + 0x18, %x3)); \
+ EX_LD(LOAD(ldd, base + 0x20, %x4));
+#define FREG_LOAD_6(base, x0, x1, x2, x3, x4, x5) \
+ EX_LD(LOAD(ldd, base + 0x00, %x0)); \
+ EX_LD(LOAD(ldd, base + 0x08, %x1)); \
+ EX_LD(LOAD(ldd, base + 0x10, %x2)); \
+ EX_LD(LOAD(ldd, base + 0x18, %x3)); \
+ EX_LD(LOAD(ldd, base + 0x20, %x4)); \
+ EX_LD(LOAD(ldd, base + 0x28, %x5));
+#define FREG_LOAD_7(base, x0, x1, x2, x3, x4, x5, x6) \
+ EX_LD(LOAD(ldd, base + 0x00, %x0)); \
+ EX_LD(LOAD(ldd, base + 0x08, %x1)); \
+ EX_LD(LOAD(ldd, base + 0x10, %x2)); \
+ EX_LD(LOAD(ldd, base + 0x18, %x3)); \
+ EX_LD(LOAD(ldd, base + 0x20, %x4)); \
+ EX_LD(LOAD(ldd, base + 0x28, %x5)); \
+ EX_LD(LOAD(ldd, base + 0x30, %x6));
+
+ .register %g2,#scratch
+ .register %g3,#scratch
+
+ .text
+ .align 64
+
+ .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, GLOBAL_SPARE
+ cmp %o2, 0
+ be,pn %XCC, 85f
+ or %o0, %o1, %o3
+ cmp %o2, 16
+ blu,a,pn %XCC, 80f
+ or %o3, %o2, %o3
+
+ /* 2 blocks (128 bytes) is the minimum we can do the block
+ * copy with. We need to ensure that we'll iterate at least
+ * once in the block copy loop. At worst we'll need to align
+ * the destination to a 64-byte boundary which can chew up
+ * to (64 - 1) bytes from the length before we perform the
+ * block copy loop.
+ *
+ * However, the cut-off point, performance wise, is around
+ * 4 64-byte blocks.
+ */
+ cmp %o2, (4 * 64)
+ blu,pt %XCC, 75f
+ andcc %o3, 0x7, %g0
+
+ /* %o0: dst
+ * %o1: src
+ * %o2: len (known to be >= 128)
+ *
+ * The block copy loops can use %o4, %g2, %g3 as
+ * temporaries while copying the data. %o5 must
+ * be preserved between VISEntryHalf and VISExitHalf
+ */
+
+ LOAD(prefetch, %o1 + 0x000, #one_read)
+ LOAD(prefetch, %o1 + 0x040, #one_read)
+ LOAD(prefetch, %o1 + 0x080, #one_read)
+
+ /* Align destination on 64-byte boundary. */
+ andcc %o0, (64 - 1), %o4
+ be,pt %XCC, 2f
+ sub %o4, 64, %o4
+ sub %g0, %o4, %o4 ! bytes to align dst
+ sub %o2, %o4, %o2
+1: subcc %o4, 1, %o4
+ EX_LD(LOAD(ldub, %o1, %g1))
+ EX_ST(STORE(stb, %g1, %o0))
+ add %o1, 1, %o1
+ bne,pt %XCC, 1b
+ add %o0, 1, %o0
+
+2:
+ /* Clobbers o5/g1/g2/g3/g7/icc/xcc. We must preserve
+ * o5 from here until we hit VISExitHalf.
+ */
+ VISEntryHalf
+
+ alignaddr %o1, %g0, %g0
+
+ add %o1, (64 - 1), %o4
+ andn %o4, (64 - 1), %o4
+ andn %o2, (64 - 1), %g1
+ sub %o2, %g1, %o2
+
+ and %o1, (64 - 1), %g2
+ add %o1, %g1, %o1
+ sub %o0, %o4, %g3
+ brz,pt %g2, 190f
+ cmp %g2, 32
+ blu,a 5f
+ cmp %g2, 16
+ cmp %g2, 48
+ blu,a 4f
+ cmp %g2, 40
+ cmp %g2, 56
+ blu 170f
+ nop
+ ba,a,pt %xcc, 180f
+
+4: /* 32 <= low bits < 48 */
+ blu 150f
+ nop
+ ba,a,pt %xcc, 160f
+5: /* 0 < low bits < 32 */
+ blu,a 6f
+ cmp %g2, 8
+ cmp %g2, 24
+ blu 130f
+ nop
+ ba,a,pt %xcc, 140f
+6: /* 0 < low bits < 16 */
+ bgeu 120f
+ nop
+ /* fall through for 0 < low bits < 8 */
+110: sub %o4, 64, %g2
+ EX_LD(LOAD_BLK(%g2, %f0))
+1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
+ EX_LD(LOAD_BLK(%o4, %f16))
+ FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f14, f16)
+ EX_ST(STORE_BLK(%f0, %o4 + %g3))
+ FREG_MOVE_8(f16, f18, f20, f22, f24, f26, f28, f30)
+ subcc %g1, 64, %g1
+ add %o4, 64, %o4
+ bne,pt %xcc, 1b
+ LOAD(prefetch, %o4 + 64, #one_read)
+ ba,pt %xcc, 195f
+ nop
+
+120: sub %o4, 56, %g2
+ FREG_LOAD_7(%g2, f0, f2, f4, f6, f8, f10, f12)
+1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
+ EX_LD(LOAD_BLK(%o4, %f16))
+ FREG_FROB(f0, f2, f4, f6, f8, f10, f12, f16, f18)
+ EX_ST(STORE_BLK(%f0, %o4 + %g3))
+ FREG_MOVE_7(f18, f20, f22, f24, f26, f28, f30)
+ subcc %g1, 64, %g1
+ add %o4, 64, %o4
+ bne,pt %xcc, 1b
+ LOAD(prefetch, %o4 + 64, #one_read)
+ ba,pt %xcc, 195f
+ nop
+
+130: sub %o4, 48, %g2
+ FREG_LOAD_6(%g2, f0, f2, f4, f6, f8, f10)
+1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
+ EX_LD(LOAD_BLK(%o4, %f16))
+ FREG_FROB(f0, f2, f4, f6, f8, f10, f16, f18, f20)
+ EX_ST(STORE_BLK(%f0, %o4 + %g3))
+ FREG_MOVE_6(f20, f22, f24, f26, f28, f30)
+ subcc %g1, 64, %g1
+ add %o4, 64, %o4
+ bne,pt %xcc, 1b
+ LOAD(prefetch, %o4 + 64, #one_read)
+ ba,pt %xcc, 195f
+ nop
+
+140: sub %o4, 40, %g2
+ FREG_LOAD_5(%g2, f0, f2, f4, f6, f8)
+1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
+ EX_LD(LOAD_BLK(%o4, %f16))
+ FREG_FROB(f0, f2, f4, f6, f8, f16, f18, f20, f22)
+ EX_ST(STORE_BLK(%f0, %o4 + %g3))
+ FREG_MOVE_5(f22, f24, f26, f28, f30)
+ subcc %g1, 64, %g1
+ add %o4, 64, %o4
+ bne,pt %xcc, 1b
+ LOAD(prefetch, %o4 + 64, #one_read)
+ ba,pt %xcc, 195f
+ nop
+
+150: sub %o4, 32, %g2
+ FREG_LOAD_4(%g2, f0, f2, f4, f6)
+1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
+ EX_LD(LOAD_BLK(%o4, %f16))
+ FREG_FROB(f0, f2, f4, f6, f16, f18, f20, f22, f24)
+ EX_ST(STORE_BLK(%f0, %o4 + %g3))
+ FREG_MOVE_4(f24, f26, f28, f30)
+ subcc %g1, 64, %g1
+ add %o4, 64, %o4
+ bne,pt %xcc, 1b
+ LOAD(prefetch, %o4 + 64, #one_read)
+ ba,pt %xcc, 195f
+ nop
+
+160: sub %o4, 24, %g2
+ FREG_LOAD_3(%g2, f0, f2, f4)
+1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
+ EX_LD(LOAD_BLK(%o4, %f16))
+ FREG_FROB(f0, f2, f4, f16, f18, f20, f22, f24, f26)
+ EX_ST(STORE_BLK(%f0, %o4 + %g3))
+ FREG_MOVE_3(f26, f28, f30)
+ subcc %g1, 64, %g1
+ add %o4, 64, %o4
+ bne,pt %xcc, 1b
+ LOAD(prefetch, %o4 + 64, #one_read)
+ ba,pt %xcc, 195f
+ nop
+
+170: sub %o4, 16, %g2
+ FREG_LOAD_2(%g2, f0, f2)
+1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
+ EX_LD(LOAD_BLK(%o4, %f16))
+ FREG_FROB(f0, f2, f16, f18, f20, f22, f24, f26, f28)
+ EX_ST(STORE_BLK(%f0, %o4 + %g3))
+ FREG_MOVE_2(f28, f30)
+ subcc %g1, 64, %g1
+ add %o4, 64, %o4
+ bne,pt %xcc, 1b
+ LOAD(prefetch, %o4 + 64, #one_read)
+ ba,pt %xcc, 195f
+ nop
+
+180: sub %o4, 8, %g2
+ FREG_LOAD_1(%g2, f0)
+1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
+ EX_LD(LOAD_BLK(%o4, %f16))
+ FREG_FROB(f0, f16, f18, f20, f22, f24, f26, f28, f30)
+ EX_ST(STORE_BLK(%f0, %o4 + %g3))
+ FREG_MOVE_1(f30)
+ subcc %g1, 64, %g1
+ add %o4, 64, %o4
+ bne,pt %xcc, 1b
+ LOAD(prefetch, %o4 + 64, #one_read)
+ ba,pt %xcc, 195f
+ nop
+
+190:
+1: EX_ST(STORE_INIT(%g0, %o4 + %g3))
+ subcc %g1, 64, %g1
+ EX_LD(LOAD_BLK(%o4, %f0))
+ EX_ST(STORE_BLK(%f0, %o4 + %g3))
+ add %o4, 64, %o4
+ bne,pt %xcc, 1b
+ LOAD(prefetch, %o4 + 64, #one_read)
+
+195:
+ add %o4, %g3, %o0
+ membar #Sync
+
+ VISExitHalf
+
+ /* %o2 contains any final bytes still needed to be copied
+ * over. If anything is left, we copy it one byte at a time.
+ */
+ brz,pt %o2, 85f
+ sub %o0, %o1, %o3
+ ba,a,pt %XCC, 90f
+
+ .align 64
+75: /* 16 < len <= 64 */
+ bne,pn %XCC, 75f
+ sub %o0, %o1, %o3
+
+72:
+ andn %o2, 0xf, %o4
+ and %o2, 0xf, %o2
+1: subcc %o4, 0x10, %o4
+ EX_LD(LOAD(ldx, %o1, %o5))
+ add %o1, 0x08, %o1
+ EX_LD(LOAD(ldx, %o1, %g1))
+ sub %o1, 0x08, %o1
+ 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, %o4
+ sllx %g2, %g1, %g2
+1: add %o1, 0x8, %o1
+ EX_LD(LOAD(ldx, %o1, %g3))
+ subcc %o4, 0x8, %o4
+ 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(GLOBAL_SPARE), %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(GLOBAL_SPARE), %o0
+
+ .size FUNC_NAME, .-FUNC_NAME
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