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520 lines
13 KiB
520 lines
13 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* U3memcpy.S: UltraSparc-III optimized memcpy. |
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* |
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* Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) |
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*/ |
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#ifdef __KERNEL__ |
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#include <linux/linkage.h> |
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#include <asm/visasm.h> |
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#include <asm/asi.h> |
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#define GLOBAL_SPARE %g7 |
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#else |
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#define ASI_BLK_P 0xf0 |
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#define FPRS_FEF 0x04 |
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#ifdef MEMCPY_DEBUG |
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#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs; \ |
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clr %g1; clr %g2; clr %g3; subcc %g0, %g0, %g0; |
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#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs |
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#else |
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#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs |
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#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs |
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#endif |
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#define GLOBAL_SPARE %g5 |
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#endif |
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#ifndef EX_LD |
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#define EX_LD(x,y) x |
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#endif |
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#ifndef EX_LD_FP |
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#define EX_LD_FP(x,y) x |
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#endif |
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#ifndef EX_ST |
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#define EX_ST(x,y) x |
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#endif |
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#ifndef EX_ST_FP |
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#define EX_ST_FP(x,y) x |
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#endif |
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#ifndef LOAD |
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#define LOAD(type,addr,dest) type [addr], dest |
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#endif |
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#ifndef STORE |
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#define STORE(type,src,addr) type src, [addr] |
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#endif |
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#ifndef STORE_BLK |
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#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_P |
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#endif |
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#ifndef FUNC_NAME |
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#define FUNC_NAME U3memcpy |
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#endif |
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#ifndef PREAMBLE |
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#define PREAMBLE |
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#endif |
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#ifndef XCC |
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#define XCC xcc |
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#endif |
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.register %g2,#scratch |
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.register %g3,#scratch |
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/* Special/non-trivial issues of this code: |
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* |
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* 1) %o5 is preserved from VISEntryHalf to VISExitHalf |
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* 2) Only low 32 FPU registers are used so that only the |
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* lower half of the FPU register set is dirtied by this |
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* code. This is especially important in the kernel. |
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* 3) This code never prefetches cachelines past the end |
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* of the source buffer. |
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*/ |
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.text |
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#ifndef EX_RETVAL |
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#define EX_RETVAL(x) x |
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__restore_fp: |
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VISExitHalf |
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retl |
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nop |
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ENTRY(U3_retl_o2_plus_g2_plus_g1_plus_1_fp) |
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add %g1, 1, %g1 |
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add %g2, %g1, %g2 |
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ba,pt %xcc, __restore_fp |
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add %o2, %g2, %o0 |
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ENDPROC(U3_retl_o2_plus_g2_plus_g1_plus_1_fp) |
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ENTRY(U3_retl_o2_plus_g2_fp) |
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ba,pt %xcc, __restore_fp |
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add %o2, %g2, %o0 |
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ENDPROC(U3_retl_o2_plus_g2_fp) |
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ENTRY(U3_retl_o2_plus_g2_plus_8_fp) |
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add %g2, 8, %g2 |
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ba,pt %xcc, __restore_fp |
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add %o2, %g2, %o0 |
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ENDPROC(U3_retl_o2_plus_g2_plus_8_fp) |
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ENTRY(U3_retl_o2) |
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retl |
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mov %o2, %o0 |
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ENDPROC(U3_retl_o2) |
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ENTRY(U3_retl_o2_plus_1) |
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retl |
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add %o2, 1, %o0 |
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ENDPROC(U3_retl_o2_plus_1) |
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ENTRY(U3_retl_o2_plus_4) |
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retl |
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add %o2, 4, %o0 |
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ENDPROC(U3_retl_o2_plus_4) |
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ENTRY(U3_retl_o2_plus_8) |
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retl |
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add %o2, 8, %o0 |
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ENDPROC(U3_retl_o2_plus_8) |
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ENTRY(U3_retl_o2_plus_g1_plus_1) |
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add %g1, 1, %g1 |
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retl |
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add %o2, %g1, %o0 |
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ENDPROC(U3_retl_o2_plus_g1_plus_1) |
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ENTRY(U3_retl_o2_fp) |
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ba,pt %xcc, __restore_fp |
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mov %o2, %o0 |
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ENDPROC(U3_retl_o2_fp) |
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ENTRY(U3_retl_o2_plus_o3_sll_6_plus_0x80_fp) |
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sll %o3, 6, %o3 |
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add %o3, 0x80, %o3 |
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ba,pt %xcc, __restore_fp |
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add %o2, %o3, %o0 |
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ENDPROC(U3_retl_o2_plus_o3_sll_6_plus_0x80_fp) |
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ENTRY(U3_retl_o2_plus_o3_sll_6_plus_0x40_fp) |
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sll %o3, 6, %o3 |
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add %o3, 0x40, %o3 |
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ba,pt %xcc, __restore_fp |
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add %o2, %o3, %o0 |
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ENDPROC(U3_retl_o2_plus_o3_sll_6_plus_0x40_fp) |
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ENTRY(U3_retl_o2_plus_GS_plus_0x10) |
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add GLOBAL_SPARE, 0x10, GLOBAL_SPARE |
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retl |
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add %o2, GLOBAL_SPARE, %o0 |
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ENDPROC(U3_retl_o2_plus_GS_plus_0x10) |
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ENTRY(U3_retl_o2_plus_GS_plus_0x08) |
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add GLOBAL_SPARE, 0x08, GLOBAL_SPARE |
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retl |
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add %o2, GLOBAL_SPARE, %o0 |
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ENDPROC(U3_retl_o2_plus_GS_plus_0x08) |
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ENTRY(U3_retl_o2_and_7_plus_GS) |
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and %o2, 7, %o2 |
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retl |
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add %o2, GLOBAL_SPARE, %o0 |
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ENDPROC(U3_retl_o2_and_7_plus_GS) |
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ENTRY(U3_retl_o2_and_7_plus_GS_plus_8) |
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add GLOBAL_SPARE, 8, GLOBAL_SPARE |
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and %o2, 7, %o2 |
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retl |
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add %o2, GLOBAL_SPARE, %o0 |
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ENDPROC(U3_retl_o2_and_7_plus_GS_plus_8) |
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#endif |
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.align 64 |
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/* The cheetah's flexible spine, oversized liver, enlarged heart, |
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* slender muscular body, and claws make it the swiftest hunter |
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* in Africa and the fastest animal on land. Can reach speeds |
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* of up to 2.4GB per second. |
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*/ |
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.globl FUNC_NAME |
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.type FUNC_NAME,#function |
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FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */ |
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srlx %o2, 31, %g2 |
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cmp %g2, 0 |
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/* software trap 5 "Range Check" if dst >= 0x80000000 */ |
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tne %xcc, 5 |
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PREAMBLE |
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mov %o0, %o4 |
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/* if len == 0 */ |
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cmp %o2, 0 |
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be,pn %XCC, end_return |
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or %o0, %o1, %o3 |
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/* if len < 16 */ |
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cmp %o2, 16 |
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blu,a,pn %XCC, less_than_16 |
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or %o3, %o2, %o3 |
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/* if len < 192 */ |
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cmp %o2, (3 * 64) |
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blu,pt %XCC, less_than_192 |
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andcc %o3, 0x7, %g0 |
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/* Clobbers o5/g1/g2/g3/g7/icc/xcc. We must preserve |
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* o5 from here until we hit VISExitHalf. |
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*/ |
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VISEntryHalf |
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/* Is 'dst' already aligned on an 64-byte boundary? */ |
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andcc %o0, 0x3f, %g2 |
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be,pt %XCC, 2f |
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/* Compute abs((dst & 0x3f) - 0x40) into %g2. This is the number |
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* of bytes to copy to make 'dst' 64-byte aligned. We pre- |
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* subtract this from 'len'. |
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*/ |
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sub %o0, %o1, GLOBAL_SPARE |
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sub %g2, 0x40, %g2 |
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sub %g0, %g2, %g2 |
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sub %o2, %g2, %o2 |
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andcc %g2, 0x7, %g1 |
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be,pt %icc, 2f |
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and %g2, 0x38, %g2 |
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1: subcc %g1, 0x1, %g1 |
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EX_LD_FP(LOAD(ldub, %o1 + 0x00, %o3), U3_retl_o2_plus_g2_plus_g1_plus_1) |
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EX_ST_FP(STORE(stb, %o3, %o1 + GLOBAL_SPARE), U3_retl_o2_plus_g2_plus_g1_plus_1) |
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bgu,pt %XCC, 1b |
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add %o1, 0x1, %o1 |
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add %o1, GLOBAL_SPARE, %o0 |
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2: cmp %g2, 0x0 |
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and %o1, 0x7, %g1 |
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be,pt %icc, 3f |
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alignaddr %o1, %g0, %o1 |
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EX_LD_FP(LOAD(ldd, %o1, %f4), U3_retl_o2_plus_g2) |
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1: EX_LD_FP(LOAD(ldd, %o1 + 0x8, %f6), U3_retl_o2_plus_g2) |
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add %o1, 0x8, %o1 |
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subcc %g2, 0x8, %g2 |
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faligndata %f4, %f6, %f0 |
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EX_ST_FP(STORE(std, %f0, %o0), U3_retl_o2_plus_g2_plus_8) |
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be,pn %icc, 3f |
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add %o0, 0x8, %o0 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x8, %f4), U3_retl_o2_plus_g2) |
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add %o1, 0x8, %o1 |
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subcc %g2, 0x8, %g2 |
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faligndata %f6, %f4, %f2 |
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EX_ST_FP(STORE(std, %f2, %o0), U3_retl_o2_plus_g2_plus_8) |
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bne,pt %icc, 1b |
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add %o0, 0x8, %o0 |
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3: LOAD(prefetch, %o1 + 0x000, #one_read) |
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LOAD(prefetch, %o1 + 0x040, #one_read) |
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andn %o2, (0x40 - 1), GLOBAL_SPARE |
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LOAD(prefetch, %o1 + 0x080, #one_read) |
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LOAD(prefetch, %o1 + 0x0c0, #one_read) |
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LOAD(prefetch, %o1 + 0x100, #one_read) |
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EX_LD_FP(LOAD(ldd, %o1 + 0x000, %f0), U3_retl_o2) |
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LOAD(prefetch, %o1 + 0x140, #one_read) |
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EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2), U3_retl_o2) |
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LOAD(prefetch, %o1 + 0x180, #one_read) |
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EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4), U3_retl_o2) |
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LOAD(prefetch, %o1 + 0x1c0, #one_read) |
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faligndata %f0, %f2, %f16 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6), U3_retl_o2) |
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faligndata %f2, %f4, %f18 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8), U3_retl_o2) |
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faligndata %f4, %f6, %f20 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10), U3_retl_o2) |
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faligndata %f6, %f8, %f22 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12), U3_retl_o2) |
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faligndata %f8, %f10, %f24 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14), U3_retl_o2) |
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faligndata %f10, %f12, %f26 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0), U3_retl_o2) |
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subcc GLOBAL_SPARE, 0x80, GLOBAL_SPARE |
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add %o1, 0x40, %o1 |
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bgu,pt %XCC, 1f |
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srl GLOBAL_SPARE, 6, %o3 |
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ba,pt %xcc, 2f |
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nop |
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.align 64 |
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1: |
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EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2), U3_retl_o2_plus_o3_sll_6_plus_0x80) |
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faligndata %f12, %f14, %f28 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4), U3_retl_o2_plus_o3_sll_6_plus_0x80) |
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faligndata %f14, %f0, %f30 |
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EX_ST_FP(STORE_BLK(%f16, %o0), U3_retl_o2_plus_o3_sll_6_plus_0x80) |
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EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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faligndata %f0, %f2, %f16 |
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add %o0, 0x40, %o0 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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faligndata %f2, %f4, %f18 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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faligndata %f4, %f6, %f20 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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subcc %o3, 0x01, %o3 |
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faligndata %f6, %f8, %f22 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14), U3_retl_o2_plus_o3_sll_6_plus_0x80) |
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faligndata %f8, %f10, %f24 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0), U3_retl_o2_plus_o3_sll_6_plus_0x80) |
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LOAD(prefetch, %o1 + 0x1c0, #one_read) |
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faligndata %f10, %f12, %f26 |
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bg,pt %XCC, 1b |
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add %o1, 0x40, %o1 |
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/* Finally we copy the last full 64-byte block. */ |
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2: |
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EX_LD_FP(LOAD(ldd, %o1 + 0x008, %f2), U3_retl_o2_plus_o3_sll_6_plus_0x80) |
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faligndata %f12, %f14, %f28 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x010, %f4), U3_retl_o2_plus_o3_sll_6_plus_0x80) |
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faligndata %f14, %f0, %f30 |
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EX_ST_FP(STORE_BLK(%f16, %o0), U3_retl_o2_plus_o3_sll_6_plus_0x80) |
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EX_LD_FP(LOAD(ldd, %o1 + 0x018, %f6), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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faligndata %f0, %f2, %f16 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x020, %f8), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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faligndata %f2, %f4, %f18 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x028, %f10), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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faligndata %f4, %f6, %f20 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x030, %f12), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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faligndata %f6, %f8, %f22 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x038, %f14), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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faligndata %f8, %f10, %f24 |
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cmp %g1, 0 |
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be,pt %XCC, 1f |
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add %o0, 0x40, %o0 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x040, %f0), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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1: faligndata %f10, %f12, %f26 |
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faligndata %f12, %f14, %f28 |
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faligndata %f14, %f0, %f30 |
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EX_ST_FP(STORE_BLK(%f16, %o0), U3_retl_o2_plus_o3_sll_6_plus_0x40) |
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add %o0, 0x40, %o0 |
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add %o1, 0x40, %o1 |
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membar #Sync |
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/* Now we copy the (len modulo 64) bytes at the end. |
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* Note how we borrow the %f0 loaded above. |
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* |
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* Also notice how this code is careful not to perform a |
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* load past the end of the src buffer. |
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*/ |
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and %o2, 0x3f, %o2 |
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andcc %o2, 0x38, %g2 |
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be,pn %XCC, 2f |
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subcc %g2, 0x8, %g2 |
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be,pn %XCC, 2f |
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cmp %g1, 0 |
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sub %o2, %g2, %o2 |
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be,a,pt %XCC, 1f |
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EX_LD_FP(LOAD(ldd, %o1 + 0x00, %f0), U3_retl_o2_plus_g2) |
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1: EX_LD_FP(LOAD(ldd, %o1 + 0x08, %f2), U3_retl_o2_plus_g2) |
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add %o1, 0x8, %o1 |
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subcc %g2, 0x8, %g2 |
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faligndata %f0, %f2, %f8 |
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EX_ST_FP(STORE(std, %f8, %o0), U3_retl_o2_plus_g2_plus_8) |
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be,pn %XCC, 2f |
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add %o0, 0x8, %o0 |
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EX_LD_FP(LOAD(ldd, %o1 + 0x08, %f0), U3_retl_o2_plus_g2) |
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add %o1, 0x8, %o1 |
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subcc %g2, 0x8, %g2 |
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faligndata %f2, %f0, %f8 |
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EX_ST_FP(STORE(std, %f8, %o0), U3_retl_o2_plus_g2_plus_8) |
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bne,pn %XCC, 1b |
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add %o0, 0x8, %o0 |
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/* If anything is left, we copy it one byte at a time. |
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* Note that %g1 is (src & 0x3) saved above before the |
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* alignaddr was performed. |
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*/ |
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2: |
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cmp %o2, 0 |
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add %o1, %g1, %o1 |
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VISExitHalf |
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be,pn %XCC, end_return |
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sub %o0, %o1, %o3 |
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andcc %g1, 0x7, %g0 |
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bne,pn %icc, 90f |
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andcc %o2, 0x8, %g0 |
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be,pt %icc, 1f |
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nop |
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EX_LD(LOAD(ldx, %o1, %o5), U3_retl_o2) |
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EX_ST(STORE(stx, %o5, %o1 + %o3), U3_retl_o2) |
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add %o1, 0x8, %o1 |
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sub %o2, 8, %o2 |
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1: andcc %o2, 0x4, %g0 |
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be,pt %icc, 1f |
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nop |
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EX_LD(LOAD(lduw, %o1, %o5), U3_retl_o2) |
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EX_ST(STORE(stw, %o5, %o1 + %o3), U3_retl_o2) |
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add %o1, 0x4, %o1 |
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sub %o2, 4, %o2 |
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1: andcc %o2, 0x2, %g0 |
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be,pt %icc, 1f |
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nop |
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EX_LD(LOAD(lduh, %o1, %o5), U3_retl_o2) |
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EX_ST(STORE(sth, %o5, %o1 + %o3), U3_retl_o2) |
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add %o1, 0x2, %o1 |
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sub %o2, 2, %o2 |
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1: andcc %o2, 0x1, %g0 |
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be,pt %icc, end_return |
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nop |
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EX_LD(LOAD(ldub, %o1, %o5), U3_retl_o2) |
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ba,pt %xcc, end_return |
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EX_ST(STORE(stb, %o5, %o1 + %o3), U3_retl_o2) |
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.align 64 |
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/* 16 <= len < 192 */ |
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less_than_192: |
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bne,pn %XCC, 75f |
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sub %o0, %o1, %o3 |
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72: |
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andn %o2, 0xf, GLOBAL_SPARE |
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and %o2, 0xf, %o2 |
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1: subcc GLOBAL_SPARE, 0x10, GLOBAL_SPARE |
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EX_LD(LOAD(ldx, %o1 + 0x00, %o5), U3_retl_o2_plus_GS_plus_0x10) |
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EX_LD(LOAD(ldx, %o1 + 0x08, %g1), U3_retl_o2_plus_GS_plus_0x10) |
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EX_ST(STORE(stx, %o5, %o1 + %o3), U3_retl_o2_plus_GS_plus_0x10) |
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add %o1, 0x8, %o1 |
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EX_ST(STORE(stx, %g1, %o1 + %o3), U3_retl_o2_plus_GS_plus_0x08) |
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bgu,pt %XCC, 1b |
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add %o1, 0x8, %o1 |
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73: andcc %o2, 0x8, %g0 |
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be,pt %XCC, 1f |
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nop |
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sub %o2, 0x8, %o2 |
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EX_LD(LOAD(ldx, %o1, %o5), U3_retl_o2_plus_8) |
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EX_ST(STORE(stx, %o5, %o1 + %o3), U3_retl_o2_plus_8) |
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add %o1, 0x8, %o1 |
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1: andcc %o2, 0x4, %g0 |
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be,pt %XCC, 1f |
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nop |
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sub %o2, 0x4, %o2 |
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EX_LD(LOAD(lduw, %o1, %o5), U3_retl_o2_plus_4) |
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EX_ST(STORE(stw, %o5, %o1 + %o3), U3_retl_o2_plus_4) |
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add %o1, 0x4, %o1 |
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1: cmp %o2, 0 |
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be,pt %XCC, end_return |
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nop |
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ba,pt %xcc, 90f |
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nop |
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75: |
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andcc %o0, 0x7, %g1 |
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sub %g1, 0x8, %g1 |
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be,pn %icc, 2f |
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sub %g0, %g1, %g1 |
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sub %o2, %g1, %o2 |
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1: subcc %g1, 1, %g1 |
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EX_LD(LOAD(ldub, %o1, %o5), U3_retl_o2_plus_g1_plus_1) |
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EX_ST(STORE(stb, %o5, %o1 + %o3), U3_retl_o2_plus_g1_plus_1) |
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bgu,pt %icc, 1b |
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add %o1, 1, %o1 |
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2: add %o1, %o3, %o0 |
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andcc %o1, 0x7, %g1 |
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bne,pt %icc, 8f |
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sll %g1, 3, %g1 |
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cmp %o2, 16 |
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bgeu,pt %icc, 72b |
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nop |
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ba,a,pt %xcc, 73b |
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8: mov 64, %o3 |
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andn %o1, 0x7, %o1 |
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EX_LD(LOAD(ldx, %o1, %g2), U3_retl_o2) |
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sub %o3, %g1, %o3 |
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andn %o2, 0x7, GLOBAL_SPARE |
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sllx %g2, %g1, %g2 |
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1: EX_LD(LOAD(ldx, %o1 + 0x8, %g3), U3_retl_o2_and_7_plus_GS) |
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subcc GLOBAL_SPARE, 0x8, GLOBAL_SPARE |
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add %o1, 0x8, %o1 |
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srlx %g3, %o3, %o5 |
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or %o5, %g2, %o5 |
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EX_ST(STORE(stx, %o5, %o0), U3_retl_o2_and_7_plus_GS_plus_8) |
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add %o0, 0x8, %o0 |
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bgu,pt %icc, 1b |
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sllx %g3, %g1, %g2 |
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srl %g1, 3, %g1 |
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andcc %o2, 0x7, %o2 |
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be,pn %icc, end_return |
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add %o1, %g1, %o1 |
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ba,pt %xcc, 90f |
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sub %o0, %o1, %o3 |
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.align 64 |
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/* 0 < len < 16 */ |
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less_than_16: |
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andcc %o3, 0x3, %g0 |
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bne,pn %XCC, 90f |
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sub %o0, %o1, %o3 |
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1: |
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subcc %o2, 4, %o2 |
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EX_LD(LOAD(lduw, %o1, %g1), U3_retl_o2_plus_4) |
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EX_ST(STORE(stw, %g1, %o1 + %o3), U3_retl_o2_plus_4) |
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bgu,pt %XCC, 1b |
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add %o1, 4, %o1 |
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end_return: |
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retl |
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mov EX_RETVAL(%o4), %o0 |
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.align 32 |
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90: |
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subcc %o2, 1, %o2 |
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EX_LD(LOAD(ldub, %o1, %g1), U3_retl_o2_plus_1) |
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EX_ST(STORE(stb, %g1, %o1 + %o3), U3_retl_o2_plus_1) |
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bgu,pt %XCC, 90b |
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add %o1, 1, %o1 |
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retl |
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mov EX_RETVAL(%o4), %o0 |
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.size FUNC_NAME, .-FUNC_NAME
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