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510 lines
13 KiB
510 lines
13 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* NGmemcpy.S: Niagara optimized memcpy. |
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* |
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* Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) |
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*/ |
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#ifdef __KERNEL__ |
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#include <linux/linkage.h> |
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#include <asm/asi.h> |
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#include <asm/thread_info.h> |
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#define GLOBAL_SPARE %g7 |
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#define RESTORE_ASI(TMP) \ |
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ldub [%g6 + TI_CURRENT_DS], TMP; \ |
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wr TMP, 0x0, %asi; |
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#else |
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#define GLOBAL_SPARE %g5 |
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#define RESTORE_ASI(TMP) \ |
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wr %g0, ASI_PNF, %asi |
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#endif |
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#ifdef __sparc_v9__ |
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#define SAVE_AMOUNT 128 |
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#else |
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#define SAVE_AMOUNT 64 |
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#endif |
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#ifndef STORE_ASI |
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#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_P |
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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_ST |
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#define EX_ST(x,y) x |
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#endif |
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#ifndef LOAD |
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#ifndef MEMCPY_DEBUG |
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#define LOAD(type,addr,dest) type [addr], dest |
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#else |
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#define LOAD(type,addr,dest) type##a [addr] 0x80, dest |
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#endif |
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#endif |
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#ifndef LOAD_TWIN |
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#define LOAD_TWIN(addr_reg,dest0,dest1) \ |
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ldda [addr_reg] ASI_BLK_INIT_QUAD_LDD_P, dest0 |
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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_INIT |
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#ifndef SIMULATE_NIAGARA_ON_NON_NIAGARA |
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#define STORE_INIT(src,addr) stxa src, [addr] %asi |
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#else |
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#define STORE_INIT(src,addr) stx src, [addr + 0x00] |
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#endif |
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#endif |
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#ifndef FUNC_NAME |
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#define FUNC_NAME NGmemcpy |
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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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.text |
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#ifndef EX_RETVAL |
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#define EX_RETVAL(x) x |
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__restore_asi: |
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ret |
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wr %g0, ASI_AIUS, %asi |
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restore |
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ENTRY(NG_ret_i2_plus_i4_plus_1) |
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ba,pt %xcc, __restore_asi |
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add %i2, %i5, %i0 |
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ENDPROC(NG_ret_i2_plus_i4_plus_1) |
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ENTRY(NG_ret_i2_plus_g1) |
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ba,pt %xcc, __restore_asi |
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add %i2, %g1, %i0 |
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ENDPROC(NG_ret_i2_plus_g1) |
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ENTRY(NG_ret_i2_plus_g1_minus_8) |
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sub %g1, 8, %g1 |
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ba,pt %xcc, __restore_asi |
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add %i2, %g1, %i0 |
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ENDPROC(NG_ret_i2_plus_g1_minus_8) |
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ENTRY(NG_ret_i2_plus_g1_minus_16) |
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sub %g1, 16, %g1 |
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ba,pt %xcc, __restore_asi |
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add %i2, %g1, %i0 |
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ENDPROC(NG_ret_i2_plus_g1_minus_16) |
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ENTRY(NG_ret_i2_plus_g1_minus_24) |
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sub %g1, 24, %g1 |
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ba,pt %xcc, __restore_asi |
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add %i2, %g1, %i0 |
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ENDPROC(NG_ret_i2_plus_g1_minus_24) |
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ENTRY(NG_ret_i2_plus_g1_minus_32) |
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sub %g1, 32, %g1 |
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ba,pt %xcc, __restore_asi |
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add %i2, %g1, %i0 |
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ENDPROC(NG_ret_i2_plus_g1_minus_32) |
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ENTRY(NG_ret_i2_plus_g1_minus_40) |
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sub %g1, 40, %g1 |
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ba,pt %xcc, __restore_asi |
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add %i2, %g1, %i0 |
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ENDPROC(NG_ret_i2_plus_g1_minus_40) |
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ENTRY(NG_ret_i2_plus_g1_minus_48) |
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sub %g1, 48, %g1 |
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ba,pt %xcc, __restore_asi |
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add %i2, %g1, %i0 |
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ENDPROC(NG_ret_i2_plus_g1_minus_48) |
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ENTRY(NG_ret_i2_plus_g1_minus_56) |
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sub %g1, 56, %g1 |
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ba,pt %xcc, __restore_asi |
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add %i2, %g1, %i0 |
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ENDPROC(NG_ret_i2_plus_g1_minus_56) |
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ENTRY(NG_ret_i2_plus_i4) |
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ba,pt %xcc, __restore_asi |
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add %i2, %i4, %i0 |
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ENDPROC(NG_ret_i2_plus_i4) |
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ENTRY(NG_ret_i2_plus_i4_minus_8) |
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sub %i4, 8, %i4 |
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ba,pt %xcc, __restore_asi |
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add %i2, %i4, %i0 |
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ENDPROC(NG_ret_i2_plus_i4_minus_8) |
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ENTRY(NG_ret_i2_plus_8) |
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ba,pt %xcc, __restore_asi |
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add %i2, 8, %i0 |
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ENDPROC(NG_ret_i2_plus_8) |
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ENTRY(NG_ret_i2_plus_4) |
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ba,pt %xcc, __restore_asi |
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add %i2, 4, %i0 |
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ENDPROC(NG_ret_i2_plus_4) |
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ENTRY(NG_ret_i2_plus_1) |
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ba,pt %xcc, __restore_asi |
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add %i2, 1, %i0 |
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ENDPROC(NG_ret_i2_plus_1) |
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ENTRY(NG_ret_i2_plus_g1_plus_1) |
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add %g1, 1, %g1 |
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ba,pt %xcc, __restore_asi |
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add %i2, %g1, %i0 |
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ENDPROC(NG_ret_i2_plus_g1_plus_1) |
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ENTRY(NG_ret_i2) |
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ba,pt %xcc, __restore_asi |
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mov %i2, %i0 |
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ENDPROC(NG_ret_i2) |
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ENTRY(NG_ret_i2_and_7_plus_i4) |
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and %i2, 7, %i2 |
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ba,pt %xcc, __restore_asi |
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add %i2, %i4, %i0 |
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ENDPROC(NG_ret_i2_and_7_plus_i4) |
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#endif |
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.align 64 |
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.globl FUNC_NAME |
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.type FUNC_NAME,#function |
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FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */ |
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PREAMBLE |
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save %sp, -SAVE_AMOUNT, %sp |
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srlx %i2, 31, %g2 |
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cmp %g2, 0 |
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tne %xcc, 5 |
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mov %i0, %o0 |
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cmp %i2, 0 |
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be,pn %XCC, 85f |
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or %o0, %i1, %i3 |
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cmp %i2, 16 |
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blu,a,pn %XCC, 80f |
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or %i3, %i2, %i3 |
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/* 2 blocks (128 bytes) is the minimum we can do the block |
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* copy with. We need to ensure that we'll iterate at least |
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* once in the block copy loop. At worst we'll need to align |
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* the destination to a 64-byte boundary which can chew up |
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* to (64 - 1) bytes from the length before we perform the |
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* block copy loop. |
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*/ |
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cmp %i2, (2 * 64) |
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blu,pt %XCC, 70f |
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andcc %i3, 0x7, %g0 |
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/* %o0: dst |
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* %i1: src |
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* %i2: len (known to be >= 128) |
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* |
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* The block copy loops will use %i4/%i5,%g2/%g3 as |
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* temporaries while copying the data. |
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*/ |
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LOAD(prefetch, %i1, #one_read) |
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wr %g0, STORE_ASI, %asi |
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/* Align destination on 64-byte boundary. */ |
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andcc %o0, (64 - 1), %i4 |
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be,pt %XCC, 2f |
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sub %i4, 64, %i4 |
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sub %g0, %i4, %i4 ! bytes to align dst |
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sub %i2, %i4, %i2 |
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1: subcc %i4, 1, %i4 |
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EX_LD(LOAD(ldub, %i1, %g1), NG_ret_i2_plus_i4_plus_1) |
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EX_ST(STORE(stb, %g1, %o0), NG_ret_i2_plus_i4_plus_1) |
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add %i1, 1, %i1 |
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bne,pt %XCC, 1b |
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add %o0, 1, %o0 |
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/* If the source is on a 16-byte boundary we can do |
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* the direct block copy loop. If it is 8-byte aligned |
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* we can do the 16-byte loads offset by -8 bytes and the |
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* init stores offset by one register. |
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* |
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* If the source is not even 8-byte aligned, we need to do |
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* shifting and masking (basically integer faligndata). |
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* |
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* The careful bit with init stores is that if we store |
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* to any part of the cache line we have to store the whole |
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* cacheline else we can end up with corrupt L2 cache line |
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* contents. Since the loop works on 64-bytes of 64-byte |
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* aligned store data at a time, this is easy to ensure. |
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*/ |
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2: |
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andcc %i1, (16 - 1), %i4 |
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andn %i2, (64 - 1), %g1 ! block copy loop iterator |
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be,pt %XCC, 50f |
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sub %i2, %g1, %i2 ! final sub-block copy bytes |
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cmp %i4, 8 |
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be,pt %XCC, 10f |
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sub %i1, %i4, %i1 |
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/* Neither 8-byte nor 16-byte aligned, shift and mask. */ |
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and %i4, 0x7, GLOBAL_SPARE |
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sll GLOBAL_SPARE, 3, GLOBAL_SPARE |
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mov 64, %i5 |
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EX_LD(LOAD_TWIN(%i1, %g2, %g3), NG_ret_i2_plus_g1) |
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sub %i5, GLOBAL_SPARE, %i5 |
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mov 16, %o4 |
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mov 32, %o5 |
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mov 48, %o7 |
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mov 64, %i3 |
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bg,pn %XCC, 9f |
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nop |
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#define MIX_THREE_WORDS(WORD1, WORD2, WORD3, PRE_SHIFT, POST_SHIFT, TMP) \ |
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sllx WORD1, POST_SHIFT, WORD1; \ |
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srlx WORD2, PRE_SHIFT, TMP; \ |
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sllx WORD2, POST_SHIFT, WORD2; \ |
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or WORD1, TMP, WORD1; \ |
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srlx WORD3, PRE_SHIFT, TMP; \ |
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or WORD2, TMP, WORD2; |
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8: EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3), NG_ret_i2_plus_g1) |
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MIX_THREE_WORDS(%g2, %g3, %o2, %i5, GLOBAL_SPARE, %o1) |
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LOAD(prefetch, %i1 + %i3, #one_read) |
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EX_ST(STORE_INIT(%g2, %o0 + 0x00), NG_ret_i2_plus_g1) |
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EX_ST(STORE_INIT(%g3, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8) |
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EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3), NG_ret_i2_plus_g1_minus_16) |
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MIX_THREE_WORDS(%o2, %o3, %g2, %i5, GLOBAL_SPARE, %o1) |
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EX_ST(STORE_INIT(%o2, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16) |
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EX_ST(STORE_INIT(%o3, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24) |
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EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1_minus_32) |
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MIX_THREE_WORDS(%g2, %g3, %o2, %i5, GLOBAL_SPARE, %o1) |
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EX_ST(STORE_INIT(%g2, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32) |
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EX_ST(STORE_INIT(%g3, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40) |
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EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3), NG_ret_i2_plus_g1_minus_48) |
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add %i1, 64, %i1 |
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MIX_THREE_WORDS(%o2, %o3, %g2, %i5, GLOBAL_SPARE, %o1) |
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EX_ST(STORE_INIT(%o2, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48) |
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EX_ST(STORE_INIT(%o3, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56) |
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subcc %g1, 64, %g1 |
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bne,pt %XCC, 8b |
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add %o0, 64, %o0 |
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ba,pt %XCC, 60f |
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add %i1, %i4, %i1 |
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9: EX_LD(LOAD_TWIN(%i1 + %o4, %o2, %o3), NG_ret_i2_plus_g1) |
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MIX_THREE_WORDS(%g3, %o2, %o3, %i5, GLOBAL_SPARE, %o1) |
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LOAD(prefetch, %i1 + %i3, #one_read) |
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EX_ST(STORE_INIT(%g3, %o0 + 0x00), NG_ret_i2_plus_g1) |
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EX_ST(STORE_INIT(%o2, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8) |
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EX_LD(LOAD_TWIN(%i1 + %o5, %g2, %g3), NG_ret_i2_plus_g1_minus_16) |
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MIX_THREE_WORDS(%o3, %g2, %g3, %i5, GLOBAL_SPARE, %o1) |
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EX_ST(STORE_INIT(%o3, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16) |
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EX_ST(STORE_INIT(%g2, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24) |
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EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1_minus_32) |
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MIX_THREE_WORDS(%g3, %o2, %o3, %i5, GLOBAL_SPARE, %o1) |
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EX_ST(STORE_INIT(%g3, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32) |
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EX_ST(STORE_INIT(%o2, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40) |
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EX_LD(LOAD_TWIN(%i1 + %i3, %g2, %g3), NG_ret_i2_plus_g1_minus_48) |
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add %i1, 64, %i1 |
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MIX_THREE_WORDS(%o3, %g2, %g3, %i5, GLOBAL_SPARE, %o1) |
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EX_ST(STORE_INIT(%o3, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48) |
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EX_ST(STORE_INIT(%g2, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56) |
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subcc %g1, 64, %g1 |
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bne,pt %XCC, 9b |
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add %o0, 64, %o0 |
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ba,pt %XCC, 60f |
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add %i1, %i4, %i1 |
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10: /* Destination is 64-byte aligned, source was only 8-byte |
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* aligned but it has been subtracted by 8 and we perform |
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* one twin load ahead, then add 8 back into source when |
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* we finish the loop. |
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*/ |
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EX_LD(LOAD_TWIN(%i1, %o4, %o5), NG_ret_i2_plus_g1) |
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mov 16, %o7 |
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mov 32, %g2 |
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mov 48, %g3 |
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mov 64, %o1 |
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1: EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1) |
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LOAD(prefetch, %i1 + %o1, #one_read) |
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EX_ST(STORE_INIT(%o5, %o0 + 0x00), NG_ret_i2_plus_g1) ! initializes cache line |
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EX_ST(STORE_INIT(%o2, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8) |
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EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5), NG_ret_i2_plus_g1_minus_16) |
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EX_ST(STORE_INIT(%o3, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16) |
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EX_ST(STORE_INIT(%o4, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24) |
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EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3), NG_ret_i2_plus_g1_minus_32) |
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EX_ST(STORE_INIT(%o5, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32) |
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EX_ST(STORE_INIT(%o2, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40) |
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EX_LD(LOAD_TWIN(%i1 + %o1, %o4, %o5), NG_ret_i2_plus_g1_minus_48) |
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add %i1, 64, %i1 |
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EX_ST(STORE_INIT(%o3, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48) |
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EX_ST(STORE_INIT(%o4, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56) |
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subcc %g1, 64, %g1 |
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bne,pt %XCC, 1b |
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add %o0, 64, %o0 |
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ba,pt %XCC, 60f |
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add %i1, 0x8, %i1 |
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50: /* Destination is 64-byte aligned, and source is 16-byte |
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* aligned. |
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*/ |
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mov 16, %o7 |
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mov 32, %g2 |
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mov 48, %g3 |
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mov 64, %o1 |
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1: EX_LD(LOAD_TWIN(%i1 + %g0, %o4, %o5), NG_ret_i2_plus_g1) |
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EX_LD(LOAD_TWIN(%i1 + %o7, %o2, %o3), NG_ret_i2_plus_g1) |
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LOAD(prefetch, %i1 + %o1, #one_read) |
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EX_ST(STORE_INIT(%o4, %o0 + 0x00), NG_ret_i2_plus_g1) ! initializes cache line |
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EX_ST(STORE_INIT(%o5, %o0 + 0x08), NG_ret_i2_plus_g1_minus_8) |
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EX_LD(LOAD_TWIN(%i1 + %g2, %o4, %o5), NG_ret_i2_plus_g1_minus_16) |
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EX_ST(STORE_INIT(%o2, %o0 + 0x10), NG_ret_i2_plus_g1_minus_16) |
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EX_ST(STORE_INIT(%o3, %o0 + 0x18), NG_ret_i2_plus_g1_minus_24) |
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EX_LD(LOAD_TWIN(%i1 + %g3, %o2, %o3), NG_ret_i2_plus_g1_minus_32) |
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add %i1, 64, %i1 |
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EX_ST(STORE_INIT(%o4, %o0 + 0x20), NG_ret_i2_plus_g1_minus_32) |
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EX_ST(STORE_INIT(%o5, %o0 + 0x28), NG_ret_i2_plus_g1_minus_40) |
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EX_ST(STORE_INIT(%o2, %o0 + 0x30), NG_ret_i2_plus_g1_minus_48) |
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EX_ST(STORE_INIT(%o3, %o0 + 0x38), NG_ret_i2_plus_g1_minus_56) |
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subcc %g1, 64, %g1 |
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bne,pt %XCC, 1b |
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add %o0, 64, %o0 |
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/* fall through */ |
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60: |
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membar #Sync |
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/* %i2 contains any final bytes still needed to be copied |
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* over. If anything is left, we copy it one byte at a time. |
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*/ |
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RESTORE_ASI(%i3) |
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brz,pt %i2, 85f |
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sub %o0, %i1, %i3 |
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ba,a,pt %XCC, 90f |
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nop |
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.align 64 |
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70: /* 16 < len <= 64 */ |
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bne,pn %XCC, 75f |
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sub %o0, %i1, %i3 |
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72: |
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andn %i2, 0xf, %i4 |
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and %i2, 0xf, %i2 |
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1: subcc %i4, 0x10, %i4 |
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EX_LD(LOAD(ldx, %i1, %o4), NG_ret_i2_plus_i4) |
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add %i1, 0x08, %i1 |
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EX_LD(LOAD(ldx, %i1, %g1), NG_ret_i2_plus_i4) |
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sub %i1, 0x08, %i1 |
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EX_ST(STORE(stx, %o4, %i1 + %i3), NG_ret_i2_plus_i4) |
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add %i1, 0x8, %i1 |
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EX_ST(STORE(stx, %g1, %i1 + %i3), NG_ret_i2_plus_i4_minus_8) |
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bgu,pt %XCC, 1b |
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add %i1, 0x8, %i1 |
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73: andcc %i2, 0x8, %g0 |
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be,pt %XCC, 1f |
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nop |
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sub %i2, 0x8, %i2 |
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EX_LD(LOAD(ldx, %i1, %o4), NG_ret_i2_plus_8) |
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EX_ST(STORE(stx, %o4, %i1 + %i3), NG_ret_i2_plus_8) |
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add %i1, 0x8, %i1 |
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1: andcc %i2, 0x4, %g0 |
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be,pt %XCC, 1f |
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nop |
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sub %i2, 0x4, %i2 |
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EX_LD(LOAD(lduw, %i1, %i5), NG_ret_i2_plus_4) |
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EX_ST(STORE(stw, %i5, %i1 + %i3), NG_ret_i2_plus_4) |
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add %i1, 0x4, %i1 |
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1: cmp %i2, 0 |
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be,pt %XCC, 85f |
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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 %i2, %g1, %i2 |
|
|
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1: subcc %g1, 1, %g1 |
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EX_LD(LOAD(ldub, %i1, %i5), NG_ret_i2_plus_g1_plus_1) |
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EX_ST(STORE(stb, %i5, %i1 + %i3), NG_ret_i2_plus_g1_plus_1) |
|
bgu,pt %icc, 1b |
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add %i1, 1, %i1 |
|
|
|
2: add %i1, %i3, %o0 |
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andcc %i1, 0x7, %g1 |
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bne,pt %icc, 8f |
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sll %g1, 3, %g1 |
|
|
|
cmp %i2, 16 |
|
bgeu,pt %icc, 72b |
|
nop |
|
ba,a,pt %xcc, 73b |
|
|
|
8: mov 64, %i3 |
|
andn %i1, 0x7, %i1 |
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EX_LD(LOAD(ldx, %i1, %g2), NG_ret_i2) |
|
sub %i3, %g1, %i3 |
|
andn %i2, 0x7, %i4 |
|
sllx %g2, %g1, %g2 |
|
1: add %i1, 0x8, %i1 |
|
EX_LD(LOAD(ldx, %i1, %g3), NG_ret_i2_and_7_plus_i4) |
|
subcc %i4, 0x8, %i4 |
|
srlx %g3, %i3, %i5 |
|
or %i5, %g2, %i5 |
|
EX_ST(STORE(stx, %i5, %o0), NG_ret_i2_and_7_plus_i4) |
|
add %o0, 0x8, %o0 |
|
bgu,pt %icc, 1b |
|
sllx %g3, %g1, %g2 |
|
|
|
srl %g1, 3, %g1 |
|
andcc %i2, 0x7, %i2 |
|
be,pn %icc, 85f |
|
add %i1, %g1, %i1 |
|
ba,pt %xcc, 90f |
|
sub %o0, %i1, %i3 |
|
|
|
.align 64 |
|
80: /* 0 < len <= 16 */ |
|
andcc %i3, 0x3, %g0 |
|
bne,pn %XCC, 90f |
|
sub %o0, %i1, %i3 |
|
|
|
1: |
|
subcc %i2, 4, %i2 |
|
EX_LD(LOAD(lduw, %i1, %g1), NG_ret_i2_plus_4) |
|
EX_ST(STORE(stw, %g1, %i1 + %i3), NG_ret_i2_plus_4) |
|
bgu,pt %XCC, 1b |
|
add %i1, 4, %i1 |
|
|
|
85: ret |
|
restore EX_RETVAL(%i0), %g0, %o0 |
|
|
|
.align 32 |
|
90: |
|
subcc %i2, 1, %i2 |
|
EX_LD(LOAD(ldub, %i1, %g1), NG_ret_i2_plus_1) |
|
EX_ST(STORE(stb, %g1, %i1 + %i3), NG_ret_i2_plus_1) |
|
bgu,pt %XCC, 90b |
|
add %i1, 1, %i1 |
|
ret |
|
restore EX_RETVAL(%i0), %g0, %o0 |
|
|
|
.size FUNC_NAME, .-FUNC_NAME
|
|
|