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Diffstat (limited to 'libcutils/tests/memset_mips/memset_cmips.S')
| -rw-r--r-- | libcutils/tests/memset_mips/memset_cmips.S | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/libcutils/tests/memset_mips/memset_cmips.S b/libcutils/tests/memset_mips/memset_cmips.S deleted file mode 100644 index f8f3a91..0000000 --- a/libcutils/tests/memset_mips/memset_cmips.S +++ /dev/null @@ -1,227 +0,0 @@ -/* - * Copyright (c) 2009 - * MIPS Technologies, Inc., California. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/************************************************************************ - * - * memset.S, version "64h" with 1 cache line horizon for "pref 30" and 14 nops - * Version: "043009" - * - ************************************************************************/ - - -/************************************************************************ - * Include files - ************************************************************************/ - -#include "machine/asm.h" - -/* - * This routine could be optimized for MIPS64. The current code only - * uses MIPS32 instructions. - */ - -#if defined(__MIPSEB__) -# define SWHI swl /* high part is left in big-endian */ -#endif - -#if defined(__MIPSEL__) -# define SWHI swr /* high part is right in little-endian */ -#endif - -#if !(defined(XGPROF) || defined(XPROF)) -#undef SETUP_GP -#define SETUP_GP -#endif - -LEAF(memset_cmips,0) - - .set noreorder - .set noat - - addu t0,a0,a2 # t0 is the "past the end" address - slti AT,a2,4 # is a2 less than 4? - bne AT,zero,.Llast4 # if yes, go to last4 - move v0,a0 # memset returns the dst pointer - - beq a1,zero,.Lset0 - subu v1,zero,a0 - - # smear byte into 32 bit word -#if (__mips==32) && (__mips_isa_rev>=2) - ins a1, a1, 8, 8 # Replicate fill byte into half-word. - ins a1, a1, 16, 16 # Replicate fill byte into word. -#else - and a1,0xff - sll AT,a1,8 - or a1,AT - sll AT,a1,16 - or a1,AT -#endif - -.Lset0: andi v1,v1,0x3 # word-unaligned address? - beq v1,zero,.Laligned # v1 is the unalignment count - subu a2,a2,v1 - SWHI a1,0(a0) - addu a0,a0,v1 - -# Here we have the "word-aligned" a0 (until the "last4") -.Laligned: - andi t8,a2,0x3f # any 64-byte chunks? - # t8 is the byte count past 64-byte chunks - beq a2,t8,.Lchk8w # when a2==t8, no 64-byte chunks - # There will be at most 1 32-byte chunk then - subu a3,a2,t8 # subtract from a2 the reminder - # Here a3 counts bytes in 16w chunks - addu a3,a0,a3 # Now a3 is the final dst after 64-byte chunks - -# Find out, if there are any 64-byte chunks after which will be still at least -# 96 bytes left. The value "96" is calculated as needed buffer for -# "pref 30,64(a0)" prefetch, which can be used as "pref 30,0(a0)" after -# incrementing "a0" by 64. -# For "a2" below 160 there will be no such "pref 30 safe" 64-byte chunk. -# - sltiu v1,a2,160 - bgtz v1,.Lloop16w_nopref30 # skip "pref 30,0(a0)" - subu t7,a2,96 # subtract "pref 30 unsafe" region - # below we have at least 1 64-byte chunk which is "pref 30 safe" - andi t6,t7,0x3f # t6 is past "64-byte safe chunks" reminder - subu t5,t7,t6 # subtract from t7 the reminder - # Here t5 counts bytes in 16w "safe" chunks - addu t4,a0,t5 # Now t4 is the dst after 64-byte "safe" chunks - -# Don't use "pref 30,0(a0)" for a0 in a "middle" of a cache line -# pref 30,0(a0) -# Here we are in the region, where it is safe to use "pref 30,64(a0)" -.Lloop16w: - addiu a0,a0,64 - pref 30,-32(a0) # continue setting up the dest, addr 64-32 - sw a1,-64(a0) - sw a1,-60(a0) - sw a1,-56(a0) - sw a1,-52(a0) - sw a1,-48(a0) - sw a1,-44(a0) - sw a1,-40(a0) - sw a1,-36(a0) - nop - nop # the extra nop instructions help to balance - nop # cycles needed for "store" + "fill" + "evict" - nop # For 64byte store there are needed 8 fill - nop # and 8 evict cycles, i.e. at least 32 instr. - nop - nop - pref 30,0(a0) # continue setting up the dest, addr 64-0 - sw a1,-32(a0) - sw a1,-28(a0) - sw a1,-24(a0) - sw a1,-20(a0) - sw a1,-16(a0) - sw a1,-12(a0) - sw a1,-8(a0) - sw a1,-4(a0) - nop - nop - nop - nop # NOTE: adding 14 nop-s instead of 12 nop-s - nop # gives better results for "fast" memory - nop - bne a0,t4,.Lloop16w - nop - - beq a0,a3,.Lchk8w # maybe no more 64-byte chunks? - nop # this "delayed slot" is useless ... - -.Lloop16w_nopref30: # there could be up to 3 "64-byte nopref30" chunks - addiu a0,a0,64 - sw a1,-64(a0) - sw a1,-60(a0) - sw a1,-56(a0) - sw a1,-52(a0) - sw a1,-48(a0) - sw a1,-44(a0) - sw a1,-40(a0) - sw a1,-36(a0) - sw a1,-32(a0) - sw a1,-28(a0) - sw a1,-24(a0) - sw a1,-20(a0) - sw a1,-16(a0) - sw a1,-12(a0) - sw a1,-8(a0) - bne a0,a3,.Lloop16w_nopref30 - sw a1,-4(a0) - -.Lchk8w: # t8 here is the byte count past 64-byte chunks - - andi t7,t8,0x1f # is there a 32-byte chunk? - # the t7 is the reminder count past 32-bytes - beq t8,t7,.Lchk1w # when t8==t7, no 32-byte chunk - move a2,t7 - - sw a1,0(a0) - sw a1,4(a0) - sw a1,8(a0) - sw a1,12(a0) - sw a1,16(a0) - sw a1,20(a0) - sw a1,24(a0) - sw a1,28(a0) - addiu a0,a0,32 - -.Lchk1w: - andi t8,a2,0x3 # now t8 is the reminder past 1w chunks - beq a2,t8,.Llast4 - subu a3,a2,t8 # a3 is the count of bytes in 1w chunks - addu a3,a0,a3 # now a3 is the dst address past the 1w chunks - -# copying in words (4-byte chunks) -.LwordCopy_loop: - addiu a0,a0,4 - bne a0,a3,.LwordCopy_loop - sw a1,-4(a0) - -.Llast4:beq a0,t0,.Llast4e -.Llast4l:addiu a0,a0,1 - bne a0,t0,.Llast4l - sb a1,-1(a0) - -.Llast4e: - j ra - nop - - .set at - .set reorder - -END(memset_cmips) - - -/************************************************************************ - * Implementation : Static functions - ************************************************************************/ - |