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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 /*
     17  * Contributed by: Intel Corporation
     18  */
     19 
     20 #include "cache.h"
     21 
     22 #ifndef L
     23 # define L(label)	.L##label
     24 #endif
     25 
     26 #ifndef ALIGN
     27 # define ALIGN(n)	.p2align n
     28 #endif
     29 
     30 #ifndef cfi_startproc
     31 # define cfi_startproc			.cfi_startproc
     32 #endif
     33 
     34 #ifndef cfi_endproc
     35 # define cfi_endproc			.cfi_endproc
     36 #endif
     37 
     38 #ifndef ENTRY
     39 # define ENTRY(name)			\
     40 	.type name,  @function; 	\
     41 	.globl name;			\
     42 	.p2align 4;			\
     43 name:					\
     44 	cfi_startproc
     45 #endif
     46 
     47 #ifndef END
     48 # define END(name)			\
     49 	cfi_endproc;			\
     50 	.size name, .-name
     51 #endif
     52 
     53 #define JMPTBL(I, B)	I - B
     54 
     55 /* Branch to an entry in a jump table.  TABLE is a jump table with
     56    relative offsets.  INDEX is a register contains the index into the
     57    jump table.  SCALE is the scale of INDEX.  */
     58 #define BRANCH_TO_JMPTBL_ENTRY(TABLE, INDEX, SCALE) \
     59 	lea    TABLE(%rip), %r11;						\
     60 	movslq (%r11, INDEX, SCALE), INDEX;				\
     61 	lea    (%r11, INDEX), INDEX;					\
     62 	jmp    *INDEX
     63 
     64 	.section .text.sse2,"ax",@progbits
     65 	ALIGN (4)
     66 ENTRY (android_memset32)	// Address in rdi
     67 	shr    $2, %rdx			// Count in rdx
     68 	movl   %esi, %ecx		// Pattern in ecx
     69 
     70 	cmp    $16, %rdx
     71 	jae    L(16dbwordsormore)
     72 
     73 L(write_less16dbwords):
     74 	lea    (%rdi, %rdx, 4), %rdi
     75 	BRANCH_TO_JMPTBL_ENTRY (L(table_less16dbwords), %rdx, 4)
     76 
     77 	.pushsection .rodata.sse2,"a",@progbits
     78 	ALIGN (2)
     79 L(table_less16dbwords):
     80 	.int	JMPTBL (L(write_0dbwords), L(table_less16dbwords))
     81 	.int	JMPTBL (L(write_1dbwords), L(table_less16dbwords))
     82 	.int	JMPTBL (L(write_2dbwords), L(table_less16dbwords))
     83 	.int	JMPTBL (L(write_3dbwords), L(table_less16dbwords))
     84 	.int	JMPTBL (L(write_4dbwords), L(table_less16dbwords))
     85 	.int	JMPTBL (L(write_5dbwords), L(table_less16dbwords))
     86 	.int	JMPTBL (L(write_6dbwords), L(table_less16dbwords))
     87 	.int	JMPTBL (L(write_7dbwords), L(table_less16dbwords))
     88 	.int	JMPTBL (L(write_8dbwords), L(table_less16dbwords))
     89 	.int	JMPTBL (L(write_9dbwords), L(table_less16dbwords))
     90 	.int	JMPTBL (L(write_10dbwords), L(table_less16dbwords))
     91 	.int	JMPTBL (L(write_11dbwords), L(table_less16dbwords))
     92 	.int	JMPTBL (L(write_12dbwords), L(table_less16dbwords))
     93 	.int	JMPTBL (L(write_13dbwords), L(table_less16dbwords))
     94 	.int	JMPTBL (L(write_14dbwords), L(table_less16dbwords))
     95 	.int	JMPTBL (L(write_15dbwords), L(table_less16dbwords))
     96 	.popsection
     97 
     98 	ALIGN (4)
     99 L(write_15dbwords):
    100 	movl   %ecx, -60(%rdi)
    101 L(write_14dbwords):
    102 	movl   %ecx, -56(%rdi)
    103 L(write_13dbwords):
    104 	movl   %ecx, -52(%rdi)
    105 L(write_12dbwords):
    106 	movl   %ecx, -48(%rdi)
    107 L(write_11dbwords):
    108 	movl   %ecx, -44(%rdi)
    109 L(write_10dbwords):
    110 	movl   %ecx, -40(%rdi)
    111 L(write_9dbwords):
    112 	movl   %ecx, -36(%rdi)
    113 L(write_8dbwords):
    114 	movl   %ecx, -32(%rdi)
    115 L(write_7dbwords):
    116 	movl   %ecx, -28(%rdi)
    117 L(write_6dbwords):
    118 	movl   %ecx, -24(%rdi)
    119 L(write_5dbwords):
    120 	movl   %ecx, -20(%rdi)
    121 L(write_4dbwords):
    122 	movl   %ecx, -16(%rdi)
    123 L(write_3dbwords):
    124 	movl   %ecx, -12(%rdi)
    125 L(write_2dbwords):
    126 	movl   %ecx, -8(%rdi)
    127 L(write_1dbwords):
    128 	movl   %ecx, -4(%rdi)
    129 L(write_0dbwords):
    130 	ret
    131 
    132 	ALIGN (4)
    133 L(16dbwordsormore):
    134 	test   $3, %edi
    135 	jz     L(aligned4bytes)
    136 	mov    %ecx, (%rdi)
    137 	mov    %ecx, -4(%rdi, %rdx, 4)
    138 	sub    $1, %rdx
    139 	rol    $24, %ecx
    140 	add    $1, %rdi
    141 	test   $3, %edi
    142 	jz     L(aligned4bytes)
    143 	ror    $8, %ecx
    144 	add    $1, %rdi
    145 	test   $3, %edi
    146 	jz     L(aligned4bytes)
    147 	ror    $8, %ecx
    148 	add    $1, %rdi
    149 L(aligned4bytes):
    150 	shl    $2, %rdx
    151 
    152 	/* Fill xmm0 with the pattern.  */
    153 	movd   %ecx, %xmm0
    154 	pshufd $0, %xmm0, %xmm0
    155 
    156 	testl  $0xf, %edi
    157 	jz     L(aligned_16)
    158 /* RDX > 32 and RDI is not 16 byte aligned.  */
    159 	movdqu %xmm0, (%rdi)
    160 	mov    %rdi, %rsi
    161 	and    $-16, %rdi
    162 	add    $16, %rdi
    163 	sub    %rdi, %rsi
    164 	add    %rsi, %rdx
    165 
    166 	ALIGN (4)
    167 L(aligned_16):
    168 	cmp    $128, %rdx
    169 	jge    L(128bytesormore)
    170 
    171 L(aligned_16_less128bytes):
    172 	add    %rdx, %rdi
    173 	shr    $2, %rdx
    174 	BRANCH_TO_JMPTBL_ENTRY (L(table_16_128bytes), %rdx, 4)
    175 
    176 	ALIGN (4)
    177 L(128bytesormore):
    178 	cmp    $SHARED_CACHE_SIZE, %rdx
    179 	jg     L(128bytesormore_nt)
    180 
    181 L(128bytesormore_normal):
    182 	sub    $128, %rdx
    183 	movdqa %xmm0, (%rdi)
    184 	movdqa %xmm0, 0x10(%rdi)
    185 	movdqa %xmm0, 0x20(%rdi)
    186 	movdqa %xmm0, 0x30(%rdi)
    187 	movdqa %xmm0, 0x40(%rdi)
    188 	movdqa %xmm0, 0x50(%rdi)
    189 	movdqa %xmm0, 0x60(%rdi)
    190 	movdqa %xmm0, 0x70(%rdi)
    191 	lea    128(%rdi), %rdi
    192 	cmp    $128, %rdx
    193 	jl     L(128bytesless_normal)
    194 
    195 	sub    $128, %rdx
    196 	movdqa %xmm0, (%rdi)
    197 	movdqa %xmm0, 0x10(%rdi)
    198 	movdqa %xmm0, 0x20(%rdi)
    199 	movdqa %xmm0, 0x30(%rdi)
    200 	movdqa %xmm0, 0x40(%rdi)
    201 	movdqa %xmm0, 0x50(%rdi)
    202 	movdqa %xmm0, 0x60(%rdi)
    203 	movdqa %xmm0, 0x70(%rdi)
    204 	lea    128(%rdi), %rdi
    205 	cmp    $128, %rdx
    206 	jl     L(128bytesless_normal)
    207 
    208 	sub    $128, %rdx
    209 	movdqa %xmm0, (%rdi)
    210 	movdqa %xmm0, 0x10(%rdi)
    211 	movdqa %xmm0, 0x20(%rdi)
    212 	movdqa %xmm0, 0x30(%rdi)
    213 	movdqa %xmm0, 0x40(%rdi)
    214 	movdqa %xmm0, 0x50(%rdi)
    215 	movdqa %xmm0, 0x60(%rdi)
    216 	movdqa %xmm0, 0x70(%rdi)
    217 	lea    128(%rdi), %rdi
    218 	cmp    $128, %rdx
    219 	jl     L(128bytesless_normal)
    220 
    221 	sub    $128, %rdx
    222 	movdqa %xmm0, (%rdi)
    223 	movdqa %xmm0, 0x10(%rdi)
    224 	movdqa %xmm0, 0x20(%rdi)
    225 	movdqa %xmm0, 0x30(%rdi)
    226 	movdqa %xmm0, 0x40(%rdi)
    227 	movdqa %xmm0, 0x50(%rdi)
    228 	movdqa %xmm0, 0x60(%rdi)
    229 	movdqa %xmm0, 0x70(%rdi)
    230 	lea    128(%rdi), %rdi
    231 	cmp    $128, %rdx
    232 	jge    L(128bytesormore_normal)
    233 
    234 L(128bytesless_normal):
    235 	add    %rdx, %rdi
    236 	shr    $2, %rdx
    237 	BRANCH_TO_JMPTBL_ENTRY (L(table_16_128bytes), %rdx, 4)
    238 
    239 	ALIGN (4)
    240 L(128bytesormore_nt):
    241 	sub    $128, %rdx
    242 	movntdq %xmm0, (%rdi)
    243 	movntdq %xmm0, 0x10(%rdi)
    244 	movntdq %xmm0, 0x20(%rdi)
    245 	movntdq %xmm0, 0x30(%rdi)
    246 	movntdq %xmm0, 0x40(%rdi)
    247 	movntdq %xmm0, 0x50(%rdi)
    248 	movntdq %xmm0, 0x60(%rdi)
    249 	movntdq %xmm0, 0x70(%rdi)
    250 	lea    128(%rdi), %rdi
    251 	cmp    $128, %rdx
    252 	jge    L(128bytesormore_nt)
    253 
    254 	sfence
    255 	add    %rdx, %rdi
    256 	shr    $2, %rdx
    257 	BRANCH_TO_JMPTBL_ENTRY (L(table_16_128bytes), %rdx, 4)
    258 
    259 	.pushsection .rodata.sse2,"a",@progbits
    260 	ALIGN (2)
    261 L(table_16_128bytes):
    262 	.int	JMPTBL (L(aligned_16_0bytes), L(table_16_128bytes))
    263 	.int	JMPTBL (L(aligned_16_4bytes), L(table_16_128bytes))
    264 	.int	JMPTBL (L(aligned_16_8bytes), L(table_16_128bytes))
    265 	.int	JMPTBL (L(aligned_16_12bytes), L(table_16_128bytes))
    266 	.int	JMPTBL (L(aligned_16_16bytes), L(table_16_128bytes))
    267 	.int	JMPTBL (L(aligned_16_20bytes), L(table_16_128bytes))
    268 	.int	JMPTBL (L(aligned_16_24bytes), L(table_16_128bytes))
    269 	.int	JMPTBL (L(aligned_16_28bytes), L(table_16_128bytes))
    270 	.int	JMPTBL (L(aligned_16_32bytes), L(table_16_128bytes))
    271 	.int	JMPTBL (L(aligned_16_36bytes), L(table_16_128bytes))
    272 	.int	JMPTBL (L(aligned_16_40bytes), L(table_16_128bytes))
    273 	.int	JMPTBL (L(aligned_16_44bytes), L(table_16_128bytes))
    274 	.int	JMPTBL (L(aligned_16_48bytes), L(table_16_128bytes))
    275 	.int	JMPTBL (L(aligned_16_52bytes), L(table_16_128bytes))
    276 	.int	JMPTBL (L(aligned_16_56bytes), L(table_16_128bytes))
    277 	.int	JMPTBL (L(aligned_16_60bytes), L(table_16_128bytes))
    278 	.int	JMPTBL (L(aligned_16_64bytes), L(table_16_128bytes))
    279 	.int	JMPTBL (L(aligned_16_68bytes), L(table_16_128bytes))
    280 	.int	JMPTBL (L(aligned_16_72bytes), L(table_16_128bytes))
    281 	.int	JMPTBL (L(aligned_16_76bytes), L(table_16_128bytes))
    282 	.int	JMPTBL (L(aligned_16_80bytes), L(table_16_128bytes))
    283 	.int	JMPTBL (L(aligned_16_84bytes), L(table_16_128bytes))
    284 	.int	JMPTBL (L(aligned_16_88bytes), L(table_16_128bytes))
    285 	.int	JMPTBL (L(aligned_16_92bytes), L(table_16_128bytes))
    286 	.int	JMPTBL (L(aligned_16_96bytes), L(table_16_128bytes))
    287 	.int	JMPTBL (L(aligned_16_100bytes), L(table_16_128bytes))
    288 	.int	JMPTBL (L(aligned_16_104bytes), L(table_16_128bytes))
    289 	.int	JMPTBL (L(aligned_16_108bytes), L(table_16_128bytes))
    290 	.int	JMPTBL (L(aligned_16_112bytes), L(table_16_128bytes))
    291 	.int	JMPTBL (L(aligned_16_116bytes), L(table_16_128bytes))
    292 	.int	JMPTBL (L(aligned_16_120bytes), L(table_16_128bytes))
    293 	.int	JMPTBL (L(aligned_16_124bytes), L(table_16_128bytes))
    294 	.popsection
    295 
    296 	ALIGN (4)
    297 L(aligned_16_112bytes):
    298 	movdqa	%xmm0, -112(%rdi)
    299 L(aligned_16_96bytes):
    300 	movdqa	%xmm0, -96(%rdi)
    301 L(aligned_16_80bytes):
    302 	movdqa	%xmm0, -80(%rdi)
    303 L(aligned_16_64bytes):
    304 	movdqa	%xmm0, -64(%rdi)
    305 L(aligned_16_48bytes):
    306 	movdqa	%xmm0, -48(%rdi)
    307 L(aligned_16_32bytes):
    308 	movdqa	%xmm0, -32(%rdi)
    309 L(aligned_16_16bytes):
    310 	movdqa	%xmm0, -16(%rdi)
    311 L(aligned_16_0bytes):
    312 	ret
    313 
    314 	ALIGN (4)
    315 L(aligned_16_116bytes):
    316 	movdqa	%xmm0, -116(%rdi)
    317 L(aligned_16_100bytes):
    318 	movdqa	%xmm0, -100(%rdi)
    319 L(aligned_16_84bytes):
    320 	movdqa	%xmm0, -84(%rdi)
    321 L(aligned_16_68bytes):
    322 	movdqa	%xmm0, -68(%rdi)
    323 L(aligned_16_52bytes):
    324 	movdqa	%xmm0, -52(%rdi)
    325 L(aligned_16_36bytes):
    326 	movdqa	%xmm0, -36(%rdi)
    327 L(aligned_16_20bytes):
    328 	movdqa	%xmm0, -20(%rdi)
    329 L(aligned_16_4bytes):
    330 	movl	%ecx, -4(%rdi)
    331 	ret
    332 
    333 	ALIGN (4)
    334 L(aligned_16_120bytes):
    335 	movdqa	%xmm0, -120(%rdi)
    336 L(aligned_16_104bytes):
    337 	movdqa	%xmm0, -104(%rdi)
    338 L(aligned_16_88bytes):
    339 	movdqa	%xmm0, -88(%rdi)
    340 L(aligned_16_72bytes):
    341 	movdqa	%xmm0, -72(%rdi)
    342 L(aligned_16_56bytes):
    343 	movdqa	%xmm0, -56(%rdi)
    344 L(aligned_16_40bytes):
    345 	movdqa	%xmm0, -40(%rdi)
    346 L(aligned_16_24bytes):
    347 	movdqa	%xmm0, -24(%rdi)
    348 L(aligned_16_8bytes):
    349 	movq	%xmm0, -8(%rdi)
    350 	ret
    351 
    352 	ALIGN (4)
    353 L(aligned_16_124bytes):
    354 	movdqa	%xmm0, -124(%rdi)
    355 L(aligned_16_108bytes):
    356 	movdqa	%xmm0, -108(%rdi)
    357 L(aligned_16_92bytes):
    358 	movdqa	%xmm0, -92(%rdi)
    359 L(aligned_16_76bytes):
    360 	movdqa	%xmm0, -76(%rdi)
    361 L(aligned_16_60bytes):
    362 	movdqa	%xmm0, -60(%rdi)
    363 L(aligned_16_44bytes):
    364 	movdqa	%xmm0, -44(%rdi)
    365 L(aligned_16_28bytes):
    366 	movdqa	%xmm0, -28(%rdi)
    367 L(aligned_16_12bytes):
    368 	movq	%xmm0, -12(%rdi)
    369 	movl	%ecx, -4(%rdi)
    370 	ret
    371 
    372 END (android_memset32)
    373