diff options
Diffstat (limited to 'arch/arm64/lib/crc32.S')
| -rw-r--r-- | arch/arm64/lib/crc32.S | 362 |
1 files changed, 0 insertions, 362 deletions
diff --git a/arch/arm64/lib/crc32.S b/arch/arm64/lib/crc32.S deleted file mode 100644 index 68825317460f..000000000000 --- a/arch/arm64/lib/crc32.S +++ /dev/null @@ -1,362 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Accelerated CRC32(C) using AArch64 CRC and PMULL instructions - * - * Copyright (C) 2016 - 2018 Linaro Ltd. - * Copyright (C) 2024 Google LLC - * - * Author: Ard Biesheuvel <ardb@kernel.org> - */ - -#include <linux/linkage.h> -#include <asm/assembler.h> - - .cpu generic+crc+crypto - - .macro bitle, reg - .endm - - .macro bitbe, reg - rbit \reg, \reg - .endm - - .macro bytele, reg - .endm - - .macro bytebe, reg - rbit \reg, \reg - lsr \reg, \reg, #24 - .endm - - .macro hwordle, reg -CPU_BE( rev16 \reg, \reg ) - .endm - - .macro hwordbe, reg -CPU_LE( rev \reg, \reg ) - rbit \reg, \reg -CPU_BE( lsr \reg, \reg, #16 ) - .endm - - .macro le, regs:vararg - .irp r, \regs -CPU_BE( rev \r, \r ) - .endr - .endm - - .macro be, regs:vararg - .irp r, \regs -CPU_LE( rev \r, \r ) - .endr - .irp r, \regs - rbit \r, \r - .endr - .endm - - .macro __crc32, c, order=le - bit\order w0 - cmp x2, #16 - b.lt 8f // less than 16 bytes - - and x7, x2, #0x1f - and x2, x2, #~0x1f - cbz x7, 32f // multiple of 32 bytes - - and x8, x7, #0xf - ldp x3, x4, [x1] - add x8, x8, x1 - add x1, x1, x7 - ldp x5, x6, [x8] - \order x3, x4, x5, x6 - - tst x7, #8 - crc32\c\()x w8, w0, x3 - csel x3, x3, x4, eq - csel w0, w0, w8, eq - tst x7, #4 - lsr x4, x3, #32 - crc32\c\()w w8, w0, w3 - csel x3, x3, x4, eq - csel w0, w0, w8, eq - tst x7, #2 - lsr w4, w3, #16 - crc32\c\()h w8, w0, w3 - csel w3, w3, w4, eq - csel w0, w0, w8, eq - tst x7, #1 - crc32\c\()b w8, w0, w3 - csel w0, w0, w8, eq - tst x7, #16 - crc32\c\()x w8, w0, x5 - crc32\c\()x w8, w8, x6 - csel w0, w0, w8, eq - cbz x2, 0f - -32: ldp x3, x4, [x1], #32 - sub x2, x2, #32 - ldp x5, x6, [x1, #-16] - \order x3, x4, x5, x6 - crc32\c\()x w0, w0, x3 - crc32\c\()x w0, w0, x4 - crc32\c\()x w0, w0, x5 - crc32\c\()x w0, w0, x6 - cbnz x2, 32b -0: bit\order w0 - ret - -8: tbz x2, #3, 4f - ldr x3, [x1], #8 - \order x3 - crc32\c\()x w0, w0, x3 -4: tbz x2, #2, 2f - ldr w3, [x1], #4 - \order w3 - crc32\c\()w w0, w0, w3 -2: tbz x2, #1, 1f - ldrh w3, [x1], #2 - hword\order w3 - crc32\c\()h w0, w0, w3 -1: tbz x2, #0, 0f - ldrb w3, [x1] - byte\order w3 - crc32\c\()b w0, w0, w3 -0: bit\order w0 - ret - .endm - - .align 5 -SYM_FUNC_START(crc32_le_arm64) - __crc32 -SYM_FUNC_END(crc32_le_arm64) - - .align 5 -SYM_FUNC_START(crc32c_le_arm64) - __crc32 c -SYM_FUNC_END(crc32c_le_arm64) - - .align 5 -SYM_FUNC_START(crc32_be_arm64) - __crc32 order=be -SYM_FUNC_END(crc32_be_arm64) - - in .req x1 - len .req x2 - - /* - * w0: input CRC at entry, output CRC at exit - * x1: pointer to input buffer - * x2: length of input in bytes - */ - .macro crc4way, insn, table, order=le - bit\order w0 - lsr len, len, #6 // len := # of 64-byte blocks - - /* Process up to 64 blocks of 64 bytes at a time */ -.La\@: mov x3, #64 - cmp len, #64 - csel x3, x3, len, hi // x3 := min(len, 64) - sub len, len, x3 - - /* Divide the input into 4 contiguous blocks */ - add x4, x3, x3, lsl #1 // x4 := 3 * x3 - add x7, in, x3, lsl #4 // x7 := in + 16 * x3 - add x8, in, x3, lsl #5 // x8 := in + 32 * x3 - add x9, in, x4, lsl #4 // x9 := in + 16 * x4 - - /* Load the folding coefficients from the lookup table */ - adr_l x5, \table - 12 // entry 0 omitted - add x5, x5, x4, lsl #2 // x5 += 12 * x3 - ldp s0, s1, [x5] - ldr s2, [x5, #8] - - /* Zero init partial CRCs for this iteration */ - mov w4, wzr - mov w5, wzr - mov w6, wzr - mov x17, xzr - -.Lb\@: sub x3, x3, #1 - \insn w6, w6, x17 - ldp x10, x11, [in], #16 - ldp x12, x13, [x7], #16 - ldp x14, x15, [x8], #16 - ldp x16, x17, [x9], #16 - - \order x10, x11, x12, x13, x14, x15, x16, x17 - - /* Apply the CRC transform to 4 16-byte blocks in parallel */ - \insn w0, w0, x10 - \insn w4, w4, x12 - \insn w5, w5, x14 - \insn w6, w6, x16 - \insn w0, w0, x11 - \insn w4, w4, x13 - \insn w5, w5, x15 - cbnz x3, .Lb\@ - - /* Combine the 4 partial results into w0 */ - mov v3.d[0], x0 - mov v4.d[0], x4 - mov v5.d[0], x5 - pmull v0.1q, v0.1d, v3.1d - pmull v1.1q, v1.1d, v4.1d - pmull v2.1q, v2.1d, v5.1d - eor v0.8b, v0.8b, v1.8b - eor v0.8b, v0.8b, v2.8b - mov x5, v0.d[0] - eor x5, x5, x17 - \insn w0, w6, x5 - - mov in, x9 - cbnz len, .La\@ - - bit\order w0 - ret - .endm - - .align 5 -SYM_FUNC_START(crc32c_le_arm64_4way) - crc4way crc32cx, .L0 -SYM_FUNC_END(crc32c_le_arm64_4way) - - .align 5 -SYM_FUNC_START(crc32_le_arm64_4way) - crc4way crc32x, .L1 -SYM_FUNC_END(crc32_le_arm64_4way) - - .align 5 -SYM_FUNC_START(crc32_be_arm64_4way) - crc4way crc32x, .L1, be -SYM_FUNC_END(crc32_be_arm64_4way) - - .section .rodata, "a", %progbits - .align 6 -.L0: .long 0xddc0152b, 0xba4fc28e, 0x493c7d27 - .long 0x0715ce53, 0x9e4addf8, 0xba4fc28e - .long 0xc96cfdc0, 0x0715ce53, 0xddc0152b - .long 0xab7aff2a, 0x0d3b6092, 0x9e4addf8 - .long 0x299847d5, 0x878a92a7, 0x39d3b296 - .long 0xb6dd949b, 0xab7aff2a, 0x0715ce53 - .long 0xa60ce07b, 0x83348832, 0x47db8317 - .long 0xd270f1a2, 0xb9e02b86, 0x0d3b6092 - .long 0x65863b64, 0xb6dd949b, 0xc96cfdc0 - .long 0xb3e32c28, 0xbac2fd7b, 0x878a92a7 - .long 0xf285651c, 0xce7f39f4, 0xdaece73e - .long 0x271d9844, 0xd270f1a2, 0xab7aff2a - .long 0x6cb08e5c, 0x2b3cac5d, 0x2162d385 - .long 0xcec3662e, 0x1b03397f, 0x83348832 - .long 0x8227bb8a, 0xb3e32c28, 0x299847d5 - .long 0xd7a4825c, 0xdd7e3b0c, 0xb9e02b86 - .long 0xf6076544, 0x10746f3c, 0x18b33a4e - .long 0x98d8d9cb, 0x271d9844, 0xb6dd949b - .long 0x57a3d037, 0x93a5f730, 0x78d9ccb7 - .long 0x3771e98f, 0x6b749fb2, 0xbac2fd7b - .long 0xe0ac139e, 0xcec3662e, 0xa60ce07b - .long 0x6f345e45, 0xe6fc4e6a, 0xce7f39f4 - .long 0xa2b73df1, 0xb0cd4768, 0x61d82e56 - .long 0x86d8e4d2, 0xd7a4825c, 0xd270f1a2 - .long 0xa90fd27a, 0x0167d312, 0xc619809d - .long 0xca6ef3ac, 0x26f6a60a, 0x2b3cac5d - .long 0x4597456a, 0x98d8d9cb, 0x65863b64 - .long 0xc9c8b782, 0x68bce87a, 0x1b03397f - .long 0x62ec6c6d, 0x6956fc3b, 0xebb883bd - .long 0x2342001e, 0x3771e98f, 0xb3e32c28 - .long 0xe8b6368b, 0x2178513a, 0x064f7f26 - .long 0x9ef68d35, 0x170076fa, 0xdd7e3b0c - .long 0x0b0bf8ca, 0x6f345e45, 0xf285651c - .long 0x02ee03b2, 0xff0dba97, 0x10746f3c - .long 0x135c83fd, 0xf872e54c, 0xc7a68855 - .long 0x00bcf5f6, 0x86d8e4d2, 0x271d9844 - .long 0x58ca5f00, 0x5bb8f1bc, 0x8e766a0c - .long 0xded288f8, 0xb3af077a, 0x93a5f730 - .long 0x37170390, 0xca6ef3ac, 0x6cb08e5c - .long 0xf48642e9, 0xdd66cbbb, 0x6b749fb2 - .long 0xb25b29f2, 0xe9e28eb4, 0x1393e203 - .long 0x45cddf4e, 0xc9c8b782, 0xcec3662e - .long 0xdfd94fb2, 0x93e106a4, 0x96c515bb - .long 0x021ac5ef, 0xd813b325, 0xe6fc4e6a - .long 0x8e1450f7, 0x2342001e, 0x8227bb8a - .long 0xe0cdcf86, 0x6d9a4957, 0xb0cd4768 - .long 0x613eee91, 0xd2c3ed1a, 0x39c7ff35 - .long 0xbedc6ba1, 0x9ef68d35, 0xd7a4825c - .long 0x0cd1526a, 0xf2271e60, 0x0ab3844b - .long 0xd6c3a807, 0x2664fd8b, 0x0167d312 - .long 0x1d31175f, 0x02ee03b2, 0xf6076544 - .long 0x4be7fd90, 0x363bd6b3, 0x26f6a60a - .long 0x6eeed1c9, 0x5fabe670, 0xa741c1bf - .long 0xb3a6da94, 0x00bcf5f6, 0x98d8d9cb - .long 0x2e7d11a7, 0x17f27698, 0x49c3cc9c - .long 0x889774e1, 0xaa7c7ad5, 0x68bce87a - .long 0x8a074012, 0xded288f8, 0x57a3d037 - .long 0xbd0bb25f, 0x6d390dec, 0x6956fc3b - .long 0x3be3c09b, 0x6353c1cc, 0x42d98888 - .long 0x465a4eee, 0xf48642e9, 0x3771e98f - .long 0x2e5f3c8c, 0xdd35bc8d, 0xb42ae3d9 - .long 0xa52f58ec, 0x9a5ede41, 0x2178513a - .long 0x47972100, 0x45cddf4e, 0xe0ac139e - .long 0x359674f7, 0xa51b6135, 0x170076fa - -.L1: .long 0xaf449247, 0x81256527, 0xccaa009e - .long 0x57c54819, 0x1d9513d7, 0x81256527 - .long 0x3f41287a, 0x57c54819, 0xaf449247 - .long 0xf5e48c85, 0x910eeec1, 0x1d9513d7 - .long 0x1f0c2cdd, 0x9026d5b1, 0xae0b5394 - .long 0x71d54a59, 0xf5e48c85, 0x57c54819 - .long 0x1c63267b, 0xfe807bbd, 0x0cbec0ed - .long 0xd31343ea, 0xe95c1271, 0x910eeec1 - .long 0xf9d9c7ee, 0x71d54a59, 0x3f41287a - .long 0x9ee62949, 0xcec97417, 0x9026d5b1 - .long 0xa55d1514, 0xf183c71b, 0xd1df2327 - .long 0x21aa2b26, 0xd31343ea, 0xf5e48c85 - .long 0x9d842b80, 0xeea395c4, 0x3c656ced - .long 0xd8110ff1, 0xcd669a40, 0xfe807bbd - .long 0x3f9e9356, 0x9ee62949, 0x1f0c2cdd - .long 0x1d6708a0, 0x0c30f51d, 0xe95c1271 - .long 0xef82aa68, 0xdb3935ea, 0xb918a347 - .long 0xd14bcc9b, 0x21aa2b26, 0x71d54a59 - .long 0x99cce860, 0x356d209f, 0xff6f2fc2 - .long 0xd8af8e46, 0xc352f6de, 0xcec97417 - .long 0xf1996890, 0xd8110ff1, 0x1c63267b - .long 0x631bc508, 0xe95c7216, 0xf183c71b - .long 0x8511c306, 0x8e031a19, 0x9b9bdbd0 - .long 0xdb3839f3, 0x1d6708a0, 0xd31343ea - .long 0x7a92fffb, 0xf7003835, 0x4470ac44 - .long 0x6ce68f2a, 0x00eba0c8, 0xeea395c4 - .long 0x4caaa263, 0xd14bcc9b, 0xf9d9c7ee - .long 0xb46f7cff, 0x9a1b53c8, 0xcd669a40 - .long 0x60290934, 0x81b6f443, 0x6d40f445 - .long 0x8e976a7d, 0xd8af8e46, 0x9ee62949 - .long 0xdcf5088a, 0x9dbdc100, 0x145575d5 - .long 0x1753ab84, 0xbbf2f6d6, 0x0c30f51d - .long 0x255b139e, 0x631bc508, 0xa55d1514 - .long 0xd784eaa8, 0xce26786c, 0xdb3935ea - .long 0x6d2c864a, 0x8068c345, 0x2586d334 - .long 0x02072e24, 0xdb3839f3, 0x21aa2b26 - .long 0x06689b0a, 0x5efd72f5, 0xe0575528 - .long 0x1e52f5ea, 0x4117915b, 0x356d209f - .long 0x1d3d1db6, 0x6ce68f2a, 0x9d842b80 - .long 0x3796455c, 0xb8e0e4a8, 0xc352f6de - .long 0xdf3a4eb3, 0xc55a2330, 0xb84ffa9c - .long 0x28ae0976, 0xb46f7cff, 0xd8110ff1 - .long 0x9764bc8d, 0xd7e7a22c, 0x712510f0 - .long 0x13a13e18, 0x3e9a43cd, 0xe95c7216 - .long 0xb8ee242e, 0x8e976a7d, 0x3f9e9356 - .long 0x0c540e7b, 0x753c81ff, 0x8e031a19 - .long 0x9924c781, 0xb9220208, 0x3edcde65 - .long 0x3954de39, 0x1753ab84, 0x1d6708a0 - .long 0xf32238b5, 0xbec81497, 0x9e70b943 - .long 0xbbd2cd2c, 0x0925d861, 0xf7003835 - .long 0xcc401304, 0xd784eaa8, 0xef82aa68 - .long 0x4987e684, 0x6044fbb0, 0x00eba0c8 - .long 0x3aa11427, 0x18fe3b4a, 0x87441142 - .long 0x297aad60, 0x02072e24, 0xd14bcc9b - .long 0xf60c5e51, 0x6ef6f487, 0x5b7fdd0a - .long 0x632d78c5, 0x3fc33de4, 0x9a1b53c8 - .long 0x25b8822a, 0x1e52f5ea, 0x99cce860 - .long 0xd4fc84bc, 0x1af62fb8, 0x81b6f443 - .long 0x5690aa32, 0xa91fdefb, 0x688a110e - .long 0x1357a093, 0x3796455c, 0xd8af8e46 - .long 0x798fdd33, 0xaaa18a37, 0x357b9517 - .long 0xc2815395, 0x54d42691, 0x9dbdc100 - .long 0x21cfc0f7, 0x28ae0976, 0xf1996890 - .long 0xa0decef3, 0x7b4aa8b7, 0xbbf2f6d6 |