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    Subject[RESEND PATCH v4 2/6] An accelerated AES/GCM stitched implementation.
    Date
    Improve overall performance of AES/GCM encrypt and decrypt operations
    for Power10 or later CPU.

    Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
    ---
    arch/powerpc/crypto/aes-gcm-p10.S | 1521 +++++++++++++++++++++++++++++
    1 file changed, 1521 insertions(+)
    create mode 100644 arch/powerpc/crypto/aes-gcm-p10.S

    diff --git a/arch/powerpc/crypto/aes-gcm-p10.S b/arch/powerpc/crypto/aes-gcm-p10.S
    new file mode 100644
    index 000000000000..a51f4b265308
    --- /dev/null
    +++ b/arch/powerpc/crypto/aes-gcm-p10.S
    @@ -0,0 +1,1521 @@
    +/* SPDX-License-Identifier: GPL-2.0-or-later */
    + #
    + # Accelerated AES-GCM stitched implementation for ppc64le.
    + #
    + # Copyright 2022- IBM Inc. All rights reserved
    + #
    + #===================================================================================
    + # Written by Danny Tsen <dtsen@linux.ibm.com>
    + #
    + # GHASH is based on the Karatsuba multiplication method.
    + #
    + # Xi xor X1
    + #
    + # X1 * H^4 + X2 * H^3 + x3 * H^2 + X4 * H =
    + # (X1.h * H4.h + xX.l * H4.l + X1 * H4) +
    + # (X2.h * H3.h + X2.l * H3.l + X2 * H3) +
    + # (X3.h * H2.h + X3.l * H2.l + X3 * H2) +
    + # (X4.h * H.h + X4.l * H.l + X4 * H)
    + #
    + # Xi = v0
    + # H Poly = v2
    + # Hash keys = v3 - v14
    + # ( H.l, H, H.h)
    + # ( H^2.l, H^2, H^2.h)
    + # ( H^3.l, H^3, H^3.h)
    + # ( H^4.l, H^4, H^4.h)
    + #
    + # v30 is IV
    + # v31 - counter 1
    + #
    + # AES used,
    + # vs0 - vs14 for round keys
    + # v15, v16, v17, v18, v19, v20, v21, v22 for 8 blocks (encrypted)
    + #
    + # This implementation uses stitched AES-GCM approach to improve overall performance.
    + # AES is implemented with 8x blocks and GHASH is using 2 4x blocks.
    + #
    + # ===================================================================================
    + #
    +
    +#include <asm/ppc_asm.h>
    +#include <linux/linkage.h>
    +
    +.machine "any"
    +.text
    +
    + # 4x loops
    + # v15 - v18 - input states
    + # vs1 - vs9 - round keys
    + #
    +.macro Loop_aes_middle4x
    + xxlor 19+32, 1, 1
    + xxlor 20+32, 2, 2
    + xxlor 21+32, 3, 3
    + xxlor 22+32, 4, 4
    +
    + vcipher 15, 15, 19
    + vcipher 16, 16, 19
    + vcipher 17, 17, 19
    + vcipher 18, 18, 19
    +
    + vcipher 15, 15, 20
    + vcipher 16, 16, 20
    + vcipher 17, 17, 20
    + vcipher 18, 18, 20
    +
    + vcipher 15, 15, 21
    + vcipher 16, 16, 21
    + vcipher 17, 17, 21
    + vcipher 18, 18, 21
    +
    + vcipher 15, 15, 22
    + vcipher 16, 16, 22
    + vcipher 17, 17, 22
    + vcipher 18, 18, 22
    +
    + xxlor 19+32, 5, 5
    + xxlor 20+32, 6, 6
    + xxlor 21+32, 7, 7
    + xxlor 22+32, 8, 8
    +
    + vcipher 15, 15, 19
    + vcipher 16, 16, 19
    + vcipher 17, 17, 19
    + vcipher 18, 18, 19
    +
    + vcipher 15, 15, 20
    + vcipher 16, 16, 20
    + vcipher 17, 17, 20
    + vcipher 18, 18, 20
    +
    + vcipher 15, 15, 21
    + vcipher 16, 16, 21
    + vcipher 17, 17, 21
    + vcipher 18, 18, 21
    +
    + vcipher 15, 15, 22
    + vcipher 16, 16, 22
    + vcipher 17, 17, 22
    + vcipher 18, 18, 22
    +
    + xxlor 23+32, 9, 9
    + vcipher 15, 15, 23
    + vcipher 16, 16, 23
    + vcipher 17, 17, 23
    + vcipher 18, 18, 23
    +.endm
    +
    + # 8x loops
    + # v15 - v22 - input states
    + # vs1 - vs9 - round keys
    + #
    +.macro Loop_aes_middle8x
    + xxlor 23+32, 1, 1
    + xxlor 24+32, 2, 2
    + xxlor 25+32, 3, 3
    + xxlor 26+32, 4, 4
    +
    + vcipher 15, 15, 23
    + vcipher 16, 16, 23
    + vcipher 17, 17, 23
    + vcipher 18, 18, 23
    + vcipher 19, 19, 23
    + vcipher 20, 20, 23
    + vcipher 21, 21, 23
    + vcipher 22, 22, 23
    +
    + vcipher 15, 15, 24
    + vcipher 16, 16, 24
    + vcipher 17, 17, 24
    + vcipher 18, 18, 24
    + vcipher 19, 19, 24
    + vcipher 20, 20, 24
    + vcipher 21, 21, 24
    + vcipher 22, 22, 24
    +
    + vcipher 15, 15, 25
    + vcipher 16, 16, 25
    + vcipher 17, 17, 25
    + vcipher 18, 18, 25
    + vcipher 19, 19, 25
    + vcipher 20, 20, 25
    + vcipher 21, 21, 25
    + vcipher 22, 22, 25
    +
    + vcipher 15, 15, 26
    + vcipher 16, 16, 26
    + vcipher 17, 17, 26
    + vcipher 18, 18, 26
    + vcipher 19, 19, 26
    + vcipher 20, 20, 26
    + vcipher 21, 21, 26
    + vcipher 22, 22, 26
    +
    + xxlor 23+32, 5, 5
    + xxlor 24+32, 6, 6
    + xxlor 25+32, 7, 7
    + xxlor 26+32, 8, 8
    +
    + vcipher 15, 15, 23
    + vcipher 16, 16, 23
    + vcipher 17, 17, 23
    + vcipher 18, 18, 23
    + vcipher 19, 19, 23
    + vcipher 20, 20, 23
    + vcipher 21, 21, 23
    + vcipher 22, 22, 23
    +
    + vcipher 15, 15, 24
    + vcipher 16, 16, 24
    + vcipher 17, 17, 24
    + vcipher 18, 18, 24
    + vcipher 19, 19, 24
    + vcipher 20, 20, 24
    + vcipher 21, 21, 24
    + vcipher 22, 22, 24
    +
    + vcipher 15, 15, 25
    + vcipher 16, 16, 25
    + vcipher 17, 17, 25
    + vcipher 18, 18, 25
    + vcipher 19, 19, 25
    + vcipher 20, 20, 25
    + vcipher 21, 21, 25
    + vcipher 22, 22, 25
    +
    + vcipher 15, 15, 26
    + vcipher 16, 16, 26
    + vcipher 17, 17, 26
    + vcipher 18, 18, 26
    + vcipher 19, 19, 26
    + vcipher 20, 20, 26
    + vcipher 21, 21, 26
    + vcipher 22, 22, 26
    +
    + xxlor 23+32, 9, 9
    + vcipher 15, 15, 23
    + vcipher 16, 16, 23
    + vcipher 17, 17, 23
    + vcipher 18, 18, 23
    + vcipher 19, 19, 23
    + vcipher 20, 20, 23
    + vcipher 21, 21, 23
    + vcipher 22, 22, 23
    +.endm
    +
    +.macro Loop_aes_middle_1x
    + xxlor 19+32, 1, 1
    + xxlor 20+32, 2, 2
    + xxlor 21+32, 3, 3
    + xxlor 22+32, 4, 4
    +
    + vcipher 15, 15, 19
    + vcipher 15, 15, 20
    + vcipher 15, 15, 21
    + vcipher 15, 15, 22
    +
    + xxlor 19+32, 5, 5
    + xxlor 20+32, 6, 6
    + xxlor 21+32, 7, 7
    + xxlor 22+32, 8, 8
    +
    + vcipher 15, 15, 19
    + vcipher 15, 15, 20
    + vcipher 15, 15, 21
    + vcipher 15, 15, 22
    +
    + xxlor 19+32, 9, 9
    + vcipher 15, 15, 19
    +.endm
    +
    + #
    + # Compute 4x hash values based on Karatsuba method.
    + #
    +.macro ppc_aes_gcm_ghash
    + vxor 15, 15, 0
    +
    + vpmsumd 23, 12, 15 # H4.L * X.L
    + vpmsumd 24, 9, 16
    + vpmsumd 25, 6, 17
    + vpmsumd 26, 3, 18
    +
    + vxor 23, 23, 24
    + vxor 23, 23, 25
    + vxor 23, 23, 26 # L
    +
    + vpmsumd 24, 13, 15 # H4.L * X.H + H4.H * X.L
    + vpmsumd 25, 10, 16 # H3.L * X1.H + H3.H * X1.L
    + vpmsumd 26, 7, 17
    + vpmsumd 27, 4, 18
    +
    + vxor 24, 24, 25
    + vxor 24, 24, 26
    + vxor 24, 24, 27 # M
    +
    + # sum hash and reduction with H Poly
    + vpmsumd 28, 23, 2 # reduction
    +
    + vxor 29, 29, 29
    + vsldoi 26, 24, 29, 8 # mL
    + vsldoi 29, 29, 24, 8 # mH
    + vxor 23, 23, 26 # mL + L
    +
    + vsldoi 23, 23, 23, 8 # swap
    + vxor 23, 23, 28
    +
    + vpmsumd 24, 14, 15 # H4.H * X.H
    + vpmsumd 25, 11, 16
    + vpmsumd 26, 8, 17
    + vpmsumd 27, 5, 18
    +
    + vxor 24, 24, 25
    + vxor 24, 24, 26
    + vxor 24, 24, 27
    +
    + vxor 24, 24, 29
    +
    + # sum hash and reduction with H Poly
    + vsldoi 27, 23, 23, 8 # swap
    + vpmsumd 23, 23, 2
    + vxor 27, 27, 24
    + vxor 23, 23, 27
    +
    + xxlor 32, 23+32, 23+32 # update hash
    +
    +.endm
    +
    + #
    + # Combine two 4x ghash
    + # v15 - v22 - input blocks
    + #
    +.macro ppc_aes_gcm_ghash2_4x
    + # first 4x hash
    + vxor 15, 15, 0 # Xi + X
    +
    + vpmsumd 23, 12, 15 # H4.L * X.L
    + vpmsumd 24, 9, 16
    + vpmsumd 25, 6, 17
    + vpmsumd 26, 3, 18
    +
    + vxor 23, 23, 24
    + vxor 23, 23, 25
    + vxor 23, 23, 26 # L
    +
    + vpmsumd 24, 13, 15 # H4.L * X.H + H4.H * X.L
    + vpmsumd 25, 10, 16 # H3.L * X1.H + H3.H * X1.L
    + vpmsumd 26, 7, 17
    + vpmsumd 27, 4, 18
    +
    + vxor 24, 24, 25
    + vxor 24, 24, 26
    +
    + # sum hash and reduction with H Poly
    + vpmsumd 28, 23, 2 # reduction
    +
    + vxor 29, 29, 29
    +
    + vxor 24, 24, 27 # M
    + vsldoi 26, 24, 29, 8 # mL
    + vsldoi 29, 29, 24, 8 # mH
    + vxor 23, 23, 26 # mL + L
    +
    + vsldoi 23, 23, 23, 8 # swap
    + vxor 23, 23, 28
    +
    + vpmsumd 24, 14, 15 # H4.H * X.H
    + vpmsumd 25, 11, 16
    + vpmsumd 26, 8, 17
    + vpmsumd 27, 5, 18
    +
    + vxor 24, 24, 25
    + vxor 24, 24, 26
    + vxor 24, 24, 27 # H
    +
    + vxor 24, 24, 29 # H + mH
    +
    + # sum hash and reduction with H Poly
    + vsldoi 27, 23, 23, 8 # swap
    + vpmsumd 23, 23, 2
    + vxor 27, 27, 24
    + vxor 27, 23, 27 # 1st Xi
    +
    + # 2nd 4x hash
    + vpmsumd 24, 9, 20
    + vpmsumd 25, 6, 21
    + vpmsumd 26, 3, 22
    + vxor 19, 19, 27 # Xi + X
    + vpmsumd 23, 12, 19 # H4.L * X.L
    +
    + vxor 23, 23, 24
    + vxor 23, 23, 25
    + vxor 23, 23, 26 # L
    +
    + vpmsumd 24, 13, 19 # H4.L * X.H + H4.H * X.L
    + vpmsumd 25, 10, 20 # H3.L * X1.H + H3.H * X1.L
    + vpmsumd 26, 7, 21
    + vpmsumd 27, 4, 22
    +
    + vxor 24, 24, 25
    + vxor 24, 24, 26
    +
    + # sum hash and reduction with H Poly
    + vpmsumd 28, 23, 2 # reduction
    +
    + vxor 29, 29, 29
    +
    + vxor 24, 24, 27 # M
    + vsldoi 26, 24, 29, 8 # mL
    + vsldoi 29, 29, 24, 8 # mH
    + vxor 23, 23, 26 # mL + L
    +
    + vsldoi 23, 23, 23, 8 # swap
    + vxor 23, 23, 28
    +
    + vpmsumd 24, 14, 19 # H4.H * X.H
    + vpmsumd 25, 11, 20
    + vpmsumd 26, 8, 21
    + vpmsumd 27, 5, 22
    +
    + vxor 24, 24, 25
    + vxor 24, 24, 26
    + vxor 24, 24, 27 # H
    +
    + vxor 24, 24, 29 # H + mH
    +
    + # sum hash and reduction with H Poly
    + vsldoi 27, 23, 23, 8 # swap
    + vpmsumd 23, 23, 2
    + vxor 27, 27, 24
    + vxor 23, 23, 27
    +
    + xxlor 32, 23+32, 23+32 # update hash
    +
    +.endm
    +
    + #
    + # Compute update single hash
    + #
    +.macro ppc_update_hash_1x
    + vxor 28, 28, 0
    +
    + vxor 19, 19, 19
    +
    + vpmsumd 22, 3, 28 # L
    + vpmsumd 23, 4, 28 # M
    + vpmsumd 24, 5, 28 # H
    +
    + vpmsumd 27, 22, 2 # reduction
    +
    + vsldoi 25, 23, 19, 8 # mL
    + vsldoi 26, 19, 23, 8 # mH
    + vxor 22, 22, 25 # LL + LL
    + vxor 24, 24, 26 # HH + HH
    +
    + vsldoi 22, 22, 22, 8 # swap
    + vxor 22, 22, 27
    +
    + vsldoi 20, 22, 22, 8 # swap
    + vpmsumd 22, 22, 2 # reduction
    + vxor 20, 20, 24
    + vxor 22, 22, 20
    +
    + vmr 0, 22 # update hash
    +
    +.endm
    +
    +.macro SAVE_REGS
    + stdu 1,-640(1)
    + mflr 0
    +
    + std 14,112(1)
    + std 15,120(1)
    + std 16,128(1)
    + std 17,136(1)
    + std 18,144(1)
    + std 19,152(1)
    + std 20,160(1)
    + std 21,168(1)
    + li 9, 256
    + stvx 20, 9, 1
    + addi 9, 9, 16
    + stvx 21, 9, 1
    + addi 9, 9, 16
    + stvx 22, 9, 1
    + addi 9, 9, 16
    + stvx 23, 9, 1
    + addi 9, 9, 16
    + stvx 24, 9, 1
    + addi 9, 9, 16
    + stvx 25, 9, 1
    + addi 9, 9, 16
    + stvx 26, 9, 1
    + addi 9, 9, 16
    + stvx 27, 9, 1
    + addi 9, 9, 16
    + stvx 28, 9, 1
    + addi 9, 9, 16
    + stvx 29, 9, 1
    + addi 9, 9, 16
    + stvx 30, 9, 1
    + addi 9, 9, 16
    + stvx 31, 9, 1
    + stxv 14, 464(1)
    + stxv 15, 480(1)
    + stxv 16, 496(1)
    + stxv 17, 512(1)
    + stxv 18, 528(1)
    + stxv 19, 544(1)
    + stxv 20, 560(1)
    + stxv 21, 576(1)
    + stxv 22, 592(1)
    + std 0, 656(1)
    +.endm
    +
    +.macro RESTORE_REGS
    + lxv 14, 464(1)
    + lxv 15, 480(1)
    + lxv 16, 496(1)
    + lxv 17, 512(1)
    + lxv 18, 528(1)
    + lxv 19, 544(1)
    + lxv 20, 560(1)
    + lxv 21, 576(1)
    + lxv 22, 592(1)
    + li 9, 256
    + lvx 20, 9, 1
    + addi 9, 9, 16
    + lvx 21, 9, 1
    + addi 9, 9, 16
    + lvx 22, 9, 1
    + addi 9, 9, 16
    + lvx 23, 9, 1
    + addi 9, 9, 16
    + lvx 24, 9, 1
    + addi 9, 9, 16
    + lvx 25, 9, 1
    + addi 9, 9, 16
    + lvx 26, 9, 1
    + addi 9, 9, 16
    + lvx 27, 9, 1
    + addi 9, 9, 16
    + lvx 28, 9, 1
    + addi 9, 9, 16
    + lvx 29, 9, 1
    + addi 9, 9, 16
    + lvx 30, 9, 1
    + addi 9, 9, 16
    + lvx 31, 9, 1
    +
    + ld 0, 656(1)
    + ld 14,112(1)
    + ld 15,120(1)
    + ld 16,128(1)
    + ld 17,136(1)
    + ld 18,144(1)
    + ld 19,152(1)
    + ld 20,160(1)
    + ld 21,168(1)
    +
    + mtlr 0
    + addi 1, 1, 640
    +.endm
    +
    +.macro LOAD_HASH_TABLE
    + # Load Xi
    + lxvb16x 32, 0, 8 # load Xi
    +
    + # load Hash - h^4, h^3, h^2, h
    + li 10, 32
    + lxvd2x 2+32, 10, 8 # H Poli
    + li 10, 48
    + lxvd2x 3+32, 10, 8 # Hl
    + li 10, 64
    + lxvd2x 4+32, 10, 8 # H
    + li 10, 80
    + lxvd2x 5+32, 10, 8 # Hh
    +
    + li 10, 96
    + lxvd2x 6+32, 10, 8 # H^2l
    + li 10, 112
    + lxvd2x 7+32, 10, 8 # H^2
    + li 10, 128
    + lxvd2x 8+32, 10, 8 # H^2h
    +
    + li 10, 144
    + lxvd2x 9+32, 10, 8 # H^3l
    + li 10, 160
    + lxvd2x 10+32, 10, 8 # H^3
    + li 10, 176
    + lxvd2x 11+32, 10, 8 # H^3h
    +
    + li 10, 192
    + lxvd2x 12+32, 10, 8 # H^4l
    + li 10, 208
    + lxvd2x 13+32, 10, 8 # H^4
    + li 10, 224
    + lxvd2x 14+32, 10, 8 # H^4h
    +.endm
    +
    + #
    + # aes_p10_gcm_encrypt (const void *inp, void *out, size_t len,
    + # const char *rk, unsigned char iv[16], void *Xip);
    + #
    + # r3 - inp
    + # r4 - out
    + # r5 - len
    + # r6 - AES round keys
    + # r7 - iv and other data
    + # r8 - Xi, HPoli, hash keys
    + #
    + # rounds is at offset 240 in rk
    + # Xi is at 0 in gcm_table (Xip).
    + #
    +_GLOBAL(aes_p10_gcm_encrypt)
    +.align 5
    +
    + SAVE_REGS
    +
    + LOAD_HASH_TABLE
    +
    + # initialize ICB: GHASH( IV ), IV - r7
    + lxvb16x 30+32, 0, 7 # load IV - v30
    +
    + mr 12, 5 # length
    + li 11, 0 # block index
    +
    + # counter 1
    + vxor 31, 31, 31
    + vspltisb 22, 1
    + vsldoi 31, 31, 22,1 # counter 1
    +
    + # load round key to VSR
    + lxv 0, 0(6)
    + lxv 1, 0x10(6)
    + lxv 2, 0x20(6)
    + lxv 3, 0x30(6)
    + lxv 4, 0x40(6)
    + lxv 5, 0x50(6)
    + lxv 6, 0x60(6)
    + lxv 7, 0x70(6)
    + lxv 8, 0x80(6)
    + lxv 9, 0x90(6)
    + lxv 10, 0xa0(6)
    +
    + # load rounds - 10 (128), 12 (192), 14 (256)
    + lwz 9,240(6)
    +
    + #
    + # vxor state, state, w # addroundkey
    + xxlor 32+29, 0, 0
    + vxor 15, 30, 29 # IV + round key - add round key 0
    +
    + cmpdi 9, 10
    + beq Loop_aes_gcm_8x
    +
    + # load 2 more round keys (v11, v12)
    + lxv 11, 0xb0(6)
    + lxv 12, 0xc0(6)
    +
    + cmpdi 9, 12
    + beq Loop_aes_gcm_8x
    +
    + # load 2 more round keys (v11, v12, v13, v14)
    + lxv 13, 0xd0(6)
    + lxv 14, 0xe0(6)
    + cmpdi 9, 14
    + beq Loop_aes_gcm_8x
    +
    + b aes_gcm_out
    +
    +.align 5
    +Loop_aes_gcm_8x:
    + mr 14, 3
    + mr 9, 4
    +
    + #
    + # check partial block
    + #
    +Continue_partial_check:
    + ld 15, 56(7)
    + cmpdi 15, 0
    + beq Continue
    + bgt Final_block
    + cmpdi 15, 16
    + blt Final_block
    +
    +Continue:
    + # n blcoks
    + li 10, 128
    + divdu 10, 12, 10 # n 128 bytes-blocks
    + cmpdi 10, 0
    + beq Loop_last_block
    +
    + vaddudm 30, 30, 31 # IV + counter
    + vxor 16, 30, 29
    + vaddudm 30, 30, 31
    + vxor 17, 30, 29
    + vaddudm 30, 30, 31
    + vxor 18, 30, 29
    + vaddudm 30, 30, 31
    + vxor 19, 30, 29
    + vaddudm 30, 30, 31
    + vxor 20, 30, 29
    + vaddudm 30, 30, 31
    + vxor 21, 30, 29
    + vaddudm 30, 30, 31
    + vxor 22, 30, 29
    +
    + mtctr 10
    +
    + li 15, 16
    + li 16, 32
    + li 17, 48
    + li 18, 64
    + li 19, 80
    + li 20, 96
    + li 21, 112
    +
    + lwz 10, 240(6)
    +
    +Loop_8x_block:
    +
    + lxvb16x 15, 0, 14 # load block
    + lxvb16x 16, 15, 14 # load block
    + lxvb16x 17, 16, 14 # load block
    + lxvb16x 18, 17, 14 # load block
    + lxvb16x 19, 18, 14 # load block
    + lxvb16x 20, 19, 14 # load block
    + lxvb16x 21, 20, 14 # load block
    + lxvb16x 22, 21, 14 # load block
    + addi 14, 14, 128
    +
    + Loop_aes_middle8x
    +
    + xxlor 23+32, 10, 10
    +
    + cmpdi 10, 10
    + beq Do_next_ghash
    +
    + # 192 bits
    + xxlor 24+32, 11, 11
    +
    + vcipher 15, 15, 23
    + vcipher 16, 16, 23
    + vcipher 17, 17, 23
    + vcipher 18, 18, 23
    + vcipher 19, 19, 23
    + vcipher 20, 20, 23
    + vcipher 21, 21, 23
    + vcipher 22, 22, 23
    +
    + vcipher 15, 15, 24
    + vcipher 16, 16, 24
    + vcipher 17, 17, 24
    + vcipher 18, 18, 24
    + vcipher 19, 19, 24
    + vcipher 20, 20, 24
    + vcipher 21, 21, 24
    + vcipher 22, 22, 24
    +
    + xxlor 23+32, 12, 12
    +
    + cmpdi 10, 12
    + beq Do_next_ghash
    +
    + # 256 bits
    + xxlor 24+32, 13, 13
    +
    + vcipher 15, 15, 23
    + vcipher 16, 16, 23
    + vcipher 17, 17, 23
    + vcipher 18, 18, 23
    + vcipher 19, 19, 23
    + vcipher 20, 20, 23
    + vcipher 21, 21, 23
    + vcipher 22, 22, 23
    +
    + vcipher 15, 15, 24
    + vcipher 16, 16, 24
    + vcipher 17, 17, 24
    + vcipher 18, 18, 24
    + vcipher 19, 19, 24
    + vcipher 20, 20, 24
    + vcipher 21, 21, 24
    + vcipher 22, 22, 24
    +
    + xxlor 23+32, 14, 14
    +
    + cmpdi 10, 14
    + beq Do_next_ghash
    + b aes_gcm_out
    +
    +Do_next_ghash:
    +
    + #
    + # last round
    + vcipherlast 15, 15, 23
    + vcipherlast 16, 16, 23
    +
    + xxlxor 47, 47, 15
    + stxvb16x 47, 0, 9 # store output
    + xxlxor 48, 48, 16
    + stxvb16x 48, 15, 9 # store output
    +
    + vcipherlast 17, 17, 23
    + vcipherlast 18, 18, 23
    +
    + xxlxor 49, 49, 17
    + stxvb16x 49, 16, 9 # store output
    + xxlxor 50, 50, 18
    + stxvb16x 50, 17, 9 # store output
    +
    + vcipherlast 19, 19, 23
    + vcipherlast 20, 20, 23
    +
    + xxlxor 51, 51, 19
    + stxvb16x 51, 18, 9 # store output
    + xxlxor 52, 52, 20
    + stxvb16x 52, 19, 9 # store output
    +
    + vcipherlast 21, 21, 23
    + vcipherlast 22, 22, 23
    +
    + xxlxor 53, 53, 21
    + stxvb16x 53, 20, 9 # store output
    + xxlxor 54, 54, 22
    + stxvb16x 54, 21, 9 # store output
    +
    + addi 9, 9, 128
    +
    + # ghash here
    + ppc_aes_gcm_ghash2_4x
    +
    + xxlor 27+32, 0, 0
    + vaddudm 30, 30, 31 # IV + counter
    + vmr 29, 30
    + vxor 15, 30, 27 # add round key
    + vaddudm 30, 30, 31
    + vxor 16, 30, 27
    + vaddudm 30, 30, 31
    + vxor 17, 30, 27
    + vaddudm 30, 30, 31
    + vxor 18, 30, 27
    + vaddudm 30, 30, 31
    + vxor 19, 30, 27
    + vaddudm 30, 30, 31
    + vxor 20, 30, 27
    + vaddudm 30, 30, 31
    + vxor 21, 30, 27
    + vaddudm 30, 30, 31
    + vxor 22, 30, 27
    +
    + addi 12, 12, -128
    + addi 11, 11, 128
    +
    + bdnz Loop_8x_block
    +
    + vmr 30, 29
    + stxvb16x 30+32, 0, 7 # update IV
    +
    +Loop_last_block:
    + cmpdi 12, 0
    + beq aes_gcm_out
    +
    + # loop last few blocks
    + li 10, 16
    + divdu 10, 12, 10
    +
    + mtctr 10
    +
    + lwz 10, 240(6)
    +
    + cmpdi 12, 16
    + blt Final_block
    +
    +Next_rem_block:
    + lxvb16x 15, 0, 14 # load block
    +
    + Loop_aes_middle_1x
    +
    + xxlor 23+32, 10, 10
    +
    + cmpdi 10, 10
    + beq Do_next_1x
    +
    + # 192 bits
    + xxlor 24+32, 11, 11
    +
    + vcipher 15, 15, 23
    + vcipher 15, 15, 24
    +
    + xxlor 23+32, 12, 12
    +
    + cmpdi 10, 12
    + beq Do_next_1x
    +
    + # 256 bits
    + xxlor 24+32, 13, 13
    +
    + vcipher 15, 15, 23
    + vcipher 15, 15, 24
    +
    + xxlor 23+32, 14, 14
    +
    + cmpdi 10, 14
    + beq Do_next_1x
    +
    +Do_next_1x:
    + vcipherlast 15, 15, 23
    +
    + xxlxor 47, 47, 15
    + stxvb16x 47, 0, 9 # store output
    + addi 14, 14, 16
    + addi 9, 9, 16
    +
    + vmr 28, 15
    + ppc_update_hash_1x
    +
    + addi 12, 12, -16
    + addi 11, 11, 16
    + xxlor 19+32, 0, 0
    + vaddudm 30, 30, 31 # IV + counter
    + vxor 15, 30, 19 # add round key
    +
    + bdnz Next_rem_block
    +
    + li 15, 0
    + std 15, 56(7) # clear partial?
    + stxvb16x 30+32, 0, 7 # update IV
    + cmpdi 12, 0
    + beq aes_gcm_out
    +
    +Final_block:
    + lwz 10, 240(6)
    + Loop_aes_middle_1x
    +
    + xxlor 23+32, 10, 10
    +
    + cmpdi 10, 10
    + beq Do_final_1x
    +
    + # 192 bits
    + xxlor 24+32, 11, 11
    +
    + vcipher 15, 15, 23
    + vcipher 15, 15, 24
    +
    + xxlor 23+32, 12, 12
    +
    + cmpdi 10, 12
    + beq Do_final_1x
    +
    + # 256 bits
    + xxlor 24+32, 13, 13
    +
    + vcipher 15, 15, 23
    + vcipher 15, 15, 24
    +
    + xxlor 23+32, 14, 14
    +
    + cmpdi 10, 14
    + beq Do_final_1x
    +
    +Do_final_1x:
    + vcipherlast 15, 15, 23
    +
    + # check partial block
    + li 21, 0 # encrypt
    + ld 15, 56(7) # partial?
    + cmpdi 15, 0
    + beq Normal_block
    + bl Do_partial_block
    +
    + cmpdi 12, 0
    + ble aes_gcm_out
    +
    + b Continue_partial_check
    +
    +Normal_block:
    + lxvb16x 15, 0, 14 # load last block
    + xxlxor 47, 47, 15
    +
    + # create partial block mask
    + li 15, 16
    + sub 15, 15, 12 # index to the mask
    +
    + vspltisb 16, -1 # first 16 bytes - 0xffff...ff
    + vspltisb 17, 0 # second 16 bytes - 0x0000...00
    + li 10, 192
    + stvx 16, 10, 1
    + addi 10, 10, 16
    + stvx 17, 10, 1
    +
    + addi 10, 1, 192
    + lxvb16x 16, 15, 10 # load partial block mask
    + xxland 47, 47, 16
    +
    + vmr 28, 15
    + ppc_update_hash_1x
    +
    + # * should store only the remaining bytes.
    + bl Write_partial_block
    +
    + stxvb16x 30+32, 0, 7 # update IV
    + std 12, 56(7) # update partial?
    + li 16, 16
    +
    + stxvb16x 32, 0, 8 # write out Xi
    + stxvb16x 32, 16, 8 # write out Xi
    + b aes_gcm_out
    +
    + #
    + # Compute data mask
    + #
    +.macro GEN_MASK _mask _start _end
    + vspltisb 16, -1 # first 16 bytes - 0xffff...ff
    + vspltisb 17, 0 # second 16 bytes - 0x0000...00
    + li 10, 192
    + stxvb16x 17+32, 10, 1
    + add 10, 10, \_start
    + stxvb16x 16+32, 10, 1
    + add 10, 10, \_end
    + stxvb16x 17+32, 10, 1
    +
    + addi 10, 1, 192
    + lxvb16x \_mask, 0, 10 # load partial block mask
    +.endm
    +
    + #
    + # Handle multiple partial blocks for encrypt and decrypt
    + # operations.
    + #
    +SYM_FUNC_START_LOCAL(Do_partial_block)
    + add 17, 15, 5
    + cmpdi 17, 16
    + bgt Big_block
    + GEN_MASK 18, 15, 5
    + b _Partial
    +SYM_FUNC_END(Do_partial_block)
    +Big_block:
    + li 16, 16
    + GEN_MASK 18, 15, 16
    +
    +_Partial:
    + lxvb16x 17+32, 0, 14 # load last block
    + sldi 16, 15, 3
    + mtvsrdd 32+16, 0, 16
    + vsro 17, 17, 16
    + xxlxor 47, 47, 17+32
    + xxland 47, 47, 18
    +
    + vxor 0, 0, 0 # clear Xi
    + vmr 28, 15
    +
    + cmpdi 21, 0 # encrypt/decrypt ops?
    + beq Skip_decrypt
    + xxland 32+28, 32+17, 18
    +
    +Skip_decrypt:
    +
    + ppc_update_hash_1x
    +
    + li 16, 16
    + lxvb16x 32+29, 16, 8
    + vxor 0, 0, 29
    + stxvb16x 32, 0, 8 # save Xi
    + stxvb16x 32, 16, 8 # save Xi
    +
    + # store partial block
    + # loop the rest of the stream if any
    + sldi 16, 15, 3
    + mtvsrdd 32+16, 0, 16
    + vslo 15, 15, 16
    + #stxvb16x 15+32, 0, 9 # last block
    +
    + li 16, 16
    + sub 17, 16, 15 # 16 - partial
    +
    + add 16, 15, 5
    + cmpdi 16, 16
    + bgt Larger_16
    + mr 17, 5
    +Larger_16:
    +
    + # write partial
    + li 10, 192
    + stxvb16x 15+32, 10, 1 # save current block
    +
    + addi 10, 9, -1
    + addi 16, 1, 191
    + mtctr 17 # move partial byte count
    +
    +Write_last_partial:
    + lbzu 18, 1(16)
    + stbu 18, 1(10)
    + bdnz Write_last_partial
    + # Complete loop partial
    +
    + add 14, 14, 17
    + add 9, 9, 17
    + sub 12, 12, 17
    + add 11, 11, 17
    +
    + add 15, 15, 5
    + cmpdi 15, 16
    + blt Save_partial
    +
    + vaddudm 30, 30, 31
    + stxvb16x 30+32, 0, 7 # update IV
    + xxlor 32+29, 0, 0
    + vxor 15, 30, 29 # IV + round key - add round key 0
    + li 15, 0
    + std 15, 56(7) # partial done - clear
    + b Partial_done
    +Save_partial:
    + std 15, 56(7) # partial
    +
    +Partial_done:
    + blr
    +
    + #
    + # Write partial block
    + # r9 - output
    + # r12 - remaining bytes
    + # v15 - partial input data
    + #
    +SYM_FUNC_START_LOCAL(Write_partial_block)
    + li 10, 192
    + stxvb16x 15+32, 10, 1 # last block
    +
    + addi 10, 9, -1
    + addi 16, 1, 191
    +
    + mtctr 12 # remaining bytes
    + li 15, 0
    +
    +Write_last_byte:
    + lbzu 14, 1(16)
    + stbu 14, 1(10)
    + bdnz Write_last_byte
    + blr
    +SYM_FUNC_END(Write_partial_block)
    +
    +aes_gcm_out:
    + # out = state
    + stxvb16x 32, 0, 8 # write out Xi
    + add 3, 11, 12 # return count
    +
    + RESTORE_REGS
    + blr
    +
    + #
    + # 8x Decrypt
    + #
    +_GLOBAL(aes_p10_gcm_decrypt)
    +.align 5
    +
    + SAVE_REGS
    +
    + LOAD_HASH_TABLE
    +
    + # initialize ICB: GHASH( IV ), IV - r7
    + lxvb16x 30+32, 0, 7 # load IV - v30
    +
    + mr 12, 5 # length
    + li 11, 0 # block index
    +
    + # counter 1
    + vxor 31, 31, 31
    + vspltisb 22, 1
    + vsldoi 31, 31, 22,1 # counter 1
    +
    + # load round key to VSR
    + lxv 0, 0(6)
    + lxv 1, 0x10(6)
    + lxv 2, 0x20(6)
    + lxv 3, 0x30(6)
    + lxv 4, 0x40(6)
    + lxv 5, 0x50(6)
    + lxv 6, 0x60(6)
    + lxv 7, 0x70(6)
    + lxv 8, 0x80(6)
    + lxv 9, 0x90(6)
    + lxv 10, 0xa0(6)
    +
    + # load rounds - 10 (128), 12 (192), 14 (256)
    + lwz 9,240(6)
    +
    + #
    + # vxor state, state, w # addroundkey
    + xxlor 32+29, 0, 0
    + vxor 15, 30, 29 # IV + round key - add round key 0
    +
    + cmpdi 9, 10
    + beq Loop_aes_gcm_8x_dec
    +
    + # load 2 more round keys (v11, v12)
    + lxv 11, 0xb0(6)
    + lxv 12, 0xc0(6)
    +
    + cmpdi 9, 12
    + beq Loop_aes_gcm_8x_dec
    +
    + # load 2 more round keys (v11, v12, v13, v14)
    + lxv 13, 0xd0(6)
    + lxv 14, 0xe0(6)
    + cmpdi 9, 14
    + beq Loop_aes_gcm_8x_dec
    +
    + b aes_gcm_out
    +
    +.align 5
    +Loop_aes_gcm_8x_dec:
    + mr 14, 3
    + mr 9, 4
    +
    + #
    + # check partial block
    + #
    +Continue_partial_check_dec:
    + ld 15, 56(7)
    + cmpdi 15, 0
    + beq Continue_dec
    + bgt Final_block_dec
    + cmpdi 15, 16
    + blt Final_block_dec
    +
    +Continue_dec:
    + # n blcoks
    + li 10, 128
    + divdu 10, 12, 10 # n 128 bytes-blocks
    + cmpdi 10, 0
    + beq Loop_last_block_dec
    +
    + vaddudm 30, 30, 31 # IV + counter
    + vxor 16, 30, 29
    + vaddudm 30, 30, 31
    + vxor 17, 30, 29
    + vaddudm 30, 30, 31
    + vxor 18, 30, 29
    + vaddudm 30, 30, 31
    + vxor 19, 30, 29
    + vaddudm 30, 30, 31
    + vxor 20, 30, 29
    + vaddudm 30, 30, 31
    + vxor 21, 30, 29
    + vaddudm 30, 30, 31
    + vxor 22, 30, 29
    +
    + mtctr 10
    +
    + li 15, 16
    + li 16, 32
    + li 17, 48
    + li 18, 64
    + li 19, 80
    + li 20, 96
    + li 21, 112
    +
    + lwz 10, 240(6)
    +
    +Loop_8x_block_dec:
    +
    + lxvb16x 15, 0, 14 # load block
    + lxvb16x 16, 15, 14 # load block
    + lxvb16x 17, 16, 14 # load block
    + lxvb16x 18, 17, 14 # load block
    + lxvb16x 19, 18, 14 # load block
    + lxvb16x 20, 19, 14 # load block
    + lxvb16x 21, 20, 14 # load block
    + lxvb16x 22, 21, 14 # load block
    + addi 14, 14, 128
    +
    + Loop_aes_middle8x
    +
    + xxlor 23+32, 10, 10
    +
    + cmpdi 10, 10
    + beq Do_next_ghash_dec
    +
    + # 192 bits
    + xxlor 24+32, 11, 11
    +
    + vcipher 15, 15, 23
    + vcipher 16, 16, 23
    + vcipher 17, 17, 23
    + vcipher 18, 18, 23
    + vcipher 19, 19, 23
    + vcipher 20, 20, 23
    + vcipher 21, 21, 23
    + vcipher 22, 22, 23
    +
    + vcipher 15, 15, 24
    + vcipher 16, 16, 24
    + vcipher 17, 17, 24
    + vcipher 18, 18, 24
    + vcipher 19, 19, 24
    + vcipher 20, 20, 24
    + vcipher 21, 21, 24
    + vcipher 22, 22, 24
    +
    + xxlor 23+32, 12, 12
    +
    + cmpdi 10, 12
    + beq Do_next_ghash_dec
    +
    + # 256 bits
    + xxlor 24+32, 13, 13
    +
    + vcipher 15, 15, 23
    + vcipher 16, 16, 23
    + vcipher 17, 17, 23
    + vcipher 18, 18, 23
    + vcipher 19, 19, 23
    + vcipher 20, 20, 23
    + vcipher 21, 21, 23
    + vcipher 22, 22, 23
    +
    + vcipher 15, 15, 24
    + vcipher 16, 16, 24
    + vcipher 17, 17, 24
    + vcipher 18, 18, 24
    + vcipher 19, 19, 24
    + vcipher 20, 20, 24
    + vcipher 21, 21, 24
    + vcipher 22, 22, 24
    +
    + xxlor 23+32, 14, 14
    +
    + cmpdi 10, 14
    + beq Do_next_ghash_dec
    + b aes_gcm_out
    +
    +Do_next_ghash_dec:
    +
    + #
    + # last round
    + vcipherlast 15, 15, 23
    + vcipherlast 16, 16, 23
    +
    + xxlxor 47, 47, 15
    + stxvb16x 47, 0, 9 # store output
    + xxlxor 48, 48, 16
    + stxvb16x 48, 15, 9 # store output
    +
    + vcipherlast 17, 17, 23
    + vcipherlast 18, 18, 23
    +
    + xxlxor 49, 49, 17
    + stxvb16x 49, 16, 9 # store output
    + xxlxor 50, 50, 18
    + stxvb16x 50, 17, 9 # store output
    +
    + vcipherlast 19, 19, 23
    + vcipherlast 20, 20, 23
    +
    + xxlxor 51, 51, 19
    + stxvb16x 51, 18, 9 # store output
    + xxlxor 52, 52, 20
    + stxvb16x 52, 19, 9 # store output
    +
    + vcipherlast 21, 21, 23
    + vcipherlast 22, 22, 23
    +
    + xxlxor 53, 53, 21
    + stxvb16x 53, 20, 9 # store output
    + xxlxor 54, 54, 22
    + stxvb16x 54, 21, 9 # store output
    +
    + addi 9, 9, 128
    +
    + xxlor 15+32, 15, 15
    + xxlor 16+32, 16, 16
    + xxlor 17+32, 17, 17
    + xxlor 18+32, 18, 18
    + xxlor 19+32, 19, 19
    + xxlor 20+32, 20, 20
    + xxlor 21+32, 21, 21
    + xxlor 22+32, 22, 22
    +
    + # ghash here
    + ppc_aes_gcm_ghash2_4x
    +
    + xxlor 27+32, 0, 0
    + vaddudm 30, 30, 31 # IV + counter
    + vmr 29, 30
    + vxor 15, 30, 27 # add round key
    + vaddudm 30, 30, 31
    + vxor 16, 30, 27
    + vaddudm 30, 30, 31
    + vxor 17, 30, 27
    + vaddudm 30, 30, 31
    + vxor 18, 30, 27
    + vaddudm 30, 30, 31
    + vxor 19, 30, 27
    + vaddudm 30, 30, 31
    + vxor 20, 30, 27
    + vaddudm 30, 30, 31
    + vxor 21, 30, 27
    + vaddudm 30, 30, 31
    + vxor 22, 30, 27
    +
    + addi 12, 12, -128
    + addi 11, 11, 128
    +
    + bdnz Loop_8x_block_dec
    +
    + vmr 30, 29
    + stxvb16x 30+32, 0, 7 # update IV
    +
    +Loop_last_block_dec:
    + cmpdi 12, 0
    + beq aes_gcm_out
    +
    + # loop last few blocks
    + li 10, 16
    + divdu 10, 12, 10
    +
    + mtctr 10
    +
    + lwz 10, 240(6)
    +
    + cmpdi 12, 16
    + blt Final_block_dec
    +
    +Next_rem_block_dec:
    + lxvb16x 15, 0, 14 # load block
    +
    + Loop_aes_middle_1x
    +
    + xxlor 23+32, 10, 10
    +
    + cmpdi 10, 10
    + beq Do_next_1x_dec
    +
    + # 192 bits
    + xxlor 24+32, 11, 11
    +
    + vcipher 15, 15, 23
    + vcipher 15, 15, 24
    +
    + xxlor 23+32, 12, 12
    +
    + cmpdi 10, 12
    + beq Do_next_1x_dec
    +
    + # 256 bits
    + xxlor 24+32, 13, 13
    +
    + vcipher 15, 15, 23
    + vcipher 15, 15, 24
    +
    + xxlor 23+32, 14, 14
    +
    + cmpdi 10, 14
    + beq Do_next_1x_dec
    +
    +Do_next_1x_dec:
    + vcipherlast 15, 15, 23
    +
    + xxlxor 47, 47, 15
    + stxvb16x 47, 0, 9 # store output
    + addi 14, 14, 16
    + addi 9, 9, 16
    +
    + xxlor 28+32, 15, 15
    + #vmr 28, 15
    + ppc_update_hash_1x
    +
    + addi 12, 12, -16
    + addi 11, 11, 16
    + xxlor 19+32, 0, 0
    + vaddudm 30, 30, 31 # IV + counter
    + vxor 15, 30, 19 # add round key
    +
    + bdnz Next_rem_block_dec
    +
    + li 15, 0
    + std 15, 56(7) # clear partial?
    + stxvb16x 30+32, 0, 7 # update IV
    + cmpdi 12, 0
    + beq aes_gcm_out
    +
    +Final_block_dec:
    + lwz 10, 240(6)
    + Loop_aes_middle_1x
    +
    + xxlor 23+32, 10, 10
    +
    + cmpdi 10, 10
    + beq Do_final_1x_dec
    +
    + # 192 bits
    + xxlor 24+32, 11, 11
    +
    + vcipher 15, 15, 23
    + vcipher 15, 15, 24
    +
    + xxlor 23+32, 12, 12
    +
    + cmpdi 10, 12
    + beq Do_final_1x_dec
    +
    + # 256 bits
    + xxlor 24+32, 13, 13
    +
    + vcipher 15, 15, 23
    + vcipher 15, 15, 24
    +
    + xxlor 23+32, 14, 14
    +
    + cmpdi 10, 14
    + beq Do_final_1x_dec
    +
    +Do_final_1x_dec:
    + vcipherlast 15, 15, 23
    +
    + # check partial block
    + li 21, 1 # decrypt
    + ld 15, 56(7) # partial?
    + cmpdi 15, 0
    + beq Normal_block_dec
    + bl Do_partial_block
    + cmpdi 12, 0
    + ble aes_gcm_out
    +
    + b Continue_partial_check_dec
    +
    +Normal_block_dec:
    + lxvb16x 15, 0, 14 # load last block
    + xxlxor 47, 47, 15
    +
    + # create partial block mask
    + li 15, 16
    + sub 15, 15, 12 # index to the mask
    +
    + vspltisb 16, -1 # first 16 bytes - 0xffff...ff
    + vspltisb 17, 0 # second 16 bytes - 0x0000...00
    + li 10, 192
    + stvx 16, 10, 1
    + addi 10, 10, 16
    + stvx 17, 10, 1
    +
    + addi 10, 1, 192
    + lxvb16x 16, 15, 10 # load partial block mask
    + xxland 47, 47, 16
    +
    + xxland 32+28, 15, 16
    + #vmr 28, 15
    + ppc_update_hash_1x
    +
    + # * should store only the remaining bytes.
    + bl Write_partial_block
    +
    + stxvb16x 30+32, 0, 7 # update IV
    + std 12, 56(7) # update partial?
    + li 16, 16
    +
    + stxvb16x 32, 0, 8 # write out Xi
    + stxvb16x 32, 16, 8 # write out Xi
    + b aes_gcm_out
    --
    2.31.1
    \
     
     \ /
      Last update: 2023-03-27 00:29    [W:3.140 / U:0.296 seconds]
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