forked from Minki/linux
e90b1a2be6
The wrapper routines are required when asmlinkage differs from the usual calling convention. So we need to have them. However, by rearranging the parameters, they will get optimised away to a single jump for most people. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
191 lines
4.7 KiB
ArmAsm
191 lines
4.7 KiB
ArmAsm
/* AES (Rijndael) implementation (FIPS PUB 197) for x86_64
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*
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* Copyright (C) 2005 Andreas Steinmetz, <ast@domdv.de>
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*
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* License:
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* This code can be distributed under the terms of the GNU General Public
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* License (GPL) Version 2 provided that the above header down to and
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* including this sentence is retained in full.
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*/
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.extern aes_ft_tab
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.extern aes_it_tab
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.extern aes_fl_tab
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.extern aes_il_tab
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.text
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#include <asm/asm-offsets.h>
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#define BASE crypto_tfm_ctx_offset
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#define R1 %rax
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#define R1E %eax
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#define R1X %ax
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#define R1H %ah
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#define R1L %al
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#define R2 %rbx
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#define R2E %ebx
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#define R2X %bx
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#define R2H %bh
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#define R2L %bl
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#define R3 %rcx
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#define R3E %ecx
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#define R3X %cx
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#define R3H %ch
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#define R3L %cl
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#define R4 %rdx
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#define R4E %edx
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#define R4X %dx
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#define R4H %dh
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#define R4L %dl
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#define R5 %rsi
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#define R5E %esi
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#define R6 %rdi
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#define R6E %edi
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#define R7 %rbp
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#define R7E %ebp
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#define R8 %r8
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#define R9 %r9
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#define R10 %r10
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#define R11 %r11
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#define prologue(FUNC,KEY,B128,B192,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11) \
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.global FUNC; \
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.type FUNC,@function; \
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.align 8; \
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FUNC: movq r1,r2; \
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movq r3,r4; \
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leaq BASE+KEY+52(r8),r9; \
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movq r10,r11; \
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movl (r7),r5 ## E; \
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movl 4(r7),r1 ## E; \
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movl 8(r7),r6 ## E; \
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movl 12(r7),r7 ## E; \
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movl BASE(r8),r10 ## E; \
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xorl -48(r9),r5 ## E; \
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xorl -44(r9),r1 ## E; \
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xorl -40(r9),r6 ## E; \
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xorl -36(r9),r7 ## E; \
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cmpl $24,r10 ## E; \
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jb B128; \
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leaq 32(r9),r9; \
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je B192; \
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leaq 32(r9),r9;
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#define epilogue(r1,r2,r3,r4,r5,r6,r7,r8,r9) \
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movq r1,r2; \
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movq r3,r4; \
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movl r5 ## E,(r9); \
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movl r6 ## E,4(r9); \
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movl r7 ## E,8(r9); \
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movl r8 ## E,12(r9); \
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ret;
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#define round(TAB,OFFSET,r1,r2,r3,r4,r5,r6,r7,r8,ra,rb,rc,rd) \
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movzbl r2 ## H,r5 ## E; \
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movzbl r2 ## L,r6 ## E; \
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movl TAB+1024(,r5,4),r5 ## E;\
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movw r4 ## X,r2 ## X; \
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movl TAB(,r6,4),r6 ## E; \
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roll $16,r2 ## E; \
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shrl $16,r4 ## E; \
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movzbl r4 ## H,r7 ## E; \
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movzbl r4 ## L,r4 ## E; \
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xorl OFFSET(r8),ra ## E; \
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xorl OFFSET+4(r8),rb ## E; \
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xorl TAB+3072(,r7,4),r5 ## E;\
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xorl TAB+2048(,r4,4),r6 ## E;\
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movzbl r1 ## L,r7 ## E; \
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movzbl r1 ## H,r4 ## E; \
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movl TAB+1024(,r4,4),r4 ## E;\
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movw r3 ## X,r1 ## X; \
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roll $16,r1 ## E; \
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shrl $16,r3 ## E; \
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xorl TAB(,r7,4),r5 ## E; \
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movzbl r3 ## H,r7 ## E; \
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movzbl r3 ## L,r3 ## E; \
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xorl TAB+3072(,r7,4),r4 ## E;\
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xorl TAB+2048(,r3,4),r5 ## E;\
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movzbl r1 ## H,r7 ## E; \
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movzbl r1 ## L,r3 ## E; \
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shrl $16,r1 ## E; \
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xorl TAB+3072(,r7,4),r6 ## E;\
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movl TAB+2048(,r3,4),r3 ## E;\
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movzbl r1 ## H,r7 ## E; \
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movzbl r1 ## L,r1 ## E; \
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xorl TAB+1024(,r7,4),r6 ## E;\
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xorl TAB(,r1,4),r3 ## E; \
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movzbl r2 ## H,r1 ## E; \
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movzbl r2 ## L,r7 ## E; \
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shrl $16,r2 ## E; \
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xorl TAB+3072(,r1,4),r3 ## E;\
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xorl TAB+2048(,r7,4),r4 ## E;\
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movzbl r2 ## H,r1 ## E; \
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movzbl r2 ## L,r2 ## E; \
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xorl OFFSET+8(r8),rc ## E; \
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xorl OFFSET+12(r8),rd ## E; \
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xorl TAB+1024(,r1,4),r3 ## E;\
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xorl TAB(,r2,4),r4 ## E;
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#define move_regs(r1,r2,r3,r4) \
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movl r3 ## E,r1 ## E; \
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movl r4 ## E,r2 ## E;
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#define entry(FUNC,KEY,B128,B192) \
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prologue(FUNC,KEY,B128,B192,R2,R8,R7,R9,R1,R3,R4,R6,R10,R5,R11)
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#define return epilogue(R8,R2,R9,R7,R5,R6,R3,R4,R11)
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#define encrypt_round(TAB,OFFSET) \
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round(TAB,OFFSET,R1,R2,R3,R4,R5,R6,R7,R10,R5,R6,R3,R4) \
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move_regs(R1,R2,R5,R6)
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#define encrypt_final(TAB,OFFSET) \
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round(TAB,OFFSET,R1,R2,R3,R4,R5,R6,R7,R10,R5,R6,R3,R4)
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#define decrypt_round(TAB,OFFSET) \
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round(TAB,OFFSET,R2,R1,R4,R3,R6,R5,R7,R10,R5,R6,R3,R4) \
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move_regs(R1,R2,R5,R6)
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#define decrypt_final(TAB,OFFSET) \
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round(TAB,OFFSET,R2,R1,R4,R3,R6,R5,R7,R10,R5,R6,R3,R4)
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/* void aes_enc_blk(stuct crypto_tfm *tfm, u8 *out, const u8 *in) */
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entry(aes_enc_blk,0,enc128,enc192)
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encrypt_round(aes_ft_tab,-96)
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encrypt_round(aes_ft_tab,-80)
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enc192: encrypt_round(aes_ft_tab,-64)
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encrypt_round(aes_ft_tab,-48)
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enc128: encrypt_round(aes_ft_tab,-32)
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encrypt_round(aes_ft_tab,-16)
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encrypt_round(aes_ft_tab, 0)
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encrypt_round(aes_ft_tab, 16)
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encrypt_round(aes_ft_tab, 32)
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encrypt_round(aes_ft_tab, 48)
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encrypt_round(aes_ft_tab, 64)
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encrypt_round(aes_ft_tab, 80)
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encrypt_round(aes_ft_tab, 96)
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encrypt_final(aes_fl_tab,112)
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return
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/* void aes_dec_blk(struct crypto_tfm *tfm, u8 *out, const u8 *in) */
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entry(aes_dec_blk,240,dec128,dec192)
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decrypt_round(aes_it_tab,-96)
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decrypt_round(aes_it_tab,-80)
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dec192: decrypt_round(aes_it_tab,-64)
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decrypt_round(aes_it_tab,-48)
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dec128: decrypt_round(aes_it_tab,-32)
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decrypt_round(aes_it_tab,-16)
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decrypt_round(aes_it_tab, 0)
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decrypt_round(aes_it_tab, 16)
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decrypt_round(aes_it_tab, 32)
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decrypt_round(aes_it_tab, 48)
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decrypt_round(aes_it_tab, 64)
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decrypt_round(aes_it_tab, 80)
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decrypt_round(aes_it_tab, 96)
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decrypt_final(aes_il_tab,112)
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return
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