#include "arm_arch.h"
#if defined(__thumb2__) || defined(__clang__)
.syntax unified
#define ldrplb ldrbpl
#define ldrneb ldrbne
#endif
#if defined(__thumb2__)
.thumb
#else
.code 32
#endif
.text
.type rem_4bit,%object
.align 5
rem_4bit:
.short 0x0000,0x1C20,0x3840,0x2460
.short 0x7080,0x6CA0,0x48C0,0x54E0
.short 0xE100,0xFD20,0xD940,0xC560
.short 0x9180,0x8DA0,0xA9C0,0xB5E0
.size rem_4bit,.-rem_4bit
.type rem_4bit_get,%function
rem_4bit_get:
#if defined(__thumb2__)
adr r2,rem_4bit
#else
sub r2,pc,#8+32 @ &rem_4bit
#endif
b .Lrem_4bit_got
nop
nop
.size rem_4bit_get,.-rem_4bit_get
.globl gcm_ghash_4bit
.type gcm_ghash_4bit,%function
.align 4
gcm_ghash_4bit:
#if defined(__thumb2__)
adr r12,rem_4bit
#else
sub r12,pc,#8+48 @ &rem_4bit
#endif
add r3,r2,r3 @ r3 to point at the end
stmdb sp!,{r3,r4,r5,r6,r7,r8,r9,r10,r11,lr} @ save r3/end too
ldmia r12,{r4,r5,r6,r7,r8,r9,r10,r11} @ copy rem_4bit ...
stmdb sp!,{r4,r5,r6,r7,r8,r9,r10,r11} @ ... to stack
ldrb r12,[r2,#15]
ldrb r14,[r0,#15]
.Louter:
eor r12,r12,r14
and r14,r12,#0xf0
and r12,r12,#0x0f
mov r3,#14
add r7,r1,r12,lsl#4
ldmia r7,{r4,r5,r6,r7} @ load Htbl[nlo]
add r11,r1,r14
ldrb r12,[r2,#14]
and r14,r4,#0xf @ rem
ldmia r11,{r8,r9,r10,r11} @ load Htbl[nhi]
add r14,r14,r14
eor r4,r8,r4,lsr#4
ldrh r8,[sp,r14] @ rem_4bit[rem]
eor r4,r4,r5,lsl#28
ldrb r14,[r0,#14]
eor r5,r9,r5,lsr#4
eor r5,r5,r6,lsl#28
eor r6,r10,r6,lsr#4
eor r6,r6,r7,lsl#28
eor r7,r11,r7,lsr#4
eor r12,r12,r14
and r14,r12,#0xf0
and r12,r12,#0x0f
eor r7,r7,r8,lsl#16
.Linner:
add r11,r1,r12,lsl#4
and r12,r4,#0xf @ rem
subs r3,r3,#1
add r12,r12,r12
ldmia r11,{r8,r9,r10,r11} @ load Htbl[nlo]
eor r4,r8,r4,lsr#4
eor r4,r4,r5,lsl#28
eor r5,r9,r5,lsr#4
eor r5,r5,r6,lsl#28
ldrh r8,[sp,r12] @ rem_4bit[rem]
eor r6,r10,r6,lsr#4
#ifdef __thumb2__
it pl
#endif
ldrplb r12,[r2,r3]
eor r6,r6,r7,lsl#28
eor r7,r11,r7,lsr#4
add r11,r1,r14
and r14,r4,#0xf @ rem
eor r7,r7,r8,lsl#16 @ ^= rem_4bit[rem]
add r14,r14,r14
ldmia r11,{r8,r9,r10,r11} @ load Htbl[nhi]
eor r4,r8,r4,lsr#4
#ifdef __thumb2__
it pl
#endif
ldrplb r8,[r0,r3]
eor r4,r4,r5,lsl#28
eor r5,r9,r5,lsr#4
ldrh r9,[sp,r14]
eor r5,r5,r6,lsl#28
eor r6,r10,r6,lsr#4
eor r6,r6,r7,lsl#28
#ifdef __thumb2__
it pl
#endif
eorpl r12,r12,r8
eor r7,r11,r7,lsr#4
#ifdef __thumb2__
itt pl
#endif
andpl r14,r12,#0xf0
andpl r12,r12,#0x0f
eor r7,r7,r9,lsl#16 @ ^= rem_4bit[rem]
bpl .Linner
ldr r3,[sp,#32] @ re-load r3/end
add r2,r2,#16
mov r14,r4
#if __ARM_ARCH__>=7 && defined(__ARMEL__)
rev r4,r4
str r4,[r0,#12]
#elif defined(__ARMEB__)
str r4,[r0,#12]
#else
mov r9,r4,lsr#8
strb r4,[r0,#12+3]
mov r10,r4,lsr#16
strb r9,[r0,#12+2]
mov r11,r4,lsr#24
strb r10,[r0,#12+1]
strb r11,[r0,#12]
#endif
cmp r2,r3
#if __ARM_ARCH__>=7 && defined(__ARMEL__)
rev r5,r5
str r5,[r0,#8]
#elif defined(__ARMEB__)
str r5,[r0,#8]
#else
mov r9,r5,lsr#8
strb r5,[r0,#8+3]
mov r10,r5,lsr#16
strb r9,[r0,#8+2]
mov r11,r5,lsr#24
strb r10,[r0,#8+1]
strb r11,[r0,#8]
#endif
#ifdef __thumb2__
it ne
#endif
ldrneb r12,[r2,#15]
#if __ARM_ARCH__>=7 && defined(__ARMEL__)
rev r6,r6
str r6,[r0,#4]
#elif defined(__ARMEB__)
str r6,[r0,#4]
#else
mov r9,r6,lsr#8
strb r6,[r0,#4+3]
mov r10,r6,lsr#16
strb r9,[r0,#4+2]
mov r11,r6,lsr#24
strb r10,[r0,#4+1]
strb r11,[r0,#4]
#endif
#if __ARM_ARCH__>=7 && defined(__ARMEL__)
rev r7,r7
str r7,[r0,#0]
#elif defined(__ARMEB__)
str r7,[r0,#0]
#else
mov r9,r7,lsr#8
strb r7,[r0,#0+3]
mov r10,r7,lsr#16
strb r9,[r0,#0+2]
mov r11,r7,lsr#24
strb r10,[r0,#0+1]
strb r11,[r0,#0]
#endif
bne .Louter
add sp,sp,#36
#if __ARM_ARCH__>=5
ldmia sp!,{r4,r5,r6,r7,r8,r9,r10,r11,pc}
#else
ldmia sp!,{r4,r5,r6,r7,r8,r9,r10,r11,lr}
tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
.word 0xe12fff1e @ interoperable with Thumb ISA:-)
#endif
.size gcm_ghash_4bit,.-gcm_ghash_4bit
.globl gcm_gmult_4bit
.type gcm_gmult_4bit,%function
gcm_gmult_4bit:
stmdb sp!,{r4,r5,r6,r7,r8,r9,r10,r11,lr}
ldrb r12,[r0,#15]
b rem_4bit_get
.Lrem_4bit_got:
and r14,r12,#0xf0
and r12,r12,#0x0f
mov r3,#14
add r7,r1,r12,lsl#4
ldmia r7,{r4,r5,r6,r7} @ load Htbl[nlo]
ldrb r12,[r0,#14]
add r11,r1,r14
and r14,r4,#0xf @ rem
ldmia r11,{r8,r9,r10,r11} @ load Htbl[nhi]
add r14,r14,r14
eor r4,r8,r4,lsr#4
ldrh r8,[r2,r14] @ rem_4bit[rem]
eor r4,r4,r5,lsl#28
eor r5,r9,r5,lsr#4
eor r5,r5,r6,lsl#28
eor r6,r10,r6,lsr#4
eor r6,r6,r7,lsl#28
eor r7,r11,r7,lsr#4
and r14,r12,#0xf0
eor r7,r7,r8,lsl#16
and r12,r12,#0x0f
.Loop:
add r11,r1,r12,lsl#4
and r12,r4,#0xf @ rem
subs r3,r3,#1
add r12,r12,r12
ldmia r11,{r8,r9,r10,r11} @ load Htbl[nlo]
eor r4,r8,r4,lsr#4
eor r4,r4,r5,lsl#28
eor r5,r9,r5,lsr#4
eor r5,r5,r6,lsl#28
ldrh r8,[r2,r12] @ rem_4bit[rem]
eor r6,r10,r6,lsr#4
#ifdef __thumb2__
it pl
#endif
ldrplb r12,[r0,r3]
eor r6,r6,r7,lsl#28
eor r7,r11,r7,lsr#4
add r11,r1,r14
and r14,r4,#0xf @ rem
eor r7,r7,r8,lsl#16 @ ^= rem_4bit[rem]
add r14,r14,r14
ldmia r11,{r8,r9,r10,r11} @ load Htbl[nhi]
eor r4,r8,r4,lsr#4
eor r4,r4,r5,lsl#28
eor r5,r9,r5,lsr#4
ldrh r8,[r2,r14] @ rem_4bit[rem]
eor r5,r5,r6,lsl#28
eor r6,r10,r6,lsr#4
eor r6,r6,r7,lsl#28
eor r7,r11,r7,lsr#4
#ifdef __thumb2__
itt pl
#endif
andpl r14,r12,#0xf0
andpl r12,r12,#0x0f
eor r7,r7,r8,lsl#16 @ ^= rem_4bit[rem]
bpl .Loop
#if __ARM_ARCH__>=7 && defined(__ARMEL__)
rev r4,r4
str r4,[r0,#12]
#elif defined(__ARMEB__)
str r4,[r0,#12]
#else
mov r9,r4,lsr#8
strb r4,[r0,#12+3]
mov r10,r4,lsr#16
strb r9,[r0,#12+2]
mov r11,r4,lsr#24
strb r10,[r0,#12+1]
strb r11,[r0,#12]
#endif
#if __ARM_ARCH__>=7 && defined(__ARMEL__)
rev r5,r5
str r5,[r0,#8]
#elif defined(__ARMEB__)
str r5,[r0,#8]
#else
mov r9,r5,lsr#8
strb r5,[r0,#8+3]
mov r10,r5,lsr#16
strb r9,[r0,#8+2]
mov r11,r5,lsr#24
strb r10,[r0,#8+1]
strb r11,[r0,#8]
#endif
#if __ARM_ARCH__>=7 && defined(__ARMEL__)
rev r6,r6
str r6,[r0,#4]
#elif defined(__ARMEB__)
str r6,[r0,#4]
#else
mov r9,r6,lsr#8
strb r6,[r0,#4+3]
mov r10,r6,lsr#16
strb r9,[r0,#4+2]
mov r11,r6,lsr#24
strb r10,[r0,#4+1]
strb r11,[r0,#4]
#endif
#if __ARM_ARCH__>=7 && defined(__ARMEL__)
rev r7,r7
str r7,[r0,#0]
#elif defined(__ARMEB__)
str r7,[r0,#0]
#else
mov r9,r7,lsr#8
strb r7,[r0,#0+3]
mov r10,r7,lsr#16
strb r9,[r0,#0+2]
mov r11,r7,lsr#24
strb r10,[r0,#0+1]
strb r11,[r0,#0]
#endif
#if __ARM_ARCH__>=5
ldmia sp!,{r4,r5,r6,r7,r8,r9,r10,r11,pc}
#else
ldmia sp!,{r4,r5,r6,r7,r8,r9,r10,r11,lr}
tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
.word 0xe12fff1e @ interoperable with Thumb ISA:-)
#endif
.size gcm_gmult_4bit,.-gcm_gmult_4bit
#if __ARM_MAX_ARCH__>=7
.arch armv7-a
.fpu neon
.globl gcm_init_neon
.type gcm_init_neon,%function
.align 4
gcm_init_neon:
vld1.64 d7,[r1]! @ load H
vmov.i8 q8,#0xe1
vld1.64 d6,[r1]
vshl.i64 d17,#57
vshr.u64 d16,#63 @ t0=0xc2....01
vdup.8 q9,d7[7]
vshr.u64 d26,d6,#63
vshr.s8 q9,#7 @ broadcast carry bit
vshl.i64 q3,q3,#1
vand q8,q8,q9
vorr d7,d26 @ H<<<=1
veor q3,q3,q8 @ twisted H
vstmia r0,{q3}
bx lr @ bx lr
.size gcm_init_neon,.-gcm_init_neon
.globl gcm_gmult_neon
.type gcm_gmult_neon,%function
.align 4
gcm_gmult_neon:
vld1.64 d7,[r0]! @ load Xi
vld1.64 d6,[r0]!
vmov.i64 d29,#0x0000ffffffffffff
vldmia r1,{d26,d27} @ load twisted H
vmov.i64 d30,#0x00000000ffffffff
#ifdef __ARMEL__
vrev64.8 q3,q3
#endif
vmov.i64 d31,#0x000000000000ffff
veor d28,d26,d27 @ Karatsuba pre-processing
mov r3,#16
b .Lgmult_neon
.size gcm_gmult_neon,.-gcm_gmult_neon
.globl gcm_ghash_neon
.type gcm_ghash_neon,%function
.align 4
gcm_ghash_neon:
vld1.64 d1,[r0]! @ load Xi
vld1.64 d0,[r0]!
vmov.i64 d29,#0x0000ffffffffffff
vldmia r1,{d26,d27} @ load twisted H
vmov.i64 d30,#0x00000000ffffffff
#ifdef __ARMEL__
vrev64.8 q0,q0
#endif
vmov.i64 d31,#0x000000000000ffff
veor d28,d26,d27 @ Karatsuba pre-processing
.Loop_neon:
vld1.64 d7,[r2]! @ load inp
vld1.64 d6,[r2]!
#ifdef __ARMEL__
vrev64.8 q3,q3
#endif
veor q3,q0 @ inp^=Xi
.Lgmult_neon:
vext.8 d16, d26, d26, #1 @ A1
vmull.p8 q8, d16, d6 @ F = A1*B
vext.8 d0, d6, d6, #1 @ B1
vmull.p8 q0, d26, d0 @ E = A*B1
vext.8 d18, d26, d26, #2 @ A2
vmull.p8 q9, d18, d6 @ H = A2*B
vext.8 d22, d6, d6, #2 @ B2
vmull.p8 q11, d26, d22 @ G = A*B2
vext.8 d20, d26, d26, #3 @ A3
veor q8, q8, q0 @ L = E + F
vmull.p8 q10, d20, d6 @ J = A3*B
vext.8 d0, d6, d6, #3 @ B3
veor q9, q9, q11 @ M = G + H
vmull.p8 q0, d26, d0 @ I = A*B3
veor d16, d16, d17 @ t0 = (L) (P0 + P1) << 8
vand d17, d17, d29
vext.8 d22, d6, d6, #4 @ B4
veor d18, d18, d19 @ t1 = (M) (P2 + P3) << 16
vand d19, d19, d30
vmull.p8 q11, d26, d22 @ K = A*B4
veor q10, q10, q0 @ N = I + J
veor d16, d16, d17
veor d18, d18, d19
veor d20, d20, d21 @ t2 = (N) (P4 + P5) << 24
vand d21, d21, d31
vext.8 q8, q8, q8, #15
veor d22, d22, d23 @ t3 = (K) (P6 + P7) << 32
vmov.i64 d23, #0
vext.8 q9, q9, q9, #14
veor d20, d20, d21
vmull.p8 q0, d26, d6 @ D = A*B
vext.8 q11, q11, q11, #12
vext.8 q10, q10, q10, #13
veor q8, q8, q9
veor q10, q10, q11
veor q0, q0, q8
veor q0, q0, q10
veor d6,d6,d7 @ Karatsuba pre-processing
vext.8 d16, d28, d28, #1 @ A1
vmull.p8 q8, d16, d6 @ F = A1*B
vext.8 d2, d6, d6, #1 @ B1
vmull.p8 q1, d28, d2 @ E = A*B1
vext.8 d18, d28, d28, #2 @ A2
vmull.p8 q9, d18, d6 @ H = A2*B
vext.8 d22, d6, d6, #2 @ B2
vmull.p8 q11, d28, d22 @ G = A*B2
vext.8 d20, d28, d28, #3 @ A3
veor q8, q8, q1 @ L = E + F
vmull.p8 q10, d20, d6 @ J = A3*B
vext.8 d2, d6, d6, #3 @ B3
veor q9, q9, q11 @ M = G + H
vmull.p8 q1, d28, d2 @ I = A*B3
veor d16, d16, d17 @ t0 = (L) (P0 + P1) << 8
vand d17, d17, d29
vext.8 d22, d6, d6, #4 @ B4
veor d18, d18, d19 @ t1 = (M) (P2 + P3) << 16
vand d19, d19, d30
vmull.p8 q11, d28, d22 @ K = A*B4
veor q10, q10, q1 @ N = I + J
veor d16, d16, d17
veor d18, d18, d19
veor d20, d20, d21 @ t2 = (N) (P4 + P5) << 24
vand d21, d21, d31
vext.8 q8, q8, q8, #15
veor d22, d22, d23 @ t3 = (K) (P6 + P7) << 32
vmov.i64 d23, #0
vext.8 q9, q9, q9, #14
veor d20, d20, d21
vmull.p8 q1, d28, d6 @ D = A*B
vext.8 q11, q11, q11, #12
vext.8 q10, q10, q10, #13
veor q8, q8, q9
veor q10, q10, q11
veor q1, q1, q8
veor q1, q1, q10
vext.8 d16, d27, d27, #1 @ A1
vmull.p8 q8, d16, d7 @ F = A1*B
vext.8 d4, d7, d7, #1 @ B1
vmull.p8 q2, d27, d4 @ E = A*B1
vext.8 d18, d27, d27, #2 @ A2
vmull.p8 q9, d18, d7 @ H = A2*B
vext.8 d22, d7, d7, #2 @ B2
vmull.p8 q11, d27, d22 @ G = A*B2
vext.8 d20, d27, d27, #3 @ A3
veor q8, q8, q2 @ L = E + F
vmull.p8 q10, d20, d7 @ J = A3*B
vext.8 d4, d7, d7, #3 @ B3
veor q9, q9, q11 @ M = G + H
vmull.p8 q2, d27, d4 @ I = A*B3
veor d16, d16, d17 @ t0 = (L) (P0 + P1) << 8
vand d17, d17, d29
vext.8 d22, d7, d7, #4 @ B4
veor d18, d18, d19 @ t1 = (M) (P2 + P3) << 16
vand d19, d19, d30
vmull.p8 q11, d27, d22 @ K = A*B4
veor q10, q10, q2 @ N = I + J
veor d16, d16, d17
veor d18, d18, d19
veor d20, d20, d21 @ t2 = (N) (P4 + P5) << 24
vand d21, d21, d31
vext.8 q8, q8, q8, #15
veor d22, d22, d23 @ t3 = (K) (P6 + P7) << 32
vmov.i64 d23, #0
vext.8 q9, q9, q9, #14
veor d20, d20, d21
vmull.p8 q2, d27, d7 @ D = A*B
vext.8 q11, q11, q11, #12
vext.8 q10, q10, q10, #13
veor q8, q8, q9
veor q10, q10, q11
veor q2, q2, q8
veor q2, q2, q10
veor q1,q1,q0 @ Karatsuba post-processing
veor q1,q1,q2
veor d1,d1,d2
veor d4,d4,d3 @ Xh|Xl - 256-bit result
@ equivalent of reduction_avx from ghash-x86_64.pl
vshl.i64 q9,q0,#57 @ 1st phase
vshl.i64 q10,q0,#62
veor q10,q10,q9 @
vshl.i64 q9,q0,#63
veor q10, q10, q9 @
veor d1,d1,d20 @
veor d4,d4,d21
vshr.u64 q10,q0,#1 @ 2nd phase
veor q2,q2,q0
veor q0,q0,q10 @
vshr.u64 q10,q10,#6
vshr.u64 q0,q0,#1 @
veor q0,q0,q2 @
veor q0,q0,q10 @
subs r3,#16
bne .Loop_neon
#ifdef __ARMEL__
vrev64.8 q0,q0
#endif
sub r0,#16
vst1.64 d1,[r0]! @ write out Xi
vst1.64 d0,[r0]
bx lr @ bx lr
.size gcm_ghash_neon,.-gcm_ghash_neon
#endif
.byte 71,72,65,83,72,32,102,111,114,32,65,82,77,118,52,47,78,69,79,78,44,32,67,82,89,80,84,79,71,65,77,83,32,98,121,32,60,97,112,112,114,111,64,111,112,101,110,115,115,108,46,111,114,103,62,0
.align 2
.align 2
