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crypto: arm/chacha-scalar - switch to common rev_l macro

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Drop the local definition of a byte swapping macro and use the common
one instead.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Nicolas Pitre <nico@fluxnic.net>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2021-03-10 11:14:21 +01:00 committed by Herbert Xu
parent d5adb9d1f7
commit e0ba808db7
1 changed files with 13 additions and 30 deletions
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43
arch/arm/crypto/chacha-scalar-core.S
View file

@ -41,32 +41,15 @@
X14 .req r12
X15 .req r14
.macro __rev out, in, t0, t1, t2
.if __LINUX_ARM_ARCH__ >= 6
rev \out, \in
.else
lsl \t0, \in, #24
and \t1, \in, #0xff00
and \t2, \in, #0xff0000
orr \out, \t0, \in, lsr #24
orr \out, \out, \t1, lsl #8
orr \out, \out, \t2, lsr #8
.endif
.endm
.macro _le32_bswap x, t0, t1, t2
.macro _le32_bswap_4x a, b, c, d, tmp
#ifdef __ARMEB__
__rev \x, \x, \t0, \t1, \t2
rev_l \a, \tmp
rev_l \b, \tmp
rev_l \c, \tmp
rev_l \d, \tmp
#endif
.endm
.macro _le32_bswap_4x a, b, c, d, t0, t1, t2
_le32_bswap \a, \t0, \t1, \t2
_le32_bswap \b, \t0, \t1, \t2
_le32_bswap \c, \t0, \t1, \t2
_le32_bswap \d, \t0, \t1, \t2
.endm
.macro __ldrd a, b, src, offset
#if __LINUX_ARM_ARCH__ >= 6
ldrd \a, \b, [\src, #\offset]
@ -200,7 +183,7 @@
add X1, X1, r9
add X2, X2, r10
add X3, X3, r11
_le32_bswap_4x X0, X1, X2, X3, r8, r9, r10
_le32_bswap_4x X0, X1, X2, X3, r8
ldmia r12!, {r8-r11}
eor X0, X0, r8
eor X1, X1, r9
@ -216,7 +199,7 @@
ldmia r12!, {X0-X3}
add X6, r10, X6, ror #brot
add X7, r11, X7, ror #brot
_le32_bswap_4x X4, X5, X6, X7, r8, r9, r10
_le32_bswap_4x X4, X5, X6, X7, r8
eor X4, X4, X0
eor X5, X5, X1
eor X6, X6, X2
@ -231,7 +214,7 @@
add r1, r1, r9 // x9
add r6, r6, r10 // x10
add r7, r7, r11 // x11
_le32_bswap_4x r0, r1, r6, r7, r8, r9, r10
_le32_bswap_4x r0, r1, r6, r7, r8
ldmia r12!, {r8-r11}
eor r0, r0, r8 // x8
eor r1, r1, r9 // x9
@ -245,7 +228,7 @@
add r3, r9, r3, ror #drot // x13
add r4, r10, r4, ror #drot // x14
add r5, r11, r5, ror #drot // x15
_le32_bswap_4x r2, r3, r4, r5, r9, r10, r11
_le32_bswap_4x r2, r3, r4, r5, r9
ldr r9, [sp, #72] // load LEN
eor r2, r2, r0 // x12
eor r3, r3, r1 // x13
@ -301,7 +284,7 @@
add X1, X1, r9
add X2, X2, r10
add X3, X3, r11
_le32_bswap_4x X0, X1, X2, X3, r8, r9, r10
_le32_bswap_4x X0, X1, X2, X3, r8
stmia r14!, {X0-X3}
// Save keystream for x4-x7
@ -311,7 +294,7 @@
add X5, r9, X5, ror #brot
add X6, r10, X6, ror #brot
add X7, r11, X7, ror #brot
_le32_bswap_4x X4, X5, X6, X7, r8, r9, r10
_le32_bswap_4x X4, X5, X6, X7, r8
add r8, sp, #64
stmia r14!, {X4-X7}
@ -323,7 +306,7 @@
add r1, r1, r9 // x9
add r6, r6, r10 // x10
add r7, r7, r11 // x11
_le32_bswap_4x r0, r1, r6, r7, r8, r9, r10
_le32_bswap_4x r0, r1, r6, r7, r8
stmia r14!, {r0,r1,r6,r7}
__ldrd r8, r9, sp, 144
__ldrd r10, r11, sp, 152
@ -331,7 +314,7 @@
add r3, r9, r3, ror #drot // x13
add r4, r10, r4, ror #drot // x14
add r5, r11, r5, ror #drot // x15
_le32_bswap_4x r2, r3, r4, r5, r9, r10, r11
_le32_bswap_4x r2, r3, r4, r5, r9
stmia r14, {r2-r5}
// Stack: ks0-ks15 unused0-unused7 x0-x15 OUT IN LEN