From: Ard Biesheuvel <ardb@kernel.org>
To: linux-crypto@vger.kernel.org
Cc: herbert@gondor.apana.org.au, Ard Biesheuvel <ardb@kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Nicolas Pitre <nico@fluxnic.net>,
Eric Biggers <ebiggers@google.com>,
Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH v2 2/2] crypto: arm/chacha-scalar - switch to common rev_32 macro
Date: Sun, 7 Mar 2021 17:54:24 +0100 [thread overview]
Message-ID: <20210307165424.165188-3-ardb@kernel.org> (raw)
In-Reply-To: <20210307165424.165188-1-ardb@kernel.org>
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>
---
arch/arm/crypto/chacha-scalar-core.S | 43 ++++++--------------
1 file changed, 13 insertions(+), 30 deletions(-)
diff --git a/arch/arm/crypto/chacha-scalar-core.S b/arch/arm/crypto/chacha-scalar-core.S
index 2985b80a45b5..083fe1ab96d0 100644
--- a/arch/arm/crypto/chacha-scalar-core.S
+++ b/arch/arm/crypto/chacha-scalar-core.S
@@ -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
--
2.30.1
next prev parent reply other threads:[~2021-03-07 16:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-07 16:54 [PATCH v2 0/2] crypto: arm - clean up redundant helper macros Ard Biesheuvel
2021-03-07 16:54 ` [PATCH v2 1/2] crypto: arm/aes-scalar - switch to common rev_32/mov_l macros Ard Biesheuvel
2021-03-10 7:09 ` Eric Biggers
2021-03-10 7:21 ` Ard Biesheuvel
2021-03-07 16:54 ` Ard Biesheuvel [this message]
2021-03-10 7:07 ` [PATCH v2 2/2] crypto: arm/chacha-scalar - switch to common rev_32 macro Eric Biggers
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