+/* bmw_small-asm.S */
+/*
+ This file is part of the ARM-Crypto-Lib.
+ Copyright (C) 2006-2010 Daniel Otte (daniel.otte@rub.de)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+ * \file bmw_small-asm.S
+ * \author Daniel Otte
+ * \email daniel.otte@rub.de
+ * \date 2010-05-23
+ * \license GPLv3 or later
+ *
+ */
+.syntax unified
+.text
+.thumb
+.align 2
+.thumb_func
+ /*
+#define S32_1(x) ( (SHR32((x), 1)) ^ \
+ (SHL32((x), 2)) ^ \
+ (ROTL32((x), 8)) ^ \
+ (ROTR32((x), 9)) )
+
+#define S32_2(x) ( (SHR32((x), 2)) ^ \
+ (SHL32((x), 1)) ^ \
+ (ROTL32((x), 12)) ^ \
+ (ROTR32((x), 7)) )
+
+#define S32_3(x) ( (SHR32((x), 2)) ^ \
+ (SHL32((x), 2)) ^ \
+ (ROTL32((x), 15)) ^ \
+ (ROTR32((x), 3)) )
+
+#define S32_4(x) ( (SHR32((x), 1)) ^ (x))
+
+#define S32_5(x) ( (SHR32((x), 2)) ^ (x))
+
+*/
+
+.global bmw_s32_0
+.text
+.thumb
+.align 2
+.thumb_func
+.type bmw_s32_0, %function
+bmw_s32_0:
+ mov r1, r0
+ lsrs r0, r0, #1
+ eor r0, r0, r1, lsl #3
+ eor r0, r0, r1, ror #28
+ eor r0, r0, r1, ror #13
+ bx lr
+
+.global bmw_s32_1
+.text
+.thumb
+.align 2
+.thumb_func
+.type bmw_s32_1, %function
+bmw_s32_1:
+ mov r1, r0
+ lsrs r0, r0, #1
+ eor r0, r0, r1, lsl #2
+ eor r0, r0, r1, ror #24
+ eor r0, r0, r1, ror #9
+ bx lr
+
+.global bmw_s32_2
+.text
+.thumb
+.align 2
+.thumb_func
+.type bmw_s32_2, %function
+bmw_s32_2:
+ mov r1, r0
+ lsrs r0, r0, #2
+ eor r0, r0, r1, lsl #1
+ eor r0, r0, r1, ror #20
+ eor r0, r0, r1, ror #7
+ bx lr
+
+.global bmw_s32_3
+.text
+.thumb
+.align 2
+.thumb_func
+.type bmw_s32_3, %function
+bmw_s32_3:
+ mov r1, r0
+ lsrs r0, r0, #2
+ eor r0, r0, r1, lsl #2
+ eor r0, r0, r1, ror #17
+ eor r0, r0, r1, ror #3
+ bx lr
+
+.global bmw_s32_4
+.text
+.thumb
+.align 2
+.thumb_func
+.type bmw_s32_4, %function
+bmw_s32_4:
+ eor r0, r0, r0, lsr #1
+ bx lr
+
+.global bmw_s32_5
+.text
+.thumb
+.align 2
+.thumb_func
+.type bmw_s32_5, %function
+bmw_s32_5:
+ eor r0, r0, r0, lsr #2
+ bx lr
+
+
+
+.global bmw_small_f0
+.text
+.thumb
+.align 2
+.thumb_func
+.type bmw_small_f0, %function
+/*
+ * param q: r0
+ * param h: r1
+ * param m: r2
+ */
+bmw_small_f0:
+ push {r4-r11, r14}
+ sub sp, sp, #64
+ mov r3, sp
+ adds r3, r3, #4
+10:
+ ldmia r1!, {r4,r6,r8,r10}
+ ldmia r2!, {r5,r7,r9,r11}
+ eors r4, r5
+ eors r6, r7
+ eors r8, r9
+ eors r10, r11
+ stmia r3!, {r4,r6,r8,r10}
+
+ ldmia r1!, {r4,r6,r8,r10}
+ ldmia r2!, {r5,r7,r9,r11}
+ eors r4, r5
+ eors r6, r7
+ eors r8, r9
+ eors r10, r11
+ stmia r3!, {r4,r6,r8,r10}
+
+ ldmia r1!, {r4,r6,r8,r10}
+ ldmia r2!, {r5,r7,r9,r11}
+ eors r4, r5
+ eors r6, r7
+ eors r8, r9
+ eors r10, r11
+ stmia r3!, {r4,r6,r8,r10}
+
+ ldmia r1!, {r4,r6,r8,r10}
+ ldmia r2!, {r5,r7,r9,r11}
+ eors r4, r5
+ eors r6, r7
+ eors r8, r9
+ eors r10, r11
+ stmia r3!, {r4,r6,r8,r10}
+/* --- */
+ subs r1, r1, #64
+ subs r3, r3, #64
+/*
+ q[ 0] = (+ h[ 5] - h[ 7] + h[10] + h[13] + h[14]);
+ q[ 3] = (+ h[ 8] - h[10] + h[13] + h[ 0] - h[ 1]);
+ q[ 6] = (- h[11] + h[13] - h[ 0] - h[ 3] + h[ 4]);
+ q[ 9] = (+ h[14] + h[ 0] - h[ 3] + h[ 6] - h[ 7]);
+ q[12] = (+ h[ 1] + h[ 3] - h[ 6] - h[ 9] + h[10]);
+ q[15] = (- h[ 4] - h[ 6] - h[ 9] + h[12] + h[13]);
+ q[ 2] = (+ h[ 7] + h[ 9] - h[12] + h[15] + h[ 0]);
+ q[ 5] = (+ h[10] - h[12] + h[15] - h[ 2] + h[ 3]);
+ q[ 8] = (+ h[13] - h[15] + h[ 2] - h[ 5] - h[ 6]);
+ q[11] = (- h[ 0] - h[ 2] - h[ 5] + h[ 8] + h[ 9]);
+ q[14] = (+ h[ 3] - h[ 5] + h[ 8] - h[11] - h[12]);
+ q[ 1] = (+ h[ 6] - h[ 8] + h[11] + h[14] - h[15]);
+ q[ 4] = (+ h[ 9] - h[11] - h[14] + h[ 1] + h[ 2]);
+ q[ 7] = (- h[12] - h[14] + h[ 1] - h[ 4] - h[ 5]);
+ q[10] = (+ h[15] - h[ 1] - h[ 4] - h[ 7] + h[ 8]);
+ q[13] = (+ h[ 2] + h[ 4] + h[ 7] + h[10] + h[11]);
+*/
+ ldr r4, [r3, #(5*4)]
+ ldr r5, [r3, #(7*4)]
+ ldr r6, [r3, #(10*4)]
+ ldr r7, [r3, #(13*4)]
+ ldr r8, [r3, #(14*4)]
+ ldr r9, [r3, #(8*4)]
+ ldr r10, [r3, #(11*4)]
+ subs r2, r4, r5
+ adds r2, r2, r6
+ adds r2, r2, r7
+ adds r2, r2, r8
+ str r2, [r0, #0]
+ ldr r4, [r3, #0]
+ ldr r5, [r3, #1]
+ subs r2, r9, r6
+ adds r2, r2, r7
+ adds r2, r2, r4
+ subs r2, r2, r5
+ add sp, sp, #64
+ pop {r4-r11, pc}
projects / arm-crypto-lib.git / blobdiff