From: bg Date: Fri, 9 Apr 2010 23:23:20 +0000 (+0000) Subject: further reduction of BMW tiny size (1888 bytes) X-Git-Url: https://git.cryptolib.org/?a=commitdiff_plain;h=7bc75db2cff11a8a8b347e27dec3f4e019418d52;p=avr-crypto-lib.git further reduction of BMW tiny size (1888 bytes) --- diff --git a/bmw/bmw_small-tinyasm.S b/bmw/bmw_small-tinyasm.S index ddad3c9..de7ff5a 100644 --- a/bmw/bmw_small-tinyasm.S +++ b/bmw/bmw_small-tinyasm.S @@ -189,31 +189,6 @@ h1 = 5 m0 = 6 m1 = 7 -add_hx_to_w: - movw r26, h0 - add r26, r16 - adc r27, r1 - rcall load32_from_Y - sbiw r28, 4 - lsl r20 - rol r21 - brcs 30f - /* addition */ - rcall add_X_to_32 - rjmp store32_to_Y;50f -30: /* substract */ - ld r0, X+ - sub r22, r0 - ld r0, X+ - sbc r23, r0 - ld r0, X+ - sbc r24, r0 - ld r0, X+ - sbc r25, r0 -50: - rjmp store32_to_Y -; rcall store32_to_Y -; ret /******************************************************************************/ load32_from_X: @@ -269,112 +244,6 @@ f0_s_table: .byte 0,1,2,3,4 ; .byte 0 -f0: - movw h0, r26 - movw q0, r28 - movw m0, r30 -;--- DBG -; push_range 22, 25 -; movw r24, r26 -; ldi r22, 'H' -; rcall printX -; pop_range 22, 25 -;--- END DBG -;--- DBG -; push_range 22, 25 -; movw r24, r30 -; ldi r22, 'M' -; rcall printX -; pop_range 22, 25 -;--- END DBG - /* xor m into h */ -; ldi r20, 64 - rcall memxor_short - movw r30, m0 - movw r26, h0 - - /* set q to zero */ - ldi r22, 64 -10: st Y+, r1 - dec r22 - brne 10b - movw r28, q0 - /* calculate W and store it in Q */ - ldi r19, 5 -30: - ldi r18, 16 - /* load initial index */ - ldi r30, lo8(f0_indextable-1) - ldi r31, hi8(f0_indextable-1) - add r30, r19 - adc r31, r1 - lpm r16, Z - /* load values from hacktable */ - ldi r30, lo8(f0_hacktable-2) - ldi r31, hi8(f0_hacktable-2) - lsl r19 - add r30, r19 - adc r31, r1 - lsr r19 - lpm r21, Z+ - lpm r20, Z -40: - call add_hx_to_w - subi r16, -4 - andi r16, 0x0f<<2 - dec r18 - brne 40b - movw r28, q0 - dec r19 - brne 30b - movw r26, h0 -;--- DBG -; push_range 22, 25 -; movw r24, r28 -; ldi r22, 'W' -; rcall printX -; pop_range 22, 25 -;--- END DBG - /* xor m into h */ -; ldi r20, 64 - movw r26, h0 - movw r30, m0 - rcall memxor_short - sbiw r26, 60 -;--- - ldi r30, lo8(f0_s_table) - ldi r31, hi8(f0_s_table) - ldi r21, 15 - mov r8, r21 -50: - rcall load32_from_Y - sbiw r28, 4 - lpm r20, Z+ - movw r2, r30 - rcall sn - movw r30, r2 - - rcall add_X_to_32 - rcall store32_to_Y - - dec r8 - brne 50b -;--- - rcall load32_from_Y - clr r20 - rcall sn - movw r30, r2 - movw r26, h0 - rcall add_X_to_32 - sbiw r26, 4 - st -Y, r25 - st -Y, r24 - st -Y, r23 - st -Y, r22 - sbiw r28, 15*4 - movw r20, h0 - movw r22, m0 - ret /******************************************************************************/ @@ -538,13 +407,8 @@ expand1: inc r19 cpi r19, 17 brne 10b -expand1_exit: -; adiw r26, 63 - st X+, acc0 - st X+, acc1 - st X+, acc2 - st X+, acc3 - ret + rjmp expand2_exit + /******************************************************************************/ /* @@ -570,16 +434,20 @@ expand2: rcall add32_to_acc dec r19 brne 10b - rcall load32_from_X ldi r20, 4 + rcall load32_from_X rcall sn rcall add32_to_acc - rcall load32_from_X ldi r20, 5 + rcall load32_from_X rcall sn rcall add32_to_acc - - rjmp expand1_exit +expand2_exit: + st X+, acc0 + st X+, acc1 + st X+, acc2 + st X+, acc3 + ret /******************************************************************************/ /* @@ -593,13 +461,193 @@ expand2: param h: r20:r21 param j: r24 */ + +/******************************************************************************/ +/* + param q: r24:r25 + param m: r22:r23 + param h: r20:r21 +*/ +f2_1_shift_table: + .byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + .byte 0x2B, 0x64, 0x66, 0x03, 0x51, 0x55, 0x87, 0x55 +f2_2_shift_table: + .byte (2<<1), (7<<1), (4<<1), (3<<1), (4<<1)+1, (6<<1)+1, (6<<1) + .byte 0 ; just for alignment + +/******************************************************************************/ +/* + param ctx: r24:r25 + param msg: r22:r23 +*/ +/* f0 + param q: r28:r29 (Y) + param h: r26:r27 (X) + param m: r30:r31 (Z) +*/ +/* f1 + param q: r24:r25 + param m: r22:r23 + param h: r20:r21 +*/ +/* f2 + param q: r24:r25 + param m: r22:r23 + param h: r20:r21 +*/ +q0 = 2 +q1 = 3 +h0 = 4 +h1 = 5 +m0 = 6 +m1 = 7 + + +.global bmw_small_nextBlock +.global bmw224_nextBlock +.global bmw256_nextBlock +bmw_small_nextBlock: +bmw224_nextBlock: +bmw256_nextBlock: + push_range 28, 29 + push_range 2, 17 + stack_alloc_large 32*4, r28, r29 + adiw r28, 1 +; push_range 28, 29 /* push Q */ +; push_range 22, 25 /* push M & H */ + /* increment counter */ + movw r26, r24 + movw r2, r26 + adiw r26, 63 + adiw r26, 1 + rcall load_acc_from_X + ldi r19, 1 + add acc0, r19 + adc acc1, r1 + adc acc2, r1 + adc acc3, r1 + st -X, acc3 + st -X, acc2 + st -X, acc1 + st -X, acc0 + /* call f0 */ + movw r30, r22 + movw r26, r24 +f0: + movw h0, r26 + movw q0, r28 + movw m0, r30 + /* xor m into h */ +; ldi r20, 64 + rcall memxor_short + movw r30, m0 + movw r26, h0 + + /* set q to zero */ + ldi r22, 64 +10: st Y+, r1 + dec r22 + brne 10b + movw r28, q0 + /* calculate W and store it in Q */ + ldi r19, 5 +30: + ldi r18, 16 + /* load initial index */ + ldi r30, lo8(f0_indextable-1) + ldi r31, hi8(f0_indextable-1) + add r30, r19 + adc r31, r1 + lpm r16, Z + /* load values from hacktable */ + ldi r30, lo8(f0_hacktable-2) + ldi r31, hi8(f0_hacktable-2) + lsl r19 + add r30, r19 + adc r31, r1 + lsr r19 + lpm r21, Z+ + lpm r20, Z +40: + ;call add_hx_to_w +add_hx_to_w: + movw r26, h0 + add r26, r16 + adc r27, r1 + rcall load32_from_Y + sbiw r28, 4 + lsl r20 + rol r21 + brcs 300f + /* addition */ + rcall add_X_to_32 + rjmp 500f +300: /* substract */ + ld r0, X+ + sub r22, r0 + ld r0, X+ + sbc r23, r0 + ld r0, X+ + sbc r24, r0 + ld r0, X+ + sbc r25, r0 +500: + rcall store32_to_Y + subi r16, -4 + andi r16, 0x0f<<2 + dec r18 + brne 40b + movw r28, q0 + dec r19 + brne 30b + movw r26, h0 + /* xor m into h */ +; ldi r20, 64 + movw r26, h0 + movw r30, m0 + rcall memxor_short + sbiw r26, 60 +;--- + ldi r30, lo8(f0_s_table) + ldi r31, hi8(f0_s_table) + ldi r21, 15 + mov r8, r21 +50: + rcall load32_from_Y + sbiw r28, 4 + lpm r20, Z+ + movw r2, r30 + rcall sn + movw r30, r2 + + rcall add_X_to_32 + rcall store32_to_Y + + dec r8 + brne 50b +;--- + rcall load32_from_Y + clr r20 + rcall sn + movw r30, r2 + movw r26, h0 + rcall add_X_to_32 + sbiw r26, 4 + st -Y, r25 + st -Y, r24 + st -Y, r23 + st -Y, r22 + sbiw r28, 15*4 + movw r20, h0 + movw r22, m0 + + /* call f1*/ + movw r24, r28 f1: movw r2, r24 movw r4, r22 movw r6, r20 movw r26, r2 -; movw r22, r4 -; movw r20, r6 clr r24 rcall expand1 movw r26, r2 @@ -619,20 +667,14 @@ f1: movw r24, r2 movw r22, r4 movw r20, r6 - ret -/******************************************************************************/ -/* - param q: r24:r25 - param m: r22:r23 - param h: r20:r21 -*/ -f2_1_shift_table: - .byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 - .byte 0x2B, 0x64, 0x66, 0x03, 0x51, 0x55, 0x87, 0x55 -f2_2_shift_table: - .byte (2<<1), (7<<1), (4<<1), (3<<1), (4<<1)+1, (6<<1)+1, (6<<1) - .byte 0 ; just for alignment + + /* call f2 */ +; pop_range 20, 25 +; push_range 20, 25 +; rcall printQ +; push r20 +; push r21 acc2 = 8 acc3 = 9 acc0 = 14 @@ -800,77 +842,11 @@ f2: rcall add_acc_to_Z inc r18 cpi r17, 5 - breq 20f - dec r17 + brne 20f + sbiw r26, 8*4 +20: dec r17 brne 10b - ret -20: sbiw r26, 8*4 - dec r17 - rjmp 10b - -/******************************************************************************/ -/* - param ctx: r24:r25 - param msg: r22:r23 -*/ -/* f0 - param q: r28:r29 (Y) - param h: r26:r27 (X) - param m: r30:r31 (Z) -*/ -/* f1 - param q: r24:r25 - param m: r22:r23 - param h: r20:r21 -*/ -/* f2 - param q: r24:r25 - param m: r22:r23 - param h: r20:r21 -*/ -.global bmw_small_nextBlock -.global bmw224_nextBlock -.global bmw256_nextBlock -bmw_small_nextBlock: -bmw224_nextBlock: -bmw256_nextBlock: - push_range 28, 29 - push_range 2, 17 - stack_alloc_large 32*4, r28, r29 - adiw r28, 1 -; push_range 28, 29 /* push Q */ -; push_range 22, 25 /* push M & H */ - /* increment counter */ - movw r26, r24 - movw r2, r26 - adiw r26, 63 - adiw r26, 1 - rcall load_acc_from_X - ldi r19, 1 - add acc0, r19 - adc acc1, r1 - adc acc2, r1 - adc acc3, r1 - st -X, acc3 - st -X, acc2 - st -X, acc1 - st -X, acc0 - /* call f0 */ - movw r30, r22 - movw r26, r24 - rcall f0 - /* call f1*/ - movw r24, r28 -; rcall printQ - rcall f1 - /* call f2 */ -; pop_range 20, 25 -; push_range 20, 25 -; rcall printQ -; push r20 -; push r21 - call f2 ;--- DBG ; pop r25 ; pop r24