The Tor Browser: media/libopus/celt/arm/kiss_fft

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /*Copyright (c) 2013, Xiph.Org Foundation and contributors.

     3   All rights reserved.

     5   Redistribution and use in source and binary forms, with or without

     6    modification, are permitted provided that the following conditions are met:

     8     * Redistributions of source code must retain the above copyright notice,

     9        this list of conditions and the following disclaimer.

    10     * Redistributions in binary form must reproduce the above copyright notice,

    11        this list of conditions and the following disclaimer in the

    12        documentation and/or other materials provided with the distribution.

    14   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    15   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    16   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    17   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

    18   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    19   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    20   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    21   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    22   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    23   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    24   POSSIBILITY OF SUCH DAMAGE.*/

    26 #ifndef KISS_FFT_ARMv4_H

    27 #define KISS_FFT_ARMv4_H

    29 #if !defined(KISS_FFT_GUTS_H)

    30 #error "This file should only be included from _kiss_fft_guts.h"

    31 #endif

    33 #ifdef FIXED_POINT

    35 #undef C_MUL

    36 #define C_MUL(m,a,b) \

    37     do{ \

    38        int br__; \

    39        int bi__; \

    40        int tt__; \

    41         __asm__ __volatile__( \

    42             "#C_MUL\n\t" \

    43             "ldrsh %[br], [%[bp], #0]\n\t" \

    44             "ldm %[ap], {r0,r1}\n\t" \

    45             "ldrsh %[bi], [%[bp], #2]\n\t" \

    46             "smull %[tt], %[mi], r1, %[br]\n\t" \

    47             "smlal %[tt], %[mi], r0, %[bi]\n\t" \

    48             "rsb %[bi], %[bi], #0\n\t" \

    49             "smull %[br], %[mr], r0, %[br]\n\t" \

    50             "mov %[tt], %[tt], lsr #15\n\t" \

    51             "smlal %[br], %[mr], r1, %[bi]\n\t" \

    52             "orr %[mi], %[tt], %[mi], lsl #17\n\t" \

    53             "mov %[br], %[br], lsr #15\n\t" \

    54             "orr %[mr], %[br], %[mr], lsl #17\n\t" \

    55             : [mr]"=r"((m).r), [mi]"=r"((m).i), \

    56               [br]"=&r"(br__), [bi]"=r"(bi__), [tt]"=r"(tt__) \

    57             : [ap]"r"(&(a)), [bp]"r"(&(b)) \

    58             : "r0", "r1" \

    59         ); \

    60     } \

    61     while(0)

    63 #undef C_MUL4

    64 #define C_MUL4(m,a,b) \

    65     do{ \

    66        int br__; \

    67        int bi__; \

    68        int tt__; \

    69         __asm__ __volatile__( \

    70             "#C_MUL4\n\t" \

    71             "ldrsh %[br], [%[bp], #0]\n\t" \

    72             "ldm %[ap], {r0,r1}\n\t" \

    73             "ldrsh %[bi], [%[bp], #2]\n\t" \

    74             "smull %[tt], %[mi], r1, %[br]\n\t" \

    75             "smlal %[tt], %[mi], r0, %[bi]\n\t" \

    76             "rsb %[bi], %[bi], #0\n\t" \

    77             "smull %[br], %[mr], r0, %[br]\n\t" \

    78             "mov %[tt], %[tt], lsr #17\n\t" \

    79             "smlal %[br], %[mr], r1, %[bi]\n\t" \

    80             "orr %[mi], %[tt], %[mi], lsl #15\n\t" \

    81             "mov %[br], %[br], lsr #17\n\t" \

    82             "orr %[mr], %[br], %[mr], lsl #15\n\t" \

    83             : [mr]"=r"((m).r), [mi]"=r"((m).i), \

    84               [br]"=&r"(br__), [bi]"=r"(bi__), [tt]"=r"(tt__) \

    85             : [ap]"r"(&(a)), [bp]"r"(&(b)) \

    86             : "r0", "r1" \

    87         ); \

    88     } \

    89     while(0)

    91 #undef C_MULC

    92 #define C_MULC(m,a,b) \

    93     do{ \

    94        int br__; \

    95        int bi__; \

    96        int tt__; \

    97         __asm__ __volatile__( \

    98             "#C_MULC\n\t" \

    99             "ldrsh %[br], [%[bp], #0]\n\t" \

   100             "ldm %[ap], {r0,r1}\n\t" \

   101             "ldrsh %[bi], [%[bp], #2]\n\t" \

   102             "smull %[tt], %[mr], r0, %[br]\n\t" \

   103             "smlal %[tt], %[mr], r1, %[bi]\n\t" \

   104             "rsb %[bi], %[bi], #0\n\t" \

   105             "smull %[br], %[mi], r1, %[br]\n\t" \

   106             "mov %[tt], %[tt], lsr #15\n\t" \

   107             "smlal %[br], %[mi], r0, %[bi]\n\t" \

   108             "orr %[mr], %[tt], %[mr], lsl #17\n\t" \

   109             "mov %[br], %[br], lsr #15\n\t" \

   110             "orr %[mi], %[br], %[mi], lsl #17\n\t" \

   111             : [mr]"=r"((m).r), [mi]"=r"((m).i), \

   112               [br]"=&r"(br__), [bi]"=r"(bi__), [tt]"=r"(tt__) \

   113             : [ap]"r"(&(a)), [bp]"r"(&(b)) \

   114             : "r0", "r1" \

   115         ); \

   116     } \

   117     while(0)

   119 #endif /* FIXED_POINT */

   121 #endif /* KISS_FFT_ARMv4_H */

The Tor Browser / file revision

media/libopus/celt/arm/kiss_fft_armv4.h@ac0c01689b40

media/libopus/celt/arm/kiss_fft_armv4.h