31ebde9e5e
Some phones have a buggy NEON unit and the Poly1305 NEON code fails on them, even though other NEON code appears to work fine. This change: 1) Fixes a bug where NEON was assumed even when the code wasn't compiled in NEON mode. 2) Adds a second NEON control bit that can be disabled in order to run NEON code, but not the Poly1305 NEON code. https://code.google.com/p/chromium/issues/detail?id=341598 Change-Id: Icb121bf8dba47c7a46c7667f676ff7a4bc973625 Reviewed-on: https://boringssl-review.googlesource.com/1351 Reviewed-by: Adam Langley <agl@google.com>
98 lines
4.0 KiB
C
98 lines
4.0 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#include <openssl/cpu.h>
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#if defined(OPENSSL_ARM)
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#include <stdio.h>
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#include <inttypes.h>
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#include "arm_arch.h"
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#if defined(__ARM_NEON__)
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uint32_t OPENSSL_armcap_P = ARMV7_NEON | ARMV7_NEON_FUNCTIONAL;
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#else
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uint32_t OPENSSL_armcap_P = ARMV7_NEON_FUNCTIONAL;
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#endif
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char CRYPTO_is_NEON_capable() {
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return (OPENSSL_armcap_P & ARMV7_NEON) != 0;
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}
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void CRYPTO_set_NEON_capable(char neon_capable) {
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if (neon_capable) {
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OPENSSL_armcap_P |= ARMV7_NEON;
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} else {
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OPENSSL_armcap_P &= ~ARMV7_NEON;
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}
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}
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char CRYPTO_is_NEON_functional() {
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static const uint32_t kWantFlags = ARMV7_NEON | ARMV7_NEON_FUNCTIONAL;
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return (OPENSSL_armcap_P & kWantFlags) == kWantFlags;
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}
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void CRYPTO_set_NEON_functional(char neon_functional) {
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if (neon_functional) {
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OPENSSL_armcap_P |= ARMV7_NEON_FUNCTIONAL;
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} else {
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OPENSSL_armcap_P &= ~ARMV7_NEON_FUNCTIONAL;
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}
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}
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#endif /* defined(OPENSSL_ARM) */
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