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Thu, 8 Jul 2021 14:46:07 +0000 (GMT) From: Stefan Berger To: slof@lists.ozlabs.org Date: Thu, 8 Jul 2021 10:45:57 -0400 Message-Id: <20210708144601.437435-3-stefanb@linux.vnet.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210708144601.437435-1-stefanb@linux.vnet.ibm.com> References: <20210708144601.437435-1-stefanb@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: qJdQYEqTuuiuM5HGK_DZyHxCWg9bBOw5 X-Proofpoint-ORIG-GUID: qJdQYEqTuuiuM5HGK_DZyHxCWg9bBOw5 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-07-08_06:2021-07-08, 2021-07-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 clxscore=1011 phishscore=0 suspectscore=0 spamscore=0 malwarescore=0 priorityscore=1501 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2107080078 Subject: [SLOF] [PATCH v2 2/6] tcgbios: Use assembly for 32 bit rotr in sha256 X-BeenThere: slof@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Patches for https://github.com/aik/SLOF" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stefan Berger Errors-To: slof-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "SLOF" From: Stefan Berger Use assembly for the 32 bit rotr in the sha256 implementation. Signed-off-by: Stefan Berger --- lib/libtpm/sha256.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/lib/libtpm/sha256.c b/lib/libtpm/sha256.c index fb67e19..292e54e 100644 --- a/lib/libtpm/sha256.c +++ b/lib/libtpm/sha256.c @@ -22,10 +22,16 @@ typedef struct _sha256_ctx { uint32_t h[8]; } sha256_ctx; -static inline uint32_t rotr(uint32_t x, uint8_t n) -{ - return (x >> n) | (x << (32 - n)); -} +#define rotr(VAL, N) \ +({ \ + uint32_t res; \ + __asm__ ( \ + "rotrwi %0, %1, %2\n\t" \ + : "=r" (res) \ + : "r" (VAL), "i" (N) \ + ); \ + res; \ +}) static inline uint32_t Ch(uint32_t x, uint32_t y, uint32_t z) {