From a7ec8c47e21c76624149beb1c9490c0e1bedf2a8 Mon Sep 17 00:00:00 2001 From: KireinaHoro Date: Wed, 11 Oct 2017 13:16:46 +0800 Subject: [PATCH] SPARC optimizations for Encode() Normally a SPARC processor runs in big endian mode. Save the extra labor needed for little endian machines when the target is a big endian one (sparc). Signed-off-by: Pengcheng Xu --- module/icp/algs/sha1/sha1.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/module/icp/algs/sha1/sha1.c b/module/icp/algs/sha1/sha1.c index 5a4a7da92..7f28b3796 100644 --- a/module/icp/algs/sha1/sha1.c +++ b/module/icp/algs/sha1/sha1.c @@ -817,10 +817,22 @@ Encode(uint8_t *_RESTRICT_KYWD output, const uint32_t *_RESTRICT_KYWD input, { size_t i, j; - for (i = 0, j = 0; j < len; i++, j += 4) { - output[j] = (input[i] >> 24) & 0xff; - output[j + 1] = (input[i] >> 16) & 0xff; - output[j + 2] = (input[i] >> 8) & 0xff; - output[j + 3] = input[i] & 0xff; +#if defined(__sparc) + if (IS_P2ALIGNED(output, sizeof (uint32_t))) { + for (i = 0, j = 0; j < len; i++, j += 4) { + /* LINTED E_BAD_PTR_CAST_ALIGN */ + *((uint32_t *)(output + j)) = input[i]; + } + } else { +#endif /* little endian -- will work on big endian, but slowly */ + + for (i = 0, j = 0; j < len; i++, j += 4) { + output[j] = (input[i] >> 24) & 0xff; + output[j + 1] = (input[i] >> 16) & 0xff; + output[j + 2] = (input[i] >> 8) & 0xff; + output[j + 3] = input[i] & 0xff; + } +#if defined(__sparc) } +#endif } -- 2.40.0