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OPENSSL_ia32cap.pod update.
author
Andy Polyakov
<appro@openssl.org>
Sun, 15 Nov 2009 17:34:24 +0000
(17:34 +0000)
committer
Andy Polyakov
<appro@openssl.org>
Sun, 15 Nov 2009 17:34:24 +0000
(17:34 +0000)
doc/crypto/OPENSSL_ia32cap.pod
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diff --git
a/doc/crypto/OPENSSL_ia32cap.pod
b/doc/crypto/OPENSSL_ia32cap.pod
index
b7d8a76
..
dca2e20
100644
(file)
--- a/
doc/crypto/OPENSSL_ia32cap.pod
+++ b/
doc/crypto/OPENSSL_ia32cap.pod
@@
-21,14
+21,16
@@
manipulated afterwards to modify crypto library behaviour. For the
moment of this writing seven bits are significant, namely:
1. bit #4 denoting presence of Time-Stamp Counter.
moment of this writing seven bits are significant, namely:
1. bit #4 denoting presence of Time-Stamp Counter.
-2. bit #20, reserved by Intel, is used to choose
between
RC4 code
+2. bit #20, reserved by Intel, is used to choose
among
RC4 code
paths;
3. bit #23 denoting MMX support;
4. bit #25 denoting SSE support;
5. bit #26 denoting SSE2 support;
6. bit #28 denoting Hyperthreading, which is used to distiguish
cores with shared cache;
paths;
3. bit #23 denoting MMX support;
4. bit #25 denoting SSE support;
5. bit #26 denoting SSE2 support;
6. bit #28 denoting Hyperthreading, which is used to distiguish
cores with shared cache;
-7. bit #57 denoting Intel AES instruction set extension;
+7. bit #30, reserved by Intel, is used to choose among RC4 code
+ paths;
+8. bit #57 denoting Intel AES instruction set extension;
For example, clearing bit #26 at run-time disables high-performance
SSE2 code present in the crypto library. You might have to do this if
For example, clearing bit #26 at run-time disables high-performance
SSE2 code present in the crypto library. You might have to do this if