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8294073: Performance improvement for message digest implementations

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Reviewed-by: jjiang
This commit is contained in:
Xue-Lei Andrew Fan 2022-11-21 15:56:19 +00:00
parent 57f5cfdeb5
commit b366d17a94
1 changed files with 4 additions and 2 deletions
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6
src/java.base/share/classes/sun/security/provider/SHA2.java
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@ -195,10 +195,12 @@ abstract class SHA2 extends DigestBase {
Integer.rotateRight(e, 25);
// ch(x,y,z) = (x and y) xor ((complement x) and z)
int ch_efg = (e & f) ^ ((~e) & g);
// = z xor (x and (y xor z));
int ch_efg = g ^ (e & (f ^ g));
// maj(x,y,z) = (x and y) xor (x and z) xor (y and z)
int maj_abc = (a & b) ^ (a & c) ^ (b & c);
// = (x and y) xor ((x xor y) and z)
int maj_abc = (a & b) ^ ((a ^ b) & c);
int T1 = h + sigma1_e + ch_efg + ROUND_CONSTS[i] + W[i];
int T2 = sigma0_a + maj_abc;