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Windows Driver: correctly save and restore extended processor state when performing AVX operations on Windows 7 and later. Enhance readability of code handling save/restore of floating point state.

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This commit is contained in:
Mounir IDRASSI
2017-07-04 02:05:11 +02:00
parent c2f6190627
commit 89efcdb8cd
8 changed files with 201 additions and 39 deletions
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8
src/Common/Tests.c
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@@ -583,8 +583,8 @@ BOOL RunHashTest (HashFunction fn, HashTestVector* vector, BOOL bUseSSE)
BOOL bRet = TRUE;
#if defined (DEVICE_DRIVER) && !defined (_WIN64)
KFLOATING_SAVE floatingPointState;
NTSTATUS saveStatus = STATUS_SUCCESS;
if (bUseSSE && (HasISSE() || HasSSE2()))
NTSTATUS saveStatus = STATUS_INVALID_PARAMETER;
if (bUseSSE)
saveStatus = KeSaveFloatingPointState (&floatingPointState);
#endif
while (vector[i].hexInput && vector[i].hexOutput)
@@ -601,7 +601,7 @@ BOOL RunHashTest (HashFunction fn, HashTestVector* vector, BOOL bUseSSE)
}
#if defined (DEVICE_DRIVER) && !defined (_WIN64)
if (NT_SUCCESS (saveStatus) && bUseSSE && (HasISSE() || HasSSE2()))
if (NT_SUCCESS (saveStatus))
KeRestoreFloatingPointState (&floatingPointState);
#endif
@@ -1508,7 +1508,7 @@ BOOL test_pkcs5 ()
return FALSE;
/* STREEBOG hash tests */
if (RunHashTest (StreebogHash, Streebog512TestVectors, TRUE) == FALSE)
if (RunHashTest (StreebogHash, Streebog512TestVectors, (HasSSE2() || HasSSE41())? TRUE : FALSE) == FALSE)
return FALSE;
/* PKCS-5 test 1 with HMAC-SHA-256 used as the PRF (https://tools.ietf.org/html/draft-josefsson-scrypt-kdf-00) */