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Salsa20 SSE Windows build fix -- turns out you can't be as loose with SSE intrinsics in Visual Studio

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This commit is contained in:
Adam Ierymenko 2014-07-26 20:07:38 -07:00
parent 9809511c4c
commit f2d372545a
3 changed files with 24 additions and 20 deletions
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28
node/Salsa20.cpp
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@ -144,10 +144,14 @@ void Salsa20::encrypt(const void *in,void *out,unsigned int bytes)
}
#ifdef ZT_SALSA20_SSE
__m128i X0 = _state.v[0];
__m128i X1 = _state.v[1];
__m128i X2 = _state.v[2];
__m128i X3 = _state.v[3];
__m128i X0 = _mm_load_si128((const __m128i *)&(_state.v[0]));
__m128i X1 = _mm_load_si128((const __m128i *)&(_state.v[1]));
__m128i X2 = _mm_load_si128((const __m128i *)&(_state.v[2]));
__m128i X3 = _mm_load_si128((const __m128i *)&(_state.v[3]));
__m128i X0s = X0;
__m128i X1s = X1;
__m128i X2s = X2;
__m128i X3s = X3;
for (i=0;i<_roundsDiv2;++i) {
__m128i T = _mm_add_epi32(X0, X3);
@ -185,10 +189,10 @@ void Salsa20::encrypt(const void *in,void *out,unsigned int bytes)
X3 = _mm_shuffle_epi32(X3, 0x93);
}
X0 = _mm_add_epi32(_state.v[0],X0);
X1 = _mm_add_epi32(_state.v[1],X1);
X2 = _mm_add_epi32(_state.v[2],X2);
X3 = _mm_add_epi32(_state.v[3],X3);
X0 = _mm_add_epi32(X0s,X0);
X1 = _mm_add_epi32(X1s,X1);
X2 = _mm_add_epi32(X2s,X2);
X3 = _mm_add_epi32(X3s,X3);
{
__m128i k02 = _mm_or_si128(_mm_slli_epi64(X0, 32), _mm_srli_epi64(X3, 32));
@ -201,10 +205,10 @@ void Salsa20::encrypt(const void *in,void *out,unsigned int bytes)
const float *const mv = (const float *)m;
float *const cv = (float *)c;
_mm_storeu_ps(cv,_mm_xor_si128(_mm_unpackhi_epi64(k02,k20),_mm_loadu_ps(mv)));
_mm_storeu_ps(cv + 4,_mm_xor_si128(_mm_unpackhi_epi64(k13,k31),_mm_loadu_ps(mv + 4)));
_mm_storeu_ps(cv + 8,_mm_xor_si128(_mm_unpacklo_epi64(k20,k02),_mm_loadu_ps(mv + 8)));
_mm_storeu_ps(cv + 12,_mm_xor_si128(_mm_unpacklo_epi64(k31,k13),_mm_loadu_ps(mv + 12)));
_mm_storeu_ps(cv,_mm_castsi128_ps(_mm_xor_si128(_mm_unpackhi_epi64(k02,k20),_mm_castps_si128(_mm_loadu_ps(mv)))));
_mm_storeu_ps(cv + 4,_mm_castsi128_ps(_mm_xor_si128(_mm_unpackhi_epi64(k13,k31),_mm_castps_si128(_mm_loadu_ps(mv + 4)))));
_mm_storeu_ps(cv + 8,_mm_castsi128_ps(_mm_xor_si128(_mm_unpacklo_epi64(k20,k02),_mm_castps_si128(_mm_loadu_ps(mv + 8)))));
_mm_storeu_ps(cv + 12,_mm_castsi128_ps(_mm_xor_si128(_mm_unpacklo_epi64(k31,k13),_mm_castps_si128(_mm_loadu_ps(mv + 12)))));
}
if (!(++_state.i[8])) {