diff --git a/shacal2.cpp b/shacal2.cpp
index 642db3cc..6770c8a3 100644
--- a/shacal2.cpp
+++ b/shacal2.cpp
@@ -18,73 +18,8 @@
 #include "misc.h"
 #include "cpu.h"
 
-#if CRYPTOPP_BOOL_SSE_SHA_INTRINSICS_AVAILABLE
-#include <immintrin.h>
-#endif
-
-// Clang __m128i casts
-#define M128_CAST(x) ((__m128i *)(void *)(x))
-#define CONST_M128_CAST(x) ((const __m128i *)(const void *)(x))
-
 NAMESPACE_BEGIN(CryptoPP)
 
-ANONYMOUS_NAMESPACE_BEGIN
-
-#if CRYPTOPP_BOOL_SSE_SHA_INTRINSICS_AVAILABLE
-void SHACAL2_Enc_ProcessAndXorBlock_SHANI(const word32* subKeys, const byte *inBlock, const byte *xorBlock, byte *outBlock)
-{
-	CRYPTOPP_ASSERT(subKeys);
-	CRYPTOPP_ASSERT(inBlock);
-	CRYPTOPP_ASSERT(outBlock);
-
-	__m128i MASK = _mm_set_epi64x(0x0C0D0E0F08090A0B, 0x0405060700010203);
-	__m128i B0 = _mm_loadu_si128(CONST_M128_CAST(inBlock + 0));
-	__m128i B1 = _mm_loadu_si128(CONST_M128_CAST(inBlock + 16));
-
-	B0 = _mm_shuffle_epi8(B0, MASK);
-	B1 = _mm_shuffle_epi8(B1, MASK);
-
-	B0 = _mm_shuffle_epi32(B0, 0xB1);  // CDAB
-	B1 = _mm_shuffle_epi32(B1, 0x1B);  // EFGH
-
-	__m128i TMP  = _mm_alignr_epi8(B0, B1, 8);  // ABEF
-	B1 = _mm_blend_epi16(B1, B0, 0xF0);         // CDGH
-	B0 = TMP;
-
-	for (size_t i = 0; i != 8; ++i)
-	{
-		B1 = _mm_sha256rnds2_epu32(B1, B0, _mm_set_epi32(0,0,subKeys[8*i+1],subKeys[8*i+0]));
-		B0 = _mm_sha256rnds2_epu32(B0, B1, _mm_set_epi32(0,0,subKeys[8*i+3],subKeys[8*i+2]));
-		B1 = _mm_sha256rnds2_epu32(B1, B0, _mm_set_epi32(0,0,subKeys[8*i+5],subKeys[8*i+4]));
-		B0 = _mm_sha256rnds2_epu32(B0, B1, _mm_set_epi32(0,0,subKeys[8*i+7],subKeys[8*i+6]));
-	}
-
-	TMP = _mm_shuffle_epi32(B0, 0x1B);    // FEBA
-	B1 = _mm_shuffle_epi32(B1, 0xB1);     // DCHG
-	B0 = _mm_blend_epi16(TMP, B1, 0xF0);  // DCBA
-	B1 = _mm_alignr_epi8(B1, TMP, 8);     // ABEF
-
-	B0 = _mm_shuffle_epi8(B0, MASK);
-	B1 = _mm_shuffle_epi8(B1, MASK);
-
-	if (xorBlock)
-	{
-		_mm_storeu_si128(M128_CAST(outBlock + 0),
-			_mm_xor_si128(B0, _mm_loadu_si128(CONST_M128_CAST(xorBlock + 0))));
-
-		_mm_storeu_si128(M128_CAST(outBlock + 16),
-			_mm_xor_si128(B1, _mm_loadu_si128(CONST_M128_CAST(xorBlock + 16))));
-	}
-	else
-	{
-		_mm_storeu_si128(M128_CAST(outBlock + 0), B0);
-		_mm_storeu_si128(M128_CAST(outBlock + 16), B1);
-	}
-}
-#endif
-
-ANONYMOUS_NAMESPACE_END
-
 // SHACAL-2 function and round definitions
 
 #define S0(x) (rotrFixed(x,2)^rotrFixed(x,13)^rotrFixed(x,22))