|Opcode/Instruction||Op/En||64/32 bit Mode Support||CPUID Feature Flag||Description|
|NP 0F 38 C8 /r SHA1NEXTE xmm1, xmm2/m128||RM||V/V||SHA||Calculates SHA1 state variable E after four rounds of operation from the current SHA1 state variable A in xmm1. The calculated value of the SHA1 state variable E is added to the scheduled dwords in xmm2/m128, and stored with some of the scheduled dwords in xmm1.|
|Op/En||Operand 1||Operand 2||Operand 3|
|RM||ModRM:reg (r, w)||ModRM:r/m (r)||NA|
The SHA1NEXTE calculates the SHA1 state variable E after four rounds of operation from the current SHA1 state variable A in the destination operand. The calculated value of the SHA1 state variable E is added to the source operand, which contains the scheduled dwords.
TMP := (SRC1[127:96] ROL 30);
DEST[127:96] := SRC2[127:96] + TMP;
DEST[95:64] := SRC2[95:64];
DEST[63:32] := SRC2[63:32];
DEST[31:0] := SRC2[31:0];
Intel C/C++ Compiler Intrinsic Equivalent
SHA1NEXTE: __m128i _mm_sha1nexte_epu32(__m128i, __m128i);
SIMD Floating-Point Exceptions
See Table 2-21, “Type 4 Class Exception Conditions”.