Intel 253666-024US - Manual (Page 496)

3-450 Vol. 2A HSUBPS—Packed Single-FP Horizontal Subtract
INSTRUCTION SET REFERENCE, A-M
In 64-bit mode, use of the REX.R prefix permits this instruction to access additional
registers (XMM8-XMM15).
Operation
xmm1[31:0] = xmm1[31:0] − xmm1[63:32];
xmm1[63:32] = xmm1[95:64] − xmm1[127:96];
xmm1[95:64] = xmm2/m128[31:0] − xmm2/m128[63:32];
xmm1[127:96] = xmm2/m128[95:64] − xmm2/m128[127:96];
Intel C/C++ Compiler Intrinsic Equivalent
HSUBPS __m128 _mm_hsub_ps(__m128 a, __m128 b)
Exceptions
When the source operand is a memory operand, the operand must be aligned on a
16-byte boundary or a general-protection exception (#GP) will be generated.
Figure 3-13. HSUBPS—Packed Single-FP Horizontal Subtract
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