dest[0] = dest[0] / source[0] dest[1] = dest[1] / source[1] dest[2] = dest[2] / source[2] dest[3] = dest[3] / source[3]
The divps instruction divides the 4 source values (second operand) into the 4 values of the destination (an XMM register). The source can be an XMM register or a 32 bit memory location. There is also vdivps on CPUs with AVX instructions which allows using 3 XMM registers or 2 XMM registers and a memory location which can simplify coding and which divides 8 pairs of values if you use YMM registers.
divps xmm0, xmm1 ; divide 4 pairs of values of xmm0 & xmm1 ; leave the rest of ymm0 as is divps xmm0, [x] ; divide 4 pairs of values of xmm0 & x ; x is an array of floats ; leave the rest of ymm0 as is vdivps xmm3, xmm0, xmm15 ; divide 4 pairs of values of xmm0 & xmm15 ; store results in xmm3 vdivps ymm3, ymm0, [x] ; divide 8 pairs of values of ymm0 & x ; store results in ymm3 vdivps ymm3, ymm0, [rsi] ; divide 8 pairs of values of ymm0 & [rsi] ; rsi contains the address of an array ; store results in ymm3