Intel's IA-32 manual lists 8 aliases for CMPSD
(compare scalar double-precision floating-point values)
and CMPSS (compare scalar single-precision floating-point values)
that improve readability and grep-ability by replacing the
third parameter(comparison predicate) with a pseudo-ops.

CMPEQSD xmm1, xmm2        ->        CMPSD xmm1, xmm2, 0 CMPLTSD xmm1, xmm2        ->        CMPSD xmm1, xmm2, 1 CMPLESD xmm1, xmm2        ->        CMPSD xmm1, xmm2, 2 CMPUNORDSD xmm1, xmm2     ->        CMPSD xmm1, xmm2, 3 CMPNEQSD xmm1, xmm2       ->        CMPSD xmm1, xmm2, 4 CMPNLTSD xmm1, xmm2       ->        CMPSD xmm1, xmm2, 5 CMPNLESD xmm1, xmm2       ->        CMPSD xmm1, xmm2, 6 CMPORDSD xmm1, xmm2       ->        CMPSD xmm1, xmm2, 7

CMPEQSS xmm1, xmm2        ->        CMPSS xmm1, xmm2, 0 CMPLTSS xmm1, xmm2        ->        CMPSS xmm1, xmm2, 1 CMPLESS xmm1, xmm2        ->        CMPSS xmm1, xmm2, 2 CMPUNORDSS xmm1, xmm2     ->        CMPSS xmm1, xmm2, 3 CMPNEQSS xmm1, xmm2       ->        CMPSS xmm1, xmm2, 4 CMPNLTSS xmm1, xmm2       ->        CMPSS xmm1, xmm2, 5 CMPNLESS xmm1, xmm2       ->        CMPSS xmm1, xmm2, 6 CMPORDSS xmm1, xmm2       ->        CMPSS xmm1, xmm2, 7

source:
IA-32 Intel Architecture Software Developer¡¯s Manual
3-136 Vol. 2A (25366616.pdf)

Adding those opcodes to D's inline assembler might be helpfull.

Thomas