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#define rAX 0
#define rCX 1
#define rDX 2
#define rBX 3
#define rSP 4
#define rBP 5
#define rSI 6
#define rDI 7
#define rX0 0
#define rX1 1
#define rX2 2
#define rX3 3
#define rX4 4
#define rX5 5
#define rX6 6
#define OP(o, m, ro, rm) WORD $0x0F66; /* op + modr/m byte */ \
BYTE $(o); \
BYTE $(((m)<<6)|((ro)<<3)|(rm))
#define OPi(o, m, ro, rm, i) OP((o), (m), (ro), (rm)); \
BYTE $(i)
#define OP4(o, m, ro, rm) WORD $0x0F66; \
WORD $(o); \
BYTE $(((m)<<6)|((ro)<<3)|(rm))
#define OP4i(o, m, ro, rm, i) OP4((o), (m), (ro), (rm)); \
BYTE $(i)
/* MOVLPD */
//opcode = 660F12
//modrm = 01 000 000 [AX → X0] / 01 001 000 [AX → X1]
//disp8 = 8 / 32
#define MOVLPD(off, s, d) OPi(0x12, 0x1, (d), (s), (off))
/* MOVHPD */
//opcode = 660F16
//modrm = 01 000 000 [AX → X0] / 01 001 000 [AX → X1]
//disp8 = 16 / 40
#define MOVHPD(off, s, d) OPi(0x16, 0x1, (d), (s), (off))
/* HSUBPD */
//opcode = 660F7D = 01100110 00001111 01111101
//modrm = 11 000 000 [X0 → X0]
#define HSUBPD(s, d) OP(0x7D, 0x3, (d), (s))
/* DPPD */
//opcode = 660F3A41 = 01100110 00001111 00111010 01000001
//modrm = 11 000 001 [X1 → X0]
//imm8 = 0011 0001
#define DPPD(s, d) OP4i(0x413A, 0x3, (d), (s), 0x31)
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