STANDARD_MODRM
STANDARD_MODRM(x, mode, reg, r_m, rex_prefix, wbit, 0);
STANDARD_MODRM(x, mode, reg, r_m, rex_prefix, wbit, 1);
STANDARD_MODRM(x, mode, reg, r_m, rex_prefix, wbit, 1);
STANDARD_MODRM(x, mode, reg, r_m, rex_prefix, wbit, 1);
STANDARD_MODRM(x, mode, reg, r_m, rex_prefix, wbit, 0);
STANDARD_MODRM(x, mode, reg, r_m, rex_prefix, wbit, 1);
STANDARD_MODRM(x, mode, reg, r_m, rex_prefix, wbit, 0);