MIPS_GCTL0_GM_SHIFT
#define MIPS_GCTL0_GM (_ULCAST_(1) << MIPS_GCTL0_GM_SHIFT)
uasm_i_ins(&p, GPR_K0, GPR_V1, MIPS_GCTL0_GM_SHIFT, 1);
uasm_i_ins(&p, GPR_K0, GPR_ZERO, MIPS_GCTL0_GM_SHIFT, 1);