nmsub            1457 arch/mips/math-emu/cp1emu.c DEF3OP(nmsub, sp, ieee754sp_mul, ieee754sp_sub, ieee754sp_neg);
nmsub            1461 arch/mips/math-emu/cp1emu.c DEF3OP(nmsub, dp, ieee754dp_mul, ieee754dp_sub, ieee754dp_neg);