These instructions are found specifically on PlayStation Portable and they are backported to its processor from the mips32r2 specs.
SEH is a single instruction that replaces the combo sll DST_REG, SRC_REG, 0x10 and sra DST_REG, DST_REG, 0x10 to perform a s16 cast. Same concept for SEB but when a cast to s8 is required.
These instructions are found specifically on PlayStation Portable and they are backported to its processor from the mips32r2 specs.
SEHis a single instruction that replaces the combosll DST_REG, SRC_REG, 0x10andsra DST_REG, DST_REG, 0x10to perform as16cast. Same concept forSEBbut when a cast tos8is required.