A CPU Instruction Set Details

BLTZALL rs, offset

Description:

A branch target address is computed from the sum of the address of the instruction in the delay slot and the 16-bit offset, shifted left two bits and sign-extended. Unconditionally, the address of the instruction after the delay slot is placed in the link register, r31. If the contents of general register rs have the sign bit set, then the program branches to the target address, with a delay of one instruction.

General register rs may not be general register 31, because such an instruction is not restartable. An attempt to execute this instruction with register 31 specified as rs is not trapped, however. If the conditional branch is not taken, the instruction in the branch delay slot is nullified.

Operation:

Exceptions:

None

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