Srl Rdest, Rsrc1, Src2 Shift Right Logical Srav Rdest, Rsrc1, Rsrc2 Shift Right Arithmetic Variable Sra Rdest, Rsrc1, Src2 Shift Right Arithmetic Sllv Rdest, Rsrc1, Rsrc2 Shift Left Logical Variable Sll Rdest, Rsrc1, Src2 Shift Left Logical Rotate the contents of register Rsrc1 left (right) by theĭistance indicated by Src2 and put the result in register Operand is negative, the remainder is unspecified by the MIPS Put the remainder from dividing the integer in register Rsrc1 by Remu Rdest, Rsrc1, Src2 Unsigned Remainder ¶ Put the logical OR of the integers from register Rsrc1 and Src2 (or Imm) into register Rdest. Put the bitwise logical negation of the integer from register Rsrc into register Rdest. Put the logical NOR of the integers from register Rsrc1 and Put the negative of the integer from register Rsrc into Negu Rdest, Rsrc Negate Value (without overflow) ¶ Neg Rdest, Rsrc Negate Value (with overflow) ¶ Of the product in register lo and the high-word in register hi. Multiply the contents of the two registers. Put the product of the integers from register Rsrc1 and Src2 into register Rdest. Mulou Rdest, Rsrc1, Src2 Unsigned Multiply (with overflow) ¶ Mulo Rdest, Rsrc1, Src2 Multiply (with overflow) ¶ Mul Rdest, Rsrc1, Src2 Multiply (without overflow) ¶ Put the quotient of the integers from register Rsrc1 and Src2 into register Rdest. If an operand is negative, the remainder is unspecified by the MIPSĪrchitecture and depends on the conventions of the machine on whichĭiv Rdest, Rsrc1, Src2 Divide (signed, with overflow) ¶ĭivu Rdest, Rsrc1, Src2 Divide (unsigned, without overflow) ¶ Register lo and the remainder in register hi. Put the logical AND of the integers from register Rsrc1 andĭivide the contents of the two registers.ĭivu treats is operands as unsigned values. Put the sum of the integers from register Rsrc1 and Src2 (or Imm) into register Rdest. Put the absolute value of the integer from register Rsrc inĪdd Rdest, Rsrc1, Src2 Addition (with overflow)Īddi Rdest, Rsrc1, Imm Addition Immediate (with overflow)Īddu Rdest, Rsrc1, Src2 Addition (without overflow)Īddiu Rdest, Rsrc1, Imm Addition Immediate (without overflow) Into the immediate form (e.g., addi) if the second argument is Translate the more general form of an instruction (e.g., add) Instructions are only included for reference. In all instructions below, Src2 can either be a register or an However, MIPS provides some instructions for Therefore, a halfword object must be stored at evenĪddresses and a full word object must be stored at addresses that areĪ multiple of 4. Quantity is aligned if its memory address is a multiple of its Most load and store instructions operate only on aligned data. Register contains a code from the following table describing the cause A bit becomes 1 when an interrupt at its level The five pending interrupt bits correspond to theįive interrupt levels. The current bits are both set to 0 (i.e., kernel mode with Interrupt, these six bits are shifted left by two bits, so the currentīits become the previous bits and the previous bits become the oldīits. If the interrupt enableīit is 1, interrupts are allowed. The kernel/userīit is 0 if the program was running in the kernel when the interrupt The low six bits of the Status register implement a three-level stack for the kernel/user and interrupt enable bits. One, interrupts at that level are allowed. The interrupt maskĬontains a bit for each of the five interrupt levels. However, it does provide theįigure 3 describes the bits in the Status Since they are not of much use in a simulator or are part of the SPIM does not implement all of these registers, In addition, coprocessor 0 contains registers that are useful to The objects in this heap can be quickly accessed Middle of a 64K block of memory in the heap that holds constants and Register $gp (28) is a global pointer that points into the (31) is written with the return address for a call by the jal Register $sp (29) is the stack pointer, which points to the last Registers $s0- $s7 (16-23) are callee-saved registers that hold long-lived values Registers $t0- $t9 (8-15, 24,Ģ5) are caller-saved registers used for temporary quantities that do Registers $v0 and $v1 (2, 3) are used to return Registers $a0- $a3 (4-7) are used to pass the firstįour arguments to routines (remaining arguments are passed on the Reserved for use by the assembler and operating system. Registers and describes their intended use. However a program that violates them will These suggestions are guidelines, which are notĮnforced by the hardware. MIPS has established a set of conventions as to how registers Register $0 always contains the hardwired valueĠ. Purpose 32-bit registers that are numbered 0-31. The MIPS (and SPIM) central processing unit contains 32 general
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