1 / 6

Naming Conventions for Registers

0 $zero constant 0 (Hdware) 1 $at reserved for assembler 2 $v0 expression evaluation & 3 $v1 function results 4 $a0 arguments 5 $a1 6 $a2 7 $a3 8 $t0 temporary: caller saves . . . (callee can clobber) 15 $t7. 16 $s0 callee saves . . . (caller can clobber) 23 $s7

yen
Download Presentation

Naming Conventions for Registers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 0 $zero constant 0 (Hdware) 1 $at reserved for assembler 2 $v0 expression evaluation & 3 $v1 function results 4 $a0 arguments 5 $a1 6 $a2 7 $a3 8 $t0 temporary: caller saves . . . (callee can clobber) 15 $t7 16 $s0 callee saves . . . (caller can clobber) 23 $s7 24 $t8 temporary (cont’d) 25 $t9 26 $k0 reserved for OS kernel 27 $k1 28 $gp pointer to global area 29 $sp stack pointer 30 $fp frame pointer 31 $ra return address (Hdware) Naming Conventions for Registers

  2. Review: MIPS ISA, so far

  3. Question I: Assume that memory has 232 addressable locations, and MIPS is 32-bit architecture. Please specify the width of the following address and data lines between the processor and the memory. read addr/ write addr Processor Addressable locations 232 read data Memory write data

  4. Question II: • Question 3.10 on page 199 (PH text book) • Question 3.5 on page 198 (PH text book)

  5. Question III: • What if the branch destination is further away than can be captured in 16 bits? What can the assembler do to alleviate this problem? beq $s0, $s1, L1

  6. Question IV: Give the machine code for the following assembly code segment: (you may use the combination of decimal, hexidecima, and/or binary encodings.) 0x00400040 Loop: add $t1, $s3, $s3 add $t1, $t1, $t1 add $t1, $t1, $s6 lw $t0, 0($t1) bne $t0, $s5, Exit add $s3, $s3, $s4 j Loop Exit:

More Related