CPSC 355 Lecture 17: CPSC 355 - Lecture 17 – Oct 21st

• School: University of Calgary
• Department: Computer Science
• Course: CPSC 355
• Professor: Leonard Manzara

Document Summary

Cpsc 355 - lecture 17 oct 21st. Addr: expression specifying the address in memory to read from: loads register with 8 bytes read from ram, eg: ldr, 32-bit from: ldr wt, addr x22, [x29, 56] Load byte: form (32-bit only): ldrb wt, addr, loads 1 byte from ram into low-order part of wt, zero-extending high-order bits. Load signed byte: form (32-bit): ldrsb, form (64-bit): ldrsb, loads 1 byte from ram into low-order part of wt or xt, sign- Load halfword: form (32-bit): ldrh, loads 2 bytes from ram into wt, zero-extending high-order bits. Load signed halfword: form (64-bit): ldrsh, form (32-bit): ldrsh, loads 2 bytes from ram into wt, or xt, sign-extending high-order. Load signed word: form (64-bit only): ldrsw, loads 4 bytes from ram into xt, sign-extending high-order bits. Addr: expression specifying the address in memory to write to: stores doubleword (8-bytes) in xt to ram, eg: str, 64-bit form: str wt, addr x20, [x29, 56]