87 0

On left side of assignment Load pointer value (the datas address) into register reg with lw Load data itself using the address 0(reg) lw t1, a_ptr t1 a_ptr (assume global) lw t2, 0(t1) t2 a_ptr memt10 could use lw t1, 0(t1) to save registers 11Pointers the operator / Pointers, part 2. / / This doesnt use pointers (yet) / / Print num then newline. / printf("d", num) putc(newline) / more later ... / continued... printf("d", num) li v0, 1 print int lw a0, -12(fp) num syscall Syscall 11 prints one character (in a0). putc(newline) li v0, 11 print char lbu a0, newline syscall more... 12Pointers the operator / Pointers, part 2. / / This doesnt use pointers (yet) / / Print num then newline. / printf("d", num) putc(newline) / more later ... / continued... printf("d", num) li v0, 1 print int lw a0, -12(fp) num syscall Syscall 11 prints one character (in a0). putc(newline) li v0, 11 print char lbu a0, newline syscall more... 13Pointers the operator continued... iptr 87 li t0, 87 t087 lw t1, -8(fp) t1iptr sw t0, 0(t1) iptr87 printf("d", iptr) li v0, 1 print int lw t0, -8(fp) t0iptr lw a0, 0(t0) a0iptr syscall putc(cptr) li v0, 11 print char lw t0, -4(fp) t0cptr lbu a0, 0(t0) a0cptr syscall / Pointers, part 3. / / Change num to 87 through iptr. / iptr 87 / Print num through iptr. / printf("d", iptr) / Print newline through cptr. / putc(cptr) exit(0) 14Pointers the operator continued... iptr 87 li t0, 87 t087 lw t1, -8(fp) t1iptr sw t0, 0(t1) iptr87 printf("d", iptr) li v0, 1 print int lw t0, -8(fp) t0iptr lw a0, 0(t0) a0iptr syscall putc(cptr) li v0, 11 print char lw t0, -4(fp) t0cptr lbu a0, 0(t0) a0cptr syscall / Pointers, part 3. / / Change num to 87 through iptr. / iptr 87 / Print num through iptr. / printf("d", iptr) / Print newline through cptr. / putc(cptr) exit(0) 15Why use pointers in MIPS?All the same reasons to use pointers in C to pass values to functions by reference for efficiency to have them modified to dynamically allocate memory e.g., with malloc() to implement self-referential data structures e.g., lists, trees to implement arrays by pointer/array duality and, by extension, strings (arrays of char) 16ArraysThe high-level programmers view array is accessed through indices 0, 1, 2, ...014916 17ArraysThe computers view array is part of memory, accessed through addresses 0x10012FC0, 0x10012FC4, ...00x10012FC010x10012FC440x10012FC890x10012FCC160x10012FD0 18ArraysTo program arrays in assembly language, need to understand relationship between indices and addresses, and need to convert between them.a00x10012FC0a1 0x10012FC4a2 0x10012FC8a3 0x10012FCCa4 0x10012FD0 19Arraysaddresses for a given array, address of first element is constant (here, 0x10012FC0)arrays first index is always 0a00x10012FC0a1 0x10012FC4a2 0x10012FC8a3 0x10012FCCa4 0x10012FD0 20Arraysarrays adjacent indices differ by 1addresses addresses differ by size of array element type (here, 4 bytes for int)a00x10012FC0a1 0x10012FC4a2 0x10012FC8a3 0x10012FCCa4 0x10012FD0 21ArraysTo compute address of ai determine start address of array address of a0 numerically smallest address of entire array determine size of one element of a

Like That" (vocal) - (3:09) 87 BPM Mike Shepstone & Steve Ennever - "Do It Like That" (instrumental) - (2:30) 87 BPMMike Shepstone & Steve Ennever - "Do It Like That" (short) - (0:30) 87 BPM from $1.89DNB 74504 Dec 12Euro Dance/Pop Dance Strange Magic - (3:31) 70 BPMWeird Thoughts - (2:42) 70 BPM Music Box - (2:42) 55 BPMStrange Games - (3:15) 65 BPMBizarre March - (2:49) 80 BPMStrange Landscape - (3:10) 90 BPMWeird Reflexions - (2:54) 59 BPMOrganic Weirdness - (2:53) 85 BPMStrange Future - (2:54) 62 BPMGlitchy Mystery - (2:44) 93 BPMEvolving Strange - (2:44) 60 BPMChildish Minimal - (3:10) 87 BPM from $1.89DNB 98015 Feb 20Experimental/Electronic From Hell - (2:31) 60 BPMFight Against Fire - (2:47) 60 BPMPoisonous - (2:24) 58 BPMFantasy Island - (2:36) 110 BPMFighters Of Light - (2:15) 60 BPMThe World Is Burning - (3:08) 60 BPMDark Energetic - (2:44) 60 BPMRemnants - (3:03) 110 BPMCry Of Pain - (2:37) 60 BPMLabyrinths - (2:23) 110 BPMEqualizer - (2:32) 60 BPM Warriors Awakening - (3:14) 110 BPM from $1.89DNB 111323 Jan 21Experimental/Electronic Anticlockwise - (2:11) 95 BPMAnticlockwise (short version 1) - (0:20) 95 BPMAnticlockwise (short version 2) - (0:36) 95 BPMAnticlockwise (short version 3) - (1:07) 95 BPMBusy Intersection - (1:25) 160 BPMBusy Intersection (short version 1) - (0:19) 80 BPMBusy Intersection (short version 2) - (0:34) 80 BPMBusy Intersection (short version 3) - (1:04) 80 BPMEscaping Chase - (1:50) 150 BPM Escaping Chase (short version 1) - (0:16) 151 BPMEscaping Chase (short version 2) - (0:38) 150 BPMEscaping Chase (short version 3) - (1:06) 150 BPMMake Your Choice - (2:07) 64 BPMMake Your Choice (short version 1) - (0:20) 64 BPMMake Your Choice (short version 2) - (0:35) 64 BPMMake Your Choice (short version 3) - (1:05) 64 BPMObscure Presence - (1:47) 145 BPMObscure Presence (short version 1) - (0:19) 145 BPMObscure Presence (short version 2) - (0:34) 145 BPMObscure Presence (short version 3) - (1:05) 145 BPMPolice Grilling - (1:41) 130 BPMPolice Grilling (short version 1) - (0:20) 130 BPMPolice Grilling (short version 2) - (0:36) 130 BPMPolice Grilling (short version 3) - (1:04) 130 BPMRiding The Bullet - (1:24) 155 BPMRiding The Bullet (short version 1) - (0:20) 157 BPMRiding The Bullet (short version 2) - (0:36) 155 BPMRiding The Bullet (short version 3) - (1:01) 155 BPMSense Of Suspect - (1:47) 63 BPMSense Of Suspect (short version 1) - (0:21) 125 BPMSense Of Suspect (short version 2) - (0:36) 63 BPMSense Of Suspect (short version 3) - (1:07) 63 BPMShadow Behind - (1:37) 140 BPMShadow Behind (short version 1) - (0:19) 140 BPMShadow Behind (short version 2) - (0:35) 140 BPMShadow Behind (short version 3) - (1:08) 140 BPMUnfair Trade

See the output of the ansible command with the state changed, meaning in this case, that the package was found and installed.Status of the yum install command issued via ansible. In this case the package ncdu.x86_64 0:1.14-1.el7 was installed.Of course, all of the yum installer options can be used via ansible, including update, install, latest version, or remove.In the below example the same command was issued to remove the previously installed ncdu package.[root@ansible-server test_ansible]# ansible -i hosts all -m yum -a 'name=ncdu state=absent'host1 | SUCCESS => { "changed": true, "msg": "", "rc": 0, "results": [ "Loaded plugins: fastestmirror\nResolving Dependencies\n--> Running transaction check\n---> Package ncdu.x86_64 0:1.14-1.el7 will be erased\n--> Finished Dependency Resolution\n\nDependencies Resolved\n\n================================================================================\n Package Arch Version Repository Size\n================================================================================\nRemoving:\n ncdu x86_64 1.14-1.el7 @epel 87 k\n\nTransaction Summary\n================================================================================\nRemove 1 Package\n\nInstalled size: 87 k\nDownloading packages:\nRunning transaction check\nRunning transaction test\nTransaction test succeeded\nRunning transaction\n Erasing : ncdu-1.14-1.el7.x86_64 1/1 \n Verifying : ncdu-1.14-1.el7.x86_64 1/1 \n\nRemoved:\n ncdu.x86_64 0:1.14-1.el7 \n\nComplete!\n" ]}host2 | SUCCESS => { "changed": true, "msg": "", "rc": 0, "results": [ "Loaded plugins: fastestmirror\nResolving Dependencies\n--> Running transaction check\n---> Package ncdu.x86_64 0:1.14-1.el7 will be erased\n--> Finished Dependency Resolution\n\nDependencies Resolved\n\n================================================================================\n Package Arch Version Repository Size\n================================================================================\nRemoving:\n ncdu x86_64 1.14-1.el7 @epel 87 k\n\nTransaction Summary\n================================================================================\nRemove 1 Package\n\nInstalled size: 87 k\nDownloading packages:\nRunning transaction check\nRunning transaction test\nTransaction test succeeded\nRunning transaction\n Erasing : ncdu-1.14-1.el7.x86_64 1/1 \n Verifying : ncdu-1.14-1.el7.x86_64 1/1 \n\nRemoved:\n ncdu.x86_64 0:1.14-1.el7 \n\nComplete!\n" ]}Explanation:The output of the yum command shows that the package was removed.Another useful and essential feature that ansible uses to interact with the client’s server is to gather some facts about the