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Home » ARM and Thumb Instructions » LDR (immediate offset) . For word loads, Rt can be the PC. A load to the PC causes a branch to the address loaded. 22 Aug 2008 Thumb instruction formats are less regular than ARM instruction formats, as .. The offset for branch instructions is calculated by the assembler:. ARM Instruction Set. This chapter describes the ARM instruction set. 4.1. Instruction Set Summary. 4-2. 4.2. The Condition Field. 4-5. 4.3. Branch and Exchange B, BL, BX, BLX, and BXJ Branch, Branch with Link, Branch and exchange instruction set, Branch with Link and exchange instruction set, Branch and change to We'll be working with the ARM instruction set architecture .. Conditional branch instructions contain a signed 24-bit offset that . LDREQ r12, [r0, -r7, LSL #3] When executing an ARM instruction, PC reads as the address of the current instruction plus 8. The LS means if lower or same LDREQ would be load if equal. Normally you would have a branch table with [ra,rb,lsl #2] where ra is the base Home > ARM and Thumb Instructions > Memory access instructions > LDR (register-relative) A load to the PC causes a branch to the address loaded. Branch `develop` is where “mainline development” occurs; when `develop` The first string is always the instruction mnemonic and the second is any . ARM. label: ldreq r1,[r2],#4. add r1,r2. WORD 0xFEED,0xACE`;. (* expected output:. The ARM call instruction (branch-with-link) doesn't use the stack directly. . within the bounds of the sandbox, and then the ldreq loads if (and only if) it was. Unconditional branches: b, and mov pc, rn in ARM °Some Branch Conditions after cmp instruction: °b .. Conditional Instructions: addeq, ldreq,etc in ARM.