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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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PM0214 Fiches technique(PDF) 69 Page - STMicroelectronics |
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PM0214 Fiches technique(HTML) 69 Page - STMicroelectronics |
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69 / 245 page  DocID022708 Rev 4 69/245 PM0214 The STM32 Cortex-M4 instruction set 244 3.4.1 ADR Load PC-relative address. Syntax ADR{cond} Rd, label where: • ‘cond’ is an optional condition code (see Conditional execution on page 64) • ‘Rd’ is the destination register • ‘label’ is a PC-relative expression (see PC-relative expressions on page 64) Operation ADR determines the address by adding an immediate value to the PC. It writes the result to the destination register. ADR produces position-independent code, because the address is PC-relative. If you use ADR to generate a target address for a BX or BLX instruction, you must ensure that bit[0] of the address you generate is set to1 for correct execution. Values of label must be within the range -4095 to 4095 from the address in the PC. Note: You might have to use the .W suffix to get the maximum offset range or to generate addresses that are not word-aligned (see Instruction width selection on page 67). Restrictions Rd must be neither SP nor PC. Condition flags This instruction does not change the flags. Examples ADR R1, TextMessage; write address value of a location labelled as ; TextMessage to R1 |
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