Arm64Emitter: Add MOVPage2R utility function #11294
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This new function is like MOVP2R, except it masks out the lower 12 bits, returning them instead of writing them to the register. These lower 12 bits can then be used as an offset for LDR/STR. This lets us turn ADRP+ADD+LDR sequences with a zero offset into ADRP+LDR sequences with a non-zero offset, saving one instruction.
lioncash
approved these changes
Nov 23, 2022
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This new function is like MOVP2R, except it masks out the lower 12 bits, returning them instead of writing them to the register. These lower 12 bits can then be used as an offset for LDR/STR. This lets us turn ADRP+ADD+LDR sequences with a zero offset into ADRP+LDR sequences with a non-zero offset, saving one instruction.