https://codereview.chromium.org/220793002/diff/1/src/atomicops_internals_arm64_gcc.h
File src/atomicops_internals_arm64_gcc.h (right):
https://codereview.chromium.org/220793002/diff/1/src/atomicops_internals_arm64_gcc.h#newcode57
src/atomicops_internals_arm64_gcc.h:57: : [old_value]"IJr" (old_value),
On 2014/04/01 10:41:19, rmcilroy wrote:
Do the I and J constraints require that the value fit in an immediate
(12 bits)
or is it just a hint that an immediate should be used if it does fit?
It is just a hint. If the value does not fit it will use a register.
(Without them it uses always uses a register.)
https://codereview.chromium.org/220793002/
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