250b96a7bf
'SUBQ $-0x80, r' is shorter to encode than 'ADDQ $0x80, r', and functionally equivalent. Use it instead. Shaves off a few bytes here and there: file before after Δ % compile 25935856 25927664 -8192 -0.032% nm 4251840 4247744 -4096 -0.096% Change-Id: Ia9e02ea38cbded6a52a613b92e3a914f878d931e Reviewed-on: https://go-review.googlesource.com/c/go/+/168344 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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