ref: ab0e7a237a6e9796c15a8858caac04dea3593d62
parent: ada850786c7e0a5d6024b7716db9896124fd483e
author: Johann <johannkoenig@google.com>
date: Tue Aug 2 11:59:35 EDT 2016
Use shifted value for sinpi8sqrt2 The value 35468 changes sign when stored in int16_t: implicit conversion from 'int' to 'int16_t' (aka 'short') changes value from 35468 to -30068 This negation requires adding back the original value to compensate. Shifting the value keeps the value positive and saves a post-vqdmulh shift. This technique is used in webp and idct_dequant_full_2x_neon BUG=b/28027557 Change-Id: I0c5ce09bea170fe08061856c2af6f841a557e0c3