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Optimisation changes in saturation functions

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Changed saturation logic in ixheaacd_add32_sat()
and ixheaacd_sub32_sat() functions.

Bug: 154143053
Test: xaacdec

Change-Id: I2281954a18487c05894b8f5e9b76d1290c943b82
This commit is contained in:
Sushanth Patil 2019-10-29 10:25:01 +05:30 • committed by Ray Essick
parent 45895b998a
commit 0708a5228b
1 changed files with 4 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

14
decoder/ixheaacd_basic_ops32.h
View file

@ -180,11 +180,8 @@ static PLATFORM_INLINE WORD32 ixheaacd_add32_sat(WORD32 a, WORD32 b) {
sum = (WORD64)a + (WORD64)b;
if ((((WORD32)a ^ (WORD32)b) & (WORD32)MIN_32) == 0) {
if (((WORD32)sum ^ (WORD32)a) & (WORD32)MIN_32) {
sum = (a < 0) ? MIN_32 : MAX_32;
}
}
if (sum >= MAX_32) return MAX_32;
if (sum <= MIN_32) return MIN_32;
return (WORD32)sum;
}
@ -212,11 +209,8 @@ static PLATFORM_INLINE WORD32 ixheaacd_sub32_sat(WORD32 a, WORD32 b) {
diff = (WORD64)a - (WORD64)b;
if ((((WORD32)a ^ (WORD32)b) & (WORD32)MIN_32) != 0) {
if (((WORD32)diff ^ (WORD32)a) & (WORD32)MIN_32) {
diff = (a < 0L) ? MIN_32 : MAX_32;
}
}
if (diff >= MAX_32) return MAX_32;
if (diff <= MIN_32) return MIN_32;
return (WORD32)diff;
}