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Remove casts on < 16x16 variance.

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These blocks will never overflow since max sum is +/-255*w*h.

Change-Id: Ia2c630339fd9cfb411b56b6040ff402095f12a2e
This commit is contained in:
Alex Converse 2015-11-19 15:39:40 -08:00
parent b2ccb9c189
commit ccb894ce73
1 changed files with 6 additions and 6 deletions
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12
vpx_dsp/x86/variance_sse2.c
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@ -171,7 +171,7 @@ unsigned int vpx_variance4x4_sse2(const unsigned char *src, int src_stride,
unsigned int *sse) {
int sum;
get4x4var_sse2(src, src_stride, ref, ref_stride, sse, &sum);
return *sse - (((unsigned int)sum * sum) >> 4);
return *sse - ((sum * sum) >> 4);
}
unsigned int vpx_variance8x4_sse2(const uint8_t *src, int src_stride,
@ -180,7 +180,7 @@ unsigned int vpx_variance8x4_sse2(const uint8_t *src, int src_stride,
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 8, 4,
sse, &sum, get4x4var_sse2, 4);
return *sse - (((unsigned int)sum * sum) >> 5);
return *sse - ((sum * sum) >> 5);
}
unsigned int vpx_variance4x8_sse2(const uint8_t *src, int src_stride,
@ -189,7 +189,7 @@ unsigned int vpx_variance4x8_sse2(const uint8_t *src, int src_stride,
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 4, 8,
sse, &sum, get4x4var_sse2, 4);
return *sse - (((unsigned int)sum * sum) >> 5);
return *sse - ((sum * sum) >> 5);
}
unsigned int vpx_variance8x8_sse2(const unsigned char *src, int src_stride,
@ -197,7 +197,7 @@ unsigned int vpx_variance8x8_sse2(const unsigned char *src, int src_stride,
unsigned int *sse) {
int sum;
vpx_get8x8var_sse2(src, src_stride, ref, ref_stride, sse, &sum);
return *sse - (((unsigned int)sum * sum) >> 6);
return *sse - ((sum * sum) >> 6);
}
unsigned int vpx_variance16x8_sse2(const unsigned char *src, int src_stride,
@ -206,7 +206,7 @@ unsigned int vpx_variance16x8_sse2(const unsigned char *src, int src_stride,
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 16, 8,
sse, &sum, vpx_get8x8var_sse2, 8);
return *sse - (((unsigned int)sum * sum) >> 7);
return *sse - ((sum * sum) >> 7);
}
unsigned int vpx_variance8x16_sse2(const unsigned char *src, int src_stride,
@ -215,7 +215,7 @@ unsigned int vpx_variance8x16_sse2(const unsigned char *src, int src_stride,
int sum;
variance_sse2(src, src_stride, ref, ref_stride, 8, 16,
sse, &sum, vpx_get8x8var_sse2, 8);
return *sse - (((unsigned int)sum * sum) >> 7);
return *sse - ((sum * sum) >> 7);
}
unsigned int vpx_variance16x16_sse2(const unsigned char *src, int src_stride,