diff options
Diffstat (limited to 'celt/fixed_generic.h')
| -rw-r--r-- | celt/fixed_generic.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/celt/fixed_generic.h b/celt/fixed_generic.h index 1cfd6d69..5f4abda7 100644 --- a/celt/fixed_generic.h +++ b/celt/fixed_generic.h @@ -104,6 +104,9 @@ /** Shift by a and round-to-neareast 32-bit value. Result is a 16-bit value */ #define ROUND16(x,a) (EXTRACT16(PSHR32((x),(a)))) +/** Shift by a and round-to-neareast 32-bit value. Result is a saturated 16-bit value */ +#define SROUND16(x,a) EXTRACT16(SATURATE(PSHR32(x,a), 32767)); + /** Divide by two */ #define HALF16(x) (SHR16(x,1)) #define HALF32(x) (SHR32(x,1)) @@ -117,6 +120,14 @@ /** Subtract two 32-bit values */ #define SUB32(a,b) ((opus_val32)(a)-(opus_val32)(b)) +/** Add two 32-bit values, ignore any overflows */ +#define ADD32_ovflw(a,b) ((opus_val32)((opus_uint32)(a)+(opus_uint32)(b))) +/** Subtract two 32-bit values, ignore any overflows */ +#define SUB32_ovflw(a,b) ((opus_val32)((opus_uint32)(a)-(opus_uint32)(b))) +/* Avoid MSVC warning C4146: unary minus operator applied to unsigned type */ +/** Negate 32-bit value, ignore any overflows */ +#define NEG32_ovflw(a) ((opus_val32)(0-(opus_uint32)(a))) + /** 16x16 multiplication where the result fits in 16 bits */ #define MULT16_16_16(a,b) ((((opus_val16)(a))*((opus_val16)(b)))) |