diff options
Diffstat (limited to 'celt/fixed_generic.h')
| -rw-r--r-- | celt/fixed_generic.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/celt/fixed_generic.h b/celt/fixed_generic.h index 71e28d6..657e67c 100644 --- a/celt/fixed_generic.h +++ b/celt/fixed_generic.h @@ -84,6 +84,8 @@ #define PSHR(a,shift) (SHR((a)+((EXTEND32(1)<<((shift))>>1)),shift)) #define SATURATE(x,a) (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x))) +#define SATURATE16(x) (EXTRACT16((x)>32767 ? 32767 : (x)<-32768 ? -32768 : (x))) + /** Shift by a and round-to-neareast 32-bit value. Result is a 16-bit value */ #define ROUND16(x,a) (EXTRACT16(PSHR32((x),(a)))) /** Divide by two */ @@ -108,10 +110,13 @@ /** 16x16 multiply-add where the result fits in 32 bits */ #define MAC16_16(c,a,b) (ADD32((c),MULT16_16((a),(b)))) -/** 16x32 multiply-add, followed by a 15-bit shift right. Results fits in 32 bits */ +/** 16x32 multiply, followed by a 15-bit shift right and 32-bit add. + b must fit in 31 bits. + Result fits in 32 bits. */ #define MAC16_32_Q15(c,a,b) ADD32(c,ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15))) #define MULT16_16_Q11_32(a,b) (SHR(MULT16_16((a),(b)),11)) +#define MULT16_16_Q11(a,b) (SHR(MULT16_16((a),(b)),11)) #define MULT16_16_Q13(a,b) (SHR(MULT16_16((a),(b)),13)) #define MULT16_16_Q14(a,b) (SHR(MULT16_16((a),(b)),14)) #define MULT16_16_Q15(a,b) (SHR(MULT16_16((a),(b)),15)) |