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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// This header file includes the inline functions in
// the fix point signal processing library.
#ifndef WEBRTC_SPL_SPL_INL_H_
#define WEBRTC_SPL_SPL_INL_H_
#ifdef WEBRTC_SPL_INLINE_CALLS
#ifdef WEBRTC_ANDROID
WEBRTC_INLINE WebRtc_Word32 WEBRTC_SPL_MUL(WebRtc_Word32 a, WebRtc_Word32 b)
{
WebRtc_Word32 tmp;
__asm__("mul %0, %1, %2":"=r"(tmp):"r"(a), "r"(b));
return tmp;
}
WEBRTC_INLINE WebRtc_Word32 WEBRTC_SPL_MUL_16_32_RSFT16(WebRtc_Word16 a,
WebRtc_Word32 b)
{
WebRtc_Word32 tmp;
__asm__("smulwb %0, %1, %2":"=r"(tmp):"r"(b), "r"(a));
return tmp;
}
WEBRTC_INLINE WebRtc_Word32 WEBRTC_SPL_MUL_32_32_RSFT32(WebRtc_Word16 a,
WebRtc_Word16 b,
WebRtc_Word32 c)
{
WebRtc_Word32 tmp;
__asm__("pkhbt %0, %1, %2, lsl #16" : "=r"(tmp) : "r"(b), "r"(a));
__asm__("smmul %0, %1, %2":"=r"(tmp):"r"(tmp), "r"(c));
return tmp;
}
WEBRTC_INLINE WebRtc_Word32 WEBRTC_SPL_MUL_32_32_RSFT32BI(
WebRtc_Word32 a,
WebRtc_Word32 b)
{
WebRtc_Word32 tmp;
__asm__("smmul %0, %1, %2":"=r"(tmp):"r"(a), "r"(b));
return tmp;
}
WEBRTC_INLINE WebRtc_Word32 WEBRTC_SPL_MUL_16_16(WebRtc_Word16 a,
WebRtc_Word16 b)
{
WebRtc_Word32 tmp;
__asm__("smulbb %0, %1, %2":"=r"(tmp):"r"(a), "r"(b));
return tmp;
}
WEBRTC_INLINE WebRtc_Word16 WebRtcSpl_AddSatW16(WebRtc_Word16 a,
WebRtc_Word16 b)
{
WebRtc_Word32 s_sum;
__asm__("qadd16 %0, %1, %2":"=r"(s_sum):"r"(a), "r"(b));
return (WebRtc_Word16) s_sum;
}
WEBRTC_INLINE WebRtc_Word32 WebRtcSpl_AddSatW32(WebRtc_Word32 l_var1,
WebRtc_Word32 l_var2)
{
WebRtc_Word32 l_sum;
__asm__("qadd %0, %1, %2":"=r"(l_sum):"r"(l_var1), "r"(l_var2));
return l_sum;
}
WEBRTC_INLINE WebRtc_Word16 WebRtcSpl_SubSatW16(WebRtc_Word16 var1,
WebRtc_Word16 var2)
{
WebRtc_Word32 s_sub;
__asm__("qsub16 %0, %1, %2":"=r"(s_sub):"r"(var1), "r"(var2));
return (WebRtc_Word16)s_sub;
}
WEBRTC_INLINE WebRtc_Word32 WebRtcSpl_SubSatW32(WebRtc_Word32 l_var1,
WebRtc_Word32 l_var2)
{
WebRtc_Word32 l_sub;
__asm__("qsub %0, %1, %2":"=r"(l_sub):"r"(l_var1), "r"(l_var2));
return l_sub;
}
WEBRTC_INLINE WebRtc_Word16 WebRtcSpl_GetSizeInBits(WebRtc_UWord32 n)
{
WebRtc_Word32 tmp;
__asm__("clz %0, %1":"=r"(tmp):"r"(n));
return (WebRtc_Word16)(32 - tmp);
}
WEBRTC_INLINE int WebRtcSpl_NormW32(WebRtc_Word32 a)
{
WebRtc_Word32 tmp;
if (a <= 0) a ^= 0xFFFFFFFF;
__asm__("clz %0, %1":"=r"(tmp):"r"(a));
return tmp - 1;
}
WEBRTC_INLINE int WebRtcSpl_NormW16(WebRtc_Word16 a)
{
int zeros;
if (a <= 0) a ^= 0xFFFF;
if (!(0xFF80 & a)) zeros = 8; else zeros = 0;
if (!(0xF800 & (a << zeros))) zeros += 4;
if (!(0xE000 & (a << zeros))) zeros += 2;
if (!(0xC000 & (a << zeros))) zeros += 1;
return zeros;
}
WEBRTC_INLINE int WebRtcSpl_NormU32(WebRtc_UWord32 a)
{
int tmp;
if (a == 0) return 0;
__asm__("clz %0, %1":"=r"(tmp):"r"(a));
return tmp;
}
#else
WEBRTC_INLINE WebRtc_Word16 WebRtcSpl_AddSatW16(WebRtc_Word16 a,
WebRtc_Word16 b)
{
WebRtc_Word32 s_sum = (WebRtc_Word32) a + (WebRtc_Word32) b;
if (s_sum > WEBRTC_SPL_WORD16_MAX)
s_sum = WEBRTC_SPL_WORD16_MAX;
else if (s_sum < WEBRTC_SPL_WORD16_MIN)
s_sum = WEBRTC_SPL_WORD16_MIN;
return (WebRtc_Word16)s_sum;
}
WEBRTC_INLINE WebRtc_Word32 WebRtcSpl_AddSatW32(WebRtc_Word32 l_var1,
WebRtc_Word32 l_var2)
{
WebRtc_Word32 l_sum;
// perform long addition
l_sum = l_var1 + l_var2;
// check for under or overflow
if (WEBRTC_SPL_IS_NEG (l_var1))
{
if (WEBRTC_SPL_IS_NEG (l_var2) && !WEBRTC_SPL_IS_NEG (l_sum))
{
l_sum = (WebRtc_Word32)0x80000000;
}
}
else
{
if (!WEBRTC_SPL_IS_NEG (l_var2) && WEBRTC_SPL_IS_NEG (l_sum))
{
l_sum = (WebRtc_Word32)0x7FFFFFFF;
}
}
return l_sum;
}
WEBRTC_INLINE WebRtc_Word16 WebRtcSpl_SubSatW16( WebRtc_Word16 var1,
WebRtc_Word16 var2)
{
WebRtc_Word32 l_diff;
WebRtc_Word16 s_diff;
// perform subtraction
l_diff = (WebRtc_Word32)var1 - (WebRtc_Word32)var2;
// default setting
s_diff = (WebRtc_Word16) l_diff;
// check for overflow
if (l_diff > (WebRtc_Word32)32767)
s_diff = (WebRtc_Word16)32767;
// check for underflow
if (l_diff < (WebRtc_Word32)-32768)
s_diff = (WebRtc_Word16)-32768;
return s_diff;
}
WEBRTC_INLINE WebRtc_Word32 WebRtcSpl_SubSatW32(WebRtc_Word32 l_var1,
WebRtc_Word32 l_var2)
{
WebRtc_Word32 l_diff;
// perform subtraction
l_diff = l_var1 - l_var2;
// check for underflow
if ((l_var1 < 0) && (l_var2 > 0) && (l_diff > 0))
l_diff = (WebRtc_Word32)0x80000000;
// check for overflow
if ((l_var1 > 0) && (l_var2 < 0) && (l_diff < 0))
l_diff = (WebRtc_Word32)0x7FFFFFFF;
return l_diff;
}
WEBRTC_INLINE WebRtc_Word16 WebRtcSpl_GetSizeInBits(WebRtc_UWord32 n)
{
int bits;
if ((0xFFFF0000 & n)) bits = 16; else bits = 0;
if ((0x0000FF00 & (n >> bits))) bits += 8;
if ((0x000000F0 & (n >> bits))) bits += 4;
if ((0x0000000C & (n >> bits))) bits += 2;
if ((0x00000002 & (n >> bits))) bits += 1;
if ((0x00000001 & (n >> bits))) bits += 1;
return bits;
}
WEBRTC_INLINE int WebRtcSpl_NormW32(WebRtc_Word32 a)
{
int zeros;
if (a <= 0) a ^= 0xFFFFFFFF;
if (!(0xFFFF8000 & a)) zeros = 16; else zeros = 0;
if (!(0xFF800000 & (a << zeros))) zeros += 8;
if (!(0xF8000000 & (a << zeros))) zeros += 4;
if (!(0xE0000000 & (a << zeros))) zeros += 2;
if (!(0xC0000000 & (a << zeros))) zeros += 1;
return zeros;
}
WEBRTC_INLINE int WebRtcSpl_NormW16(WebRtc_Word16 a)
{
int zeros;
if (a <= 0) a ^= 0xFFFF;
if (!(0xFF80 & a)) zeros = 8; else zeros = 0;
if (!(0xF800 & (a << zeros))) zeros += 4;
if (!(0xE000 & (a << zeros))) zeros += 2;
if (!(0xC000 & (a << zeros))) zeros += 1;
return zeros;
}
WEBRTC_INLINE int WebRtcSpl_NormU32(WebRtc_UWord32 a)
{
int zeros;
if (a == 0) return 0;
if (!(0xFFFF0000 & a)) zeros = 16; else zeros = 0;
if (!(0xFF000000 & (a << zeros))) zeros += 8;
if (!(0xF0000000 & (a << zeros))) zeros += 4;
if (!(0xC0000000 & (a << zeros))) zeros += 2;
if (!(0x80000000 & (a << zeros))) zeros += 1;
return zeros;
}
#endif // WEBRTC_ANDROID
#endif // WEBRTC_SPL_INLINE_CALLS
#endif // WEBRTC_SPL_SPL_INL_H_
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