ref: ab148485dab4c8a66866d02852940bcdac19851d
dir: /silk/arm/macros_armv4.h/
/***********************************************************************
Copyright (C) 2013 Xiph.Org Foundation and contributors.
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modification, are permitted provided that the following conditions
are met:
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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#ifndef SILK_MACROS_ARMv4_H
#define SILK_MACROS_ARMv4_H
/* (a32 * (opus_int32)((opus_int16)(b32))) >> 16 output have to be 32bit int */
#undef silk_SMULWB
static OPUS_INLINE opus_int32 silk_SMULWB_armv4(opus_int32 a, opus_int16 b)
{
unsigned rd_lo;
int rd_hi;
__asm__(
"#silk_SMULWB\n\t"
"smull %0, %1, %2, %3\n\t"
: "=&r"(rd_lo), "=&r"(rd_hi)
: "%r"(a), "r"(b<<16)
);
return rd_hi;
}
#define silk_SMULWB(a, b) (silk_SMULWB_armv4(a, b))
/* a32 + (b32 * (opus_int32)((opus_int16)(c32))) >> 16 output have to be 32bit int */
#undef silk_SMLAWB
#define silk_SMLAWB(a, b, c) ((a) + silk_SMULWB(b, c))
/* (a32 * (b32 >> 16)) >> 16 */
#undef silk_SMULWT
static OPUS_INLINE opus_int32 silk_SMULWT_armv4(opus_int32 a, opus_int32 b)
{
unsigned rd_lo;
int rd_hi;
__asm__(
"#silk_SMULWT\n\t"
"smull %0, %1, %2, %3\n\t"
: "=&r"(rd_lo), "=&r"(rd_hi)
: "%r"(a), "r"(b&~0xFFFF)
);
return rd_hi;
}
#define silk_SMULWT(a, b) (silk_SMULWT_armv4(a, b))
/* a32 + (b32 * (c32 >> 16)) >> 16 */
#undef silk_SMLAWT
#define silk_SMLAWT(a, b, c) ((a) + silk_SMULWT(b, c))
/* (a32 * b32) >> 16 */
#undef silk_SMULWW
static OPUS_INLINE opus_int32 silk_SMULWW_armv4(opus_int32 a, opus_int32 b)
{
unsigned rd_lo;
int rd_hi;
__asm__(
"#silk_SMULWW\n\t"
"smull %0, %1, %2, %3\n\t"
: "=&r"(rd_lo), "=&r"(rd_hi)
: "%r"(a), "r"(b)
);
return (rd_hi<<16)+(rd_lo>>16);
}
#define silk_SMULWW(a, b) (silk_SMULWW_armv4(a, b))
#undef silk_SMLAWW
static OPUS_INLINE opus_int32 silk_SMLAWW_armv4(opus_int32 a, opus_int32 b,
opus_int32 c)
{
unsigned rd_lo;
int rd_hi;
__asm__(
"#silk_SMLAWW\n\t"
"smull %0, %1, %2, %3\n\t"
: "=&r"(rd_lo), "=&r"(rd_hi)
: "%r"(b), "r"(c)
);
return a+(rd_hi<<16)+(rd_lo>>16);
}
#define silk_SMLAWW(a, b, c) (silk_SMLAWW_armv4(a, b, c))
#endif /* SILK_MACROS_ARMv4_H */