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simplify

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Originally committed as revision 5597 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-07-03 12:09:10 +00:00
parent 5351c29cbe
commit 767aeb11fb
1 changed files with 4 additions and 7 deletions
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11
libavutil/intfloat_readwrite.c
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@ -43,7 +43,7 @@ double av_ext2dbl(const AVExtFloat ext){
int e, i; int e, i;
for (i = 0; i < 8; i++) for (i = 0; i < 8; i++)
m |= (uint64_t)ext.mantissa[i]<<(56-(i<<3)); m = (m<<8) + ext.mantissa[i];
e = (((int)ext.exponent[0]&0x7f)<<8) | ext.exponent[1]; e = (((int)ext.exponent[0]&0x7f)<<8) | ext.exponent[1];
if (e == 0x7fff && m) if (e == 0x7fff && m)
return 0.0/0.0; return 0.0/0.0;
@ -51,7 +51,7 @@ double av_ext2dbl(const AVExtFloat ext){
* mantissa bit is written as opposed to the * mantissa bit is written as opposed to the
* single and double precision formats */ * single and double precision formats */
if (ext.exponent[0]&0x80) if (ext.exponent[0]&0x80)
return ldexp(-m, e); m= -m;
return ldexp(m, e); return ldexp(m, e);
} }
@ -72,7 +72,7 @@ int32_t av_flt2int(float d){
} }
AVExtFloat av_dbl2ext(double d){ AVExtFloat av_dbl2ext(double d){
struct AVExtFloat ext; struct AVExtFloat ext= {{0}};
int e, i; double f; uint64_t m; int e, i; double f; uint64_t m;
f = fabs(frexp(d, &e)); f = fabs(frexp(d, &e));
@ -83,11 +83,8 @@ AVExtFloat av_dbl2ext(double d){
m = (uint64_t)ldexp(f, 64); m = (uint64_t)ldexp(f, 64);
for (i=0; i < 8; i++) for (i=0; i < 8; i++)
ext.mantissa[i] = m>>(56-(i<<3)); ext.mantissa[i] = m>>(56-(i<<3));
} else if (f == 0.0) { } else if (f != 0.0) {
memset (&ext, 0, 10);
} else {
ext.exponent[0] = 0x7f; ext.exponent[1] = 0xff; ext.exponent[0] = 0x7f; ext.exponent[1] = 0xff;
memset (&ext.mantissa, 0, 8);
if (f != 1/0.0) if (f != 1/0.0)
ext.mantissa[0] = ~0; ext.mantissa[0] = ~0;
} }