motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-12-17 21:26:13 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add missing softfloat helpers.

Browse source 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2518 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
j_mayer 2007-03-20 22:10:42 +00:00
parent b1e341ebb7
commit 75d62a5856
4 changed files with 158 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

48
fpu/softfloat.c
View file

@ -1164,6 +1164,27 @@ float32 int64_to_float32( int64 a STATUS_PARAM )
}
float64 uint64_to_float32( uint64 a STATUS_PARAM )
{
int8 shiftCount;
if ( a == 0 ) return 0;
shiftCount = countLeadingZeros64( a ) - 40;
if ( 0 <= shiftCount ) {
return packFloat32( 1 > 0, 0x95 - shiftCount, a<<shiftCount );
}
else {
shiftCount += 7;
if ( shiftCount < 0 ) {
shift64RightJamming( a, - shiftCount, &a );
}
else {
a <<= shiftCount;
}
return roundAndPackFloat32( 1 > 0, 0x9C - shiftCount, a STATUS_VAR );
}
}
/*----------------------------------------------------------------------------
| Returns the result of converting the 64-bit two's complement integer `a'
| to the double-precision floating-point format. The conversion is performed
@ -1183,6 +1204,13 @@ float64 int64_to_float64( int64 a STATUS_PARAM )
}
float64 uint64_to_float64( uint64 a STATUS_PARAM )
{
if ( a == 0 ) return 0;
return normalizeRoundAndPackFloat64( 0, 0x43C, a STATUS_VAR );
}
#ifdef FLOATX80
/*----------------------------------------------------------------------------
@ -5282,6 +5310,26 @@ unsigned int float64_to_uint32_round_to_zero( float64 a STATUS_PARAM )
return res;
}
uint64_t float64_to_uint64 (float64 a STATUS_PARAM)
{
int64_t v;
v = int64_to_float64(INT64_MIN STATUS_VAR);
v = float64_to_int64((a + v) STATUS_VAR);
return v - INT64_MIN;
}
uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM)
{
int64_t v;
v = int64_to_float64(INT64_MIN STATUS_VAR);
v = float64_to_int64_round_to_zero((a + v) STATUS_VAR);
return v - INT64_MIN;
}
#define COMPARE(s, nan_exp) \
INLINE int float ## s ## _compare_internal( float ## s a, float ## s b, \
int is_quiet STATUS_PARAM ) \