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Naive swap_float/double. Not sure sizeof(double) is 8 on m68k...

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22664 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
François Revol 2007-10-22 15:50:27 +00:00
parent 3c5bd34432
commit cb44673606
1 changed files with 5 additions and 46 deletions
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51
src/system/libroot/os/arch/m68k/byteorder.S
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@ -60,57 +60,16 @@ FUNCTION(__swap_int64):
*/
/* float __swap_float(float value)
* f1
*/
FUNCTION(__swap_float):
XXX: TODO
// push a stack frame
stwu %r1, -32(%r1)
mflr %r0
stw %r0, 36(%r1)
jmp __swap_int32
//rts
// %f1 -> %r3
stfs %f1, 20(%r1)
lwz %r3, 20(%r1)
// let __swap_int32 convert %r3
bl __swap_int32
// %r3 -> %f1
stw %r3, 20(%r1)
lfs %f1, 20(%r1)
// pop the stack frame
lwz %r0, 36(%r1)
mtlr %r0
addi %r1, %r1, 32
blr
/* double __swap_double(double value)
* f1
*/
FUNCTION(__swap_double):
XXX: TODO
// push a stack frame
stwu %r1, -32(%r1)
mflr %r0
stw %r0, 36(%r1)
// %f1 -> (%r3:%r4)
stfd %f1, 20(%r1)
lwz %r3, 20(%r1)
lwz %r4, 24(%r1)
// let __swap_int64 convert %r3:%r4
bl __swap_int64
// (%r3:%r4) -> %f1
stw %r3, 20(%r1)
stw %r4, 24(%r1)
lfd %f1, 20(%r1)
// pop the stack frame
lwz %r0, 36(%r1)
mtlr %r0
addi %r1, %r1, 32
blr
jmp __swap_int32
//rts
//XXX:check sizeof(double)