Re: using integer audio data
Re: using integer audio data
- Subject: Re: using integer audio data
- From: Paul Russell <email@hidden>
- Date: Wed, 22 Aug 2001 23:42:34 -0700
> This results in something along these lines:
mflr r0
bcl 20,31,L1$pb
L1$pb:
mflr r12
mtlr r0
xoris r3,r3,0x8000
stw r3,-4(r1)
lis r0,0x4330
addis r11,r12,ha16(LC0-L1$pb)
stw r0,-8(r1)
la r11,lo16(LC0-L1$pb)(r11)
lfd f1,-8(r1)
lfd f0,0(r11)
fsub f1,f1,f0
frsp f1,f1
blr
found that on musicdsp :
00000000: C8220000 lfd fp1,@1558(RTOC)
00000004: 6C608000 xoris r0,r3,$8000
00000008: 9001FFF4 stw r0,-12(SP)
0000000C: 3C004330 lis r0,17200
00000010: 9001FFF0 stw r0,-16(SP)
00000014: C801FFF0 lfd fp0,-16(SP)
00000018: EC200828 fsubs fp1,fp0,fp1
0000001C: 4E800020 blr
That looks very much like the code that CodeWarrior generates for int
to float conversion.
//Paul
--
| Paul Russell work: +1 831 420 1733 fax: +1 831 420 1732 |
| ARC Software Ltd home: +1 831 471 2154 email@hidden |
| Santa Cruz, CA cell: +1 831 325 7392
http://www.arc-software.com |