------- Additional Comments From fjahanian at apple dot com 2004-10-25 23:58 -------
I tried the last patch and for the following statement built with -O2 -mcpu=G5
(aaple's mixed mode)
I get the following instruction sequence. It looks OK to me. But David's case might be
different
than what I am looking at:
clock_start=(((double)clock())/((double)(100)));
bl L_clock$stub
rldicl r3,r3,0,32
lha r0,232(r29)
addis r2,r31,ha16(LC40-"L00000000008$pb")
std r3,456(r1)
lfd f12,lo16(LC40-"L00000000008$pb")(r2)
cmpwi cr7,r0,0
nop
lfd f13,456(r1)
fcfid f0,f13
fdiv f0,f0,f12
fctidz f0,f0
stfd f0,528(r1)
nop
nop
nop
ld r19,528(r1)
ble cr7,L147
...
ti+=((((double)clock())/((double)(100)))-clock_start);
L186:
bl L_clock$stub
rldicl r3,r3,0,32
rldicl r2,r19,0,32
std r3,464(r1)
std r2,472(r1)
addis r2,r31,ha16(LC40-"L00000000008$pb")
lfd f0,464(r1)
lfd f13,472(r1)
lwz r0,816(r30)
cmpwi cr7,r0,0
fcfid f12,f0
lfd f0,lo16(LC40-"L00000000008$pb")(r2)
fcfid f11,f13
addis r2,r31,ha16(LC39-"L00000000008$pb")
fdiv f12,f12,f0
lfd f0,lo16(LC39-"L00000000008$pb")(r2)
fsub f12,f12,f11
...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15286
