d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Unbreak cpu_switch(). The register allocator in my brain is clearly

Browse Source 
broken. Also, Altivec context switching worked before only by accident,
but should work now by design.
This commit is contained in:
Nathan Whitehorn 2009-10-31 20:59:13 +00:00
parent 011db0bc81
commit 156ef7611e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=198731
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
sys/powerpc/aim/swtch.S
View File

@ -99,17 +99,19 @@ ENTRY(cpu_switch)
mr %r14,%r3 /* Copy the old thread ptr... */
mr %r15,%r4 /* and the new thread ptr in scratch */
mr %r16,%r5 /* and the new lock */
mr %r17,%r6 /* and the PCB */
lwz %r6,PCB_FLAGS(%r5)
lwz %r7,PCB_FLAGS(%r17)
/* Save FPU context if needed */
andi. %r6, %r6, PCB_FPU
andi. %r7, %r7, PCB_FPU
beq .L1
bl save_fpu
.L1:
lwz %r6,PCB_FLAGS(%r5)
mr %r3,%r14 /* restore old thread ptr */
lwz %r7,PCB_FLAGS(%r17)
/* Save Altivec context if needed */
andi. %r6, %r6, PCB_VEC
andi. %r7, %r7, PCB_VEC
beq .L2
bl save_vec