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| author | Nathan Whitehorn <nwhitehorn@FreeBSD.org> | 2013-11-17 14:44:22 +0000 |
|---|---|---|
| committer | Nathan Whitehorn <nwhitehorn@FreeBSD.org> | 2013-11-17 14:44:22 +0000 |
| commit | debe44551207018d9b9e123536693e74acfd0bbd (patch) | |
| tree | faec530c93bef836627d6a6f15ff9981b38e2dbf /sys/powerpc/powerpc/fpu.c | |
| parent | 309c874c28b28bc44937a9410bfbbe2a7af7a468 (diff) | |
| download | src-debe44551207018d9b9e123536693e74acfd0bbd.tar.gz src-debe44551207018d9b9e123536693e74acfd0bbd.zip | |
Split the function of the PCB_FPU flags into two: PCB_FPU now indicates that
the actual FPU is enabled, while PCB_FPREGS indicates that the FPU state
structure in the PCB is valid. This separation reflects the situation on
FPU-less systems in which the FP state is used by the emulator but we don't
actually want to try to turn on the non-existant FPU.
Use this flag to save and restore FP regs properly on both AIM and Book-E.
As a side effect, this sets up hard-FP and Altivec on Book-E CPUs with such
abilities except for a trap handler to call enable_fpu()/enable_altivec().
Notes
Notes:
svn path=/head/; revision=258257
Diffstat (limited to 'sys/powerpc/powerpc/fpu.c')
| -rw-r--r-- | sys/powerpc/powerpc/fpu.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/powerpc/powerpc/fpu.c b/sys/powerpc/powerpc/fpu.c index c4cc326da431..b719218b704f 100644 --- a/sys/powerpc/powerpc/fpu.c +++ b/sys/powerpc/powerpc/fpu.c @@ -66,10 +66,11 @@ enable_fpu(struct thread *td) * initialise the FPU registers and FPSCR to 0, and set the flag * to indicate that the FPU is in use. */ + pcb->pcb_flags |= PCB_FPU; tf->srr1 |= PSL_FP; - if (!(pcb->pcb_flags & PCB_FPU)) { + if (!(pcb->pcb_flags & PCB_FPREGS)) { memset(&pcb->pcb_fpu, 0, sizeof pcb->pcb_fpu); - pcb->pcb_flags |= PCB_FPU; + pcb->pcb_flags |= PCB_FPREGS; } /* |