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| author | Mark Peek <mp@FreeBSD.org> | 2001-11-05 00:45:33 +0000 |
|---|---|---|
| committer | Mark Peek <mp@FreeBSD.org> | 2001-11-05 00:45:33 +0000 |
| commit | 8f718dfdc364db477026a133c1cd323109a245cf (patch) | |
| tree | 9b64b7ee5b3e7f4d586652a6359ba7388887958b /sys/powerpc/aim/swtch.S | |
| parent | b46884b5b96cbc704ae362f6061070255ba3fa76 (diff) | |
| download | src-8f718dfdc364db477026a133c1cd323109a245cf.tar.gz src-8f718dfdc364db477026a133c1cd323109a245cf.zip | |
Add enable_fpu/save_fpu for handling the floating point registers in the PCB.
Obtained from: NetBSD
Notes
Notes:
svn path=/head/; revision=86066
Diffstat (limited to 'sys/powerpc/aim/swtch.S')
| -rw-r--r-- | sys/powerpc/aim/swtch.S | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sys/powerpc/aim/swtch.S b/sys/powerpc/aim/swtch.S index 97c15a5c8548..c8002648b354 100644 --- a/sys/powerpc/aim/swtch.S +++ b/sys/powerpc/aim/swtch.S @@ -80,6 +80,14 @@ ENTRY(cpu_switch) mfcr %r4 /* Save the condition register */ stw %r4,PCB_CR(%r3) + lwz %r29,PCB_FLAGS(%r3) + andi. %r9, %r29, 1 /* XXX - don't hard code */ + beq .L1 + mr %r29, %r3 /* Save the PCB pointer */ + bl save_fpu + mr %r3, %r29 /* and restore it */ + +.L1: bl choosethread /* Find a new thread to run */ mr %r14,%r3 /* Save off the (struct thread *) */ @@ -91,6 +99,14 @@ ENTRY(cpu_switch) stw %r14,GD_CURTHREAD(%r4) /* Store new current thread */ lwz %r4,TD_PCB(%r14) /* Grab the new PCB */ + lwz %r29, PCB_FLAGS(%r4) /* Restore FPU regs if needed */ + andi. %r9, %r29, 1 + beq .L2 + mr %r29, %r4 + bl enable_fpu + mr %r4, %r29 + +.L2: lmw %r14,PCB_CONTEXT(%r4) /* Load the non-volatile GP regs */ lwz %r5,PCB_CR(%r4) /* Load the condition register */ mtcr %r5 |