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ARM: vfp: rename check_exception to vfp_hw_state_valid

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Rename this branch to more accurately reflect why its taken, rather
than what the following code does.  It is the only caller of this code.
This helps to clarify following changes, yet this change results in no
actual code change.

Document the VFP hardware state at the target of this branch.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-07-09 14:24:36 +01:00
parent af61bdf035
commit 08409c33d6
1 changed files with 4 additions and 6 deletions
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10
arch/arm/vfp/vfphw.S
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@ -81,11 +81,8 @@ ENTRY(vfp_support_entry)
orr r1, r1, #FPEXC_EN @ user FPEXC has the enable bit set
ldr r4, [r3, r11, lsl #2] @ vfp_current_hw_state pointer
bic r5, r1, #FPEXC_EX @ make sure exceptions are disabled
cmp r4, r10
beq check_for_exception @ we are returning to the same
@ process, so the registers are
@ still there. In this case, we do
@ not want to drop a pending exception.
cmp r4, r10 @ this thread owns the hw context?
beq vfp_hw_state_valid
VFPFMXR FPEXC, r5 @ enable VFP, disable any pending
@ exceptions, so we can get at the
@ -132,7 +129,8 @@ no_old_VFP_process:
#endif
VFPFMXR FPSCR, r5 @ restore status
check_for_exception:
@ The context stored in the VFP hardware is up to date with this thread
vfp_hw_state_valid:
tst r1, #FPEXC_EX
bne process_exception @ might as well handle the pending
@ exception before retrying branch