diff options
| author | Jason Wright <jason@cvs.openbsd.org> | 2003-01-24 21:30:16 +0000 |
|---|---|---|
| committer | Jason Wright <jason@cvs.openbsd.org> | 2003-01-24 21:30:16 +0000 |
| commit | 79c96310c25bb5418cfc2f7bb80dcfc72eef300a (patch) | |
| tree | 84f9227f73c0fef229a415320310f6810c091321 /lib/libpthread/arch/sparc64 | |
| parent | d79b1bd94bad2e4cebe673658ecc1d26ce4600b7 (diff) | |
On save:
If the fpu isn't enabled, don't save state, otherwise, save the state,
mark both sides clean and disable the fpu.
On restore:
If the saved fpu state has the fpu disabled, do nothing, otherwise, restore
everything.
Diffstat (limited to 'lib/libpthread/arch/sparc64')
| -rw-r--r-- | lib/libpthread/arch/sparc64/uthread_machdep_asm.S | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/lib/libpthread/arch/sparc64/uthread_machdep_asm.S b/lib/libpthread/arch/sparc64/uthread_machdep_asm.S index 7661fe6f313..a996dfc7a03 100644 --- a/lib/libpthread/arch/sparc64/uthread_machdep_asm.S +++ b/lib/libpthread/arch/sparc64/uthread_machdep_asm.S @@ -1,4 +1,4 @@ -/* $OpenBSD: uthread_machdep_asm.S,v 1.5 2003/01/24 21:05:45 jason Exp $ */ +/* $OpenBSD: uthread_machdep_asm.S,v 1.6 2003/01/24 21:30:15 jason Exp $ */ /* David Leonard <d@csee.uq.edu.au>. Public domain. */ #include <machine/asm.h> @@ -44,6 +44,10 @@ ENTRY(_thread_machdep_switch) ENTRY(_thread_machdep_fpsave) rd %fprs, %o1 stx %o1, [%o0] + andcc %o1, FPRS_ENA, %g0 + bz 1f + nop + stx %fsr, [%o0 + 8] add %o0, 16, %o0 @@ -81,11 +85,19 @@ ENTRY(_thread_machdep_fpsave) std %f60, [%o0 + 30 * 8] std %f62, [%o0 + 31 * 8] + /* disable fpu and mark both sides clean */ + wr %o1, FPRS_ENA|FPRS_DL|FPRS_DU, %fprs + +1: retl nop ENTRY(_thread_machdep_fprestore) ldx [%o0], %o1 /* o1 = fprs */ + andcc %o1, FPRS_ENA, %g0 + bz 1f + nop + wr %o1, 0, %fprs ldx [%o0 + 8], %fsr add %o0, 16, %o0 @@ -123,6 +135,6 @@ ENTRY(_thread_machdep_fprestore) ldd [%o0 + 29 * 8], %f58 ldd [%o0 + 30 * 8], %f60 ldd [%o0 + 31 * 8], %f62 - +1: retl nop |