diff options
| author |   miod <miod@openbsd.org> | 2007-03-02 06:11:52 +0000 |
|---|---|---|
| committer | miod <miod@openbsd.org> | 2007-03-02 06:11:52 +0000 |
| commit | 243b5df446d5f4ce83bb376b1240a8a96ea22b23 (patch) | |
| tree | dd88f5cc1fce930b7242a301dc74fdfff077b32c /lib/libpthread/arch/sh/uthread_machdep_asm.S | |
| parent | Sync rcsnum.c with OpenCVS, from Charles Longeau. (diff) | |
| download | wireguard-openbsd-243b5df446d5f4ce83bb376b1240a8a96ea22b23.tar.xz wireguard-openbsd-243b5df446d5f4ce83bb376b1240a8a96ea22b23.zip | |
Move landisk to hardware floating point. At the moment the FPU context is
always saved upon context switches, as FPU registers are heavily used for
long long computations (don't ask). Gcc default to -m4.
Credits to drahn@ otto@ and deraadt@ for feedback and help testing.
Upgrade procedure if you don't want to use the damn snapshots:
- build and install new kernel, reboot off it
- build new gcc, do not install it yet
- make includes
- install new gcc
- build and install lib/csu and lib/libc
- make build
Diffstat (limited to 'lib/libpthread/arch/sh/uthread_machdep_asm.S')
| -rw-r--r-- | lib/libpthread/arch/sh/uthread_machdep_asm.S | 56 |
1 files changed, 49 insertions, 7 deletions
diff --git a/lib/libpthread/arch/sh/uthread_machdep_asm.S b/lib/libpthread/arch/sh/uthread_machdep_asm.S index 702d5c04434..13b7111a692 100644 --- a/lib/libpthread/arch/sh/uthread_machdep_asm.S +++ b/lib/libpthread/arch/sh/uthread_machdep_asm.S @@ -1,4 +1,4 @@ -/* $OpenBSD: uthread_machdep_asm.S,v 1.1 2007/02/19 21:03:50 miod Exp $ */ +/* $OpenBSD: uthread_machdep_asm.S,v 1.2 2007/03/02 06:11:54 miod Exp $ */ /* * Copyright (c) 2007 Miodrag Vallat. @@ -27,7 +27,26 @@ ENTRY(_thread_machdep_switch) * On entry: r4 = new, r5 = oldsave */ - /* save caller-saved context on stack */ + /* + * Save current context on the stack. + */ +#if defined(__SH4__) && !defined(__SH4_NOFPU__) + sts.l fpscr, @-r15 + mov #0, r1 + sts.l fpul, @-r15 + lds r1, fpscr + fmov.s fr15, @-r15 /* note that we can't do double stores... */ + fmov.s fr14, @-r15 /* ...as we don't control stack alignment. */ + fmov.s fr13, @-r15 + fmov.s fr12, @-r15 + frchg + fmov.s fr15, @-r15 + fmov.s fr14, @-r15 + fmov.s fr13, @-r15 + fmov.s fr12, @-r15 +#endif + sts.l mach, @-r15 + sts.l macl, @-r15 mov.l r8, @-r15 mov.l r9, @-r15 mov.l r10, @-r15 @@ -37,13 +56,15 @@ ENTRY(_thread_machdep_switch) mov.l r14, @-r15 sts.l pr, @-r15 - /* save old stack */ + /* + * Switch stacks. + */ mov.l r15, @r5 - - /* switch stacks */ mov.l @r4, r15 - /* restore new context */ + /* + * Restore new context. + */ lds.l @r15+, pr mov.l @r15+, r14 mov.l @r15+, r13 @@ -51,5 +72,26 @@ ENTRY(_thread_machdep_switch) mov.l @r15+, r11 mov.l @r15+, r10 mov.l @r15+, r9 + mov.l @r15+, r8 + lds.l @r15+, macl +#if defined(__SH4__) && !defined(__SH4_NOFPU__) + mov #0, r1 + lds.l @r15+, mach + lds r1, fpscr + frchg + fmov.s @r15+, fr12 + fmov.s @r15+, fr13 + fmov.s @r15+, fr14 + fmov.s @r15+, fr15 + frchg + fmov.s @r15+, fr12 + fmov.s @r15+, fr13 + fmov.s @r15+, fr14 + fmov.s @r15+, fr15 + lds.l @r15+, fpul + rts + lds.l @r15+, fpscr +#else rts - mov.l @r15+, r8 + lds.l @r15+, mach +#endif |