diff options
Diffstat (limited to 'cpukit/score/cpu/sparc/cpu_asm.S')
| -rw-r--r-- | cpukit/score/cpu/sparc/cpu_asm.S | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/cpukit/score/cpu/sparc/cpu_asm.S b/cpukit/score/cpu/sparc/cpu_asm.S index 357e3dcbd4..201759df38 100644 --- a/cpukit/score/cpu/sparc/cpu_asm.S +++ b/cpukit/score/cpu/sparc/cpu_asm.S @@ -23,7 +23,31 @@ #include <asm.h> -#if (SPARC_HAS_FPU == 1) +/* + * void _CPU_Context_initialize_fp( + * void *fp_context_ptr + * ) + * + * This routine is responsible for initializing the FP context + * at *fp_context_ptr. All registers and FSR in the FP context + * are initailized to 0. + * + */ + + .align 4 + PUBLIC(_CPU_Context_initialize_fp) +SYM(_CPU_Context_initialize_fp): + set 0, %l1 +fpcontextinit: + std %g0, [%o0] ! write register fields of the FP context + add %l1, 1, %l1 + cmp %l1, 16 + bne fpcontextinit + add %o0, 8, %o0 + retl + st %g0, [%o0] ! write fsr field of the FP context + + /* * void _CPU_Context_save_fp( @@ -123,8 +147,6 @@ SYM(_CPU_Context_restore_fp): ret restore -#endif /* SPARC_HAS_FPU */ - /* * void _CPU_Context_switch( * Context_Control *run, |