diff options
Diffstat (limited to 'cpukit/score/cpu/m68k/rtems/score/cpu.h')
| -rw-r--r-- | cpukit/score/cpu/m68k/rtems/score/cpu.h | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/cpukit/score/cpu/m68k/rtems/score/cpu.h b/cpukit/score/cpu/m68k/rtems/score/cpu.h index 0b9aa2df6d..2be10c9638 100644 --- a/cpukit/score/cpu/m68k/rtems/score/cpu.h +++ b/cpukit/score/cpu/m68k/rtems/score/cpu.h @@ -172,12 +172,6 @@ typedef struct { } _operand2; } Context_Control_fp; - /* - * This software FP implementation is only for GCC. - */ - #define _CPU_Context_Fp_start( _base, _offset ) \ - ((void *) _Addresses_Add_offset( (_base), (_offset) ) ) - #define _CPU_Context_Initialize_fp( _fp_area ) \ { \ Context_Control_fp *_fp; \ @@ -234,9 +228,6 @@ typedef struct { #endif } Context_Control_fp; - #define _CPU_Context_Fp_start( _base, _offset ) \ - ((void *) _Addresses_Add_offset( (_base), (_offset) )) - /* * The reset value for all context relevant registers except the FP data * registers is zero. The reset value of the FP data register is NAN. The @@ -260,17 +251,15 @@ typedef struct { uint8_t fp_save_area [M68K_FP_STATE_SIZE + 112]; } Context_Control_fp; - #define _CPU_Context_Fp_start( _base, _offset ) \ - ( \ - (void *) _Addresses_Add_offset( \ - (_base), \ - (_offset) + CPU_CONTEXT_FP_SIZE - 4 \ - ) \ - ) - + /* + * The floating-point context is saved/restored via FSAVE/FRESTORE which + * use a growing down stack. Initialize the stack and adjust the FP area + * pointer accordingly. + */ #define _CPU_Context_Initialize_fp( _fp_area ) \ { \ - uint32_t *_fp_context = (uint32_t *)*(_fp_area); \ + uint32_t *_fp_context = _Addresses_Add_offset( \ + *(_fp_area), CPU_CONTEXT_FP_SIZE - 4); \ *(--(_fp_context)) = 0; \ *(_fp_area) = (void *)(_fp_context); \ } |