diff options
| -rw-r--r-- | c/src/exec/score/cpu/m68k/m68k.h | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/c/src/exec/score/cpu/m68k/m68k.h b/c/src/exec/score/cpu/m68k/m68k.h index a6d24562d2..1d12e9ea10 100644 --- a/c/src/exec/score/cpu/m68k/m68k.h +++ b/c/src/exec/score/cpu/m68k/m68k.h @@ -37,10 +37,20 @@ extern "C" { * -m68040 -msoft-float * -m68040 * -m68040 -msoft-float - * -m68302 (no FP) - * -m68332 (no FP) + * -m68302 (no FP) (deprecated, use -m68000) + * -m68332 (no FP) (deprecated, use -mcpu32) * -mcpu32 (no FP) * + * As of gcc 2.8.1 and egcs 1.1, there is no distinction made between + * the CPU32 and CPU32+. The option -mcpu32 generates code which can + * be run on either core. RTEMS distinguishes between these two cores + * because they have different alignment rules which impact performance. + * If you are using a CPU32+, then the symbol RTEMS__mcpu32p__ should + * be defined in your custom file (see make/custom/gen68360.cfg for an + * example of how to do this. If gcc ever distinguishes between these + * two cores, then RTEMS__mcpu32p__ usage will be replaced with the + * appropriate compiler defined predefine. + * * Here is some information on the 040 variants (courtesy of Doug McBride, * mcbride@rodin.colorado.edu): * @@ -129,27 +139,28 @@ extern "C" { #define M68K_HAS_FPU 0 #define M68K_HAS_FPSP_PACKAGE 0 -#elif defined(__mc68332__) + /* gcc and egcs do not distinguish between CPU32 and CPU32+ */ +#elif defined(RTEMS__mcpu32p__) -#define CPU_MODEL_NAME "mcpu32" +#define CPU_MODEL_NAME "mcpu32+" #define M68K_HAS_VBR 1 #define M68K_HAS_SEPARATE_STACKS 0 #define M68K_HAS_BFFFO 0 #define M68K_HAS_PREINDEXING 1 #define M68K_HAS_EXTB_L 1 -#define M68K_HAS_MISALIGNED 0 +#define M68K_HAS_MISALIGNED 1 #define M68K_HAS_FPU 0 #define M68K_HAS_FPSP_PACKAGE 0 #elif defined(__mcpu32__) -#define CPU_MODEL_NAME "mcpu32+" +#define CPU_MODEL_NAME "mcpu32" #define M68K_HAS_VBR 1 #define M68K_HAS_SEPARATE_STACKS 0 #define M68K_HAS_BFFFO 0 #define M68K_HAS_PREINDEXING 1 #define M68K_HAS_EXTB_L 1 -#define M68K_HAS_MISALIGNED 1 +#define M68K_HAS_MISALIGNED 0 #define M68K_HAS_FPU 0 #define M68K_HAS_FPSP_PACKAGE 0 |