diff options
Diffstat (limited to 'cpukit/score/cpu/sparc/cpu_asm.S')
| -rw-r--r-- | cpukit/score/cpu/sparc/cpu_asm.S | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/cpukit/score/cpu/sparc/cpu_asm.S b/cpukit/score/cpu/sparc/cpu_asm.S index 92674de783..15f9dd26e1 100644 --- a/cpukit/score/cpu/sparc/cpu_asm.S +++ b/cpukit/score/cpu/sparc/cpu_asm.S @@ -55,7 +55,13 @@ SYM(_CPU_Context_save_fp): or %l1, %lo(SPARC_PSR_EF_MASK), %l1 or %l0, %l1, %l0 mov %l0, %psr ! **** ENABLE FLOAT ACCESS **** - nop; nop; nop; ! Need three nops before EF is + nop; nop; nop; ! Need three nops before EF is +#ifdef SPARC_DYNAMIC_FPU_DETECTION + mov %psr, %l0 ! **** check whether fpu present **** + andcc %l0,%l1,%g0 + beq 1f + nop +#endif ld [%i0], %l0 ! active due to pipeline delay!!! std %f0, [%l0 + FO_F1_OFFSET] std %f2, [%l0 + F2_F3_OFFSET] @@ -104,7 +110,13 @@ SYM(_CPU_Context_restore_fp): or %l1, %lo(SPARC_PSR_EF_MASK), %l1 or %l0, %l1, %l0 mov %l0, %psr ! **** ENABLE FLOAT ACCESS **** - nop; nop; nop; ! Need three nops before EF is + nop; nop; nop; ! Need three nops before EF is +#ifdef SPARC_DYNAMIC_FPU_DETECTION + mov %psr, %l0 ! **** check whether fpu present **** + andcc %l0,%l1,%g0 + beq 1f + nop +#endif ld [%i0], %l0 ! active due to pipeline delay!!! ldd [%l0 + FO_F1_OFFSET], %f0 ldd [%l0 + F2_F3_OFFSET], %f2 @@ -123,6 +135,7 @@ SYM(_CPU_Context_restore_fp): ldd [%l0 + F28_F29_OFFSET], %f28 ldd [%l0 + F3O_F31_OFFSET], %f30 ld [%l0 + FSR_OFFSET], %fsr +1: ret restore |