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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2001-09-28 14:10:46 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2001-09-28 14:10:46 +0000 |
| commit | 388cf1286f9f4ef222d1b8a34618751b31f29809 (patch) | |
| tree | 55181eb0a8a025cc04c4b3d8fb9a16b2d68a201a | |
| parent | 2001-09-19 Ralf Corsepius <corsepiu@faw.uni-ulm.de> (diff) | |
| download | rtems-388cf1286f9f4ef222d1b8a34618751b31f29809.tar.bz2 | |
2001-09-27 Jiri Gaisler <jiri@gaisler.com>
* cpu_asm.S: Small patch to fix a bug in the rtems sparc port. The
bug has been there all the time, but only hits the leon bsp since the
leon cpu has a 5-stage pipeline (erc32 has 4 stages).
| -rw-r--r-- | c/src/exec/score/cpu/sparc/cpu_asm.S | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/c/src/exec/score/cpu/sparc/cpu_asm.S b/c/src/exec/score/cpu/sparc/cpu_asm.S index af7df160ef..fd62681605 100644 --- a/c/src/exec/score/cpu/sparc/cpu_asm.S +++ b/c/src/exec/score/cpu/sparc/cpu_asm.S @@ -52,8 +52,8 @@ SYM(_CPU_Context_save_fp): or %l1, %lo(SPARC_PSR_EF_MASK), %l1 or %l0, %l1, %l0 mov %l0, %psr ! **** ENABLE FLOAT ACCESS **** - - ld [%i0], %l0 + nop; nop; nop; ! Need three nops before EF is + ld [%i0], %l0 ! active due to pipeline delay!!! std %f0, [%l0 + FO_F1_OFFSET] std %f2, [%l0 + F2_F3_OFFSET] std %f4, [%l0 + F4_F5_OFFSET] @@ -101,8 +101,8 @@ SYM(_CPU_Context_restore_fp): or %l1, %lo(SPARC_PSR_EF_MASK), %l1 or %l0, %l1, %l0 mov %l0, %psr ! **** ENABLE FLOAT ACCESS **** - - ld [%i0], %l0 + nop; nop; nop; ! Need three nops before EF is + ld [%i0], %l0 ! active due to pipeline delay!!! ldd [%l0 + FO_F1_OFFSET], %f0 ldd [%l0 + F2_F3_OFFSET], %f2 ldd [%l0 + F4_F5_OFFSET], %f4 |