Fix a commit 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in
delay slots") regression and remove assembly errors:
arch/mips/dec/int-handler.S: Assembler messages:
arch/mips/dec/int-handler.S:162: Error: Macro used $at after ".set noat"
arch/mips/dec/int-handler.S:163: Error: Macro used $at after ".set noat"
arch/mips/dec/int-handler.S:229: Error: Macro used $at after ".set noat"
arch/mips/dec/int-handler.S:230: Error: Macro used $at after ".set noat"
triggering with with the CPU_DADDI_WORKAROUNDS option set and the DADDIU
instruction. This is because with that option in place the instruction
becomes a macro, which expands to an LI/DADDU (or actually ADDIU/DADDU)
sequence that uses $at as a temporary register. Use ADDIU instead then,
which is equivalent when used with LUI to compose the intermediate
32-bit values.
Cc: stable@xxxxxxxxxxxxxxx # 4.8+
Fixes: 3021773c7c3e ("MIPS: DEC: Avoid la pseudo-instruction in delay slots")
Signed-off-by: Maciej W. Rozycki <macro@xxxxxxxxxxxxxx>
---
arch/mips/dec/int-handler.S | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
linux-mips-dec-int-handler-dla.diff
Index: linux-sfr-4maxp64/arch/mips/dec/int-handler.S
===================================================================
--- linux-sfr-4maxp64.orig/arch/mips/dec/int-handler.S
+++ linux-sfr-4maxp64/arch/mips/dec/int-handler.S
@@ -159,8 +159,8 @@
.set noat
lui t1, %highest(cpu_mask_nr_tbl)
lui AT, %hi(cpu_mask_nr_tbl)
- daddiu t1, t1, %higher(cpu_mask_nr_tbl)
- daddiu AT, AT, %lo(cpu_mask_nr_tbl)
+ addiu t1, t1, %higher(cpu_mask_nr_tbl)
+ addiu AT, AT, %lo(cpu_mask_nr_tbl)
dsll t1, 32
daddu t1, t1, AT
.set pop
@@ -226,8 +226,8 @@
.set noat
lui t1, %highest(asic_mask_nr_tbl)
lui AT, %hi(asic_mask_nr_tbl)
- daddiu t1, t1, %higher(asic_mask_nr_tbl)
- daddiu AT, AT, %lo(asic_mask_nr_tbl)
+ addiu t1, t1, %higher(asic_mask_nr_tbl)
+ addiu AT, AT, %lo(asic_mask_nr_tbl)
dsll t1, 32
daddu t1, t1, AT
.set pop