[PATCH 5/6] powerpc sstep: Add modsw, moduw instruction emulation

[Sandipan Das]

From: PrasannaKumar Muralidharan <prasannatsmku...@gmail.com>

This adds emulation support for the following integer instructions:
  * Modulo Signed Word (modsw)
  * Modulo Unsigned Word (moduw)

Signed-off-by: PrasannaKumar Muralidharan <prasannatsmku...@gmail.com>
Signed-off-by: Sandipan Das <sandi...@linux.ibm.com>
---
 arch/powerpc/lib/sstep.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index 828677df47b2..ddc2de28e00a 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -1708,6 +1708,13 @@ int analyse_instr(struct instruction_op *op, const 
struct pt_regs *regs,
                case 266:       /* add */
                        op->val = regs->gpr[ra] + regs->gpr[rb];
                        goto arith_done;
+
+               case 267:       /* moduw */
+                       if (!cpu_has_feature(CPU_FTR_ARCH_300))
+                               return -1;
+                       op->val = (unsigned int) regs->gpr[ra] %
+                               (unsigned int) regs->gpr[rb];
+                       goto compute_done;
 #ifdef __powerpc64__
                case 457:       /* divdu */
                        op->val = regs->gpr[ra] / regs->gpr[rb];
@@ -1747,6 +1754,13 @@ int analyse_instr(struct instruction_op *op, const 
struct pt_regs *regs,
 
                        return -1;
 
+               case 779:       /* modsw */
+                       if (!cpu_has_feature(CPU_FTR_ARCH_300))
+                               return -1;
+                       op->val = (int) regs->gpr[ra] %
+                               (int) regs->gpr[rb];
+                       goto compute_done;
+
 
 /*
  * Logical instructions
-- 
2.14.4