[PATCH 6/6] powerpc sstep: Add modsd, modud instruction emulation

[Sandipan Das]

This adds emulation support for the following integer instructions:
  * Modulo Signed Doubleword (modsd)
  * Modulo Unsigned Doubleword (modud)

Signed-off-by: Sandipan Das <sandi...@linux.ibm.com>
---
 arch/powerpc/lib/sstep.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index ddc2de28e00a..b3b508d175fb 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -1704,7 +1704,13 @@ int analyse_instr(struct instruction_op *op, const 
struct pt_regs *regs,
                                (int) regs->gpr[rb];
 
                        goto arith_done;
-
+#ifdef __powerpc64__
+               case 265:       /* modud */
+                       if (!cpu_has_feature(CPU_FTR_ARCH_300))
+                               return -1;
+                       op->val = regs->gpr[ra] % regs->gpr[rb];
+                       goto compute_done;
+#endif
                case 266:       /* add */
                        op->val = regs->gpr[ra] + regs->gpr[rb];
                        goto arith_done;
@@ -1753,7 +1759,14 @@ int analyse_instr(struct instruction_op *op, const 
struct pt_regs *regs,
                        }
 
                        return -1;
-
+#ifdef __powerpc64__
+               case 777:       /* modsd */
+                       if (!cpu_has_feature(CPU_FTR_ARCH_300))
+                               return -1;
+                       op->val = (long int) regs->gpr[ra] %
+                               (long int) regs->gpr[rb];
+                       goto compute_done;
+#endif
                case 779:       /* modsw */
                        if (!cpu_has_feature(CPU_FTR_ARCH_300))
                                return -1;
-- 
2.14.4