[PATCH 6/6] powerpc sstep: Add modsd, modud instruction emulation
From: Sandipan Das <hidden>
Date: 2018-09-03 15:20:04
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
This adds emulation support for the following integer instructions: * Modulo Signed Doubleword (modsd) * Modulo Unsigned Doubleword (modud) Signed-off-by: Sandipan Das <redacted> --- 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