[PATCH 5/6] powerpc sstep: Add modsw, moduw instruction emulation
From: Sandipan Das <hidden>
Date: 2018-09-03 15:20:02
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
From: PrasannaKumar Muralidharan <redacted> This adds emulation support for the following integer instructions: * Modulo Signed Word (modsw) * Modulo Unsigned Word (moduw) Signed-off-by: PrasannaKumar Muralidharan <redacted> Signed-off-by: Sandipan Das <redacted> --- 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