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powerpc sstep: Add support for modsw, moduw instructions

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

Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
PrasannaKumar Muralidharan 2019-02-22 12:23:31 +05:30 committed by Michael Ellerman
parent 3e751acba2
commit 6c18007150
1 changed files with 14 additions and 0 deletions
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14
arch/powerpc/lib/sstep.c
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@ -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];
@ -1750,6 +1757,13 @@ 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