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powerpc sstep: Add support for modsd, modud instructions 

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

Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Sandipan Das 2019-02-22 12:23:32 +05:30 committed by Michael Ellerman
parent 6c18007150
commit 6324320de6
1 changed files with 15 additions and 2 deletions
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17
arch/powerpc/lib/sstep.c
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@ -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;
@ -1756,7 +1762,14 @@ 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;