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powerpc sstep: Add support for extswsli instruction 

This adds emulation support for the following integer instructions:
  * Extend-Sign Word and Shift Left Immediate (extswsli[.])

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 12:23:30 +05:30 committed by Michael Ellerman
parent 32628b5cf3
commit 3e751acba2
1 changed files with 14 additions and 0 deletions
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14
arch/powerpc/lib/sstep.c
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@ -1935,6 +1935,20 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs,
op->xerval &= ~XER_CA;
set_ca32(op, op->xerval & XER_CA);
goto logical_done;
case 890: /* extswsli with sh_5 = 0 */
case 891: /* extswsli with sh_5 = 1 */
if (!cpu_has_feature(CPU_FTR_ARCH_300))
return -1;
op->type = COMPUTE + SETREG;
sh = rb | ((instr & 2) << 4);
val = (signed int) regs->gpr[rd];
if (sh)
op->val = ROTATE(val, sh) & MASK64(0, 63 - sh);
else
op->val = val;
goto logical_done;
#endif /* __powerpc64__ */
/*