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Commit 6c180071 authored by PrasannaKumar Muralidharan's avatar PrasannaKumar Muralidharan Committed by Michael Ellerman
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powerpc sstep: Add support for modsw, moduw instructions 



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

Signed-off-by: default avatarPrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: default avatarSandipan Das <sandipan@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 3e751acb

arch/powerpc/lib/sstep.c

+14 −0
Original line number Diff line number Diff line
@@ -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