diff mbox series

[v2,5/6] powerpc sstep: Add support for modsw, moduw instructions

Message ID d7eabfc771a483889cac7acf15ccec14bfa3535a.1550817743.git.sandipan@linux.ibm.com (mailing list archive)
State Accepted
Commit 6c180071509aacb5989993b435e71e70500b72dd
Headers show
Series powerpc: sstep: Extend instruction emulation support | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch success next/apply_patch Successfully applied
snowpatch_ozlabs/checkpatch warning total: 0 errors, 0 warnings, 4 checks, 26 lines checked

Commit Message

Sandipan Das Feb. 22, 2019, 6:53 a.m. UTC 
From: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>

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>
---
 arch/powerpc/lib/sstep.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
diff mbox series

Patch

diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index 742298bdf30b..9c65fb1da298 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];
@@ -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