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| author | Balamuruhan S <bala24@linux.ibm.com> | 2020-07-28 18:33:07 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-29 23:47:52 +1000 |
| commit | 151c32bf5ebdd41114267717dc4b53d2632cbd30 (patch) | |
| tree | d3def3e7d10273db5b4c0af2fea83d5e2885755f /arch/powerpc | |
| parent | 8902c6f96364d1117236948d6c7b9178f428529c (diff) | |
| download | linux-151c32bf5ebdd41114267717dc4b53d2632cbd30.tar.gz | |
powerpc/sstep: Add support for divde[.] and divdeu[.] instructions
This patch adds emulation support for divde, divdeu instructions, - Divide Doubleword Extended (divde[.]) - Divide Doubleword Extended Unsigned (divdeu[.]) Signed-off-by: Balamuruhan S <bala24@linux.ibm.com> Reviewed-by: Sandipan Das <sandipan@linux.ibm.com> Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200728130308.1790982-3-bala24@linux.ibm.com
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/lib/sstep.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index c58ea9e787cb..caee8cc77e19 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -1806,7 +1806,18 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, op->val = (int) regs->gpr[ra] / (int) regs->gpr[rb]; goto arith_done; - +#ifdef __powerpc64__ + case 425: /* divde[.] */ + asm volatile(PPC_DIVDE(%0, %1, %2) : + "=r" (op->val) : "r" (regs->gpr[ra]), + "r" (regs->gpr[rb])); + goto arith_done; + case 393: /* divdeu[.] */ + asm volatile(PPC_DIVDEU(%0, %1, %2) : + "=r" (op->val) : "r" (regs->gpr[ra]), + "r" (regs->gpr[rb])); + goto arith_done; +#endif case 755: /* darn */ if (!cpu_has_feature(CPU_FTR_ARCH_300)) return -1; |