On 22/2/23 17:12, Jiaxun Yang wrote:
For R4000 erratas around multiplication and division instructions, as our use of those instructions are always followed by mflo/mfhi instructions, the only issue we need care is "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0" Errata 28: "A double-word or a variable shift may give an incorrect result if executed while an integer multiplication is in progress." We just emit a mfhi $0 to ensure the operation is completed after every multiplication instruction accorading to workaround suggestion
Typo "according"
in the document. Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> --- arch/mips/Kconfig | 4 +--- arch/mips/net/bpf_jit_comp32.c | 4 ++++ arch/mips/net/bpf_jit_comp64.c | 3 +++ 3 files changed, 8 insertions(+), 3 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
