Christophe Leroy 19daf0aef8 powerpc/bpf/32: perform three operands ALU operations ... When an ALU instruction is preceded by a MOV instruction that just moves a source register into the destination register of the ALU, replace that MOV+ALU instructions by an ALU operation taking the source of the MOV as second source instead of using its destination. Before the change, code could look like the following, with superfluous separate register move (mr) instructions. 70: 7f c6 f3 78 mr r6,r30 74: 7f a5 eb 78 mr r5,r29 78: 30 c6 ff f4 addic r6,r6,-12 7c: 7c a5 01 d4 addme r5,r5 With this commit, addition instructions take r30 and r29 directly. 70: 30 de ff f4 addic r6,r30,-12 74: 7c bd 01 d4 addme r5,r29 Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/b6719beaf01f9dcbcdbb787ef67c4a2f8e3a4cb6.1675245773.git.christophe.leroy@csgroup.eu		2023-02-10 22:17:35 +11:00
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bpf_jit_comp32.c	powerpc/bpf/32: perform three operands ALU operations	2023-02-10 22:17:35 +11:00
bpf_jit_comp64.c	powerpc/bpf: Only pad length-variable code at initial pass	2023-02-10 22:17:35 +11:00
bpf_jit_comp.c	powerpc/bpf: Perform complete extra passes to update addresses	2023-02-10 22:17:35 +11:00
bpf_jit.h	powerpc/bpf: Perform complete extra passes to update addresses	2023-02-10 22:17:35 +11:00
Makefile	powerpc/bpf: Implement extended BPF on PPC32	2021-04-03 21:22:21 +11:00