powerpc/bpf/jit: Optimize 64-bit Immediate loads (b1a05787) · Commits · 戴 / test

Similar to the LI32() optimization, if the value can be represented in 32-bits, use LI32(). Also handle loading a few specific forms of immediate values in an optimum manner. Acked-by:

Alexei Starovoitov <ast@kernel.org> Signed-off-by:

Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by:

Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/net/bpf_jit.h

+11 −6

Original line number	Diff line number	Diff line
		@@ -244,20 +244,25 @@ DECLARE_LOAD_FUNC(sk_load_byte_msh);
		} } while(0)

		#define PPC_LI64(d, i) do { \
		if (!((uintptr_t)(i) & 0xffffffff00000000ULL)) \
		if ((long)(i) >= -2147483648 && \
		(long)(i) < 2147483648) \
		PPC_LI32(d, i); \
		else { \
		if (!((uintptr_t)(i) & 0xffff800000000000ULL)) \
		PPC_LI(d, ((uintptr_t)(i) >> 32) & 0xffff); \
		else { \
		PPC_LIS(d, ((uintptr_t)(i) >> 48)); \
		if ((uintptr_t)(i) & 0x0000ffff00000000ULL) \
		PPC_ORI(d, d, \
		((uintptr_t)(i) >> 32) & 0xffff); \
		} \
		PPC_SLDI(d, d, 32); \
		if ((uintptr_t)(i) & 0x00000000ffff0000ULL) \
		PPC_ORIS(d, d, \
		((uintptr_t)(i) >> 16) & 0xffff); \
		if ((uintptr_t)(i) & 0x000000000000ffffULL) \
		PPC_ORI(d, d, (uintptr_t)(i) & 0xffff); \
		} } while (0);
		} } while (0)

		#ifdef CONFIG_PPC64
		#define PPC_FUNC_ADDR(d,i) do { PPC_LI64(d, i); } while(0)

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