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arm64: introduce aarch64_insn_gen_data2()

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Introduce function to generate data-processing (2 source) instructions.

Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Zi Shen Lim
2014-08-27 05:15:27 +01:00
committed by Will Deacon
parent 546dd36b44
commit 6481063989
2 changed files with 68 additions and 0 deletions
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48
arch/arm64/kernel/insn.c
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@@ -784,3 +784,51 @@ u32 aarch64_insn_gen_data1(enum aarch64_insn_register dst,
return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
}
u32 aarch64_insn_gen_data2(enum aarch64_insn_register dst,
enum aarch64_insn_register src,
enum aarch64_insn_register reg,
enum aarch64_insn_variant variant,
enum aarch64_insn_data2_type type)
{
u32 insn;
switch (type) {
case AARCH64_INSN_DATA2_UDIV:
insn = aarch64_insn_get_udiv_value();
break;
case AARCH64_INSN_DATA2_SDIV:
insn = aarch64_insn_get_sdiv_value();
break;
case AARCH64_INSN_DATA2_LSLV:
insn = aarch64_insn_get_lslv_value();
break;
case AARCH64_INSN_DATA2_LSRV:
insn = aarch64_insn_get_lsrv_value();
break;
case AARCH64_INSN_DATA2_ASRV:
insn = aarch64_insn_get_asrv_value();
break;
case AARCH64_INSN_DATA2_RORV:
insn = aarch64_insn_get_rorv_value();
break;
default:
BUG_ON(1);
}
switch (variant) {
case AARCH64_INSN_VARIANT_32BIT:
break;
case AARCH64_INSN_VARIANT_64BIT:
insn |= AARCH64_INSN_SF_BIT;
break;
default:
BUG_ON(1);
}
insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, reg);
}