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target/arm: Introduce ARM_FEATURE_V8_ATOMICS and initial decode

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The insns in the ARMv8.1-Atomics are added to the existing
load/store exclusive and load/store reg opcode spaces.
Rearrange the top-level decoders for these to accomodate.
The Atomics insns themselves still generate Unallocated.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180508151437.4232-8-richard.henderson@linaro.org
[PMM: Drop the ARM_FEATURE_V8_1 feature flag]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2018-05-10 18:10:57 +01:00 • committed by Peter Maydell
parent 3e281df1e1
commit 68412d2ece
3 changed files with 138 additions and 46 deletions
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1
linux-user/elfload.c
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@ -581,6 +581,7 @@ static uint32_t get_elf_hwcap(void)
GET_FEATURE(ARM_FEATURE_V8_SHA512, ARM_HWCAP_A64_SHA512);
GET_FEATURE(ARM_FEATURE_V8_FP16,
ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
GET_FEATURE(ARM_FEATURE_V8_ATOMICS, ARM_HWCAP_A64_ATOMICS);
GET_FEATURE(ARM_FEATURE_V8_RDM, ARM_HWCAP_A64_ASIMDRDM);
GET_FEATURE(ARM_FEATURE_V8_FCMA, ARM_HWCAP_A64_FCMA);
#undef GET_FEATURE