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target/arm/tcg: Don't build AArch64 decodetree files for qemu-system-arm 

Currently we list all the Arm decodetree files together and add them
unconditionally to arm_ss.  This means we build them for both
qemu-system-aarch64 and qemu-system-arm.  However, some of them are
AArch64-specific, so there is no need to build them for
qemu-system-arm.  (Meson is smart enough to notice that the generated
.c.inc file is not used by any objects that go into qemu-system-arm,
so we only unnecessarily run decodetree, not anything more
heavyweight like a recompile or relink, but it's still unnecessary
work.)

Split gen into gen_a32 and gen_a64, and only add gen_a64 for
TARGET_AARCH64 compiles.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230718104628.1137734-1-peter.maydell@linaro.org
master
Peter Maydell 2023-07-18 11:46:28 +01:00
parent 2b0d656ab6
commit 71054f72f1
1 changed files with 7 additions and 3 deletions
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10
target/arm/tcg/meson.build
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@ -1,7 +1,11 @@
gen = [
gen_a64 = [
decodetree.process('a64.decode', extra_args: ['--static-decode=disas_a64']),
decodetree.process('sve.decode', extra_args: '--decode=disas_sve'),
decodetree.process('sme.decode', extra_args: '--decode=disas_sme'),
decodetree.process('sme-fa64.decode', extra_args: '--static-decode=disas_sme_fa64'),
]
gen_a32 = [
decodetree.process('neon-shared.decode', extra_args: '--decode=disas_neon_shared'),
decodetree.process('neon-dp.decode', extra_args: '--decode=disas_neon_dp'),
decodetree.process('neon-ls.decode', extra_args: '--decode=disas_neon_ls'),
@ -13,10 +17,10 @@ gen = [
decodetree.process('a32-uncond.decode', extra_args: '--static-decode=disas_a32_uncond'),
decodetree.process('t32.decode', extra_args: '--static-decode=disas_t32'),
decodetree.process('t16.decode', extra_args: ['-w', '16', '--static-decode=disas_t16']),
decodetree.process('a64.decode', extra_args: ['--static-decode=disas_a64']),
]
arm_ss.add(gen)
arm_ss.add(gen_a32)
arm_ss.add(when: 'TARGET_AARCH64', if_true: gen_a64)
arm_ss.add(files(
'cpu32.c',