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target/arm: report ARMv8-A FP support for AArch32 -cpu max 

When we converted to using feature bits in 602f6e42cf we missed out
the fact (dp && arm_dc_feature(s, ARM_FEATURE_V8)) was supported for
-cpu max configurations. This caused a regression in the GCC test
suite. Fix this by setting the appropriate bits in mvfr1.FPHP to
report ARMv8-A with FP support (but not ARMv8.2-FP16).

Fixes: https://bugs.launchpad.net/qemu/+bug/1836078
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190711103737.10017-1-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
master
Alex Bennée 2019-07-15 14:17:02 +01:00 committed by Peter Maydell
parent b9404bf592
commit 45b1a243b8
1 changed files with 4 additions and 0 deletions
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4
target/arm/cpu.c
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@ -2452,6 +2452,10 @@ static void arm_max_initfn(Object *obj)
t = FIELD_DP32(t, ID_ISAR6, SPECRES, 1);
cpu->isar.id_isar6 = t;
t = cpu->isar.mvfr1;
t = FIELD_DP32(t, MVFR1, FPHP, 2); /* v8.0 FP support */
cpu->isar.mvfr1 = t;
t = cpu->isar.mvfr2;
t = FIELD_DP32(t, MVFR2, SIMDMISC, 3); /* SIMD MaxNum */
t = FIELD_DP32(t, MVFR2, FPMISC, 4); /* FP MaxNum */