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[Qemu-arm] [PATCH 05/42] target/arm: Explicitly enable VFP short-vectors

From: Peter Maydell
Subject: [Qemu-arm] [PATCH 05/42] target/arm: Explicitly enable VFP short-vectors for aarch32 -cpu max
Date: Thu, 6 Jun 2019 18:45:32 +0100

At the moment our -cpu max for AArch32 supports VFP short-vectors
because we always implement them, even for CPUs which should
not have them. The following commits are going to switch to
using the correct ID-register-check to enable or disable short
vector support, so we need to turn it on explicitly for -cpu max,
because Cortex-A15 doesn't implement it.

We don't enable this for the AArch64 -cpu max, because the v8A
architecture never supports short-vectors.

Signed-off-by: Peter Maydell <address@hidden>
 target/arm/cpu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 044c4dd738b..3f06f6d1a20 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -2022,6 +2022,10 @@ static void arm_max_initfn(Object *obj)
     } else {
+        /* old-style VFP short-vector support */
+        cpu->isar.mvfr0 = FIELD_DP32(cpu->isar.mvfr0, MVFR0, FPSHVEC, 1);
         /* We don't set these in system emulation mode for the moment,
          * since we don't correctly set (all of) the ID registers to

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