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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)
kvm_arm_set_cpu_features_from_host(cpu);
} else {
cortex_a15_initfn(obj);
+
+ /* old-style VFP short-vector support */
+ cpu->isar.mvfr0 = FIELD_DP32(cpu->isar.mvfr0, MVFR0, FPSHVEC, 1);
+
#ifdef CONFIG_USER_ONLY
/* We don't set these in system emulation mode for the moment,
* since we don't correctly set (all of) the ID registers to
--
2.20.1
- Re: [Qemu-arm] [PATCH 32/42] target/arm: Convert VMOV (register) to decodetree, (continued)
- [Qemu-arm] [PATCH 33/42] target/arm: Convert VFP comparison insns to decodetree, Peter Maydell, 2019/06/06
- [Qemu-arm] [PATCH 07/42] target/arm: Convert VMINNM, VMAXNM to decodetree, Peter Maydell, 2019/06/06
- [Qemu-arm] [PATCH 36/42] target/arm: Convert VFP round insns to decodetree, Peter Maydell, 2019/06/06
- [Qemu-arm] [PATCH 09/42] target/arm: Convert VCVTA/VCVTN/VCVTP/VCVTM to decodetree, Peter Maydell, 2019/06/06
- [Qemu-arm] [PATCH 05/42] target/arm: Explicitly enable VFP short-vectors for aarch32 -cpu max,
Peter Maydell <=
- [Qemu-arm] [PATCH 39/42] target/arm: Convert VJCVT to decodetree, Peter Maydell, 2019/06/06
- [Qemu-arm] [PATCH 22/42] target/arm: Convert VMUL to decodetree, Peter Maydell, 2019/06/06
- [Qemu-arm] [PATCH 08/42] target/arm: Convert VRINTA/VRINTN/VRINTP/VRINTM to decodetree, Peter Maydell, 2019/06/06
- [Qemu-arm] [PATCH 16/42] target/arm: Convert the VFP load/store multiple insns to decodetree, Peter Maydell, 2019/06/06
- [Qemu-arm] [PATCH 17/42] target/arm: Remove VLDR/VSTR/VLDM/VSTM use of cpu_F0s and cpu_F0d, Peter Maydell, 2019/06/06