[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 04/12] target-arm: allow modifying vfp fpexc en bit
From: |
Juha.Riihimaki |
Subject: |
[Qemu-devel] [PATCH 04/12] target-arm: allow modifying vfp fpexc en bit only |
Date: |
Wed, 21 Oct 2009 12:17:45 +0200 |
All other bits except for the EN in the VFP FPEXC register are defined
as subarchitecture specific and real functionality for any of the
other bits has not been implemented in QEMU. However, current code
allows modifying all bits in the VFP FPEXC register leading to
problems when guest code is writing 1's to the subarchitecture
specific bits and checking whether the bits stay up to verify the
existence of functionality which in fact does not exist in QEMU.
Signed-off-by: Juha Riihimäki <address@hidden>
---
diff --git a/target-arm/translate.c b/target-arm/translate.c
index d027572..07ee638 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -2788,6 +2788,9 @@ static int disas_vfp_insn(CPUState * env,
DisasContext *s, uint32_t insn)
case ARM_VFP_FPEXC:
if (IS_USER(s))
return 1;
+ /* TODO: VFP subarchitecture support.
+ * For now, keep the EN bit only */
+ tcg_gen_andi_i32(tmp, tmp, 1 << 30);
store_cpu_field(tmp, vfp.xregs[rn]);
gen_lookup_tb(s);
break;
translate.c.vfpfpexc.diff
Description: translate.c.vfpfpexc.diff
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Qemu-devel] [PATCH 04/12] target-arm: allow modifying vfp fpexc en bit only,
Juha.Riihimaki <=