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[Qemu-devel] [PATCH] target-arm: When setting FPSCR.QC, don't clear othe

From: Peter Maydell
Subject: [Qemu-devel] [PATCH] target-arm: When setting FPSCR.QC, don't clear other FPSCR bits
Date: Tue, 8 May 2012 16:08:19 +0100

From: Matt Craighead <address@hidden>

This patch fixes a bug affecting a variety of Neon instructions, such as

Signed-off-by: Matt Craighead <address@hidden>
Signed-off-by: Peter Maydell <address@hidden>
 target-arm/neon_helper.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/target-arm/neon_helper.c b/target-arm/neon_helper.c
index 1e02d61..e0b9dbf 100644
--- a/target-arm/neon_helper.c
+++ b/target-arm/neon_helper.c
@@ -16,7 +16,7 @@
 #define SIGNBIT (uint32_t)0x80000000
 #define SIGNBIT64 ((uint64_t)1 << 63)
-#define SET_QC() env->vfp.xregs[ARM_VFP_FPSCR] = CPSR_Q
+#define SET_QC() env->vfp.xregs[ARM_VFP_FPSCR] |= CPSR_Q
 #define NEON_TYPE1(name, type) \
 typedef struct \

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