From: Stafford Horne <shorne@gmail.com>
To: QEMU Development <qemu-devel@nongnu.org>
Cc: Linux OpenRISC <linux-openrisc@vger.kernel.org>,
Stafford Horne <shorne@gmail.com>
Subject: [PATCH 3/3] target/openrisc: Setup FPU for detecting tininess before rounding
Date: Tue, 2 May 2023 19:57:31 +0100 [thread overview]
Message-ID: <20230502185731.3543420-4-shorne@gmail.com> (raw)
In-Reply-To: <20230502185731.3543420-1-shorne@gmail.com>
OpenRISC defines tininess to be detected before rounding. Setup qemu to
obey this.
Signed-off-by: Stafford Horne <shorne@gmail.com>
---
target/openrisc/cpu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/target/openrisc/cpu.c b/target/openrisc/cpu.c
index 0ce4f796fa..cdbff26fb5 100644
--- a/target/openrisc/cpu.c
+++ b/target/openrisc/cpu.c
@@ -22,6 +22,7 @@
#include "qemu/qemu-print.h"
#include "cpu.h"
#include "exec/exec-all.h"
+#include "fpu/softfloat-helpers.h"
#include "tcg/tcg.h"
static void openrisc_cpu_set_pc(CPUState *cs, vaddr value)
@@ -90,6 +91,10 @@ static void openrisc_cpu_reset_hold(Object *obj)
s->exception_index = -1;
cpu_set_fpcsr(&cpu->env, 0);
+ set_default_nan_mode(1, &cpu->env.fp_status);
+ set_float_detect_tininess(float_tininess_before_rounding,
+ &cpu->env.fp_status);
+
#ifndef CONFIG_USER_ONLY
cpu->env.picmr = 0x00000000;
cpu->env.picsr = 0x00000000;
--
2.39.1
next prev parent reply other threads:[~2023-05-02 18:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-02 18:57 [PATCH 0/3] OpenRISC updates for user space FPU Stafford Horne
2023-05-02 18:57 ` [PATCH 1/3] target/openrisc: Allow fpcsr access in user mode Stafford Horne
2023-05-03 6:29 ` Stafford Horne
2023-05-02 18:57 ` [PATCH 2/3] target/openrisc: Set PC to cpu state on FPU exception Stafford Horne
2023-05-03 7:36 ` Richard Henderson
2023-05-03 9:12 ` Stafford Horne
2023-05-02 18:57 ` Stafford Horne [this message]
2023-05-03 7:37 ` [PATCH 3/3] target/openrisc: Setup FPU for detecting tininess before rounding Richard Henderson
2023-05-03 9:14 ` Stafford Horne
2023-05-03 9:41 ` Richard Henderson
2023-05-03 16:31 ` Stafford Horne
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