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[PATCH 11/21] target/sparc: Move cpu_put_fsr(env, 0) call to reset


From: Peter Maydell
Subject: [PATCH 11/21] target/sparc: Move cpu_put_fsr(env, 0) call to reset
Date: Fri, 25 Oct 2024 15:12:44 +0100

Currently we call cpu_put_fsr(0) in sparc_cpu_realizefn(), which
initializes various fields in the CPU struct:
 * fsr_cexc_ftt
 * fcc[]
 * fsr_qne
 * fsr
It also sets the rounding mode in env->fp_status.

This is largely pointless, because when we later reset the CPU
this will zero out all the fields up until the "end_reset_fields"
label, which includes all of these (but not fp_status!)

Move the cpu_put_fsr(env, 0) call to reset, because that expresses
the logical requirement: we want to reset FSR to 0 on every reset.
This isn't a behaviour change because the fields are all zero anyway.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/sparc/cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/sparc/cpu.c b/target/sparc/cpu.c
index 54cb269e0af..e7f4068a162 100644
--- a/target/sparc/cpu.c
+++ b/target/sparc/cpu.c
@@ -76,6 +76,7 @@ static void sparc_cpu_reset_hold(Object *obj, ResetType type)
     env->npc = env->pc + 4;
 #endif
     env->cache_control = 0;
+    cpu_put_fsr(env, 0);
 }
 
 #ifndef CONFIG_USER_ONLY
@@ -805,7 +806,6 @@ static void sparc_cpu_realizefn(DeviceState *dev, Error 
**errp)
     env->version |= env->def.maxtl << 8;
     env->version |= env->def.nwindows - 1;
 #endif
-    cpu_put_fsr(env, 0);
 
     cpu_exec_realizefn(cs, &local_err);
     if (local_err != NULL) {
-- 
2.34.1




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