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authorAndrew Cagney <cagney@redhat.com>1998-02-13 05:22:49 +0000
committerAndrew Cagney <cagney@redhat.com>1998-02-13 05:22:49 +0000
commitac9a7d8a2cf9ffc4dbd869db4283002402cf595e (patch)
treea6de094fb475c3616505fd820119df919797a699
parent93c6a010dc099f1ce3ec11872642d74822acd75f (diff)
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Implement separate user (SPU) and interrupt (SPI) stack pointers.
-rw-r--r--sim/d10v/ChangeLog8
-rw-r--r--sim/d10v/d10v_sim.h5
-rw-r--r--sim/d10v/simops.c2
3 files changed, 15 insertions, 0 deletions
diff --git a/sim/d10v/ChangeLog b/sim/d10v/ChangeLog
index 4294cd7..7c884fb 100644
--- a/sim/d10v/ChangeLog
+++ b/sim/d10v/ChangeLog
@@ -1,3 +1,11 @@
+Fri Feb 13 15:15:58 1998 Andrew Cagney <cagney@b1.cygnus.com>
+
+ * simops.c (move_to_cr): Sync regs[SP_IDX] with State.sp according
+ to PSW:SM.
+
+ * d10v_sim.h (struct _state): Add sp, as holding area for SPI/SPU.
+ (SP_IDX): Define.
+
Wed Feb 11 16:53:49 1998 Andrew Cagney <cagney@b1.cygnus.com>
* simops.c (OP_5F00): Call error instead of abort for unknown
diff --git a/sim/d10v/d10v_sim.h b/sim/d10v/d10v_sim.h
index df95426..665c529 100644
--- a/sim/d10v/d10v_sim.h
+++ b/sim/d10v/d10v_sim.h
@@ -75,10 +75,15 @@ enum _ins_type
extern unsigned long ins_type_counters[ (int)INS_MAX ];
+enum {
+ SP_IDX = 15,
+};
+
struct _state
{
reg_t regs[16]; /* general-purpose registers */
reg_t cregs[16]; /* control registers */
+ reg_t sp[2]; /* holding area for SPI(0)/SPU(1) */
int64 a[2]; /* accumulators */
uint8 SM;
uint8 EA;
diff --git a/sim/d10v/simops.c b/sim/d10v/simops.c
index 9263c42..ef34f94 100644
--- a/sim/d10v/simops.c
+++ b/sim/d10v/simops.c
@@ -50,6 +50,7 @@ move_to_cr (int cr, reg_t val)
switch (cr)
{
case PSW_CR:
+ State.sp[State.SM] = State.regs[SP_IDX]; /* save old SP */
State.SM = (val & PSW_SM_BIT) != 0;
State.EA = (val & PSW_EA_BIT) != 0;
State.DB = (val & PSW_DB_BIT) != 0;
@@ -62,6 +63,7 @@ move_to_cr (int cr, reg_t val)
State.F0 = (val & PSW_F0_BIT) != 0;
State.F1 = (val & PSW_F1_BIT) != 0;
State.C = (val & PSW_C_BIT) != 0;
+ State.regs[SP_IDX] = State.sp[State.SM]; /* restore new SP */
if (State.ST && !State.FX)
{
(*d10v_callback->printf_filtered)