sim: mips: rename "igen" generation mode to "single"

The naming in here has grown organically and is confusing to follow.
Originally there was only one set of rules for generating code from
the igen sources, so calling it "tmp-igen" and such made sense.  But
when other multigen modes were added ("m16" & "multi") which also
used igen, it's not clear what's common igen and what's specific to
this generation  mode.  So rename the set of rules from "igen" to
"single" so it's easier to follow.

4 files changed, 60 insertions, 60 deletions

diff --git a/sim/Makefile.in b/sim/Makefile.in
index 667b319..a1884d6 100644
--- a/sim/Makefile.in
+++ b/sim/Makefile.in
@@ -1114,12 +1114,12 @@ SIM_INLINE = @SIM_INLINE@
 SIM_MIPS_BITSIZE = @SIM_MIPS_BITSIZE@
 SIM_MIPS_FPU_BITSIZE = @SIM_MIPS_FPU_BITSIZE@
 SIM_MIPS_GEN = @SIM_MIPS_GEN@
-SIM_MIPS_IGEN_FLAGS = @SIM_MIPS_IGEN_FLAGS@
 SIM_MIPS_IGEN_ITABLE_FLAGS = @SIM_MIPS_IGEN_ITABLE_FLAGS@
 SIM_MIPS_M16_FLAGS = @SIM_MIPS_M16_FLAGS@
 SIM_MIPS_MULTI_IGEN_CONFIGS = @SIM_MIPS_MULTI_IGEN_CONFIGS@
 SIM_MIPS_MULTI_OBJ = @SIM_MIPS_MULTI_OBJ@
 SIM_MIPS_MULTI_SRC = @SIM_MIPS_MULTI_SRC@
+SIM_MIPS_SINGLE_FLAGS = @SIM_MIPS_SINGLE_FLAGS@
 SIM_MIPS_SUBTARGET = @SIM_MIPS_SUBTARGET@
 SIM_PRIMARY_TARGET = @SIM_PRIMARY_TARGET@
 SIM_RISCV_BITSIZE = @SIM_RISCV_BITSIZE@
diff --git a/sim/configure b/sim/configure
index 093142f..b9626ce 100755
--- a/sim/configure
+++ b/sim/configure
@@ -647,7 +647,7 @@ SIM_MIPS_MULTI_IGEN_CONFIGS
 SIM_MIPS_IGEN_ITABLE_FLAGS
 SIM_MIPS_GEN
 SIM_MIPS_M16_FLAGS
-SIM_MIPS_IGEN_FLAGS
+SIM_MIPS_SINGLE_FLAGS
 SIM_MIPS_FPU_BITSIZE
 SIM_MIPS_BITSIZE
 SIM_MIPS_SUBTARGET
@@ -16390,19 +16390,19 @@ esac
 $as_echo "$SIM_MIPS_FPU_BITSIZE" >&6; }
 
 
-SIM_MIPS_GEN=IGEN
-sim_mips_igen_machine="-M mipsIV"
+SIM_MIPS_GEN=SINGLE
+sim_mips_single_machine="-M mipsIV"
 sim_mips_m16_machine="-M mips16,mipsIII"
-sim_mips_igen_filter="32,64,f"
+sim_mips_single_filter="32,64,f"
 sim_mips_m16_filter="16"
 case ${target} in #(
   mips*tx39*) :
-        SIM_MIPS_GEN=IGEN
-    sim_mips_igen_filter="32,f"
-    sim_mips_igen_machine="-M r3900" ;; #(
+        SIM_MIPS_GEN=SINGLE
+    sim_mips_single_filter="32,f"
+    sim_mips_single_machine="-M r3900" ;; #(
   mips64vr41*) :
         SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M vr4100"
+    sim_mips_single_machine="-M vr4100"
     sim_mips_m16_machine="-M vr4100" ;; #(
   mips64*) :
         SIM_MIPS_GEN=MULTI
@@ -16429,36 +16429,36 @@ case ${target} in #(
       mips32r2:mips32r2,mips3d,mips16,mips16e,mdmx,dsp,dsp2,smartmips:32,f:mipsisa32r2"
     sim_mips_multi_default=mipsisa32r2 ;; #(
   mipsisa32r6*) :
-        SIM_MIPS_GEN=IGEN
-    sim_mips_igen_machine="-M mips32r6"
-    sim_mips_igen_filter="32,f" ;; #(
+        SIM_MIPS_GEN=SINGLE
+    sim_mips_single_machine="-M mips32r6"
+    sim_mips_single_filter="32,f" ;; #(
   mipsisa32*) :
         SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M mips32,mips16,mips16e,smartmips"
+    sim_mips_single_machine="-M mips32,mips16,mips16e,smartmips"
     sim_mips_m16_machine="-M mips16,mips16e,mips32"
-    sim_mips_igen_filter="32,f" ;; #(
+    sim_mips_single_filter="32,f" ;; #(
   mipsisa64r2*) :
         SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M mips64r2,mips3d,mips16,mips16e,mdmx,dsp,dsp2"
+    sim_mips_single_machine="-M mips64r2,mips3d,mips16,mips16e,mdmx,dsp,dsp2"
     sim_mips_m16_machine="-M mips16,mips16e,mips64r2" ;; #(
   mipsisa64r6*) :
-        SIM_MIPS_GEN=IGEN
-    sim_mips_igen_machine="-M mips64r6" ;; #(
+        SIM_MIPS_GEN=SINGLE
+    sim_mips_single_machine="-M mips64r6" ;; #(
   mipsisa64sb1*) :
-        SIM_MIPS_GEN=IGEN
-    sim_mips_igen_machine="-M mips64,mips3d,sb1" ;; #(
+        SIM_MIPS_GEN=SINGLE
+    sim_mips_single_machine="-M mips64,mips3d,sb1" ;; #(
   mipsisa64*) :
         SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M mips64,mips3d,mips16,mips16e,mdmx"
+    sim_mips_single_machine="-M mips64,mips3d,mips16,mips16e,mdmx"
     sim_mips_m16_machine="-M mips16,mips16e,mips64" ;; #(
   mips*lsi*) :
         SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M mipsIII,mips16"
+    sim_mips_single_machine="-M mipsIII,mips16"
     sim_mips_m16_machine="-M mips16,mipsIII"
-    sim_mips_igen_filter="32,f" ;; #(
+    sim_mips_single_filter="32,f" ;; #(
   mips*) :
-        SIM_MIPS_GEN=IGEN
-    sim_mips_igen_filter="32,f" ;; #(
+        SIM_MIPS_GEN=SINGLE
+    sim_mips_single_filter="32,f" ;; #(
   *) :
      ;;
 esac
@@ -16601,13 +16601,13 @@ __EOF__
 
 else
       SIM_MIPS_MULTI_SRC=doesnt-exist.c
-  SIM_MIPS_IGEN_ITABLE_FLAGS='$(SIM_MIPS_IGEN_FLAGS)'
+  SIM_MIPS_IGEN_ITABLE_FLAGS='$(SIM_MIPS_SINGLE_FLAGS)'
   if test "x$SIM_MIPS_GEN" = x"M16"; then :
   as_fn_append SIM_MIPS_IGEN_ITABLE_FLAGS ' $(SIM_MIPS_M16_FLAGS)'
 fi
 
 fi
-SIM_MIPS_IGEN_FLAGS="-F ${sim_mips_igen_filter} ${sim_mips_igen_machine}"
+SIM_MIPS_SINGLE_FLAGS="-F ${sim_mips_single_filter} ${sim_mips_single_machine}"
 SIM_MIPS_M16_FLAGS="-F ${sim_mips_m16_filter} ${sim_mips_m16_machine}"
 
 
diff --git a/sim/mips/Makefile.in b/sim/mips/Makefile.in
index 187f574..d9b4898 100644
--- a/sim/mips/Makefile.in
+++ b/sim/mips/Makefile.in
@@ -3,7 +3,7 @@
 
 ## COMMON_PRE_CONFIG_FRAG
 
-SIM_MIPS_IGEN_FLAGS = @SIM_MIPS_IGEN_FLAGS@
+SIM_MIPS_SINGLE_FLAGS = @SIM_MIPS_SINGLE_FLAGS@
 SIM_MIPS_M16_FLAGS = @SIM_MIPS_M16_FLAGS@
 SIM_MIPS_GEN = @SIM_MIPS_GEN@
 SIM_MIPS_MULTI_IGEN_CONFIGS = @SIM_MIPS_MULTI_IGEN_CONFIGS@
@@ -15,7 +15,7 @@ arch = mips
 # Object files created by various simulator generators.
 
 
-SIM_IGEN_OBJ = \
+SIM_SINGLE_OBJ = \
 	support.o \
 	itable.o \
 	semantics.o \
@@ -86,11 +86,11 @@ IGEN_INCLUDE=\
 	$(srcdir)/mips3264r2.igen \
 	$(srcdir)/mips3264r6.igen \
 
-SIM_IGEN_ALL = tmp-igen
+SIM_SINGLE_ALL = tmp-single
 SIM_M16_ALL = tmp-m16
 SIM_MULTI_ALL = tmp-multi
 
-BUILT_SRC_FROM_IGEN = \
+BUILT_SRC_FROM_SINGLE = \
 	icache.h \
 	icache.c \
 	idecode.h \
@@ -105,15 +105,15 @@ BUILT_SRC_FROM_IGEN = \
 	engine.c \
 	irun.c \
 
-$(BUILT_SRC_FROM_IGEN): tmp-igen
+$(BUILT_SRC_FROM_SINGLE): tmp-single
 
-tmp-igen: $(IGEN_INSN) $(IGEN_DC) $(IGEN) $(IGEN_INCLUDE)
+tmp-single: $(IGEN_INSN) $(IGEN_DC) $(IGEN) $(IGEN_INCLUDE)
 	$(ECHO_IGEN) $(IGEN_RUN) \
 		$(IGEN_TRACE) \
 		-I $(srcdir) \
 		-Werror \
 		-Wnodiscard \
-		$(SIM_MIPS_IGEN_FLAGS) \
+		$(SIM_MIPS_SINGLE_FLAGS) \
 		-G gen-direct-access \
 		-G gen-zero-r0 \
 		-B 32 \
@@ -192,7 +192,7 @@ tmp-m16: $(IGEN_INSN) $(IGEN_DC) $(IGEN) $(IGEN_INCLUDE)
 		-I $(srcdir) \
 		-Werror \
 		-Wnodiscard \
-		$(SIM_MIPS_IGEN_FLAGS) \
+		$(SIM_MIPS_SINGLE_FLAGS) \
 		-G gen-direct-access \
 		-G gen-zero-r0 \
 		-B 32 \
@@ -303,7 +303,7 @@ tmp-run-multi: $(srcdir)/m16run.c $(srcdir)/micromipsrun.c
 	$(SILENCE) touch $@
 
 clean-extra:
-	rm -f $(BUILT_SRC_FROM_IGEN)
+	rm -f $(BUILT_SRC_FROM_SINGLE)
 	rm -f $(BUILT_SRC_FROM_M16)
 	rm -f $(BUILT_SRC_FROM_MULTI)
 	rm -f tmp-*
diff --git a/sim/mips/acinclude.m4 b/sim/mips/acinclude.m4
index 452dfc8..111dd87 100644
--- a/sim/mips/acinclude.m4
+++ b/sim/mips/acinclude.m4
@@ -59,19 +59,19 @@ AC_MSG_RESULT([$SIM_MIPS_FPU_BITSIZE])
 AC_SUBST(SIM_MIPS_FPU_BITSIZE)
 
 dnl Select the IGEN architecture.
-SIM_MIPS_GEN=IGEN
-sim_mips_igen_machine="-M mipsIV"
+SIM_MIPS_GEN=SINGLE
+sim_mips_single_machine="-M mipsIV"
 sim_mips_m16_machine="-M mips16,mipsIII"
-sim_mips_igen_filter="32,64,f"
+sim_mips_single_filter="32,64,f"
 sim_mips_m16_filter="16"
 AS_CASE([${target}],
   [mips*tx39*], [dnl
-    SIM_MIPS_GEN=IGEN
-    sim_mips_igen_filter="32,f"
-    sim_mips_igen_machine="-M r3900"],
+    SIM_MIPS_GEN=SINGLE
+    sim_mips_single_filter="32,f"
+    sim_mips_single_machine="-M r3900"],
   [mips64vr41*], [dnl
     SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M vr4100"
+    sim_mips_single_machine="-M vr4100"
     sim_mips_m16_machine="-M vr4100"],
   [mips64*], [dnl
     SIM_MIPS_GEN=MULTI
@@ -98,36 +98,36 @@ AS_CASE([${target}],
       mips32r2:mips32r2,mips3d,mips16,mips16e,mdmx,dsp,dsp2,smartmips:32,f:mipsisa32r2"
     sim_mips_multi_default=mipsisa32r2],
   [mipsisa32r6*], [dnl
-    SIM_MIPS_GEN=IGEN
-    sim_mips_igen_machine="-M mips32r6"
-    sim_mips_igen_filter="32,f"],
+    SIM_MIPS_GEN=SINGLE
+    sim_mips_single_machine="-M mips32r6"
+    sim_mips_single_filter="32,f"],
   [mipsisa32*], [dnl
     SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M mips32,mips16,mips16e,smartmips"
+    sim_mips_single_machine="-M mips32,mips16,mips16e,smartmips"
     sim_mips_m16_machine="-M mips16,mips16e,mips32"
-    sim_mips_igen_filter="32,f"],
+    sim_mips_single_filter="32,f"],
   [mipsisa64r2*], [dnl
     SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M mips64r2,mips3d,mips16,mips16e,mdmx,dsp,dsp2"
+    sim_mips_single_machine="-M mips64r2,mips3d,mips16,mips16e,mdmx,dsp,dsp2"
     sim_mips_m16_machine="-M mips16,mips16e,mips64r2"],
   [mipsisa64r6*], [dnl
-    SIM_MIPS_GEN=IGEN
-    sim_mips_igen_machine="-M mips64r6"],
+    SIM_MIPS_GEN=SINGLE
+    sim_mips_single_machine="-M mips64r6"],
   [mipsisa64sb1*], [dnl
-    SIM_MIPS_GEN=IGEN
-    sim_mips_igen_machine="-M mips64,mips3d,sb1"],
+    SIM_MIPS_GEN=SINGLE
+    sim_mips_single_machine="-M mips64,mips3d,sb1"],
   [mipsisa64*], [dnl
     SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M mips64,mips3d,mips16,mips16e,mdmx"
+    sim_mips_single_machine="-M mips64,mips3d,mips16,mips16e,mdmx"
     sim_mips_m16_machine="-M mips16,mips16e,mips64"],
   [mips*lsi*], [dnl
     SIM_MIPS_GEN=M16
-    sim_mips_igen_machine="-M mipsIII,mips16"
+    sim_mips_single_machine="-M mipsIII,mips16"
     sim_mips_m16_machine="-M mips16,mipsIII"
-    sim_mips_igen_filter="32,f"],
+    sim_mips_single_filter="32,f"],
   [mips*], [dnl
-    SIM_MIPS_GEN=IGEN
-    sim_mips_igen_filter="32,f"])
+    SIM_MIPS_GEN=SINGLE
+    sim_mips_single_filter="32,f"])
 
 dnl The MULTI generator can combine several simulation engines into one.
 dnl executable.  A configuration which uses the MULTI should set two
@@ -321,12 +321,12 @@ __EOF__
 ], [dnl
   dnl For clean-extra target.
   SIM_MIPS_MULTI_SRC=doesnt-exist.c
-  SIM_MIPS_IGEN_ITABLE_FLAGS='$(SIM_MIPS_IGEN_FLAGS)'
+  SIM_MIPS_IGEN_ITABLE_FLAGS='$(SIM_MIPS_SINGLE_FLAGS)'
   AS_VAR_IF([SIM_MIPS_GEN], ["M16"], [AS_VAR_APPEND([SIM_MIPS_IGEN_ITABLE_FLAGS], [' $(SIM_MIPS_M16_FLAGS)'])])
 ])
-SIM_MIPS_IGEN_FLAGS="-F ${sim_mips_igen_filter} ${sim_mips_igen_machine}"
+SIM_MIPS_SINGLE_FLAGS="-F ${sim_mips_single_filter} ${sim_mips_single_machine}"
 SIM_MIPS_M16_FLAGS="-F ${sim_mips_m16_filter} ${sim_mips_m16_machine}"
-AC_SUBST(SIM_MIPS_IGEN_FLAGS)
+AC_SUBST(SIM_MIPS_SINGLE_FLAGS)
 AC_SUBST(SIM_MIPS_M16_FLAGS)
 AC_SUBST(SIM_MIPS_GEN)
 AC_SUBST(SIM_MIPS_IGEN_ITABLE_FLAGS)