From 43615c60e7d493d7a9656268dab552eb2246f99f Mon Sep 17 00:00:00 2001
From: Andrew Waterman <waterman@eecs.berkeley.edu>
Date: Mon, 7 Jul 2014 15:17:16 -0700
Subject: [PATCH] Use precompiled headers to speed up compilation

---
 .gitignore                        |  1 +
 Makefile.in                       |  8 ++++++--
 hwacha/decode_hwacha.h            |  1 +
 hwacha/hwacha.mk.in               |  6 ++++++
 hwacha/insn_template_hwacha.cc    | 10 +---------
 hwacha/insn_template_hwacha.h     |  5 +++++
 hwacha/insn_template_hwacha_ut.cc | 11 +----------
 hwacha/insn_template_hwacha_ut.h  |  6 ++++++
 riscv/insn_template.cc            |  8 +-------
 riscv/insn_template.h             |  5 +++++
 riscv/riscv.mk.in                 |  4 ++++
 11 files changed, 37 insertions(+), 28 deletions(-)
 create mode 100644 hwacha/insn_template_hwacha.h
 create mode 100644 hwacha/insn_template_hwacha_ut.h
 create mode 100644 riscv/insn_template.h

diff --git a/.gitignore b/.gitignore
index 031e691..7503c9a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 build/
+*.gch
 autom4te.cache/
 .*.swp
diff --git a/Makefile.in b/Makefile.in
index 1f3074d..45d22a4 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -184,16 +184,20 @@ _$(1).cc :
 
 # Build the object files for this subproject
 
+$(2)_pch := $$(patsubst %.h, %.h.gch, $$($(2)_precompiled_hdrs))
 $(2)_objs := $$(patsubst %.cc, %.o, $$($(2)_srcs))
 $(2)_c_objs := $$(patsubst %.c, %.o, $$($(2)_c_srcs))
 $(2)_deps := $$(patsubst %.o, %.d, $$($(2)_objs))
 $(2)_c_deps := $$(patsubst %.o, %.d, $$($(2)_c_objs))
-$$($(2)_objs) : %.o : %.cc $$($(2)_gen_hdrs)
+$$($(2)_pch) : %.h.gch : %.h
+	$(COMPILE) $$<
+$$($(2)_objs) : %.o : %.cc $$($(2)_gen_hdrs) $$($(2)_pch)
 	$(COMPILE) -c $$<
 $$($(2)_c_objs) : %.o : %.c $$($(2)_gen_hdrs)
 	$(COMPILE_C) -c $$<
 
-$(2)_junk += $$($(2)_objs) $$($(2)_c_objs) $$($(2)_deps) $$($(2)_c_deps) $$($(2)_gen_hdrs)
+$(2)_junk += $$(addprefix $(src_dir)/$(1)/, $$($(2)_pch)) \
+  $$($(2)_objs) $$($(2)_c_objs) $$($(2)_deps) $$($(2)_c_deps) $$($(2)_gen_hdrs)
 
 # Reverse the dependency list so that a given subproject only depends on
 # subprojects listed to its right. This is the correct order for linking
diff --git a/hwacha/decode_hwacha.h b/hwacha/decode_hwacha.h
index 74e1326..7a6c8ee 100644
--- a/hwacha/decode_hwacha.h
+++ b/hwacha/decode_hwacha.h
@@ -3,6 +3,7 @@
 
 #include "hwacha.h"
 #include "hwacha_xcpt.h"
+#include "mmu.h"
 
 #define XS1 (xs1)
 #define XS2 (xs2)
diff --git a/hwacha/hwacha.mk.in b/hwacha/hwacha.mk.in
index 1be2774..b4f375e 100644
--- a/hwacha/hwacha.mk.in
+++ b/hwacha/hwacha.mk.in
@@ -11,6 +11,12 @@ hwacha_hdrs = \
 	decode_hwacha_ut.h \
 	opcodes_hwacha.h \
 	opcodes_hwacha_ut.h \
+	insn_template_hwacha.h \
+	insn_template_hwacha_ut.h \
+
+hwacha_precompiled_hdrs = \
+	insn_template_hwacha.h \
+	insn_template_hwacha_ut.h \
 
 hwacha_srcs = \
 	hwacha.cc \
diff --git a/hwacha/insn_template_hwacha.cc b/hwacha/insn_template_hwacha.cc
index e6f94d4..cb44cac 100644
--- a/hwacha/insn_template_hwacha.cc
+++ b/hwacha/insn_template_hwacha.cc
@@ -1,13 +1,5 @@
 // See LICENSE for license details.
-
-#include "config.h"
-#include "processor.h"
-#include "mmu.h"
-#include "hwacha.h"
-#include "decode_hwacha.h"
-#include "encodings_hwacha.h"
-#include "rocc.h"
-#include <assert.h>
+#include "insn_template_hwacha.h"
 
 reg_t hwacha_NAME(processor_t* p, insn_t insn, reg_t pc)
 {
diff --git a/hwacha/insn_template_hwacha.h b/hwacha/insn_template_hwacha.h
new file mode 100644
index 0000000..b4704da
--- /dev/null
+++ b/hwacha/insn_template_hwacha.h
@@ -0,0 +1,5 @@
+#include "hwacha.h"
+#include "decode_hwacha.h"
+#include "encodings_hwacha.h"
+#include "rocc.h"
+#include <assert.h>
diff --git a/hwacha/insn_template_hwacha_ut.cc b/hwacha/insn_template_hwacha_ut.cc
index 79e7c2f..d312e93 100644
--- a/hwacha/insn_template_hwacha_ut.cc
+++ b/hwacha/insn_template_hwacha_ut.cc
@@ -1,14 +1,5 @@
 // See LICENSE for license details.
-
-#include "config.h"
-#include "processor.h"
-#include "mmu.h"
-#include "softfloat.h"
-#include "platform.h" // softfloat isNaNF32UI, etc.
-#include "internals.h" // ditto
-#include "hwacha.h"
-#include "decode_hwacha_ut.h"
-#include <assert.h>
+#include "insn_template_hwacha_ut.h"
 
 reg_t hwacha_NAME(processor_t* p, insn_t insn, reg_t pc)
 {
diff --git a/hwacha/insn_template_hwacha_ut.h b/hwacha/insn_template_hwacha_ut.h
new file mode 100644
index 0000000..a26e528
--- /dev/null
+++ b/hwacha/insn_template_hwacha_ut.h
@@ -0,0 +1,6 @@
+#include "hwacha.h"
+#include "decode_hwacha_ut.h"
+#include "softfloat.h"
+#include "platform.h" // softfloat isNaNF32UI, etc.
+#include "internals.h" // ditto
+#include <assert.h>
diff --git a/riscv/insn_template.cc b/riscv/insn_template.cc
index a901077..d2c0fce 100644
--- a/riscv/insn_template.cc
+++ b/riscv/insn_template.cc
@@ -1,12 +1,6 @@
 // See LICENSE for license details.
 
-#include "processor.h"
-#include "config.h"
-#include "mmu.h"
-#include "softfloat.h"
-#include "platform.h" // softfloat isNaNF32UI, etc.
-#include "internals.h" // ditto
-#include <assert.h>
+#include "insn_template.h"
 
 reg_t rv32_NAME(processor_t* p, insn_t insn, reg_t pc)
 {
diff --git a/riscv/insn_template.h b/riscv/insn_template.h
new file mode 100644
index 0000000..109b4c4
--- /dev/null
+++ b/riscv/insn_template.h
@@ -0,0 +1,5 @@
+#include "mmu.h"
+#include "softfloat.h"
+#include "platform.h" // softfloat isNaNF32UI, etc.
+#include "internals.h" // ditto
+#include <assert.h>
diff --git a/riscv/riscv.mk.in b/riscv/riscv.mk.in
index 84723bd..0fd5eaf 100644
--- a/riscv/riscv.mk.in
+++ b/riscv/riscv.mk.in
@@ -20,6 +20,10 @@ riscv_hdrs = \
 	extension.h \
 	rocc.h \
 	dummy-rocc.h \
+	insn_template.h \
+
+riscv_precompiled_hdrs = \
+	insn_template.h \
 
 riscv_srcs = \
 	htif.cc \
-- 
2.30.2