From 6059507910804b97709f16dee2bfc6b658a8cab9 Mon Sep 17 00:00:00 2001
From: gbeauche <>
Date: Tue, 20 Mar 2001 18:05:36 +0000
Subject: [PATCH] Moved FPU emulation code sources to uae_cpu/fpu/

---
 BasiliskII/src/Unix/configure.in              | 51 +++++++++++++++++++
 .../src/uae_cpu/{fpp.cpp => fpu/fpu_uae.cpp}  |  0
 BasiliskII/src/uae_cpu/{ => fpu}/fpu_x86.cpp  |  4 +-
 BasiliskII/src/uae_cpu/{ => fpu}/fpu_x86.h    |  0
 .../src/uae_cpu/{ => fpu}/fpu_x86_asm.h       |  0
 5 files changed, 53 insertions(+), 2 deletions(-)
 rename BasiliskII/src/uae_cpu/{fpp.cpp => fpu/fpu_uae.cpp} (100%)
 rename BasiliskII/src/uae_cpu/{ => fpu}/fpu_x86.cpp (99%)
 rename BasiliskII/src/uae_cpu/{ => fpu}/fpu_x86.h (100%)
 rename BasiliskII/src/uae_cpu/{ => fpu}/fpu_x86_asm.h (100%)

diff --git a/BasiliskII/src/Unix/configure.in b/BasiliskII/src/Unix/configure.in
index 184d4740..6d1bb18f 100644
--- a/BasiliskII/src/Unix/configure.in
+++ b/BasiliskII/src/Unix/configure.in
@@ -11,6 +11,18 @@ AC_ARG_ENABLE(xf86-vidmode,  [  --enable-xf86-vidmode   use the XFree86 VidMode
 AC_ARG_ENABLE(fbdev-dga,     [  --enable-fbdev-dga      use direct frame buffer access via /dev/fb [default=yes]], [WANT_FBDEV_DGA=$enableval], [WANT_FBDEV_DGA=yes])
 AC_ARG_ENABLE(vosf,          [  --enable-vosf           enable video on SEGV signals [default=no]], [WANT_VOSF=$enableval], [WANT_VOSF=no])
 
+dnl FPU emulation core.
+AC_ARG_ENABLE(fpe,
+[  --enable-fpe=which      specify which fpu emulator to use [default=opt]],
+[ case "$enableval" in
+    default)	FPE_CORE="default";; dnl fpu_x86.cpp if i386 architecture, fpu_uae.cpp otherwise
+	uae)		FPE_CORE="uae";;
+	*)			AC_MSG_ERROR([--enable-fpe takes only one of the following values: default, uae]);;
+  esac
+],
+[ FPE_CORE="default"
+])
+
 dnl Addressing modes.
 AC_ARG_ENABLE(addressing,
 [  --enable-addressing=AM  specify the addressing mode to use [default=fastest]],
@@ -601,6 +613,44 @@ elif [[ "x$WANT_NATIVE_M68K" = "xyes" ]]; then
   CPUSRCS="asm_support.s"
 fi
 
+dnl Select appropriate FPU source.
+dnl 1. Optimized X86 assembly core if target is i386 architecture
+SAVED_DEFINES=$DEFINES
+if [[ "x$FPE_CORE" = "xdefault" ]]; then
+  if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" -a "x$HAVE_GAS" = "xyes" ]]; then
+    DEFINES="$DEFINES -DFPU_X86"
+    FPE_CORE_STR="i386 optimized core"
+    FPUSRCS="../uae_cpu/fpu/fpu_x86.cpp"
+  fi
+fi
+
+dnl 2. JIT-FPU only supports IEEE-based implementation.
+if [[ "x$WANT_JIT_FPU" = "xyes" -a "x$FPE_CORE" != "xieee" ]]; then
+  AC_MSG_WARN([Sorry, JIT-FPU supports only the "ieee" FPE implementation])
+  FPE_CORE="ieee"
+  dnl Restore previous variables. FPE_CORE_STR and FPUSRCS are overwritten
+  DEFINES=$SAVED_DEFINES
+fi
+
+dnl 3. Choose either IEEE-based implementation or the old UAE core
+if [[ "x$FPE_CORE" = "xieee" ]]; then
+  AC_CHECK_HEADERS(fenv.h)
+  AC_CHECK_FUNCS(feclearexcept fegetexceptflag feraiseexcept fesetexceptflag fetestexcept)
+  AC_CHECK_FUNCS(fegetround fesetround)
+  DEFINES="$DEFINES -DFPU_IEEE"
+  FPE_CORE_STR="ieee-based fpu core"
+  FPUSRCS="../uae_cpu/fpu/fpu_ieee.cpp"
+elif [[ "x$FPE_CORE" = "xuae" ]]; then
+  DEFINES="$DEFINES -DFPU_UAE"
+  FPE_CORE_STR="original uae core"
+  FPUSRCS="../uae_cpu/fpu/fpu_uae.cpp"
+fi
+
+dnl Check for certain math functions
+AC_CHECK_FUNCS(atanh)
+AC_CHECK_FUNCS(isnan isinf)		dnl C99
+AC_CHECK_FUNCS(isnanl isinfl)	dnl IEEE ?
+
 dnl UAE CPU sources for all non-m68k-native architectures.
 if [[ "x$WANT_NATIVE_M68K" = "xno" ]]; then
   CPUINCLUDES="-I../uae_cpu"
@@ -633,6 +683,7 @@ echo ESD sound support ................ : $WANT_ESD
 echo GTK user interface ............... : $WANT_GTK
 echo mon debugger support ............. : $WANT_MON
 echo Running m68k code natively ....... : $WANT_NATIVE_M68K
+echo Floating-Point emulation core .... : $FPE_CORE_STR
 echo Assembly optimizations ........... : $ASM_OPTIMIZATIONS
 echo Addressing mode .................. : $ADDRESSING_MODE
 echo
diff --git a/BasiliskII/src/uae_cpu/fpp.cpp b/BasiliskII/src/uae_cpu/fpu/fpu_uae.cpp
similarity index 100%
rename from BasiliskII/src/uae_cpu/fpp.cpp
rename to BasiliskII/src/uae_cpu/fpu/fpu_uae.cpp
diff --git a/BasiliskII/src/uae_cpu/fpu_x86.cpp b/BasiliskII/src/uae_cpu/fpu/fpu_x86.cpp
similarity index 99%
rename from BasiliskII/src/uae_cpu/fpu_x86.cpp
rename to BasiliskII/src/uae_cpu/fpu/fpu_x86.cpp
index d530dbb5..01b79a5b 100644
--- a/BasiliskII/src/uae_cpu/fpu_x86.cpp
+++ b/BasiliskII/src/uae_cpu/fpu/fpu_x86.cpp
@@ -135,8 +135,8 @@
 #include "memory.h"
 #include "readcpu.h"
 #include "newcpu.h"
-#include "fpu_x86.h"
-#include "fpu_x86_asm.h"
+#include "fpu/fpu_x86.h"
+#include "fpu/fpu_x86_asm.h"
 
 /* ---------------------------- Compatibility ---------------------------- */
 
diff --git a/BasiliskII/src/uae_cpu/fpu_x86.h b/BasiliskII/src/uae_cpu/fpu/fpu_x86.h
similarity index 100%
rename from BasiliskII/src/uae_cpu/fpu_x86.h
rename to BasiliskII/src/uae_cpu/fpu/fpu_x86.h
diff --git a/BasiliskII/src/uae_cpu/fpu_x86_asm.h b/BasiliskII/src/uae_cpu/fpu/fpu_x86_asm.h
similarity index 100%
rename from BasiliskII/src/uae_cpu/fpu_x86_asm.h
rename to BasiliskII/src/uae_cpu/fpu/fpu_x86_asm.h