Hi,
as discussed in IRC, I was trying to minimal-invasively port
libpostproc (the Debian source package) to x32¹. I could not
test it (for lack of a stand-alone test program) yet, but at
least I got it to build.
As requested, the patch I used is attached. It’s not optimal
as the arch could use the wider registers, but probably good
enough, should it do what it’s supposed to ;-)
bye,
//mirabilos
① https://wiki.debian.org/X32Port
--
“ah that reminds me, thanks for the stellar entertainment that you and certain
other people provide on the Debian mailing lists │ sole reason I subscribed to
them (I'm not using Debian anywhere) is the entertainment factor │ Debian does
not strike me as a place for good humour, much less German admin-style humour”
# DP: Port to x32
# DP: There is no GCC documentation about the asm præficēs except
# DP: in http://stackoverflow.com/a/17825185/2171120 – go figure…
--- a/configure
+++ b/configure
@@ -811,6 +811,7 @@ ARCH_LIST='
sparc
sparc64
tomi
+ x32
x86
x86_32
x86_64
@@ -2190,7 +2191,9 @@ case "$arch" in
check_cc <<EOF && subarch="x86_64"
int test[(int)sizeof(char*) - 7];
EOF
- if test "$subarch" = "x86_64"; then
+ test "$subarch" = "x86_32" && check_cpp_condition sys/types.h \
+ 'defined(__x86_64__) && defined(__ILP32__)' && subarch="x32"
+ if test "$subarch" = "x86_64" || test "$subarch" = "x32"; then
spic=$shared
fi
;;
--- a/libpostproc/postprocess_template.c
+++ b/libpostproc/postprocess_template.c
@@ -29,7 +29,7 @@
#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
-#if ARCH_X86_64 && defined(PIC)
+#if (ARCH_X32 || ARCH_X86_64) && defined(PIC)
# define LOCAL_MANGLE(a) #a "(%%rip)"
#else
# define LOCAL_MANGLE(a) #a
@@ -1142,10 +1142,10 @@ FIND_MIN_MAX((%0, %1, 8))
#endif
"movq %%mm6, %%mm0 \n\t" // max
"psubb %%mm7, %%mm6 \n\t" // max - min
- "push %4 \n\t"
+ "pushq %q4 \n\t"
"movd %%mm6, %k4 \n\t"
"cmpb "MANGLE(deringThreshold)", %b4 \n\t"
- "pop %4 \n\t"
+ "popq %q4 \n\t"
" jb 1f \n\t"
PAVGB(%%mm0, %%mm7) // a=(max + min)/2
"punpcklbw %%mm7, %%mm7 \n\t"
--- a/libpostproc/x86/asm.h
+++ b/libpostproc/x86/asm.h
@@ -64,14 +64,34 @@ typedef int32_t x86_reg;
# define REGc ecx
# define REGd edx
# define REGSP esp
+#elif ARCH_X32
+
+# define OPSIZE "l"
+# define REG_a "eax"
+# define REG_b "ebx"
+# define REG_c "ecx"
+# define REG_d "edx"
+# define REG_D "edi"
+# define REG_S "esi"
+# define PTR_SIZE "4"
+typedef int32_t x86_reg;
+
+/* do not define REG_SP so code using it fails */
+# define REG_BP "ebp"
+# define REGBP ebp
+# define REGa eax
+# define REGb ebx
+# define REGc ecx
+# define REGd edx
+/* do not define REGSP so code using it fails */
#else
typedef int x86_reg;
#endif
-#define HAVE_7REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE))
-#define HAVE_6REGS (ARCH_X86_64 || (HAVE_EBX_AVAILABLE || HAVE_EBP_AVAILABLE))
+#define HAVE_7REGS (ARCH_X32 || ARCH_X86_64 || (HAVE_EBX_AVAILABLE &&
HAVE_EBP_AVAILABLE))
+#define HAVE_6REGS (ARCH_X32 || ARCH_X86_64 || (HAVE_EBX_AVAILABLE ||
HAVE_EBP_AVAILABLE))
-#if ARCH_X86_64 && defined(PIC)
+#if (ARCH_X32 || ARCH_X86_64) && defined(PIC)
# define BROKEN_RELOCATIONS 1
#endif
@@ -99,7 +119,7 @@ typedef int x86_reg;
#define LABEL_MANGLE(a) EXTERN_PREFIX #a
// Use rip-relative addressing if compiling PIC code on x86-64.
-#if ARCH_X86_64 && defined(PIC)
+#if (ARCH_X32 || ARCH_X86_64) && defined(PIC)
# define LOCAL_MANGLE(a) #a "(%%rip)"
#else
# define LOCAL_MANGLE(a) #a
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
