From e447d7d65f99d097aa4b4d2cbf6a76d93eb9c136 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Falk=20H=C3=BCffner?= <mellum@users.sourceforge.net>
Date: Sat, 5 Oct 2002 00:12:58 +0000
Subject: [PATCH] Some nifty stuff for upcoming patches.
Originally committed as revision 1004 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/alpha/asm.h | 38 ++++++++++++++++++++++++++++++++++++--
1 file changed, 36 insertions(+), 2 deletions(-)
diff --git a/libavcodec/alpha/asm.h b/libavcodec/alpha/asm.h
index 2fdbdf13d94..c2983125a0c 100644
--- a/libavcodec/alpha/asm.h
+++ b/libavcodec/alpha/asm.h
@@ -22,6 +22,21 @@
#include <inttypes.h>
+#if defined __GNUC__
+# define GNUC_PREREQ(maj, min) \
+ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+#else
+# define GNUC_PREREQ(maj, min) 0
+#endif
+
+#if GNUC_PREREQ(2,96)
+# define likely(x) __builtin_expect((x) != 0, 1)
+# define unlikely(x) __builtin_expect((x) != 0, 0)
+#else
+# define likely(x) (x)
+# define unlikely(x) (x)
+#endif
+
#define AMASK_BWX (1 << 0)
#define AMASK_FIX (1 << 1)
#define AMASK_CIX (1 << 2)
@@ -45,6 +60,7 @@ inline static uint64_t WORD_VEC(uint64_t x)
#define ldl(p) (*(const int32_t *) (p))
#define stl(l, p) do { *(uint32_t *) (p) = (l); } while (0)
#define stq(l, p) do { *(uint64_t *) (p) = (l); } while (0)
+#define sextw(x) ((int16_t) (x))
#ifdef __GNUC__
#define ASM_ACCEPT_MVI asm (".arch pca56")
@@ -52,10 +68,26 @@ struct unaligned_long { uint64_t l; } __attribute__((packed));
#define ldq_u(p) (*(const uint64_t *) (((uint64_t) (p)) & ~7ul))
#define uldq(a) (((const struct unaligned_long *) (a))->l)
-#if __GNUC__ >= 3 && __GNUC_MINOR__ >= 3
+#if GNUC_PREREQ(3,0)
+/* Unfortunately, __builtin_prefetch is slightly buggy on Alpha. The
+ defines here are kludged so we still get the right
+ instruction. This needs to be adapted as soon as gcc is fixed. */
+# define prefetch(p) __builtin_prefetch((p), 0, 1)
+# define prefetch_en(p) __builtin_prefetch((p), 1, 1)
+# define prefetch_m(p) __builtin_prefetch((p), 0, 0)
+# define prefetch_men(p) __builtin_prefetch((p), 1, 0)
+#else
+# define prefetch(p) asm volatile("ldl $31,%0" : : "m"(*(const char *) (p)) : "memory")
+# define prefetch_en(p) asm volatile("ldq $31,%0" : : "m"(*(const char *) (p)) : "memory")
+# define prefetch_m(p) asm volatile("lds $f31,%0" : : "m"(*(const char *) (p)) : "memory")
+# define prefetch_men(p) asm volatile("ldt $f31,%0" : : "m"(*(const char *) (p)) : "memory")
+#endif
+
+#if GNUC_PREREQ(3,3)
#define cmpbge __builtin_alpha_cmpbge
/* Avoid warnings. */
#define extql(a, b) __builtin_alpha_extql(a, (uint64_t) (b))
+#define extwl(a, b) __builtin_alpha_extwl(a, (uint64_t) (b))
#define extqh(a, b) __builtin_alpha_extqh(a, (uint64_t) (b))
#define zap __builtin_alpha_zap
#define zapnot __builtin_alpha_zapnot
@@ -78,6 +110,7 @@ struct unaligned_long { uint64_t l; } __attribute__((packed));
#else
#define cmpbge(a, b) ({ uint64_t __r; asm ("cmpbge %r1,%2,%0" : "=r" (__r) : "rJ" (a), "rI" (b)); __r; })
#define extql(a, b) ({ uint64_t __r; asm ("extql %r1,%2,%0" : "=r" (__r) : "rJ" (a), "rI" (b)); __r; })
+#define extwl(a, b) ({ uint64_t __r; asm ("extwl %r1,%2,%0" : "=r" (__r) : "rJ" (a), "rI" (b)); __r; })
#define extqh(a, b) ({ uint64_t __r; asm ("extqh %r1,%2,%0" : "=r" (__r) : "rJ" (a), "rI" (b)); __r; })
#define zap(a, b) ({ uint64_t __r; asm ("zap %r1,%2,%0" : "=r" (__r) : "rJ" (a), "rI" (b)); __r; })
#define zapnot(a, b) ({ uint64_t __r; asm ("zapnot %r1,%2,%0" : "=r" (__r) : "rJ" (a), "rI" (b)); __r; })
@@ -99,7 +132,7 @@ struct unaligned_long { uint64_t l; } __attribute__((packed));
#define unpkbw(a) ({ uint64_t __r; asm ("unpkbw %r1,%0" : "=r" (__r) : "rJ" (a)); __r; })
#endif
-#elif defined(__DECC) /* Digital/Compaq "ccc" compiler */
+#elif defined(__DECC) /* Digital/Compaq/hp "ccc" compiler */
#include <c_asm.h>
#define ASM_ACCEPT_MVI
@@ -107,6 +140,7 @@ struct unaligned_long { uint64_t l; } __attribute__((packed));
#define uldq(a) (*(const __unaligned uint64_t *) (a))
#define cmpbge(a, b) asm ("cmpbge %a0,%a1,%v0", a, b)
#define extql(a, b) asm ("extql %a0,%a1,%v0", a, b)
+#define extwl(a, b) asm ("extwl %a0,%a1,%v0", a, b)
#define extqh(a, b) asm ("extqh %a0,%a1,%v0", a, b)
#define zap(a, b) asm ("zap %a0,%a1,%v0", a, b)
#define zapnot(a, b) asm ("zapnot %a0,%a1,%v0", a, b)
--
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