ARM: Move asm.S from libavcodec to libavutil

This will allow for easier implementation of ARM-optimized functions in
libraries other than libavcodec.

1 files changed, 231 insertions, 0 deletions

diff --git a/libavutil/arm/asm.S b/libavutil/arm/asm.S
new file mode 100644
index 0000000000..6038a63a27
--- /dev/null
+++ b/libavutil/arm/asm.S
@@ -0,0 +1,231 @@
+/*
+ * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#ifdef __ELF__
+#   define ELF
+#else
+#   define ELF @
+#endif
+
+#if CONFIG_THUMB
+#   define A @
+#   define T
+#else
+#   define A
+#   define T @
+#endif
+
+#if   HAVE_NEON
+        .arch           armv7-a
+#elif HAVE_ARMV6T2
+        .arch           armv6t2
+#elif HAVE_ARMV6
+        .arch           armv6
+#elif HAVE_ARMV5TE
+        .arch           armv5te
+#endif
+
+#if   HAVE_NEON
+        .fpu            neon
+#elif HAVE_ARMVFP
+        .fpu            vfp
+#endif
+
+        .syntax unified
+T       .thumb
+
+.macro  require8 val=1
+ELF     .eabi_attribute 24, \val
+.endm
+
+.macro  preserve8 val=1
+ELF     .eabi_attribute 25, \val
+.endm
+
+.macro  function name, export=0
+    .macro endfunc
+ELF     .size   \name, . - \name
+        .endfunc
+        .purgem endfunc
+    .endm
+        .text
+        .align          2
+    .if \export
+        .global EXTERN_ASM\name
+EXTERN_ASM\name:
+    .endif
+ELF     .type   \name, %function
+        .func   \name
+\name:
+.endm
+
+.macro  const   name, align=2
+    .macro endconst
+ELF     .size   \name, . - \name
+        .purgem endconst
+    .endm
+        .section        .rodata
+        .align          \align
+\name:
+.endm
+
+#if !HAVE_ARMV6T2
+.macro  movw    rd, val
+        mov     \rd, \val &  255
+        orr     \rd, \val & ~255
+.endm
+#endif
+
+.macro  mov32   rd, val
+#if HAVE_ARMV6T2
+        movw            \rd, #(\val) & 0xffff
+    .if (\val) >> 16
+        movt            \rd, #(\val) >> 16
+    .endif
+#else
+        ldr             \rd, =\val
+#endif
+.endm
+
+.macro  movrel rd, val
+#if HAVE_ARMV6T2 && !CONFIG_PIC && !defined(__APPLE__)
+        movw            \rd, #:lower16:\val
+        movt            \rd, #:upper16:\val
+#else
+        ldr             \rd, =\val
+#endif
+.endm
+
+.macro  ldr_pre         rt,  rn,  rm:vararg
+A       ldr             \rt, [\rn, \rm]!
+T       add             \rn, \rn, \rm
+T       ldr             \rt, [\rn]
+.endm
+
+.macro  ldr_dpre        rt,  rn,  rm:vararg
+A       ldr             \rt, [\rn, -\rm]!
+T       sub             \rn, \rn, \rm
+T       ldr             \rt, [\rn]
+.endm
+
+.macro  ldr_nreg        rt,  rn,  rm:vararg
+A       ldr             \rt, [\rn, -\rm]
+T       sub             \rt, \rn, \rm
+T       ldr             \rt, [\rt]
+.endm
+
+.macro  ldr_post        rt,  rn,  rm:vararg
+A       ldr             \rt, [\rn], \rm
+T       ldr             \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  ldrd_reg        rt,  rt2, rn,  rm
+A       ldrd            \rt, \rt2, [\rn, \rm]
+T       add             \rt, \rn, \rm
+T       ldrd            \rt, \rt2, [\rt]
+.endm
+
+.macro  ldrd_post       rt,  rt2, rn,  rm
+A       ldrd            \rt, \rt2, [\rn], \rm
+T       ldrd            \rt, \rt2, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  ldrh_pre        rt,  rn,  rm
+A       ldrh            \rt, [\rn, \rm]!
+T       add             \rn, \rn, \rm
+T       ldrh            \rt, [\rn]
+.endm
+
+.macro  ldrh_dpre       rt,  rn,  rm
+A       ldrh            \rt, [\rn, -\rm]!
+T       sub             \rn, \rn, \rm
+T       ldrh            \rt, [\rn]
+.endm
+
+.macro  ldrh_post       rt,  rn,  rm
+A       ldrh            \rt, [\rn], \rm
+T       ldrh            \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  ldrb_post       rt,  rn,  rm
+A       ldrb            \rt, [\rn], \rm
+T       ldrb            \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  str_post       rt,  rn,  rm:vararg
+A       str             \rt, [\rn], \rm
+T       str             \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  strb_post       rt,  rn,  rm:vararg
+A       strb            \rt, [\rn], \rm
+T       strb            \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  strd_post       rt,  rt2, rn,  rm
+A       strd            \rt, \rt2, [\rn], \rm
+T       strd            \rt, \rt2, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  strh_pre        rt,  rn,  rm
+A       strh            \rt, [\rn, \rm]!
+T       add             \rn, \rn, \rm
+T       strh            \rt, [\rn]
+.endm
+
+.macro  strh_dpre       rt,  rn,  rm
+A       strh            \rt, [\rn, -\rm]!
+T       sub             \rn, \rn, \rm
+T       strh            \rt, [\rn]
+.endm
+
+.macro  strh_post       rt,  rn,  rm
+A       strh            \rt, [\rn], \rm
+T       strh            \rt, [\rn]
+T       add             \rn, \rn, \rm
+.endm
+
+.macro  strh_dpost       rt,  rn,  rm
+A       strh            \rt, [\rn], -\rm
+T       strh            \rt, [\rn]
+T       sub             \rn, \rn, \rm
+.endm
+
+#if HAVE_VFP_ARGS
+        .eabi_attribute 28, 1
+#   define VFP
+#   define NOVFP @
+#else
+#   define VFP   @
+#   define NOVFP
+#endif
+
+#define GLUE(a, b) a ## b
+#define JOIN(a, b) GLUE(a, b)
+#define X(s) JOIN(EXTERN_ASM, s)