1 files changed, 75 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrwbenc/src/asm/ARMV5E/scale_sig_opt.s b/media/libstagefright/codecs/amrwbenc/src/asm/ARMV5E/scale_sig_opt.s
new file mode 100644
index 0000000..aa9f464
--- /dev/null
+++ b/media/libstagefright/codecs/amrwbenc/src/asm/ARMV5E/scale_sig_opt.s
@@ -0,0 +1,75 @@
+@/*
+@ ** Copyright 2003-2010, VisualOn, Inc.
+@ **
+@ ** Licensed under the Apache License, Version 2.0 (the "License");
+@ ** you may not use this file except in compliance with the License.
+@ ** You may obtain a copy of the License at
+@ **
+@ **     http://www.apache.org/licenses/LICENSE-2.0
+@ **
+@ ** Unless required by applicable law or agreed to in writing, software
+@ ** distributed under the License is distributed on an "AS IS" BASIS,
+@ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@ ** See the License for the specific language governing permissions and
+@ ** limitations under the License.
+@ */
+@
+@void Scale_sig(
+@	       Word16 x[],                           /* (i/o) : signal to scale               */
+@	       Word16 lg,                            /* (i)   : size of x[]                   */
+@	       Word16 exp                            /* (i)   : exponent: x = round(x << exp) */
+@	       )
+@
+@r0 --- x[]
+@r1 --- lg
+@r2 --- exp
+
+          .section  .text
+	  .global   Scale_sig_opt
+
+Scale_sig_opt:
+
+         STMFD         r13!, {r4 - r12, r14}
+	 SUB           r3, r1, #1                  @i = lg - 1
+         CMP           r2, #0                      @Compare exp and 0
+	 RSB           r7, r2, #0                  @exp = -exp
+	 ADD           r10, r2, #16                @16 + exp
+         ADD           r4, r0, r3, LSL #1          @x[i] address
+	 MOV           r8, #0x7fffffff
+	 MOV           r9, #0x8000
+	 BLE           LOOP2
+	 
+LOOP1:
+
+         LDRSH          r5, [r4]                    @load x[i]
+         MOV           r12, r5, LSL r10
+	 TEQ           r5, r12, ASR r10
+	 EORNE         r12, r8, r5, ASR #31
+	 SUBS          r3, r3, #1
+	 QADD          r11, r12, r9
+	 MOV           r12, r11, ASR #16
+	 STRH          r12, [r4], #-2
+	 BGE           LOOP1
+         BL            The_end
+
+LOOP2:
+
+         LDRSH          r5, [r4]                   @load x[i]
+	 MOV           r6, r5, LSL #16            @L_tmp = x[i] << 16
+	 MOV           r5, r6, ASR r7             @L_tmp >>= exp
+	 QADD          r11, r5, r9
+	 MOV           r12, r11, ASR #16
+	 SUBS          r3, r3, #1
+	 STRH          r12, [r4], #-2
+	 BGE           LOOP2
+
+The_end:
+         LDMFD         r13!, {r4 - r12, r15}
+     
+         @ENDFUNC
+         .END	 
+        
+	
+	  
+
+