48f5fd9660
Clean copy of version XHEAAC_V1_36 as delivered 2018/4/13 Sole change is to map cr/lf line termination to unix lf. Added appropriate LICENSE, MODULE_LICENSE_APACHE2, and NOTICE files as part of folding into internal master. Bug: 77287124 Test: CTS audio/media Change-Id: I3c8d124033f967b29d6e384cce5c843ee17a7bb1
67 lines
1.9 KiB
ArmAsm
67 lines
1.9 KiB
ArmAsm
.text
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.p2align 2
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.global ia_eld_decoder_sbr_pre_twiddle
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ia_eld_decoder_sbr_pre_twiddle:
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STMFD sp!, {r4-r12, r14}
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LDR r4, [r0, #0] @Xre = *pXre
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MOV r3, #62 @Loop count
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LDR r5, [r1, #0] @Xim = *pXim
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LOOP:
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LDR r6, [r2], #4 @Load and increment pointer *pTwiddles++ Lower - cosine , higher - sine
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SUBS r3, r3, #1 @Decrement loop count by 1
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SMULWB r8, r4, r6 @mult32x16in32(Xre, cosine)
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LSL r8, r8, #1 @Left shift the multiplied value by 1
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SMULWT r10, r5, r6 @mult32x16in32( Xim , sine)
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ADD r12, r8, r10, LSL #1 @mac32x16in32_shl( mult32x16in32_shl(Xre, cosine) , mult32x16in32_shl( Xim , sine))@
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SMULWT r7, r4, r6 @mult32x16in32(Xre, sine)
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LDR r4, [r0, #4] @Load next iteration value Xre = *pXre
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SMULWB r9, r5, r6 @mult32x16in32(Xim, cosine)
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STR r12, [r0], #4 @Store and increment pointer *pXre++ = re
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LSL r9, r9, #1 @Left shift the multiplied value by 1
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LDR r5, [r1, #4] @Load next iteration value Xim = *pXim
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SUB r14, r9, r7, LSL #1 @sub32(mult32x16in32_shl(Xim, cosine) , mult32x16in32_shl(Xre, sine))
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STR r14, [r1], #4 @Store and increment pointer *pXim++ = im
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BNE LOOP @Check r3 equals 0 and continue
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EPILOUGE:
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LDR r6, [r2], #4
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SMULWB r8, r4, r6
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LSL r8, r8, #1
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SMULWT r10, r5, r6
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ADD r12, r8, r10, LSL #1
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SMULWB r9, r5, r6
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LSL r9, r9, #1
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SMULWT r7, r4, r6
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SUB r14, r9, r7, LSL #1
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STR r12, [r0], #4
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STR r14, [r1], #4
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END_LOOP:
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LDMFD sp!, {r4-r12, pc}
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