/**************************************************************************** (C) copyright Fraunhofer IIS (2004) All Rights Reserved Please be advised that this software and/or program delivery is Confidential Information of Fraunhofer and subject to and covered by the Fraunhofer IIS Software Evaluation Agreement between Google Inc. and Fraunhofer effective and in full force since March 1, 2012. You may use this software and/or program only under the terms and conditions described in the above mentioned Fraunhofer IIS Software Evaluation Agreement. Any other and/or further use requires a separate agreement. $Id$ ***************************************************************************/ #ifdef FUNCTION_dct_IV_func1 /* Note: This assembler routine is here, because the ARM926 compiler does not encode the inline assembler with optimal speed. With this version, we save 2 cycles per loop iteration. */ __asm void dct_IV_func1( int i, const FIXP_SPK *twiddle, FIXP_DBL *RESTRICT pDat_0, FIXP_DBL *RESTRICT pDat_1) { /* Register map: r0 i r1 twiddle r2 pDat_0 r3 pDat_1 r4 accu1 r5 accu2 r6 accu3 r7 accu4 r8 val_tw r9 accuX */ PUSH {r4-r9} /* 44 cycles for 2 iterations = 22 cycles/iteration */ dct_IV_loop1_start /* First iteration */ LDR r8, [r1], #4 // val_tw = *twiddle++; LDR r5, [r2, #0] // accu2 = pDat_0[0] LDR r4, [r3, #0] // accu1 = pDat_1[0] SMULWT r9, r5, r8 // accuX = accu2*val_tw.l SMULWB r5, r5, r8 // accu2 = accu2*val_tw.h RSB r9, r9, #0 // accuX =-accu2*val_tw.l SMLAWT r5, r4, r8, r5 // accu2 = accu2*val_tw.h + accu1*val_tw.l SMLAWB r4, r4, r8, r9 // accu1 = accu1*val_tw.h - accu2*val_tw.l LDR r8, [r1], #4 // val_tw = *twiddle++; LDR r7, [r3, #-4] // accu4 = pDat_1[-1] LDR r6, [r2, #4] // accu3 = pDat_0[1] SMULWB r9, r7, r8 // accuX = accu4*val_tw.h SMULWT r7, r7, r8 // accu4 = accu4*val_tw.l RSB r9, r9, #0 // accuX =-accu4*val_tw.h SMLAWB r7, r6, r8, r7 // accu4 = accu4*val_tw.l+accu3*val_tw.h SMLAWT r6, r6, r8, r9 // accu3 = accu3*val_tw.l-accu4*val_tw.h STR r5, [r2], #4 // *pDat_0++ = accu2 STR r4, [r2], #4 // *pDat_0++ = accu1 STR r6, [r3], #-4 // *pDat_1-- = accu3 STR r7, [r3], #-4 // *pDat_1-- = accu4 /* Second iteration */ LDR r8, [r1], #4 // val_tw = *twiddle++; LDR r5, [r2, #0] // accu2 = pDat_0[0] LDR r4, [r3, #0] // accu1 = pDat_1[0] SMULWT r9, r5, r8 // accuX = accu2*val_tw.l SMULWB r5, r5, r8 // accu2 = accu2*val_tw.h RSB r9, r9, #0 // accuX =-accu2*val_tw.l SMLAWT r5, r4, r8, r5 // accu2 = accu2*val_tw.h + accu1*val_tw.l SMLAWB r4, r4, r8, r9 // accu1 = accu1*val_tw.h - accu2*val_tw.l LDR r8, [r1], #4 // val_tw = *twiddle++; LDR r7, [r3, #-4] // accu4 = pDat_1[-1] LDR r6, [r2, #4] // accu3 = pDat_0[1] SMULWB r9, r7, r8 // accuX = accu4*val_tw.h SMULWT r7, r7, r8 // accu4 = accu4*val_tw.l RSB r9, r9, #0 // accuX =-accu4*val_tw.h SMLAWB r7, r6, r8, r7 // accu4 = accu4*val_tw.l+accu3*val_tw.h SMLAWT r6, r6, r8, r9 // accu3 = accu3*val_tw.l-accu4*val_tw.h STR r5, [r2], #4 // *pDat_0++ = accu2 STR r4, [r2], #4 // *pDat_0++ = accu1 STR r6, [r3], #-4 // *pDat_1-- = accu3 STR r7, [r3], #-4 // *pDat_1-- = accu4 SUBS r0, r0, #1 BNE dct_IV_loop1_start POP {r4-r9} BX lr } #endif /* FUNCTION_dct_IV_func1 */ #ifdef FUNCTION_dct_IV_func2 FDK_INLINE /* __attribute__((noinline)) */ static void dct_IV_func2( int i, const FIXP_SPK *twiddle, FIXP_DBL *pDat_0, FIXP_DBL *pDat_1, int inc) { FIXP_DBL accu1, accu2, accu3, accu4, accuX; LONG val_tw; accu1 = pDat_1[-2]; accu2 = pDat_1[-1]; *--pDat_1 = -(pDat_0[1]>>1); *pDat_0++ = (pDat_0[0]>>1); twiddle += inc; __asm { LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc B dct_IV_loop2_2nd_part /* 42 cycles for 2 iterations = 21 cycles/iteration */ dct_IV_loop2: SMULWT accuX, accu2, val_tw SMULWB accu2, accu2, val_tw RSB accuX, accuX, #0 SMLAWB accuX, accu1, val_tw, accuX SMLAWT accu2, accu1, val_tw, accu2 STR accuX, [pDat_0], #4 STR accu2, [pDat_1, #-4] ! LDR accu4, [pDat_0, #4] LDR accu3, [pDat_0] SMULWB accuX, accu4, val_tw SMULWT accu4, accu4, val_tw RSB accuX, accuX, #0 SMLAWT accuX, accu3, val_tw, accuX SMLAWB accu4, accu3, val_tw, accu4 LDR accu1, [pDat_1, #-8] LDR accu2, [pDat_1, #-4] LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc STR accuX, [pDat_1, #-4] ! STR accu4, [pDat_0], #4 dct_IV_loop2_2nd_part: SMULWT accuX, accu2, val_tw SMULWB accu2, accu2, val_tw RSB accuX, accuX, #0 SMLAWB accuX, accu1, val_tw, accuX SMLAWT accu2, accu1, val_tw, accu2 STR accuX, [pDat_0], #4 STR accu2, [pDat_1, #-4] ! LDR accu4, [pDat_0, #4] LDR accu3, [pDat_0] SMULWB accuX, accu4, val_tw SMULWT accu4, accu4, val_tw RSB accuX, accuX, #0 SMLAWT accuX, accu3, val_tw, accuX SMLAWB accu4, accu3, val_tw, accu4 LDR accu1, [pDat_1, #-8] LDR accu2, [pDat_1, #-4] STR accuX, [pDat_1, #-4] ! STR accu4, [pDat_0], #4 LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc SUBS i, i, #1 BNE dct_IV_loop2 } /* Last Sin and Cos value pair are the same */ accu1 = fMultDiv2(accu1, WTC(0x5a82799a)); accu2 = fMultDiv2(accu2, WTC(0x5a82799a)); *--pDat_1 = accu1 + accu2; *pDat_0++ = accu1 - accu2; } #endif /* FUNCTION_dct_IV_func2 */ #ifdef FUNCTION_dst_IV_func1 __asm void dst_IV_func1( int i, const FIXP_SPK *twiddle, FIXP_DBL *pDat_0, FIXP_DBL *pDat_1) { /* Register map: r0 i r1 twiddle r2 pDat_0 r3 pDat_1 r4 accu1 r5 accu2 r6 accu3 r7 accu4 r8 val_tw r9 accuX */ PUSH {r4-r9} dst_IV_loop1 LDR r8, [r1], #4 // val_tw = *twiddle++ LDR r5, [r2] // accu2 = pDat_0[0] LDR r6, [r2, #4] // accu3 = pDat_0[1] RSB r5, r5, #0 // accu2 = -accu2 SMULWT r9, r5, r8 // accuX = (-accu2)*val_tw.l LDR r4, [r3, #-4] // accu1 = pDat_1[-1] RSB r9, r9, #0 // accuX = -(-accu2)*val_tw.l SMLAWB r9, r4, r8, r9 // accuX = accu1*val_tw.h-(-accu2)*val_tw.l SMULWT r4, r4, r8 // accu1 = accu1*val_tw.l LDR r7, [r3, #-8] // accu4 = pDat_1[-2] SMLAWB r5, r5, r8, r4 // accu2 = (-accu2)*val_tw.t+accu1*val_tw.l LDR r8, [r1], #4 // val_tw = *twiddle++ STR r5, [r2], #4 // *pDat_0++ = accu2 STR r9, [r2], #4 // *pDat_0++ = accu1 (accuX) RSB r7, r7, #0 // accu4 = -accu4 SMULWB r5, r7, r8 // accu2 = (-accu4)*val_tw.h SMULWB r4, r6, r8 // accu1 = (-accu4)*val_tw.l RSB r5, r5, #0 // accu2 = -(-accu4)*val_tw.h SMLAWT r6, r6, r8, r5 // accu3 = (-accu4)*val_tw.l-(-accu3)*val_tw.h SMLAWT r7, r7, r8, r4 // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h STR r6, [r3, #-4] ! // *--pDat_1 = accu3 STR r7, [r3, #-4] ! // *--pDat_1 = accu4 LDR r8, [r1], #4 // val_tw = *twiddle++ LDR r5, [r2] // accu2 = pDat_0[0] LDR r6, [r2, #4] // accu3 = pDat_0[1] RSB r5, r5, #0 // accu2 = -accu2 SMULWT r9, r5, r8 // accuX = (-accu2)*val_tw.l LDR r4, [r3, #-4] // accu1 = pDat_1[-1] RSB r9, r9, #0 // accuX = -(-accu2)*val_tw.l SMLAWB r9, r4, r8, r9 // accuX = accu1*val_tw.h-(-accu2)*val_tw.l SMULWT r4, r4, r8 // accu1 = accu1*val_tw.l LDR r7, [r3, #-8] // accu4 = pDat_1[-2] SMLAWB r5, r5, r8, r4 // accu2 = (-accu2)*val_tw.t+accu1*val_tw.l LDR r8, [r1], #4 // val_tw = *twiddle++ STR r5, [r2], #4 // *pDat_0++ = accu2 STR r9, [r2], #4 // *pDat_0++ = accu1 (accuX) RSB r7, r7, #0 // accu4 = -accu4 SMULWB r5, r7, r8 // accu2 = (-accu4)*val_tw.h SMULWB r4, r6, r8 // accu1 = (-accu4)*val_tw.l RSB r5, r5, #0 // accu2 = -(-accu4)*val_tw.h SMLAWT r6, r6, r8, r5 // accu3 = (-accu4)*val_tw.l-(-accu3)*val_tw.h SMLAWT r7, r7, r8, r4 // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h STR r6, [r3, #-4] ! // *--pDat_1 = accu3 STR r7, [r3, #-4] ! // *--pDat_1 = accu4 SUBS r0, r0, #4 // i-= 4 BNE dst_IV_loop1 POP {r4-r9} BX lr } #endif /* FUNCTION_dst_IV_func1 */ #ifdef FUNCTION_dst_IV_func2 FDK_INLINE /* __attribute__((noinline)) */ static void dst_IV_func2( int i, const FIXP_SPK *twiddle, FIXP_DBL *RESTRICT pDat_0, FIXP_DBL *RESTRICT pDat_1, int inc) { FIXP_DBL accu1,accu2,accu3,accu4; LONG val_tw; accu4 = pDat_0[0]; accu3 = pDat_0[1]; accu4 >>= 1; accu3 >>= 1; accu4 = -accu4; accu1 = pDat_1[-1]; accu2 = pDat_1[0]; *pDat_0++ = accu3; *pDat_1-- = accu4; __asm { B dst_IV_loop2_2nd_part /* 50 cycles for 2 iterations = 25 cycles/iteration */ dst_IV_loop2: LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc RSB accu2, accu2, #0 // accu2 = -accu2 RSB accu1, accu1, #0 // accu1 = -accu1 SMULWT accu3, accu2, val_tw // accu3 = (-accu2)*val_tw.l SMULWT accu4, accu1, val_tw // accu4 = (-accu1)*val_tw.l RSB accu3, accu3, #0 // accu3 = -accu2*val_tw.l SMLAWB accu1, accu1, val_tw, accu3 // accu1 = -accu1*val_tw.h-(-accu2)*val_tw.l SMLAWB accu2, accu2, val_tw, accu4 // accu2 = (-accu1)*val_tw.l+(-accu2)*val_tw.h STR accu1, [pDat_1], #-4 // *pDat_1-- = accu1 STR accu2, [pDat_0], #4 // *pDat_0++ = accu2 LDR accu4, [pDat_0] // accu4 = pDat_0[0] LDR accu3, [pDat_0, #4] // accu3 = pDat_0[1] RSB accu4, accu4, #0 // accu4 = -accu4 RSB accu3, accu3, #0 // accu3 = -accu3 SMULWB accu1, accu3, val_tw // accu1 = (-accu3)*val_tw.h SMULWT accu2, accu3, val_tw // accu2 = (-accu3)*val_tw.l RSB accu1, accu1, #0 // accu1 = -(-accu3)*val_tw.h SMLAWT accu3, accu4, val_tw, accu1 // accu3 = (-accu4)*val_tw.l-(-accu3)*val_tw.h SMLAWB accu4, accu4, val_tw, accu2 // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h LDR accu1, [pDat_1, #-4] // accu1 = pDat_1[-1] LDR accu2, [pDat_1] // accu2 = pDat_1[0] STR accu3, [pDat_0], #4 // *pDat_0++ = accu3 STR accu4, [pDat_1], #-4 // *pDat_1-- = accu4 dst_IV_loop2_2nd_part: LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc RSB accu2, accu2, #0 // accu2 = -accu2 RSB accu1, accu1, #0 // accu1 = -accu1 SMULWT accu3, accu2, val_tw // accu3 = (-accu2)*val_tw.l SMULWT accu4, accu1, val_tw // accu4 = (-accu1)*val_tw.l RSB accu3, accu3, #0 // accu3 = -accu2*val_tw.l SMLAWB accu1, accu1, val_tw, accu3 // accu1 = -accu1*val_tw.h-(-accu2)*val_tw.l SMLAWB accu2, accu2, val_tw, accu4 // accu2 = (-accu1)*val_tw.l+(-accu2)*val_tw.h STR accu1, [pDat_1], #-4 // *pDat_1-- = accu1 STR accu2, [pDat_0], #4 // *pDat_0++ = accu2 LDR accu4, [pDat_0] // accu4 = pDat_0[0] LDR accu3, [pDat_0, #4] // accu3 = pDat_0[1] RSB accu4, accu4, #0 // accu4 = -accu4 RSB accu3, accu3, #0 // accu3 = -accu3 SMULWB accu1, accu3, val_tw // accu1 = (-accu3)*val_tw.h SMULWT accu2, accu3, val_tw // accu2 = (-accu3)*val_tw.l RSB accu1, accu1, #0 // accu1 = -(-accu3)*val_tw.h SMLAWT accu3, accu4, val_tw, accu1 // accu3 = (-accu4)*val_tw.l-(-accu3)*val_tw.h SMLAWB accu4, accu4, val_tw, accu2 // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h LDR accu1, [pDat_1, #-4] // accu1 = pDat_1[-1] LDR accu2, [pDat_1] // accu2 = pDat_1[0] STR accu3, [pDat_0], #4 // *pDat_0++ = accu3 STR accu4, [pDat_1], #-4 // *pDat_1-- = accu4 SUBS i, i, #1 BNE dst_IV_loop2 } /* Last Sin and Cos value pair are the same */ accu1 = fMultDiv2(-accu1, WTC(0x5a82799a)); accu2 = fMultDiv2(-accu2, WTC(0x5a82799a)); *pDat_0 = accu1 + accu2; *pDat_1 = accu1 - accu2; } #endif /* FUNCTION_dst_IV_func2 */