diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/armv4l/jrevdct_arm.S')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/armv4l/jrevdct_arm.S | 386 |
1 files changed, 0 insertions, 386 deletions
diff --git a/contrib/ffmpeg/libavcodec/armv4l/jrevdct_arm.S b/contrib/ffmpeg/libavcodec/armv4l/jrevdct_arm.S deleted file mode 100644 index 294ea4750..000000000 --- a/contrib/ffmpeg/libavcodec/armv4l/jrevdct_arm.S +++ /dev/null @@ -1,386 +0,0 @@ -/* - C-like prototype : - void j_rev_dct_ARM(DCTBLOCK data) - - With DCTBLOCK being a pointer to an array of 64 'signed shorts' - - Copyright (c) 2001 Lionel Ulmer (lionel.ulmer@free.fr / bbrox@bbrox.org) - - Permission is hereby granted, free of charge, to any person obtaining a copy - of this software and associated documentation files (the "Software"), to deal - in the Software without restriction, including without limitation the rights - to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - copies of the Software, and to permit persons to whom the Software is - furnished to do so, subject to the following conditions: - - The above copyright notice and this permission notice shall be included in - all copies or substantial portions of the Software. - - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER - IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - -*/ -#define FIX_0_298631336 2446 -#define FIX_0_541196100 4433 -#define FIX_0_765366865 6270 -#define FIX_1_175875602 9633 -#define FIX_1_501321110 12299 -#define FIX_2_053119869 16819 -#define FIX_3_072711026 25172 -#define FIX_M_0_390180644 -3196 -#define FIX_M_0_899976223 -7373 -#define FIX_M_1_847759065 -15137 -#define FIX_M_1_961570560 -16069 -#define FIX_M_2_562915447 -20995 -#define FIX_0xFFFF 0xFFFF - -#define FIX_0_298631336_ID 0 -#define FIX_0_541196100_ID 4 -#define FIX_0_765366865_ID 8 -#define FIX_1_175875602_ID 12 -#define FIX_1_501321110_ID 16 -#define FIX_2_053119869_ID 20 -#define FIX_3_072711026_ID 24 -#define FIX_M_0_390180644_ID 28 -#define FIX_M_0_899976223_ID 32 -#define FIX_M_1_847759065_ID 36 -#define FIX_M_1_961570560_ID 40 -#define FIX_M_2_562915447_ID 44 -#define FIX_0xFFFF_ID 48 - .text - .align - - .global j_rev_dct_ARM -j_rev_dct_ARM: - stmdb sp!, { r4 - r12, lr } @ all callee saved regs - - sub sp, sp, #4 @ reserve some space on the stack - str r0, [ sp ] @ save the DCT pointer to the stack - - mov lr, r0 @ lr = pointer to the current row - mov r12, #8 @ r12 = row-counter - add r11, pc, #(const_array-.-8) @ r11 = base pointer to the constants array -row_loop: - ldrsh r0, [lr, # 0] @ r0 = 'd0' - ldrsh r1, [lr, # 8] @ r1 = 'd1' - - @ Optimization for row that have all items except the first set to 0 - @ (this works as the DCTELEMS are always 4-byte aligned) - ldr r5, [lr, # 0] - ldr r2, [lr, # 4] - ldr r3, [lr, # 8] - ldr r4, [lr, #12] - orr r3, r3, r4 - orr r3, r3, r2 - orrs r5, r3, r5 - beq end_of_row_loop @ nothing to be done as ALL of them are '0' - orrs r2, r3, r1 - beq empty_row - - ldrsh r2, [lr, # 2] @ r2 = 'd2' - ldrsh r4, [lr, # 4] @ r4 = 'd4' - ldrsh r6, [lr, # 6] @ r6 = 'd6' - - ldr r3, [r11, #FIX_0_541196100_ID] - add r7, r2, r6 - ldr r5, [r11, #FIX_M_1_847759065_ID] - mul r7, r3, r7 @ r7 = z1 - ldr r3, [r11, #FIX_0_765366865_ID] - mla r6, r5, r6, r7 @ r6 = tmp2 - add r5, r0, r4 @ r5 = tmp0 - mla r2, r3, r2, r7 @ r2 = tmp3 - sub r3, r0, r4 @ r3 = tmp1 - - add r0, r2, r5, lsl #13 @ r0 = tmp10 - rsb r2, r2, r5, lsl #13 @ r2 = tmp13 - add r4, r6, r3, lsl #13 @ r4 = tmp11 - rsb r3, r6, r3, lsl #13 @ r3 = tmp12 - - stmdb sp!, { r0, r2, r3, r4 } @ save on the stack tmp10, tmp13, tmp12, tmp11 - - ldrsh r3, [lr, #10] @ r3 = 'd3' - ldrsh r5, [lr, #12] @ r5 = 'd5' - ldrsh r7, [lr, #14] @ r7 = 'd7' - - add r0, r3, r5 @ r0 = 'z2' - add r2, r1, r7 @ r2 = 'z1' - add r4, r3, r7 @ r4 = 'z3' - add r6, r1, r5 @ r6 = 'z4' - ldr r9, [r11, #FIX_1_175875602_ID] - add r8, r4, r6 @ r8 = z3 + z4 - ldr r10, [r11, #FIX_M_0_899976223_ID] - mul r8, r9, r8 @ r8 = 'z5' - ldr r9, [r11, #FIX_M_2_562915447_ID] - mul r2, r10, r2 @ r2 = 'z1' - ldr r10, [r11, #FIX_M_1_961570560_ID] - mul r0, r9, r0 @ r0 = 'z2' - ldr r9, [r11, #FIX_M_0_390180644_ID] - mla r4, r10, r4, r8 @ r4 = 'z3' - ldr r10, [r11, #FIX_0_298631336_ID] - mla r6, r9, r6, r8 @ r6 = 'z4' - ldr r9, [r11, #FIX_2_053119869_ID] - mla r7, r10, r7, r2 @ r7 = tmp0 + z1 - ldr r10, [r11, #FIX_3_072711026_ID] - mla r5, r9, r5, r0 @ r5 = tmp1 + z2 - ldr r9, [r11, #FIX_1_501321110_ID] - mla r3, r10, r3, r0 @ r3 = tmp2 + z2 - add r7, r7, r4 @ r7 = tmp0 - mla r1, r9, r1, r2 @ r1 = tmp3 + z1 - add r5, r5, r6 @ r5 = tmp1 - add r3, r3, r4 @ r3 = tmp2 - add r1, r1, r6 @ r1 = tmp3 - - ldmia sp!, { r0, r2, r4, r6 } @ r0 = tmp10 / r2 = tmp13 / r4 = tmp12 / r6 = tmp11 - @ r1 = tmp3 / r3 = tmp2 / r5 = tmp1 / r7 = tmp0 - - @ Compute DESCALE(tmp10 + tmp3, CONST_BITS-PASS1_BITS) - add r8, r0, r1 - add r8, r8, #(1<<10) - mov r8, r8, asr #11 - strh r8, [lr, # 0] - - @ Compute DESCALE(tmp10 - tmp3, CONST_BITS-PASS1_BITS) - sub r8, r0, r1 - add r8, r8, #(1<<10) - mov r8, r8, asr #11 - strh r8, [lr, #14] - - @ Compute DESCALE(tmp11 + tmp2, CONST_BITS-PASS1_BITS) - add r8, r6, r3 - add r8, r8, #(1<<10) - mov r8, r8, asr #11 - strh r8, [lr, # 2] - - @ Compute DESCALE(tmp11 - tmp2, CONST_BITS-PASS1_BITS) - sub r8, r6, r3 - add r8, r8, #(1<<10) - mov r8, r8, asr #11 - strh r8, [lr, #12] - - @ Compute DESCALE(tmp12 + tmp1, CONST_BITS-PASS1_BITS) - add r8, r4, r5 - add r8, r8, #(1<<10) - mov r8, r8, asr #11 - strh r8, [lr, # 4] - - @ Compute DESCALE(tmp12 - tmp1, CONST_BITS-PASS1_BITS) - sub r8, r4, r5 - add r8, r8, #(1<<10) - mov r8, r8, asr #11 - strh r8, [lr, #10] - - @ Compute DESCALE(tmp13 + tmp0, CONST_BITS-PASS1_BITS) - add r8, r2, r7 - add r8, r8, #(1<<10) - mov r8, r8, asr #11 - strh r8, [lr, # 6] - - @ Compute DESCALE(tmp13 - tmp0, CONST_BITS-PASS1_BITS) - sub r8, r2, r7 - add r8, r8, #(1<<10) - mov r8, r8, asr #11 - strh r8, [lr, # 8] - - @ End of row loop - add lr, lr, #16 - subs r12, r12, #1 - bne row_loop - beq start_column_loop - -empty_row: - ldr r1, [r11, #FIX_0xFFFF_ID] - mov r0, r0, lsl #2 - and r0, r0, r1 - add r0, r0, r0, lsl #16 - str r0, [lr, # 0] - str r0, [lr, # 4] - str r0, [lr, # 8] - str r0, [lr, #12] - -end_of_row_loop: - @ End of loop - add lr, lr, #16 - subs r12, r12, #1 - bne row_loop - -start_column_loop: - @ Start of column loop - ldr lr, [ sp ] - mov r12, #8 -column_loop: - ldrsh r0, [lr, #( 0*8)] @ r0 = 'd0' - ldrsh r2, [lr, #( 4*8)] @ r2 = 'd2' - ldrsh r4, [lr, #( 8*8)] @ r4 = 'd4' - ldrsh r6, [lr, #(12*8)] @ r6 = 'd6' - - ldr r3, [r11, #FIX_0_541196100_ID] - add r1, r2, r6 - ldr r5, [r11, #FIX_M_1_847759065_ID] - mul r1, r3, r1 @ r1 = z1 - ldr r3, [r11, #FIX_0_765366865_ID] - mla r6, r5, r6, r1 @ r6 = tmp2 - add r5, r0, r4 @ r5 = tmp0 - mla r2, r3, r2, r1 @ r2 = tmp3 - sub r3, r0, r4 @ r3 = tmp1 - - add r0, r2, r5, lsl #13 @ r0 = tmp10 - rsb r2, r2, r5, lsl #13 @ r2 = tmp13 - add r4, r6, r3, lsl #13 @ r4 = tmp11 - rsb r6, r6, r3, lsl #13 @ r6 = tmp12 - - ldrsh r1, [lr, #( 2*8)] @ r1 = 'd1' - ldrsh r3, [lr, #( 6*8)] @ r3 = 'd3' - ldrsh r5, [lr, #(10*8)] @ r5 = 'd5' - ldrsh r7, [lr, #(14*8)] @ r7 = 'd7' - - @ Check for empty odd column (happens about 20 to 25 % of the time according to my stats) - orr r9, r1, r3 - orr r10, r5, r7 - orrs r10, r9, r10 - beq empty_odd_column - - stmdb sp!, { r0, r2, r4, r6 } @ save on the stack tmp10, tmp13, tmp12, tmp11 - - add r0, r3, r5 @ r0 = 'z2' - add r2, r1, r7 @ r2 = 'z1' - add r4, r3, r7 @ r4 = 'z3' - add r6, r1, r5 @ r6 = 'z4' - ldr r9, [r11, #FIX_1_175875602_ID] - add r8, r4, r6 - ldr r10, [r11, #FIX_M_0_899976223_ID] - mul r8, r9, r8 @ r8 = 'z5' - ldr r9, [r11, #FIX_M_2_562915447_ID] - mul r2, r10, r2 @ r2 = 'z1' - ldr r10, [r11, #FIX_M_1_961570560_ID] - mul r0, r9, r0 @ r0 = 'z2' - ldr r9, [r11, #FIX_M_0_390180644_ID] - mla r4, r10, r4, r8 @ r4 = 'z3' - ldr r10, [r11, #FIX_0_298631336_ID] - mla r6, r9, r6, r8 @ r6 = 'z4' - ldr r9, [r11, #FIX_2_053119869_ID] - mla r7, r10, r7, r2 @ r7 = tmp0 + z1 - ldr r10, [r11, #FIX_3_072711026_ID] - mla r5, r9, r5, r0 @ r5 = tmp1 + z2 - ldr r9, [r11, #FIX_1_501321110_ID] - mla r3, r10, r3, r0 @ r3 = tmp2 + z2 - add r7, r7, r4 @ r7 = tmp0 - mla r1, r9, r1, r2 @ r1 = tmp3 + z1 - add r5, r5, r6 @ r5 = tmp1 - add r3, r3, r4 @ r3 = tmp2 - add r1, r1, r6 @ r1 = tmp3 - - ldmia sp!, { r0, r2, r4, r6 } @ r0 = tmp10 / r2 = tmp13 / r4 = tmp11 / r6 = tmp12 - @ r1 = tmp3 / r3 = tmp2 / r5 = tmp1 / r7 = tmp0 - - @ Compute DESCALE(tmp10 + tmp3, CONST_BITS+PASS1_BITS+3) - add r8, r0, r1 - add r8, r8, #(1<<17) - mov r8, r8, asr #18 - strh r8, [lr, #( 0*8)] - - @ Compute DESCALE(tmp10 - tmp3, CONST_BITS+PASS1_BITS+3) - sub r8, r0, r1 - add r8, r8, #(1<<17) - mov r8, r8, asr #18 - strh r8, [lr, #(14*8)] - - @ Compute DESCALE(tmp11 + tmp2, CONST_BITS+PASS1_BITS+3) - add r8, r4, r3 - add r8, r8, #(1<<17) - mov r8, r8, asr #18 - strh r8, [lr, #( 2*8)] - - @ Compute DESCALE(tmp11 - tmp2, CONST_BITS+PASS1_BITS+3) - sub r8, r4, r3 - add r8, r8, #(1<<17) - mov r8, r8, asr #18 - strh r8, [lr, #(12*8)] - - @ Compute DESCALE(tmp12 + tmp1, CONST_BITS+PASS1_BITS+3) - add r8, r6, r5 - add r8, r8, #(1<<17) - mov r8, r8, asr #18 - strh r8, [lr, #( 4*8)] - - @ Compute DESCALE(tmp12 - tmp1, CONST_BITS+PASS1_BITS+3) - sub r8, r6, r5 - add r8, r8, #(1<<17) - mov r8, r8, asr #18 - strh r8, [lr, #(10*8)] - - @ Compute DESCALE(tmp13 + tmp0, CONST_BITS+PASS1_BITS+3) - add r8, r2, r7 - add r8, r8, #(1<<17) - mov r8, r8, asr #18 - strh r8, [lr, #( 6*8)] - - @ Compute DESCALE(tmp13 - tmp0, CONST_BITS+PASS1_BITS+3) - sub r8, r2, r7 - add r8, r8, #(1<<17) - mov r8, r8, asr #18 - strh r8, [lr, #( 8*8)] - - @ End of row loop - add lr, lr, #2 - subs r12, r12, #1 - bne column_loop - beq the_end - -empty_odd_column: - @ Compute DESCALE(tmp10 + tmp3, CONST_BITS+PASS1_BITS+3) - @ Compute DESCALE(tmp10 - tmp3, CONST_BITS+PASS1_BITS+3) - add r0, r0, #(1<<17) - mov r0, r0, asr #18 - strh r0, [lr, #( 0*8)] - strh r0, [lr, #(14*8)] - - @ Compute DESCALE(tmp11 + tmp2, CONST_BITS+PASS1_BITS+3) - @ Compute DESCALE(tmp11 - tmp2, CONST_BITS+PASS1_BITS+3) - add r4, r4, #(1<<17) - mov r4, r4, asr #18 - strh r4, [lr, #( 2*8)] - strh r4, [lr, #(12*8)] - - @ Compute DESCALE(tmp12 + tmp1, CONST_BITS+PASS1_BITS+3) - @ Compute DESCALE(tmp12 - tmp1, CONST_BITS+PASS1_BITS+3) - add r6, r6, #(1<<17) - mov r6, r6, asr #18 - strh r6, [lr, #( 4*8)] - strh r6, [lr, #(10*8)] - - @ Compute DESCALE(tmp13 + tmp0, CONST_BITS+PASS1_BITS+3) - @ Compute DESCALE(tmp13 - tmp0, CONST_BITS+PASS1_BITS+3) - add r2, r2, #(1<<17) - mov r2, r2, asr #18 - strh r2, [lr, #( 6*8)] - strh r2, [lr, #( 8*8)] - - @ End of row loop - add lr, lr, #2 - subs r12, r12, #1 - bne column_loop - -the_end: - @ The end.... - add sp, sp, #4 - ldmia sp!, { r4 - r12, pc } @ restore callee saved regs and return - -const_array: - .align - .word FIX_0_298631336 - .word FIX_0_541196100 - .word FIX_0_765366865 - .word FIX_1_175875602 - .word FIX_1_501321110 - .word FIX_2_053119869 - .word FIX_3_072711026 - .word FIX_M_0_390180644 - .word FIX_M_0_899976223 - .word FIX_M_1_847759065 - .word FIX_M_1_961570560 - .word FIX_M_2_562915447 - .word FIX_0xFFFF |