kopia lustrzana https://github.com/Wren6991/PicoDVI
Make fullres encode routines less copy/pastey
Luke Wren
rodzic
a607ff5afa
commit
674dbfec83
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@ -378,6 +378,21 @@ tmds_2bpp_table:
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// much better, and many monitors will still accept the signals as long as you
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// DC couple your DVI signals.
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.macro tmds_fullres_encode_loop_body ra rb
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str \ra, [r2, #ACCUM0_OFFS + INTERP1]
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str \ra, [r2, #ACCUM0_OFFS]
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ldr \ra, [r2, #PEEK2_OFFS]
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ldr \ra, [\ra]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str \ra, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr \rb, [r2, #PEEK2_OFFS + INTERP1]
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ldr \rb, [\rb]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str \rb, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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.endm
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// r0: Input buffer (word-aligned)
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// r1: Output buffer (word-aligned)
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// r2: Pixel count
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@ -396,7 +411,7 @@ tmds_2bpp_table:
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movs r4, #0
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str r4, [r2, #ACCUM1_OFFS]
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#if TMDS_FULLRES_NO_DC_BALANCE
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// Alternate parity between odd/even symbols if there's no balance feedback
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// Alternate parity between odd/even symbols if no feedback
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mvns r4, r4
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#endif
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str r4, [r2, #ACCUM1_OFFS + INTERP1]
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@ -410,32 +425,8 @@ tmds_2bpp_table:
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1:
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.rept 16
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ldmia r0!, {r4, r6}
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str r4, [r2, #ACCUM0_OFFS + INTERP1]
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str r4, [r2, #ACCUM0_OFFS]
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ldr r4, [r2, #PEEK2_OFFS]
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ldr r4, [r4]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r4, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr r5, [r2, #PEEK2_OFFS + INTERP1]
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ldr r5, [r5]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r5, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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str r6, [r2, #ACCUM0_OFFS + INTERP1]
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str r6, [r2, #ACCUM0_OFFS]
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ldr r6, [r2, #PEEK2_OFFS]
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ldr r6, [r6]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r6, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr r7, [r2, #PEEK2_OFFS + INTERP1]
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ldr r7, [r7]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r7, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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tmds_fullres_encode_loop_body r4 r5
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tmds_fullres_encode_loop_body r6 r7
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stmia r1!, {r4, r5, r6, r7}
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.endr
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2:
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@ -455,6 +446,23 @@ decl_func_y tmds_fullres_encode_loop_16bpp_y
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tmds_fullres_encode_loop_16bpp
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.macro tmds_fullres_encode_loop_body_leftshift ra rb
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// Note we apply the leftshift for INTERP0 only
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str \ra, [r2, #ACCUM0_OFFS + INTERP1]
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lsls \ra, r3
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str \ra, [r2, #ACCUM0_OFFS]
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ldr \ra, [r2, #PEEK2_OFFS]
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ldr \ra, [\ra]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str \ra, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr \rb, [r2, #PEEK2_OFFS + INTERP1]
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ldr \rb, [\rb]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str \rb, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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.endm
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// r0: Input buffer (word-aligned)
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// r1: Output buffer (word-aligned)
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// r2: Pixel count
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@ -487,35 +495,8 @@ decl_func_y tmds_fullres_encode_loop_16bpp_y
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1:
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.rept 16 // 64 pixels per iteration
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ldmia r0!, {r4, r6}
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// Note we apply the leftshift for INTERP0 only
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str r4, [r2, #ACCUM0_OFFS + INTERP1]
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lsls r4, r3
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str r4, [r2, #ACCUM0_OFFS]
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ldr r4, [r2, #PEEK2_OFFS]
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ldr r4, [r4]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r4, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr r5, [r2, #PEEK2_OFFS + INTERP1]
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ldr r5, [r5]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r5, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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str r6, [r2, #ACCUM0_OFFS + INTERP1]
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lsls r6, r3
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str r6, [r2, #ACCUM0_OFFS]
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ldr r6, [r2, #PEEK2_OFFS]
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ldr r6, [r6]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r6, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr r7, [r2, #PEEK2_OFFS + INTERP1]
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ldr r7, [r7]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r7, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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tmds_fullres_encode_loop_body_leftshift r4 r5
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tmds_fullres_encode_loop_body_leftshift r6 r7
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stmia r1!, {r4, r5, r6, r7}
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.endr
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2:
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@ -535,11 +516,33 @@ decl_func_y tmds_fullres_encode_loop_16bpp_leftshift_y
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tmds_fullres_encode_loop_16bpp_leftshift
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// ----------------------------------------------------------------------------
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// Full-resolution 8bpp paletted encode
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// Variant of tmds_fullres_encode_loop_16bpp that reads
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// 8-bit wide pixels packed 4 per word. The interpolator
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// base is set to a reordered list of TMDS symbols based
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// on a user colour palette.
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// Two pixels input in rd[17:2]. Two symbols output in rd[19:0]. r2 contains
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// interp base pointer. r7 used as temporary.
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.macro tmds_palette_encode_loop_body rd
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str \rd, [r2, #ACCUM0_OFFS]
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str \rd, [r2, #ACCUM0_OFFS + INTERP1]
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ldr \rd, [r2, #PEEK2_OFFS]
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ldr \rd, [\rd]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str \rd, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr r7, [r2, #PEEK2_OFFS + INTERP1]
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ldr r7, [r7]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r7, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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lsls r7, #10
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orrs \rd, r7
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.endm
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.macro tmds_palette_encode_loop
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push {r4-r7, lr}
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mov r4, r8
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@ -572,66 +575,10 @@ decl_func_y tmds_fullres_encode_loop_16bpp_leftshift_y
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lsls r3, #2
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lsrs r6, r5, #14
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lsls r5, #2
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str r3, [r2, #ACCUM0_OFFS + INTERP1]
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str r3, [r2, #ACCUM0_OFFS]
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ldr r3, [r2, #PEEK2_OFFS]
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ldr r3, [r3]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r3, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr r7, [r2, #PEEK2_OFFS + INTERP1]
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ldr r7, [r7]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r7, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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lsls r7, #10
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orrs r3, r7
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str r4, [r2, #ACCUM0_OFFS + INTERP1]
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str r4, [r2, #ACCUM0_OFFS]
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ldr r4, [r2, #PEEK2_OFFS]
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ldr r4, [r4]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r4, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr r7, [r2, #PEEK2_OFFS + INTERP1]
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ldr r7, [r7]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r7, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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lsls r7, #10
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orrs r4, r7
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str r5, [r2, #ACCUM0_OFFS + INTERP1]
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str r5, [r2, #ACCUM0_OFFS]
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ldr r5, [r2, #PEEK2_OFFS]
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ldr r5, [r5]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r5, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr r7, [r2, #PEEK2_OFFS + INTERP1]
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ldr r7, [r7]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r7, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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lsls r7, #10
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orrs r5, r7
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str r6, [r2, #ACCUM0_OFFS + INTERP1]
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str r6, [r2, #ACCUM0_OFFS]
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ldr r6, [r2, #PEEK2_OFFS]
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ldr r6, [r6]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r6, [r2, #ACCUM1_ADD_OFFS]
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#endif
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ldr r7, [r2, #PEEK2_OFFS + INTERP1]
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ldr r7, [r7]
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#if !TMDS_FULLRES_NO_DC_BALANCE
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str r7, [r2, #ACCUM1_ADD_OFFS + INTERP1]
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#endif
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lsls r7, #10
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orrs r6, r7
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tmds_palette_encode_loop_body r3
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tmds_palette_encode_loop_body r4
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tmds_palette_encode_loop_body r5
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tmds_palette_encode_loop_body r6
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stmia r1!, {r3, r4, r5, r6}
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.endr
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2:
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