Module: Mesa Branch: master Commit: 7fae97c98bfa13bff0e9da857e86eefdb625584c URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=7fae97c98bfa13bff0e9da857e86eefdb625584c
Author: Paul Berry <stereotype...@gmail.com> Date: Tue Jul 17 21:06:01 2012 -0700 i965/blorp: Encode and decode IMS format for 8x MSAA correctly. This patch updates the blorp functions encode_msaa() and decode_msaa() to properly handle the encoding of IMS MSAA buffers when num_samples=8. Acked-by: Kenneth Graunke <kenn...@whitecape.org> --- src/mesa/drivers/dri/i965/brw_blorp_blit.cpp | 146 +++++++++++++++++++------- 1 files changed, 107 insertions(+), 39 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp index 3051d75..f8b7e4a 100644 --- a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp +++ b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp @@ -343,6 +343,18 @@ enum sampler_message_arg * Y' = (Y & ~0b11) >> 1 | (Y & 0b1) * S = (Y & 0b10) | (X & 0b10) >> 1 * + * For an 8x multisampled surface using INTEL_MSAA_LAYOUT_IMS, encode_msaa() + * embeds the sample number into bits 1 and 2 of the X coordinate and bit 1 of + * the Y coordinate: + * + * encode_msaa(8, IMS, X, Y, S) = (X', Y', 0) + * where X' = (X & ~0b1) << 2 | (S & 0b100) | (S & 0b1) << 1 | (X & 0b1) + * Y' = (Y & ~0b1) << 1 | (S & 0b10) | (Y & 0b1) + * decode_msaa(8, IMS, X, Y, 0) = (X', Y', S) + * where X' = (X & ~0b111) >> 2 | (X & 0b1) + * Y' = (Y & ~0b11) >> 1 | (Y & 0b1) + * S = (X & 0b100) | (Y & 0b10) | (X & 0b10) >> 1 + * * For X tiling, tile() combines together the low-order bits of the X and Y * coordinates in the pattern 0byyyxxxxxxxxx, creating 4k tiles that are 512 * bytes wide and 8 rows high: @@ -969,7 +981,7 @@ brw_blorp_blit_program::translate_tiling(bool old_tiled_w, bool new_tiled_w) * * This code modifies the X and Y coordinates according to the formula: * - * (X', Y', S') = encode_msaa_4x(X, Y, S) + * (X', Y', S') = encode_msaa(num_samples, IMS, X, Y, S) * * (See brw_blorp_blit_program). */ @@ -992,27 +1004,58 @@ brw_blorp_blit_program::encode_msaa(unsigned num_samples, /* No translation necessary. */ break; case INTEL_MSAA_LAYOUT_IMS: - /* encode_msaa(4, IMS, X, Y, S) = (X', Y', 0) - * where X' = (X & ~0b1) << 1 | (S & 0b1) << 1 | (X & 0b1) - * Y' = (Y & ~0b1 ) << 1 | (S & 0b10) | (Y & 0b1) - */ - brw_AND(&func, t1, X, brw_imm_uw(0xfffe)); /* X & ~0b1 */ - if (!s_is_zero) { - brw_AND(&func, t2, S, brw_imm_uw(1)); /* S & 0b1 */ - brw_OR(&func, t1, t1, t2); /* (X & ~0b1) | (S & 0b1) */ - } - brw_SHL(&func, t1, t1, brw_imm_uw(1)); /* (X & ~0b1) << 1 - | (S & 0b1) << 1 */ - brw_AND(&func, t2, X, brw_imm_uw(1)); /* X & 0b1 */ - brw_OR(&func, Xp, t1, t2); - brw_AND(&func, t1, Y, brw_imm_uw(0xfffe)); /* Y & ~0b1 */ - brw_SHL(&func, t1, t1, brw_imm_uw(1)); /* (Y & ~0b1) << 1 */ - if (!s_is_zero) { - brw_AND(&func, t2, S, brw_imm_uw(2)); /* S & 0b10 */ - brw_OR(&func, t1, t1, t2); /* (Y & ~0b1) << 1 | (S & 0b10) */ + switch (num_samples) { + case 4: + /* encode_msaa(4, IMS, X, Y, S) = (X', Y', 0) + * where X' = (X & ~0b1) << 1 | (S & 0b1) << 1 | (X & 0b1) + * Y' = (Y & ~0b1) << 1 | (S & 0b10) | (Y & 0b1) + */ + brw_AND(&func, t1, X, brw_imm_uw(0xfffe)); /* X & ~0b1 */ + if (!s_is_zero) { + brw_AND(&func, t2, S, brw_imm_uw(1)); /* S & 0b1 */ + brw_OR(&func, t1, t1, t2); /* (X & ~0b1) | (S & 0b1) */ + } + brw_SHL(&func, t1, t1, brw_imm_uw(1)); /* (X & ~0b1) << 1 + | (S & 0b1) << 1 */ + brw_AND(&func, t2, X, brw_imm_uw(1)); /* X & 0b1 */ + brw_OR(&func, Xp, t1, t2); + brw_AND(&func, t1, Y, brw_imm_uw(0xfffe)); /* Y & ~0b1 */ + brw_SHL(&func, t1, t1, brw_imm_uw(1)); /* (Y & ~0b1) << 1 */ + if (!s_is_zero) { + brw_AND(&func, t2, S, brw_imm_uw(2)); /* S & 0b10 */ + brw_OR(&func, t1, t1, t2); /* (Y & ~0b1) << 1 | (S & 0b10) */ + } + brw_AND(&func, t2, Y, brw_imm_uw(1)); /* Y & 0b1 */ + brw_OR(&func, Yp, t1, t2); + break; + case 8: + /* encode_msaa(8, IMS, X, Y, S) = (X', Y', 0) + * where X' = (X & ~0b1) << 2 | (S & 0b100) | (S & 0b1) << 1 + * | (X & 0b1) + * Y' = (Y & ~0b1) << 1 | (S & 0b10) | (Y & 0b1) + */ + brw_AND(&func, t1, X, brw_imm_uw(0xfffe)); /* X & ~0b1 */ + brw_SHL(&func, t1, t1, brw_imm_uw(2)); /* (X & ~0b1) << 2 */ + if (!s_is_zero) { + brw_AND(&func, t2, S, brw_imm_uw(4)); /* S & 0b100 */ + brw_OR(&func, t1, t1, t2); /* (X & ~0b1) << 2 | (S & 0b100) */ + brw_AND(&func, t2, S, brw_imm_uw(1)); /* S & 0b1 */ + brw_SHL(&func, t2, t2, brw_imm_uw(1)); /* (S & 0b1) << 1 */ + brw_OR(&func, t1, t1, t2); /* (X & ~0b1) << 2 | (S & 0b100) + | (S & 0b1) << 1 */ + } + brw_AND(&func, t2, X, brw_imm_uw(1)); /* X & 0b1 */ + brw_OR(&func, Xp, t1, t2); + brw_AND(&func, t1, Y, brw_imm_uw(0xfffe)); /* Y & ~0b1 */ + brw_SHL(&func, t1, t1, brw_imm_uw(1)); /* (Y & ~0b1) << 1 */ + if (!s_is_zero) { + brw_AND(&func, t2, S, brw_imm_uw(2)); /* S & 0b10 */ + brw_OR(&func, t1, t1, t2); /* (Y & ~0b1) << 1 | (S & 0b10) */ + } + brw_AND(&func, t2, Y, brw_imm_uw(1)); /* Y & 0b1 */ + brw_OR(&func, Yp, t1, t2); + break; } - brw_AND(&func, t2, Y, brw_imm_uw(1)); - brw_OR(&func, Yp, t1, t2); SWAP_XY_AND_XPYP(); s_is_zero = true; break; @@ -1025,7 +1068,7 @@ brw_blorp_blit_program::encode_msaa(unsigned num_samples, * * This code modifies the X and Y coordinates according to the formula: * - * (X', Y', S) = decode_msaa(num_samples, X, Y, S) + * (X', Y', S) = decode_msaa(num_samples, IMS, X, Y, S) * * (See brw_blorp_blit_program). */ @@ -1048,24 +1091,49 @@ brw_blorp_blit_program::decode_msaa(unsigned num_samples, /* No translation necessary. */ break; case INTEL_MSAA_LAYOUT_IMS: - /* decode_msaa(4, IMS, X, Y, 0) = (X', Y', S) - * where X' = (X & ~0b11) >> 1 | (X & 0b1) - * Y' = (Y & ~0b11) >> 1 | (Y & 0b1) - * S = (Y & 0b10) | (X & 0b10) >> 1 - */ assert(s_is_zero); - brw_AND(&func, t1, X, brw_imm_uw(0xfffc)); /* X & ~0b11 */ - brw_SHR(&func, t1, t1, brw_imm_uw(1)); /* (X & ~0b11) >> 1 */ - brw_AND(&func, t2, X, brw_imm_uw(1)); /* X & 0b1 */ - brw_OR(&func, Xp, t1, t2); - brw_AND(&func, t1, Y, brw_imm_uw(0xfffc)); /* Y & ~0b11 */ - brw_SHR(&func, t1, t1, brw_imm_uw(1)); /* (Y & ~0b11) >> 1 */ - brw_AND(&func, t2, Y, brw_imm_uw(1)); /* Y & 0b1 */ - brw_OR(&func, Yp, t1, t2); - brw_AND(&func, t1, Y, brw_imm_uw(2)); /* Y & 0b10 */ - brw_AND(&func, t2, X, brw_imm_uw(2)); /* X & 0b10 */ - brw_SHR(&func, t2, t2, brw_imm_uw(1)); /* (X & 0b10) >> 1 */ - brw_OR(&func, S, t1, t2); + switch (num_samples) { + case 4: + /* decode_msaa(4, IMS, X, Y, 0) = (X', Y', S) + * where X' = (X & ~0b11) >> 1 | (X & 0b1) + * Y' = (Y & ~0b11) >> 1 | (Y & 0b1) + * S = (Y & 0b10) | (X & 0b10) >> 1 + */ + brw_AND(&func, t1, X, brw_imm_uw(0xfffc)); /* X & ~0b11 */ + brw_SHR(&func, t1, t1, brw_imm_uw(1)); /* (X & ~0b11) >> 1 */ + brw_AND(&func, t2, X, brw_imm_uw(1)); /* X & 0b1 */ + brw_OR(&func, Xp, t1, t2); + brw_AND(&func, t1, Y, brw_imm_uw(0xfffc)); /* Y & ~0b11 */ + brw_SHR(&func, t1, t1, brw_imm_uw(1)); /* (Y & ~0b11) >> 1 */ + brw_AND(&func, t2, Y, brw_imm_uw(1)); /* Y & 0b1 */ + brw_OR(&func, Yp, t1, t2); + brw_AND(&func, t1, Y, brw_imm_uw(2)); /* Y & 0b10 */ + brw_AND(&func, t2, X, brw_imm_uw(2)); /* X & 0b10 */ + brw_SHR(&func, t2, t2, brw_imm_uw(1)); /* (X & 0b10) >> 1 */ + brw_OR(&func, S, t1, t2); + break; + case 8: + /* decode_msaa(8, IMS, X, Y, 0) = (X', Y', S) + * where X' = (X & ~0b111) >> 2 | (X & 0b1) + * Y' = (Y & ~0b11) >> 1 | (Y & 0b1) + * S = (X & 0b100) | (Y & 0b10) | (X & 0b10) >> 1 + */ + brw_AND(&func, t1, X, brw_imm_uw(0xfff8)); /* X & ~0b111 */ + brw_SHR(&func, t1, t1, brw_imm_uw(2)); /* (X & ~0b111) >> 2 */ + brw_AND(&func, t2, X, brw_imm_uw(1)); /* X & 0b1 */ + brw_OR(&func, Xp, t1, t2); + brw_AND(&func, t1, Y, brw_imm_uw(0xfffc)); /* Y & ~0b11 */ + brw_SHR(&func, t1, t1, brw_imm_uw(1)); /* (Y & ~0b11) >> 1 */ + brw_AND(&func, t2, Y, brw_imm_uw(1)); /* Y & 0b1 */ + brw_OR(&func, Yp, t1, t2); + brw_AND(&func, t1, X, brw_imm_uw(4)); /* X & 0b100 */ + brw_AND(&func, t2, Y, brw_imm_uw(2)); /* Y & 0b10 */ + brw_OR(&func, t1, t1, t2); /* (X & 0b100) | (Y & 0b10) */ + brw_AND(&func, t2, X, brw_imm_uw(2)); /* X & 0b10 */ + brw_SHR(&func, t2, t2, brw_imm_uw(1)); /* (X & 0b10) >> 1 */ + brw_OR(&func, S, t1, t2); + break; + } s_is_zero = false; SWAP_XY_AND_XPYP(); break; _______________________________________________ mesa-commit mailing list mesa-commit@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-commit