diff options
author | Keith Whitwell <keithw@vmware.com> | 2009-12-22 09:40:39 +0000 |
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committer | Keith Whitwell <keithw@vmware.com> | 2009-12-22 09:40:39 +0000 |
commit | aa02683e45f1eaf61bba2ba7eeda7686efeed2ca (patch) | |
tree | 63e0ef2fa85e5d7ebd6ffc6ae9043ce0819251a2 /src/gallium/drivers/i965/brw_wm_pass1.c | |
parent | ebbc73d1aed283c9bc4aa2b37bed4374bbaec5b5 (diff) | |
parent | 0fc4dd3819af252c028ed43bbd668b4f34104e32 (diff) |
Merge branch 'i965g-restart'
Conflicts:
configure.ac
Diffstat (limited to 'src/gallium/drivers/i965/brw_wm_pass1.c')
-rw-r--r-- | src/gallium/drivers/i965/brw_wm_pass1.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/brw_wm_pass1.c b/src/gallium/drivers/i965/brw_wm_pass1.c new file mode 100644 index 0000000000..005747f00b --- /dev/null +++ b/src/gallium/drivers/i965/brw_wm_pass1.c @@ -0,0 +1,292 @@ +/* + Copyright (C) Intel Corp. 2006. All Rights Reserved. + Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to + develop this 3D driver. + + 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 (including the + next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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. + + **********************************************************************/ + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + */ + + +#include "brw_wm.h" +#include "brw_debug.h" + + +static GLuint get_tracked_mask(struct brw_wm_compile *c, + struct brw_wm_instruction *inst) +{ + GLuint i; + for (i = 0; i < 4; i++) { + if (inst->writemask & (1<<i)) { + if (!inst->dst[i]->contributes_to_output) { + inst->writemask &= ~(1<<i); + inst->dst[i] = 0; + } + } + } + + return inst->writemask; +} + +/* Remove a reference from a value's usage chain. + */ +static void unlink_ref(struct brw_wm_ref *ref) +{ + struct brw_wm_value *value = ref->value; + + if (ref == value->lastuse) { + value->lastuse = ref->prevuse; + } + else { + struct brw_wm_ref *i = value->lastuse; + while (i->prevuse != ref) i = i->prevuse; + i->prevuse = ref->prevuse; + } +} + +static void track_arg(struct brw_wm_compile *c, + struct brw_wm_instruction *inst, + GLuint arg, + GLuint readmask) +{ + GLuint i; + + for (i = 0; i < 4; i++) { + struct brw_wm_ref *ref = inst->src[arg][i]; + if (ref) { + if (readmask & (1<<i)) { + ref->value->contributes_to_output = 1; + } + else { + unlink_ref(ref); + inst->src[arg][i] = NULL; + } + } + } +} + +static GLuint get_texcoord_mask( GLuint tex_idx ) +{ + switch (tex_idx) { + case TGSI_TEXTURE_1D: + return BRW_WRITEMASK_X; + case TGSI_TEXTURE_2D: + case TGSI_TEXTURE_RECT: + return BRW_WRITEMASK_XY; + case TGSI_TEXTURE_3D: + return BRW_WRITEMASK_XYZ; + case TGSI_TEXTURE_CUBE: + return BRW_WRITEMASK_XYZ; + + case TGSI_TEXTURE_SHADOW1D: + return BRW_WRITEMASK_XZ; + case TGSI_TEXTURE_SHADOW2D: + case TGSI_TEXTURE_SHADOWRECT: + return BRW_WRITEMASK_XYZ; + default: + assert(0); + return 0; + } +} + + +/* Step two: Basically this is dead code elimination. + * + * Iterate backwards over instructions, noting which values + * contribute to the final result. Adjust writemasks to only + * calculate these values. + */ +void brw_wm_pass1( struct brw_wm_compile *c ) +{ + GLint insn; + + for (insn = c->nr_insns-1; insn >= 0; insn--) { + struct brw_wm_instruction *inst = &c->instruction[insn]; + GLuint writemask; + GLuint read0, read1, read2; + + if (inst->opcode == TGSI_OPCODE_KIL) { + track_arg(c, inst, 0, BRW_WRITEMASK_XYZW); /* All args contribute to final */ + continue; + } + + if (inst->opcode == WM_FB_WRITE) { + track_arg(c, inst, 0, BRW_WRITEMASK_XYZW); + track_arg(c, inst, 1, BRW_WRITEMASK_XYZW); + if (c->key.source_depth_to_render_target && + c->key.computes_depth) + track_arg(c, inst, 2, BRW_WRITEMASK_Z); + else + track_arg(c, inst, 2, 0); + continue; + } + + /* Lookup all the registers which were written by this + * instruction and get a mask of those that contribute to the output: + */ + writemask = get_tracked_mask(c, inst); + if (!writemask) { + GLuint arg; + for (arg = 0; arg < 3; arg++) + track_arg(c, inst, arg, 0); + continue; + } + + read0 = 0; + read1 = 0; + read2 = 0; + + /* Mark all inputs which contribute to the marked outputs: + */ + switch (inst->opcode) { + case TGSI_OPCODE_ABS: + case TGSI_OPCODE_FLR: + case TGSI_OPCODE_FRC: + case TGSI_OPCODE_MOV: + case TGSI_OPCODE_TRUNC: + read0 = writemask; + break; + + case TGSI_OPCODE_SUB: + case TGSI_OPCODE_SLT: + case TGSI_OPCODE_SLE: + case TGSI_OPCODE_SGE: + case TGSI_OPCODE_SGT: + case TGSI_OPCODE_SEQ: + case TGSI_OPCODE_SNE: + case TGSI_OPCODE_ADD: + case TGSI_OPCODE_MAX: + case TGSI_OPCODE_MIN: + case TGSI_OPCODE_MUL: + read0 = writemask; + read1 = writemask; + break; + + case TGSI_OPCODE_DDX: + case TGSI_OPCODE_DDY: + read0 = writemask; + break; + + case TGSI_OPCODE_MAD: + case TGSI_OPCODE_CMP: + case TGSI_OPCODE_LRP: + read0 = writemask; + read1 = writemask; + read2 = writemask; + break; + + case TGSI_OPCODE_XPD: + if (writemask & BRW_WRITEMASK_X) read0 |= BRW_WRITEMASK_YZ; + if (writemask & BRW_WRITEMASK_Y) read0 |= BRW_WRITEMASK_XZ; + if (writemask & BRW_WRITEMASK_Z) read0 |= BRW_WRITEMASK_XY; + read1 = read0; + break; + + case TGSI_OPCODE_COS: + case TGSI_OPCODE_EX2: + case TGSI_OPCODE_LG2: + case TGSI_OPCODE_RCP: + case TGSI_OPCODE_RSQ: + case TGSI_OPCODE_SIN: + case TGSI_OPCODE_SCS: + case WM_CINTERP: + case WM_PIXELXY: + read0 = BRW_WRITEMASK_X; + break; + + case TGSI_OPCODE_POW: + read0 = BRW_WRITEMASK_X; + read1 = BRW_WRITEMASK_X; + break; + + case TGSI_OPCODE_TEX: + case TGSI_OPCODE_TXP: + read0 = get_texcoord_mask(inst->target); + break; + + case TGSI_OPCODE_TXB: + read0 = get_texcoord_mask(inst->target) | BRW_WRITEMASK_W; + break; + + case WM_WPOSXY: + read0 = writemask & BRW_WRITEMASK_XY; + break; + + case WM_DELTAXY: + read0 = writemask & BRW_WRITEMASK_XY; + read1 = BRW_WRITEMASK_X; + break; + + case WM_PIXELW: + read0 = BRW_WRITEMASK_X; + read1 = BRW_WRITEMASK_XY; + break; + + case WM_LINTERP: + read0 = BRW_WRITEMASK_X; + read1 = BRW_WRITEMASK_XY; + break; + + case WM_PINTERP: + read0 = BRW_WRITEMASK_X; /* interpolant */ + read1 = BRW_WRITEMASK_XY; /* deltas */ + read2 = BRW_WRITEMASK_W; /* pixel w */ + break; + + case TGSI_OPCODE_DP3: + read0 = BRW_WRITEMASK_XYZ; + read1 = BRW_WRITEMASK_XYZ; + break; + + case TGSI_OPCODE_DPH: + read0 = BRW_WRITEMASK_XYZ; + read1 = BRW_WRITEMASK_XYZW; + break; + + case TGSI_OPCODE_DP4: + read0 = BRW_WRITEMASK_XYZW; + read1 = BRW_WRITEMASK_XYZW; + break; + + case TGSI_OPCODE_LIT: + read0 = BRW_WRITEMASK_XYW; + break; + + case TGSI_OPCODE_DST: + case WM_FRONTFACING: + case TGSI_OPCODE_KILP: + default: + break; + } + + track_arg(c, inst, 0, read0); + track_arg(c, inst, 1, read1); + track_arg(c, inst, 2, read2); + } + + if (BRW_DEBUG & DEBUG_WM) { + brw_wm_print_program(c, "pass1"); + } +} |