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Diffstat (limited to 'libpixelflinger/codeflinger/GGLAssembler.cpp')
| -rw-r--r-- | libpixelflinger/codeflinger/GGLAssembler.cpp | 1150 |
1 files changed, 1150 insertions, 0 deletions
diff --git a/libpixelflinger/codeflinger/GGLAssembler.cpp b/libpixelflinger/codeflinger/GGLAssembler.cpp new file mode 100644 index 0000000..1cd189c --- /dev/null +++ b/libpixelflinger/codeflinger/GGLAssembler.cpp @@ -0,0 +1,1150 @@ +/* libs/pixelflinger/codeflinger/GGLAssembler.cpp +** +** Copyright 2006, The Android Open Source Project +** +** Licensed under the Apache License, Version 2.0 (the "License"); +** you may not use this file except in compliance with the License. +** You may obtain a copy of the License at +** +** http://www.apache.org/licenses/LICENSE-2.0 +** +** Unless required by applicable law or agreed to in writing, software +** distributed under the License is distributed on an "AS IS" BASIS, +** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +** See the License for the specific language governing permissions and +** limitations under the License. +*/ + +#define LOG_TAG "GGLAssembler" + +#include <assert.h> +#include <stdint.h> +#include <stdlib.h> +#include <stdio.h> +#include <sys/types.h> +#include <cutils/log.h> + +#include "codeflinger/GGLAssembler.h" + +namespace android { + +// ---------------------------------------------------------------------------- + +GGLAssembler::GGLAssembler(ARMAssemblerInterface* target) + : ARMAssemblerProxy(target), RegisterAllocator(), mOptLevel(7) +{ +} + +GGLAssembler::~GGLAssembler() +{ +} + +void GGLAssembler::prolog() +{ + ARMAssemblerProxy::prolog(); +} + +void GGLAssembler::epilog(uint32_t touched) +{ + ARMAssemblerProxy::epilog(touched); +} + +void GGLAssembler::reset(int opt_level) +{ + ARMAssemblerProxy::reset(); + RegisterAllocator::reset(); + mOptLevel = opt_level; +} + +// --------------------------------------------------------------------------- + +int GGLAssembler::scanline(const needs_t& needs, context_t const* c) +{ + int err = 0; + int opt_level = mOptLevel; + while (opt_level >= 0) { + reset(opt_level); + err = scanline_core(needs, c); + if (err == 0) + break; + opt_level--; + } + + // XXX: in theory, pcForLabel is not valid before generate() + uint32_t* fragment_start_pc = pcForLabel("fragment_loop"); + uint32_t* fragment_end_pc = pcForLabel("epilog"); + const int per_fragment_ops = int(fragment_end_pc - fragment_start_pc); + + // build a name for our pipeline + char name[64]; + sprintf(name, + "scanline__%08X:%08X_%08X_%08X [%3d ipp]", + needs.p, needs.n, needs.t[0], needs.t[1], per_fragment_ops); + + if (err) { + LOGE("Error while generating ""%s""\n", name); + disassemble(name); + return -1; + } + + return generate(name); +} + +int GGLAssembler::scanline_core(const needs_t& needs, context_t const* c) +{ + int64_t duration = ggl_system_time(); + + mBlendFactorCached = 0; + mBlending = 0; + mMasking = 0; + mAA = GGL_READ_NEEDS(P_AA, needs.p); + mDithering = GGL_READ_NEEDS(P_DITHER, needs.p); + mAlphaTest = GGL_READ_NEEDS(P_ALPHA_TEST, needs.p) + GGL_NEVER; + mDepthTest = GGL_READ_NEEDS(P_DEPTH_TEST, needs.p) + GGL_NEVER; + mFog = GGL_READ_NEEDS(P_FOG, needs.p) != 0; + mSmooth = GGL_READ_NEEDS(SHADE, needs.n) != 0; + mBuilderContext.needs = needs; + mBuilderContext.c = c; + mBuilderContext.Rctx = reserveReg(R0); // context always in R0 + mCbFormat = c->formats[ GGL_READ_NEEDS(CB_FORMAT, needs.n) ]; + + // ------------------------------------------------------------------------ + + decodeLogicOpNeeds(needs); + + decodeTMUNeeds(needs, c); + + mBlendSrc = ggl_needs_to_blendfactor(GGL_READ_NEEDS(BLEND_SRC, needs.n)); + mBlendDst = ggl_needs_to_blendfactor(GGL_READ_NEEDS(BLEND_DST, needs.n)); + mBlendSrcA = ggl_needs_to_blendfactor(GGL_READ_NEEDS(BLEND_SRCA, needs.n)); + mBlendDstA = ggl_needs_to_blendfactor(GGL_READ_NEEDS(BLEND_DSTA, needs.n)); + + if (!mCbFormat.c[GGLFormat::ALPHA].h) { + if ((mBlendSrc == GGL_ONE_MINUS_DST_ALPHA) || + (mBlendSrc == GGL_DST_ALPHA)) { + mBlendSrc = GGL_ONE; + } + if ((mBlendSrcA == GGL_ONE_MINUS_DST_ALPHA) || + (mBlendSrcA == GGL_DST_ALPHA)) { + mBlendSrcA = GGL_ONE; + } + if ((mBlendDst == GGL_ONE_MINUS_DST_ALPHA) || + (mBlendDst == GGL_DST_ALPHA)) { + mBlendDst = GGL_ONE; + } + if ((mBlendDstA == GGL_ONE_MINUS_DST_ALPHA) || + (mBlendDstA == GGL_DST_ALPHA)) { + mBlendDstA = GGL_ONE; + } + } + + // if we need the framebuffer, read it now + const int blending = blending_codes(mBlendSrc, mBlendDst) | + blending_codes(mBlendSrcA, mBlendDstA); + + // XXX: handle special cases, destination not modified... + if ((mBlendSrc==GGL_ZERO) && (mBlendSrcA==GGL_ZERO) && + (mBlendDst==GGL_ONE) && (mBlendDstA==GGL_ONE)) { + // Destination unmodified (beware of logic ops) + } else if ((mBlendSrc==GGL_ZERO) && (mBlendSrcA==GGL_ZERO) && + (mBlendDst==GGL_ZERO) && (mBlendDstA==GGL_ZERO)) { + // Destination is zero (beware of logic ops) + } + + int fbComponents = 0; + const int masking = GGL_READ_NEEDS(MASK_ARGB, needs.n); + for (int i=0 ; i<4 ; i++) { + const int mask = 1<<i; + component_info_t& info = mInfo[i]; + int fs = i==GGLFormat::ALPHA ? mBlendSrcA : mBlendSrc; + int fd = i==GGLFormat::ALPHA ? mBlendDstA : mBlendDst; + if (fs==GGL_SRC_ALPHA_SATURATE && i==GGLFormat::ALPHA) + fs = GGL_ONE; + info.masked = !!(masking & mask); + info.inDest = !info.masked && mCbFormat.c[i].h && + ((mLogicOp & LOGIC_OP_SRC) || (!mLogicOp)); + if (mCbFormat.components >= GGL_LUMINANCE && + (i==GGLFormat::GREEN || i==GGLFormat::BLUE)) { + info.inDest = false; + } + info.needed = (i==GGLFormat::ALPHA) && + (isAlphaSourceNeeded() || mAlphaTest != GGL_ALWAYS); + info.replaced = !!(mTextureMachine.replaced & mask); + info.iterated = (!info.replaced && (info.inDest || info.needed)); + info.smooth = mSmooth && info.iterated; + info.fog = mFog && info.inDest && (i != GGLFormat::ALPHA); + info.blend = (fs != int(GGL_ONE)) || (fd > int(GGL_ZERO)); + + mBlending |= (info.blend ? mask : 0); + mMasking |= (mCbFormat.c[i].h && info.masked) ? mask : 0; + fbComponents |= mCbFormat.c[i].h ? mask : 0; + } + + mAllMasked = (mMasking == fbComponents); + if (mAllMasked) { + mDithering = 0; + } + + fragment_parts_t parts; + + // ------------------------------------------------------------------------ + prolog(); + // ------------------------------------------------------------------------ + + build_scanline_prolog(parts, needs); + + if (registerFile().status()) + return registerFile().status(); + + // ------------------------------------------------------------------------ + label("fragment_loop"); + // ------------------------------------------------------------------------ + { + Scratch regs(registerFile()); + + if (mDithering) { + // update the dither index. + MOV(AL, 0, parts.count.reg, + reg_imm(parts.count.reg, ROR, GGL_DITHER_ORDER_SHIFT)); + ADD(AL, 0, parts.count.reg, parts.count.reg, + imm( 1 << (32 - GGL_DITHER_ORDER_SHIFT))); + MOV(AL, 0, parts.count.reg, + reg_imm(parts.count.reg, ROR, 32 - GGL_DITHER_ORDER_SHIFT)); + } + + // XXX: could we do an early alpha-test here in some cases? + // It would probaly be used only with smooth-alpha and no texture + // (or no alpha component in the texture). + + // Early z-test + if (mAlphaTest==GGL_ALWAYS) { + build_depth_test(parts, Z_TEST|Z_WRITE); + } else { + // we cannot do the z-write here, because + // it might be killed by the alpha-test later + build_depth_test(parts, Z_TEST); + } + + { // texture coordinates + Scratch scratches(registerFile()); + + // texel generation + build_textures(parts, regs); + } + + if ((blending & (FACTOR_DST|BLEND_DST)) || + (mMasking && !mAllMasked) || + (mLogicOp & LOGIC_OP_DST)) + { + // blending / logic_op / masking need the framebuffer + mDstPixel.setTo(regs.obtain(), &mCbFormat); + + // load the framebuffer pixel + comment("fetch color-buffer"); + load(parts.cbPtr, mDstPixel); + } + + if (registerFile().status()) + return registerFile().status(); + + pixel_t pixel; + int directTex = mTextureMachine.directTexture; + if (directTex | parts.packed) { + // note: we can't have both here + // iterated color or direct texture + pixel = directTex ? parts.texel[directTex-1] : parts.iterated; + pixel.flags &= ~CORRUPTIBLE; + } else { + if (mDithering) { + const int ctxtReg = mBuilderContext.Rctx; + const int mask = GGL_DITHER_SIZE-1; + parts.dither = reg_t(regs.obtain()); + AND(AL, 0, parts.dither.reg, parts.count.reg, imm(mask)); + ADD(AL, 0, parts.dither.reg, parts.dither.reg, ctxtReg); + LDRB(AL, parts.dither.reg, parts.dither.reg, + immed12_pre(GGL_OFFSETOF(ditherMatrix))); + } + + // allocate a register for the resulting pixel + pixel.setTo(regs.obtain(), &mCbFormat, FIRST); + + build_component(pixel, parts, GGLFormat::ALPHA, regs); + + if (mAlphaTest!=GGL_ALWAYS) { + // only handle the z-write part here. We know z-test + // was successful, as well as alpha-test. + build_depth_test(parts, Z_WRITE); + } + + build_component(pixel, parts, GGLFormat::RED, regs); + build_component(pixel, parts, GGLFormat::GREEN, regs); + build_component(pixel, parts, GGLFormat::BLUE, regs); + + pixel.flags |= CORRUPTIBLE; + } + + if (registerFile().status()) + return registerFile().status(); + + if (pixel.reg == -1) { + // be defensive here. if we're here it's probably + // that this whole fragment is a no-op. + pixel = mDstPixel; + } + + if (!mAllMasked) { + // logic operation + build_logic_op(pixel, regs); + + // masking + build_masking(pixel, regs); + + comment("store"); + store(parts.cbPtr, pixel, WRITE_BACK); + } + } + + if (registerFile().status()) + return registerFile().status(); + + // update the iterated color... + if (parts.reload != 3) { + build_smooth_shade(parts); + } + + // update iterated z + build_iterate_z(parts); + + // update iterated fog + build_iterate_f(parts); + + SUB(AL, S, parts.count.reg, parts.count.reg, imm(1<<16)); + B(PL, "fragment_loop"); + label("epilog"); + epilog(registerFile().touched()); + + if ((mAlphaTest!=GGL_ALWAYS) || (mDepthTest!=GGL_ALWAYS)) { + if (mDepthTest!=GGL_ALWAYS) { + label("discard_before_textures"); + build_iterate_texture_coordinates(parts); + } + label("discard_after_textures"); + build_smooth_shade(parts); + build_iterate_z(parts); + build_iterate_f(parts); + if (!mAllMasked) { + ADD(AL, 0, parts.cbPtr.reg, parts.cbPtr.reg, imm(parts.cbPtr.size>>3)); + } + SUB(AL, S, parts.count.reg, parts.count.reg, imm(1<<16)); + B(PL, "fragment_loop"); + epilog(registerFile().touched()); + } + + return registerFile().status(); +} + +// --------------------------------------------------------------------------- + +void GGLAssembler::build_scanline_prolog( + fragment_parts_t& parts, const needs_t& needs) +{ + Scratch scratches(registerFile()); + int Rctx = mBuilderContext.Rctx; + + // compute count + comment("compute ct (# of pixels to process)"); + parts.count.setTo(obtainReg()); + int Rx = scratches.obtain(); + int Ry = scratches.obtain(); + CONTEXT_LOAD(Rx, iterators.xl); + CONTEXT_LOAD(parts.count.reg, iterators.xr); + CONTEXT_LOAD(Ry, iterators.y); + + // parts.count = iterators.xr - Rx + SUB(AL, 0, parts.count.reg, parts.count.reg, Rx); + SUB(AL, 0, parts.count.reg, parts.count.reg, imm(1)); + + if (mDithering) { + // parts.count.reg = 0xNNNNXXDD + // NNNN = count-1 + // DD = dither offset + // XX = 0xxxxxxx (x = garbage) + Scratch scratches(registerFile()); + int tx = scratches.obtain(); + int ty = scratches.obtain(); + AND(AL, 0, tx, Rx, imm(GGL_DITHER_MASK)); + AND(AL, 0, ty, Ry, imm(GGL_DITHER_MASK)); + ADD(AL, 0, tx, tx, reg_imm(ty, LSL, GGL_DITHER_ORDER_SHIFT)); + ORR(AL, 0, parts.count.reg, tx, reg_imm(parts.count.reg, LSL, 16)); + } else { + // parts.count.reg = 0xNNNN0000 + // NNNN = count-1 + MOV(AL, 0, parts.count.reg, reg_imm(parts.count.reg, LSL, 16)); + } + + if (!mAllMasked) { + // compute dst ptr + comment("compute color-buffer pointer"); + const int cb_bits = mCbFormat.size*8; + int Rs = scratches.obtain(); + parts.cbPtr.setTo(obtainReg(), cb_bits); + CONTEXT_LOAD(Rs, state.buffers.color.stride); + CONTEXT_LOAD(parts.cbPtr.reg, state.buffers.color.data); + SMLABB(AL, Rs, Ry, Rs, Rx); // Rs = Rx + Ry*Rs + base_offset(parts.cbPtr, parts.cbPtr, Rs); + scratches.recycle(Rs); + } + + // init fog + const int need_fog = GGL_READ_NEEDS(P_FOG, needs.p); + if (need_fog) { + comment("compute initial fog coordinate"); + Scratch scratches(registerFile()); + int dfdx = scratches.obtain(); + int ydfdy = scratches.obtain(); + int f = ydfdy; + CONTEXT_LOAD(dfdx, generated_vars.dfdx); + CONTEXT_LOAD(ydfdy, iterators.ydfdy); + MLA(AL, 0, f, Rx, dfdx, ydfdy); + CONTEXT_STORE(f, generated_vars.f); + } + + // init Z coordinate + if ((mDepthTest != GGL_ALWAYS) || GGL_READ_NEEDS(P_MASK_Z, needs.p)) { + parts.z = reg_t(obtainReg()); + comment("compute initial Z coordinate"); + Scratch scratches(registerFile()); + int dzdx = scratches.obtain(); + int ydzdy = parts.z.reg; + CONTEXT_LOAD(dzdx, generated_vars.dzdx); // 1.31 fixed-point + CONTEXT_LOAD(ydzdy, iterators.ydzdy); // 1.31 fixed-point + MLA(AL, 0, parts.z.reg, Rx, dzdx, ydzdy); + + // we're going to index zbase of parts.count + // zbase = base + (xl-count + stride*y)*2 + int Rs = dzdx; + int zbase = scratches.obtain(); + CONTEXT_LOAD(Rs, state.buffers.depth.stride); + CONTEXT_LOAD(zbase, state.buffers.depth.data); + SMLABB(AL, Rs, Ry, Rs, Rx); + ADD(AL, 0, Rs, Rs, reg_imm(parts.count.reg, LSR, 16)); + ADD(AL, 0, zbase, zbase, reg_imm(Rs, LSL, 1)); + CONTEXT_STORE(zbase, generated_vars.zbase); + } + + // init texture coordinates + init_textures(parts.coords, reg_t(Rx), reg_t(Ry)); + scratches.recycle(Ry); + + // iterated color + init_iterated_color(parts, reg_t(Rx)); + + // init coverage factor application (anti-aliasing) + if (mAA) { + parts.covPtr.setTo(obtainReg(), 16); + CONTEXT_LOAD(parts.covPtr.reg, state.buffers.coverage); + ADD(AL, 0, parts.covPtr.reg, parts.covPtr.reg, reg_imm(Rx, LSL, 1)); + } +} + +// --------------------------------------------------------------------------- + +void GGLAssembler::build_component( pixel_t& pixel, + const fragment_parts_t& parts, + int component, + Scratch& regs) +{ + static char const * comments[] = {"alpha", "red", "green", "blue"}; + comment(comments[component]); + + // local register file + Scratch scratches(registerFile()); + const int dst_component_size = pixel.component_size(component); + + component_t temp(-1); + build_incoming_component( temp, dst_component_size, + parts, component, scratches, regs); + + if (mInfo[component].inDest) { + + // blending... + build_blending( temp, mDstPixel, component, scratches ); + + // downshift component and rebuild pixel... + downshift(pixel, component, temp, parts.dither); + } +} + +void GGLAssembler::build_incoming_component( + component_t& temp, + int dst_size, + const fragment_parts_t& parts, + int component, + Scratch& scratches, + Scratch& global_regs) +{ + const uint32_t component_mask = 1<<component; + + // Figure out what we need for the blending stage... + int fs = component==GGLFormat::ALPHA ? mBlendSrcA : mBlendSrc; + int fd = component==GGLFormat::ALPHA ? mBlendDstA : mBlendDst; + if (fs==GGL_SRC_ALPHA_SATURATE && component==GGLFormat::ALPHA) { + fs = GGL_ONE; + } + + // Figure out what we need to extract and for what reason + const int blending = blending_codes(fs, fd); + + // Are we actually going to blend? + const int need_blending = (fs != int(GGL_ONE)) || (fd > int(GGL_ZERO)); + + // expand the source if the destination has more bits + int need_expander = false; + for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT-1 ; i++) { + texture_unit_t& tmu = mTextureMachine.tmu[i]; + if ((tmu.format_idx) && + (parts.texel[i].component_size(component) < dst_size)) { + need_expander = true; + } + } + + // do we need to extract this component? + const bool multiTexture = mTextureMachine.activeUnits > 1; + const int blend_needs_alpha_source = (component==GGLFormat::ALPHA) && + (isAlphaSourceNeeded()); + int need_extract = mInfo[component].needed; + if (mInfo[component].inDest) + { + need_extract |= ((need_blending ? + (blending & (BLEND_SRC|FACTOR_SRC)) : need_expander)); + need_extract |= (mTextureMachine.mask != mTextureMachine.replaced); + need_extract |= mInfo[component].smooth; + need_extract |= mInfo[component].fog; + need_extract |= mDithering; + need_extract |= multiTexture; + } + + if (need_extract) { + Scratch& regs = blend_needs_alpha_source ? global_regs : scratches; + component_t fragment; + + // iterated color + build_iterated_color(fragment, parts, component, regs); + + // texture environement (decal, modulate, replace) + build_texture_environment(fragment, parts, component, regs); + + // expand the source if the destination has more bits + if (need_expander && (fragment.size() < dst_size)) { + // we're here only if we fetched a texel + // (so we know for sure fragment is CORRUPTIBLE) + expand(fragment, fragment, dst_size); + } + + // We have a few specific things to do for the alpha-channel + if ((component==GGLFormat::ALPHA) && + (mInfo[component].needed || fragment.size()<dst_size)) + { + // convert to integer_t first and make sure + // we don't corrupt a needed register + if (fragment.l) { + component_t incoming(fragment); + modify(fragment, regs); + MOV(AL, 0, fragment.reg, reg_imm(incoming.reg, LSR, incoming.l)); + fragment.h -= fragment.l; + fragment.l = 0; + } + + // coverage factor application + build_coverage_application(fragment, parts, regs); + + // alpha-test + build_alpha_test(fragment, parts); + + if (blend_needs_alpha_source) { + // We keep only 8 bits for the blending stage + const int shift = fragment.h <= 8 ? 0 : fragment.h-8; + if (fragment.flags & CORRUPTIBLE) { + fragment.flags &= ~CORRUPTIBLE; + mAlphaSource.setTo(fragment.reg, + fragment.size(), fragment.flags); + if (shift) { + MOV(AL, 0, mAlphaSource.reg, + reg_imm(mAlphaSource.reg, LSR, shift)); + } + } else { + // XXX: it would better to do this in build_blend_factor() + // so we can avoid the extra MOV below. + mAlphaSource.setTo(regs.obtain(), + fragment.size(), CORRUPTIBLE); + if (shift) { + MOV(AL, 0, mAlphaSource.reg, + reg_imm(fragment.reg, LSR, shift)); + } else { + MOV(AL, 0, mAlphaSource.reg, fragment.reg); + } + } + mAlphaSource.s -= shift; + } + } + + // fog... + build_fog( fragment, component, regs ); + + temp = fragment; + } else { + if (mInfo[component].inDest) { + // extraction not needed and replace + // we just select the right component + if ((mTextureMachine.replaced & component_mask) == 0) { + // component wasn't replaced, so use it! + temp = component_t(parts.iterated, component); + } + for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; i++) { + const texture_unit_t& tmu = mTextureMachine.tmu[i]; + if ((tmu.mask & component_mask) && + ((tmu.replaced & component_mask) == 0)) { + temp = component_t(parts.texel[i], component); + } + } + } + } +} + +bool GGLAssembler::isAlphaSourceNeeded() const +{ + // XXX: also needed for alpha-test + const int bs = mBlendSrc; + const int bd = mBlendDst; + return bs==GGL_SRC_ALPHA_SATURATE || + bs==GGL_SRC_ALPHA || bs==GGL_ONE_MINUS_SRC_ALPHA || + bd==GGL_SRC_ALPHA || bd==GGL_ONE_MINUS_SRC_ALPHA ; +} + +// --------------------------------------------------------------------------- + +void GGLAssembler::build_smooth_shade(const fragment_parts_t& parts) +{ + if (mSmooth && !parts.iterated_packed) { + // update the iterated color in a pipelined way... + comment("update iterated color"); + Scratch scratches(registerFile()); + + const int reload = parts.reload; + for (int i=0 ; i<4 ; i++) { + if (!mInfo[i].iterated) + continue; + + int c = parts.argb[i].reg; + int dx = parts.argb_dx[i].reg; + + if (reload & 1) { + c = scratches.obtain(); + CONTEXT_LOAD(c, generated_vars.argb[i].c); + } + if (reload & 2) { + dx = scratches.obtain(); + CONTEXT_LOAD(dx, generated_vars.argb[i].dx); + } + + if (mSmooth) { + ADD(AL, 0, c, c, dx); + } + + if (reload & 1) { + CONTEXT_STORE(c, generated_vars.argb[i].c); + scratches.recycle(c); + } + if (reload & 2) { + scratches.recycle(dx); + } + } + } +} + +// --------------------------------------------------------------------------- + +void GGLAssembler::build_coverage_application(component_t& fragment, + const fragment_parts_t& parts, Scratch& regs) +{ + // here fragment.l is guarenteed to be 0 + if (mAA) { + // coverages are 1.15 fixed-point numbers + comment("coverage application"); + + component_t incoming(fragment); + modify(fragment, regs); + + Scratch scratches(registerFile()); + int cf = scratches.obtain(); + LDRH(AL, cf, parts.covPtr.reg, immed8_post(2)); + if (fragment.h > 31) { + fragment.h--; + SMULWB(AL, fragment.reg, incoming.reg, cf); + } else { + MOV(AL, 0, fragment.reg, reg_imm(incoming.reg, LSL, 1)); + SMULWB(AL, fragment.reg, fragment.reg, cf); + } + } +} + +// --------------------------------------------------------------------------- + +void GGLAssembler::build_alpha_test(component_t& fragment, + const fragment_parts_t& parts) +{ + if (mAlphaTest != GGL_ALWAYS) { + comment("Alpha Test"); + Scratch scratches(registerFile()); + int ref = scratches.obtain(); + const int shift = GGL_COLOR_BITS-fragment.size(); + CONTEXT_LOAD(ref, state.alpha_test.ref); + if (shift) CMP(AL, fragment.reg, reg_imm(ref, LSR, shift)); + else CMP(AL, fragment.reg, ref); + int cc = NV; + switch (mAlphaTest) { + case GGL_NEVER: cc = NV; break; + case GGL_LESS: cc = LT; break; + case GGL_EQUAL: cc = EQ; break; + case GGL_LEQUAL: cc = LS; break; + case GGL_GREATER: cc = HI; break; + case GGL_NOTEQUAL: cc = NE; break; + case GGL_GEQUAL: cc = HS; break; + } + B(cc^1, "discard_after_textures"); + } +} + +// --------------------------------------------------------------------------- + +void GGLAssembler::build_depth_test( + const fragment_parts_t& parts, uint32_t mask) +{ + mask &= Z_TEST|Z_WRITE; + const needs_t& needs = mBuilderContext.needs; + const int zmask = GGL_READ_NEEDS(P_MASK_Z, needs.p); + Scratch scratches(registerFile()); + + if (mDepthTest != GGL_ALWAYS || zmask) { + int cc=AL, ic=AL; + switch (mDepthTest) { + case GGL_LESS: ic = HI; break; + case GGL_EQUAL: ic = EQ; break; + case GGL_LEQUAL: ic = HS; break; + case GGL_GREATER: ic = LT; break; + case GGL_NOTEQUAL: ic = NE; break; + case GGL_GEQUAL: ic = LS; break; + case GGL_NEVER: + // this never happens, because it's taken care of when + // computing the needs. but we keep it for completness. + comment("Depth Test (NEVER)"); + B(AL, "discard_before_textures"); + return; + case GGL_ALWAYS: + // we're here because zmask is enabled + mask &= ~Z_TEST; // test always passes. + break; + } + + // inverse the condition + cc = ic^1; + + if ((mask & Z_WRITE) && !zmask) { + mask &= ~Z_WRITE; + } + + if (!mask) + return; + + comment("Depth Test"); + + int zbase = scratches.obtain(); + int depth = scratches.obtain(); + int z = parts.z.reg; + + CONTEXT_LOAD(zbase, generated_vars.zbase); // stall + SUB(AL, 0, zbase, zbase, reg_imm(parts.count.reg, LSR, 15)); + // above does zbase = zbase + ((count >> 16) << 1) + + if (mask & Z_TEST) { + LDRH(AL, depth, zbase); // stall + CMP(AL, depth, reg_imm(z, LSR, 16)); + B(cc, "discard_before_textures"); + } + if (mask & Z_WRITE) { + if (mask == Z_WRITE) { + // only z-write asked, cc is meaningless + ic = AL; + } + MOV(AL, 0, depth, reg_imm(z, LSR, 16)); + STRH(ic, depth, zbase); + } + } +} + +void GGLAssembler::build_iterate_z(const fragment_parts_t& parts) +{ + const needs_t& needs = mBuilderContext.needs; + if ((mDepthTest != GGL_ALWAYS) || GGL_READ_NEEDS(P_MASK_Z, needs.p)) { + Scratch scratches(registerFile()); + int dzdx = scratches.obtain(); + CONTEXT_LOAD(dzdx, generated_vars.dzdx); // stall + ADD(AL, 0, parts.z.reg, parts.z.reg, dzdx); + } +} + +void GGLAssembler::build_iterate_f(const fragment_parts_t& parts) +{ + const needs_t& needs = mBuilderContext.needs; + if (GGL_READ_NEEDS(P_FOG, needs.p)) { + Scratch scratches(registerFile()); + int dfdx = scratches.obtain(); + int f = scratches.obtain(); + CONTEXT_LOAD(f, generated_vars.f); + CONTEXT_LOAD(dfdx, generated_vars.dfdx); // stall + ADD(AL, 0, f, f, dfdx); + CONTEXT_STORE(f, generated_vars.f); + } +} + +// --------------------------------------------------------------------------- + +void GGLAssembler::build_logic_op(pixel_t& pixel, Scratch& regs) +{ + const needs_t& needs = mBuilderContext.needs; + const int opcode = GGL_READ_NEEDS(LOGIC_OP, needs.n) | GGL_CLEAR; + if (opcode == GGL_COPY) + return; + + comment("logic operation"); + + pixel_t s(pixel); + if (!(pixel.flags & CORRUPTIBLE)) { + pixel.reg = regs.obtain(); + pixel.flags |= CORRUPTIBLE; + } + + pixel_t d(mDstPixel); + switch(opcode) { + case GGL_CLEAR: MOV(AL, 0, pixel.reg, imm(0)); break; + case GGL_AND: AND(AL, 0, pixel.reg, s.reg, d.reg); break; + case GGL_AND_REVERSE: BIC(AL, 0, pixel.reg, s.reg, d.reg); break; + case GGL_COPY: break; + case GGL_AND_INVERTED: BIC(AL, 0, pixel.reg, d.reg, s.reg); break; + case GGL_NOOP: MOV(AL, 0, pixel.reg, d.reg); break; + case GGL_XOR: EOR(AL, 0, pixel.reg, s.reg, d.reg); break; + case GGL_OR: ORR(AL, 0, pixel.reg, s.reg, d.reg); break; + case GGL_NOR: ORR(AL, 0, pixel.reg, s.reg, d.reg); + MVN(AL, 0, pixel.reg, pixel.reg); break; + case GGL_EQUIV: EOR(AL, 0, pixel.reg, s.reg, d.reg); + MVN(AL, 0, pixel.reg, pixel.reg); break; + case GGL_INVERT: MVN(AL, 0, pixel.reg, d.reg); break; + case GGL_OR_REVERSE: // s | ~d == ~(~s & d) + BIC(AL, 0, pixel.reg, d.reg, s.reg); + MVN(AL, 0, pixel.reg, pixel.reg); break; + case GGL_COPY_INVERTED: MVN(AL, 0, pixel.reg, s.reg); break; + case GGL_OR_INVERTED: // ~s | d == ~(s & ~d) + BIC(AL, 0, pixel.reg, s.reg, d.reg); + MVN(AL, 0, pixel.reg, pixel.reg); break; + case GGL_NAND: AND(AL, 0, pixel.reg, s.reg, d.reg); + MVN(AL, 0, pixel.reg, pixel.reg); break; + case GGL_SET: MVN(AL, 0, pixel.reg, imm(0)); break; + }; +} + +// --------------------------------------------------------------------------- + +static uint32_t find_bottom(uint32_t val) +{ + uint32_t i = 0; + while (!(val & (3<<i))) + i+= 2; + return i; +} + +static void normalize(uint32_t& val, uint32_t& rot) +{ + rot = 0; + while (!(val&3) || (val & 0xFC000000)) { + uint32_t newval; + newval = val >> 2; + newval |= (val&3) << 30; + val = newval; + rot += 2; + if (rot == 32) { + rot = 0; + break; + } + } +} + +void GGLAssembler::build_and_immediate(int d, int s, uint32_t mask, int bits) +{ + uint32_t rot; + uint32_t size = ((bits>=32) ? 0 : (1LU << bits)) - 1; + mask &= size; + + if (mask == size) { + if (d != s) + MOV( AL, 0, d, s); + return; + } + + int negative_logic = !isValidImmediate(mask); + if (negative_logic) { + mask = ~mask & size; + } + normalize(mask, rot); + + if (mask) { + while (mask) { + uint32_t bitpos = find_bottom(mask); + int shift = rot + bitpos; + uint32_t m = mask & (0xff << bitpos); + mask &= ~m; + m >>= bitpos; + int32_t newMask = (m<<shift) | (m>>(32-shift)); + if (!negative_logic) { + AND( AL, 0, d, s, imm(newMask) ); + } else { + BIC( AL, 0, d, s, imm(newMask) ); + } + s = d; + } + } else { + MOV( AL, 0, d, imm(0)); + } +} + +void GGLAssembler::build_masking(pixel_t& pixel, Scratch& regs) +{ + if (!mMasking || mAllMasked) { + return; + } + + comment("color mask"); + + pixel_t fb(mDstPixel); + pixel_t s(pixel); + if (!(pixel.flags & CORRUPTIBLE)) { + pixel.reg = regs.obtain(); + pixel.flags |= CORRUPTIBLE; + } + + int mask = 0; + for (int i=0 ; i<4 ; i++) { + const int component_mask = 1<<i; + const int h = fb.format.c[i].h; + const int l = fb.format.c[i].l; + if (h && (!(mMasking & component_mask))) { + mask |= ((1<<(h-l))-1) << l; + } + } + + // There is no need to clear the masked components of the source + // (unless we applied a logic op), because they're already zeroed + // by construction (masked components are not computed) + + if (mLogicOp) { + const needs_t& needs = mBuilderContext.needs; + const int opcode = GGL_READ_NEEDS(LOGIC_OP, needs.n) | GGL_CLEAR; + if (opcode != GGL_CLEAR) { + // clear masked component of source + build_and_immediate(pixel.reg, s.reg, mask, fb.size()); + s = pixel; + } + } + + // clear non masked components of destination + build_and_immediate(fb.reg, fb.reg, ~mask, fb.size()); + + // or back the channels that were masked + if (s.reg == fb.reg) { + // this is in fact a MOV + if (s.reg == pixel.reg) { + // ugh. this in in fact a nop + } else { + MOV(AL, 0, pixel.reg, fb.reg); + } + } else { + ORR(AL, 0, pixel.reg, s.reg, fb.reg); + } +} + +// --------------------------------------------------------------------------- + +void GGLAssembler::base_offset( + const pointer_t& d, const pointer_t& b, const reg_t& o) +{ + switch (b.size) { + case 32: + ADD(AL, 0, d.reg, b.reg, reg_imm(o.reg, LSL, 2)); + break; + case 24: + if (d.reg == b.reg) { + ADD(AL, 0, d.reg, b.reg, reg_imm(o.reg, LSL, 1)); + ADD(AL, 0, d.reg, d.reg, o.reg); + } else { + ADD(AL, 0, d.reg, o.reg, reg_imm(o.reg, LSL, 1)); + ADD(AL, 0, d.reg, d.reg, b.reg); + } + break; + case 16: + ADD(AL, 0, d.reg, b.reg, reg_imm(o.reg, LSL, 1)); + break; + case 8: + ADD(AL, 0, d.reg, b.reg, o.reg); + break; + } +} + +// ---------------------------------------------------------------------------- +// cheezy register allocator... +// ---------------------------------------------------------------------------- + +void RegisterAllocator::reset() +{ + mRegs.reset(); +} + +int RegisterAllocator::reserveReg(int reg) +{ + return mRegs.reserve(reg); +} + +int RegisterAllocator::obtainReg() +{ + return mRegs.obtain(); +} + +void RegisterAllocator::recycleReg(int reg) +{ + mRegs.recycle(reg); +} + +RegisterAllocator::RegisterFile& RegisterAllocator::registerFile() +{ + return mRegs; +} + +// ---------------------------------------------------------------------------- + +RegisterAllocator::RegisterFile::RegisterFile() + : mRegs(0), mTouched(0), mStatus(0) +{ + reserve(ARMAssemblerInterface::SP); + reserve(ARMAssemblerInterface::PC); +} + +RegisterAllocator::RegisterFile::RegisterFile(const RegisterFile& rhs) + : mRegs(rhs.mRegs), mTouched(rhs.mTouched) +{ +} + +RegisterAllocator::RegisterFile::~RegisterFile() +{ +} + +bool RegisterAllocator::RegisterFile::operator == (const RegisterFile& rhs) const +{ + return (mRegs == rhs.mRegs); +} + +void RegisterAllocator::RegisterFile::reset() +{ + mRegs = mTouched = mStatus = 0; + reserve(ARMAssemblerInterface::SP); + reserve(ARMAssemblerInterface::PC); +} + +int RegisterAllocator::RegisterFile::reserve(int reg) +{ + LOG_ALWAYS_FATAL_IF(isUsed(reg), + "reserving register %d, but already in use", + reg); + mRegs |= (1<<reg); + mTouched |= mRegs; + return reg; +} + +void RegisterAllocator::RegisterFile::reserveSeveral(uint32_t regMask) +{ + mRegs |= regMask; + mTouched |= regMask; +} + +int RegisterAllocator::RegisterFile::isUsed(int reg) const +{ + LOG_ALWAYS_FATAL_IF(reg>=16, "invalid register %d", reg); + return mRegs & (1<<reg); +} + +int RegisterAllocator::RegisterFile::obtain() +{ + const char priorityList[14] = { 0, 1, 2, 3, + 12, 14, 4, 5, + 6, 7, 8, 9, + 10, 11 }; + const int nbreg = sizeof(priorityList); + int i, r; + for (i=0 ; i<nbreg ; i++) { + r = priorityList[i]; + if (!isUsed(r)) { + break; + } + } + // this is not an error anymore because, we'll try again with + // a lower optimization level. + //LOGE_IF(i >= nbreg, "pixelflinger ran out of registers\n"); + if (i >= nbreg) { + mStatus |= OUT_OF_REGISTERS; + // we return SP so we can more easily debug things + // the code will never be run anyway. + return ARMAssemblerInterface::SP; + } + reserve(r); + return r; +} + +bool RegisterAllocator::RegisterFile::hasFreeRegs() const +{ + return ((mRegs & 0xFFFF) == 0xFFFF) ? false : true; +} + +int RegisterAllocator::RegisterFile::countFreeRegs() const +{ + int f = ~mRegs & 0xFFFF; + // now count number of 1 + f = (f & 0x5555) + ((f>>1) & 0x5555); + f = (f & 0x3333) + ((f>>2) & 0x3333); + f = (f & 0x0F0F) + ((f>>4) & 0x0F0F); + f = (f & 0x00FF) + ((f>>8) & 0x00FF); + return f; +} + +void RegisterAllocator::RegisterFile::recycle(int reg) +{ + LOG_FATAL_IF(!isUsed(reg), + "recycling unallocated register %d", + reg); + mRegs &= ~(1<<reg); +} + +void RegisterAllocator::RegisterFile::recycleSeveral(uint32_t regMask) +{ + LOG_FATAL_IF((mRegs & regMask)!=regMask, + "recycling unallocated registers " + "(recycle=%08x, allocated=%08x, unallocated=%08x)", + regMask, mRegs, mRegs®Mask); + mRegs &= ~regMask; +} + +uint32_t RegisterAllocator::RegisterFile::touched() const +{ + return mTouched; +} + +// ---------------------------------------------------------------------------- + +}; // namespace android + |