/************************************************************************** * * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. * * 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, sub license, 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 NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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. * **************************************************************************/ #include "i915_reg.h" #include "i915_context.h" #include "i915_fpc.h" #include "util/u_math.h" #define A0_DEST( reg ) (((reg)&UREG_TYPE_NR_MASK)>>UREG_A0_DEST_SHIFT_LEFT) #define D0_DEST( reg ) (((reg)&UREG_TYPE_NR_MASK)>>UREG_A0_DEST_SHIFT_LEFT) #define T0_DEST( reg ) (((reg)&UREG_TYPE_NR_MASK)>>UREG_A0_DEST_SHIFT_LEFT) #define A0_SRC0( reg ) (((reg)&UREG_MASK)>>UREG_A0_SRC0_SHIFT_LEFT) #define A1_SRC0( reg ) (((reg)&UREG_MASK)<<UREG_A1_SRC0_SHIFT_RIGHT) #define A1_SRC1( reg ) (((reg)&UREG_MASK)>>UREG_A1_SRC1_SHIFT_LEFT) #define A2_SRC1( reg ) (((reg)&UREG_MASK)<<UREG_A2_SRC1_SHIFT_RIGHT) #define A2_SRC2( reg ) (((reg)&UREG_MASK)>>UREG_A2_SRC2_SHIFT_LEFT) /* These are special, and don't have swizzle/negate bits. */ #define T0_SAMPLER( reg ) (GET_UREG_NR(reg)<<T0_SAMPLER_NR_SHIFT) #define T1_ADDRESS_REG( reg ) ((GET_UREG_NR(reg)<<T1_ADDRESS_REG_NR_SHIFT) | \ (GET_UREG_TYPE(reg)<<T1_ADDRESS_REG_TYPE_SHIFT)) /* Macros for translating UREG's into the various register fields used * by the I915 programmable unit. */ #define UREG_A0_DEST_SHIFT_LEFT (UREG_TYPE_SHIFT - A0_DEST_TYPE_SHIFT) #define UREG_A0_SRC0_SHIFT_LEFT (UREG_TYPE_SHIFT - A0_SRC0_TYPE_SHIFT) #define UREG_A1_SRC0_SHIFT_RIGHT (A1_SRC0_CHANNEL_W_SHIFT - UREG_CHANNEL_W_SHIFT) #define UREG_A1_SRC1_SHIFT_LEFT (UREG_TYPE_SHIFT - A1_SRC1_TYPE_SHIFT) #define UREG_A2_SRC1_SHIFT_RIGHT (A2_SRC1_CHANNEL_W_SHIFT - UREG_CHANNEL_W_SHIFT) #define UREG_A2_SRC2_SHIFT_LEFT (UREG_TYPE_SHIFT - A2_SRC2_TYPE_SHIFT) #define UREG_MASK 0xffffff00 #define UREG_TYPE_NR_MASK ((REG_TYPE_MASK << UREG_TYPE_SHIFT) | \ (REG_NR_MASK << UREG_NR_SHIFT)) uint i915_get_temp(struct i915_fp_compile *p) { int bit = ffs(~p->temp_flag); if (!bit) { i915_program_error(p, "i915_get_temp: out of temporaries\n"); return 0; } p->temp_flag |= 1 << (bit - 1); return bit - 1; } static void i915_release_temp(struct i915_fp_compile *p, int reg) { p->temp_flag &= ~(1 << reg); } /** * Get unpreserved temporary, a temp whose value is not preserved between * PS program phases. */ uint i915_get_utemp(struct i915_fp_compile * p) { int bit = ffs(~p->utemp_flag); if (!bit) { i915_program_error(p, "i915_get_utemp: out of temporaries\n"); return 0; } p->utemp_flag |= 1 << (bit - 1); return UREG(REG_TYPE_U, (bit - 1)); } void i915_release_utemps(struct i915_fp_compile *p) { p->utemp_flag = ~0x7; } uint i915_emit_decl(struct i915_fp_compile *p, uint type, uint nr, uint d0_flags) { uint reg = UREG(type, nr); if (type == REG_TYPE_T) { if (p->decl_t & (1 << nr)) return reg; p->decl_t |= (1 << nr); } else if (type == REG_TYPE_S) { if (p->decl_s & (1 << nr)) return reg; p->decl_s |= (1 << nr); } else return reg; *(p->decl++) = (D0_DCL | D0_DEST(reg) | d0_flags); *(p->decl++) = D1_MBZ; *(p->decl++) = D2_MBZ; p->nr_decl_insn++; return reg; } uint i915_emit_arith(struct i915_fp_compile * p, uint op, uint dest, uint mask, uint saturate, uint src0, uint src1, uint src2) { uint c[3]; uint nr_const = 0; assert(GET_UREG_TYPE(dest) != REG_TYPE_CONST); dest = UREG(GET_UREG_TYPE(dest), GET_UREG_NR(dest)); assert(dest); if (GET_UREG_TYPE(src0) == REG_TYPE_CONST) c[nr_const++] = 0; if (GET_UREG_TYPE(src1) == REG_TYPE_CONST) c[nr_const++] = 1; if (GET_UREG_TYPE(src2) == REG_TYPE_CONST) c[nr_const++] = 2; /* Recursively call this function to MOV additional const values * into temporary registers. Use utemp registers for this - * currently shouldn't be possible to run out, but keep an eye on * this. */ if (nr_const > 1) { uint s[3], first, i, old_utemp_flag; s[0] = src0; s[1] = src1; s[2] = src2; old_utemp_flag = p->utemp_flag; first = GET_UREG_NR(s[c[0]]); for (i = 1; i < nr_const; i++) { if (GET_UREG_NR(s[c[i]]) != first) { uint tmp = i915_get_utemp(p); i915_emit_arith(p, A0_MOV, tmp, A0_DEST_CHANNEL_ALL, 0, s[c[i]], 0, 0); s[c[i]] = tmp; } } src0 = s[0]; src1 = s[1]; src2 = s[2]; p->utemp_flag = old_utemp_flag; /* restore */ } *(p->csr++) = (op | A0_DEST(dest) | mask | saturate | A0_SRC0(src0)); *(p->csr++) = (A1_SRC0(src0) | A1_SRC1(src1)); *(p->csr++) = (A2_SRC1(src1) | A2_SRC2(src2)); p->nr_alu_insn++; return dest; } /** * Emit a texture load or texkill instruction. * \param dest the dest i915 register * \param destmask the dest register writemask * \param sampler the i915 sampler register * \param coord the i915 source texcoord operand * \param opcode the instruction opcode */ uint i915_emit_texld( struct i915_fp_compile *p, uint dest, uint destmask, uint sampler, uint coord, uint opcode ) { const uint k = UREG(GET_UREG_TYPE(coord), GET_UREG_NR(coord)); int temp = -1; if (coord != k) { /* texcoord is swizzled or negated. Need to allocate a new temporary * register (a utemp / unpreserved temp) won't do. */ uint tempReg; temp = i915_get_temp(p); /* get temp reg index */ tempReg = UREG(REG_TYPE_R, temp); /* make i915 register */ i915_emit_arith( p, A0_MOV, tempReg, A0_DEST_CHANNEL_ALL, /* dest reg, writemask */ 0, /* saturate */ coord, 0, 0 ); /* src0, src1, src2 */ /* new src texcoord is tempReg */ coord = tempReg; } /* Don't worry about saturate as we only support */ if (destmask != A0_DEST_CHANNEL_ALL) { /* if not writing to XYZW... */ uint tmp = i915_get_utemp(p); i915_emit_texld( p, tmp, A0_DEST_CHANNEL_ALL, sampler, coord, opcode ); i915_emit_arith( p, A0_MOV, dest, destmask, 0, tmp, 0, 0 ); /* XXX release utemp here? */ } else { assert(GET_UREG_TYPE(dest) != REG_TYPE_CONST); assert(dest = UREG(GET_UREG_TYPE(dest), GET_UREG_NR(dest))); /* is the sampler coord a texcoord input reg? */ if (GET_UREG_TYPE(coord) != REG_TYPE_T) { p->nr_tex_indirect++; } *(p->csr++) = (opcode | T0_DEST( dest ) | T0_SAMPLER( sampler )); *(p->csr++) = T1_ADDRESS_REG( coord ); *(p->csr++) = T2_MBZ; p->nr_tex_insn++; } if (temp >= 0) i915_release_temp(p, temp); return dest; } uint i915_emit_const1f(struct i915_fp_compile * p, float c0) { struct i915_fragment_shader *ifs = p->shader; unsigned reg, idx; if (c0 == 0.0) return swizzle(UREG(REG_TYPE_R, 0), ZERO, ZERO, ZERO, ZERO); if (c0 == 1.0) return swizzle(UREG(REG_TYPE_R, 0), ONE, ONE, ONE, ONE); for (reg = 0; reg < I915_MAX_CONSTANT; reg++) { if (ifs->constant_flags[reg] == I915_CONSTFLAG_USER) continue; for (idx = 0; idx < 4; idx++) { if (!(ifs->constant_flags[reg] & (1 << idx)) || ifs->constants[reg][idx] == c0) { ifs->constants[reg][idx] = c0; ifs->constant_flags[reg] |= 1 << idx; if (reg + 1 > ifs->num_constants) ifs->num_constants = reg + 1; return swizzle(UREG(REG_TYPE_CONST, reg), idx, ZERO, ZERO, ONE); } } } i915_program_error(p, "i915_emit_const1f: out of constants\n"); return 0; } uint i915_emit_const2f(struct i915_fp_compile * p, float c0, float c1) { struct i915_fragment_shader *ifs = p->shader; unsigned reg, idx; if (c0 == 0.0) return swizzle(i915_emit_const1f(p, c1), ZERO, X, Z, W); if (c0 == 1.0) return swizzle(i915_emit_const1f(p, c1), ONE, X, Z, W); if (c1 == 0.0) return swizzle(i915_emit_const1f(p, c0), X, ZERO, Z, W); if (c1 == 1.0) return swizzle(i915_emit_const1f(p, c0), X, ONE, Z, W); for (reg = 0; reg < I915_MAX_CONSTANT; reg++) { if (ifs->constant_flags[reg] == 0xf || ifs->constant_flags[reg] == I915_CONSTFLAG_USER) continue; for (idx = 0; idx < 3; idx++) { if (!(ifs->constant_flags[reg] & (3 << idx))) { ifs->constants[reg][idx + 0] = c0; ifs->constants[reg][idx + 1] = c1; ifs->constant_flags[reg] |= 3 << idx; if (reg + 1 > ifs->num_constants) ifs->num_constants = reg + 1; return swizzle(UREG(REG_TYPE_CONST, reg), idx, idx + 1, ZERO, ONE); } } } i915_program_error(p, "i915_emit_const2f: out of constants\n"); return 0; } uint i915_emit_const4f(struct i915_fp_compile * p, float c0, float c1, float c2, float c3) { struct i915_fragment_shader *ifs = p->shader; unsigned reg; for (reg = 0; reg < I915_MAX_CONSTANT; reg++) { if (ifs->constant_flags[reg] == 0xf && ifs->constants[reg][0] == c0 && ifs->constants[reg][1] == c1 && ifs->constants[reg][2] == c2 && ifs->constants[reg][3] == c3) { return UREG(REG_TYPE_CONST, reg); } else if (ifs->constant_flags[reg] == 0) { ifs->constants[reg][0] = c0; ifs->constants[reg][1] = c1; ifs->constants[reg][2] = c2; ifs->constants[reg][3] = c3; ifs->constant_flags[reg] = 0xf; if (reg + 1 > ifs->num_constants) ifs->num_constants = reg + 1; return UREG(REG_TYPE_CONST, reg); } } i915_program_error(p, "i915_emit_const4f: out of constants\n"); return 0; } uint i915_emit_const4fv(struct i915_fp_compile * p, const float * c) { return i915_emit_const4f(p, c[0], c[1], c[2], c[3]); }