mirror of https://gitlab.freedesktop.org/mesa/mesa
367 lines
11 KiB
C
367 lines
11 KiB
C
/**************************************************************************
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*
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* Copyright 2003 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "util/u_math.h"
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#include "i915_context.h"
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#include "i915_fpc.h"
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#include "i915_reg.h"
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uint
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i915_get_temp(struct i915_fp_compile *p)
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{
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int bit = ffs(~p->temp_flag);
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if (!bit) {
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i915_program_error(p, "i915_get_temp: out of temporaries");
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return 0;
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}
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p->temp_flag |= 1 << (bit - 1);
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return bit - 1;
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}
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static void
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i915_release_temp(struct i915_fp_compile *p, int reg)
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{
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p->temp_flag &= ~(1 << reg);
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}
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/**
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* Get unpreserved temporary, a temp whose value is not preserved between
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* PS program phases.
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*/
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uint
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i915_get_utemp(struct i915_fp_compile *p)
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{
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int bit = ffs(~p->utemp_flag);
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if (!bit) {
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i915_program_error(p, "i915_get_utemp: out of temporaries");
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return 0;
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}
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p->utemp_flag |= 1 << (bit - 1);
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return UREG(REG_TYPE_U, (bit - 1));
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}
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void
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i915_release_utemps(struct i915_fp_compile *p)
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{
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p->utemp_flag = ~0x7;
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}
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uint
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i915_emit_decl(struct i915_fp_compile *p, uint type, uint nr, uint d0_flags)
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{
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uint reg = UREG(type, nr);
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if (type == REG_TYPE_T) {
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if (p->decl_t & (1 << nr))
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return reg;
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p->decl_t |= (1 << nr);
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} else if (type == REG_TYPE_S) {
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if (p->decl_s & (1 << nr))
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return reg;
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p->decl_s |= (1 << nr);
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} else
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return reg;
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if (p->decl < p->declarations + I915_PROGRAM_SIZE) {
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*(p->decl++) = (D0_DCL | D0_DEST(reg) | d0_flags);
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*(p->decl++) = D1_MBZ;
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*(p->decl++) = D2_MBZ;
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} else
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i915_program_error(p, "Out of declarations");
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p->nr_decl_insn++;
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return reg;
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}
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uint
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i915_emit_arith(struct i915_fp_compile *p, uint op, uint dest, uint mask,
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uint saturate, uint src0, uint src1, uint src2)
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{
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uint c[3];
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uint nr_const = 0;
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assert(GET_UREG_TYPE(dest) != REG_TYPE_CONST);
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dest = UREG(GET_UREG_TYPE(dest), GET_UREG_NR(dest));
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assert(dest);
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if (GET_UREG_TYPE(src0) == REG_TYPE_CONST)
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c[nr_const++] = 0;
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if (GET_UREG_TYPE(src1) == REG_TYPE_CONST)
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c[nr_const++] = 1;
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if (GET_UREG_TYPE(src2) == REG_TYPE_CONST)
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c[nr_const++] = 2;
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/* Recursively call this function to MOV additional const values
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* into temporary registers. Use utemp registers for this -
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* currently shouldn't be possible to run out, but keep an eye on
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* this.
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*/
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if (nr_const > 1) {
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uint s[3], first, i, old_utemp_flag;
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s[0] = src0;
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s[1] = src1;
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s[2] = src2;
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old_utemp_flag = p->utemp_flag;
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first = GET_UREG_NR(s[c[0]]);
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for (i = 1; i < nr_const; i++) {
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if (GET_UREG_NR(s[c[i]]) != first) {
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uint tmp = i915_get_utemp(p);
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i915_emit_arith(p, A0_MOV, tmp, A0_DEST_CHANNEL_ALL, 0, s[c[i]], 0,
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0);
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s[c[i]] = tmp;
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}
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}
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src0 = s[0];
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src1 = s[1];
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src2 = s[2];
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p->utemp_flag = old_utemp_flag; /* restore */
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}
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if (p->csr < p->program + I915_PROGRAM_SIZE) {
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*(p->csr++) = (op | A0_DEST(dest) | mask | saturate | A0_SRC0(src0));
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*(p->csr++) = (A1_SRC0(src0) | A1_SRC1(src1));
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*(p->csr++) = (A2_SRC1(src1) | A2_SRC2(src2));
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} else
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i915_program_error(p, "Out of instructions");
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if (GET_UREG_TYPE(dest) == REG_TYPE_R)
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p->register_phases[GET_UREG_NR(dest)] = p->nr_tex_indirect;
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p->nr_alu_insn++;
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return dest;
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}
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/**
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* Emit a texture load or texkill instruction.
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* \param dest the dest i915 register
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* \param destmask the dest register writemask
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* \param sampler the i915 sampler register
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* \param coord the i915 source texcoord operand
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* \param opcode the instruction opcode
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*/
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uint
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i915_emit_texld(struct i915_fp_compile *p, uint dest, uint destmask,
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uint sampler, uint coord, uint opcode, uint num_coord)
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{
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const uint k = UREG(GET_UREG_TYPE(coord), GET_UREG_NR(coord));
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int temp = -1;
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uint ignore = 0;
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/* Eliminate the useless texture coordinates. Otherwise we end up generating
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* a swizzle for no reason below. */
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switch (num_coord) {
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case 0:
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ignore |= (0xf << UREG_CHANNEL_X_SHIFT);
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FALLTHROUGH;
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case 1:
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ignore |= (0xf << UREG_CHANNEL_Y_SHIFT);
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FALLTHROUGH;
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case 2:
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ignore |= (0xf << UREG_CHANNEL_Z_SHIFT);
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FALLTHROUGH;
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case 3:
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ignore |= (0xf << UREG_CHANNEL_W_SHIFT);
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}
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if ((coord & ~ignore) != (k & ~ignore) ||
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GET_UREG_TYPE(coord) == REG_TYPE_CONST) {
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/* texcoord is swizzled or negated. Need to allocate a new temporary
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* register (a utemp / unpreserved temp) won't do.
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*/
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uint tempReg;
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temp = i915_get_temp(p); /* get temp reg index */
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tempReg = UREG(REG_TYPE_R, temp); /* make i915 register */
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i915_emit_arith(p, A0_MOV, tempReg,
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A0_DEST_CHANNEL_ALL, /* dest reg, writemask */
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0, /* saturate */
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coord, 0, 0); /* src0, src1, src2 */
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/* new src texcoord is tempReg */
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coord = tempReg;
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}
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/* Don't worry about saturate as we only support
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*/
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if (destmask != A0_DEST_CHANNEL_ALL) {
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/* if not writing to XYZW... */
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uint tmp = i915_get_utemp(p);
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i915_emit_texld(p, tmp, A0_DEST_CHANNEL_ALL, sampler, coord, opcode,
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num_coord);
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i915_emit_arith(p, A0_MOV, dest, destmask, 0, tmp, 0, 0);
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/* XXX release utemp here? */
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} else {
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assert(GET_UREG_TYPE(dest) != REG_TYPE_CONST);
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assert(dest == UREG(GET_UREG_TYPE(dest), GET_UREG_NR(dest)));
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/* Output register being oC or oD defines a phase boundary */
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if (GET_UREG_TYPE(dest) == REG_TYPE_OC ||
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GET_UREG_TYPE(dest) == REG_TYPE_OD)
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p->nr_tex_indirect++;
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/* Reading from an r# register whose contents depend on output of the
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* current phase defines a phase boundary.
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*/
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if (GET_UREG_TYPE(coord) == REG_TYPE_R &&
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p->register_phases[GET_UREG_NR(coord)] == p->nr_tex_indirect)
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p->nr_tex_indirect++;
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if (p->csr < p->program + I915_PROGRAM_SIZE) {
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*(p->csr++) = (opcode | T0_DEST(dest) | T0_SAMPLER(sampler));
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*(p->csr++) = T1_ADDRESS_REG(coord);
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*(p->csr++) = T2_MBZ;
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} else
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i915_program_error(p, "Out of instructions");
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if (GET_UREG_TYPE(dest) == REG_TYPE_R)
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p->register_phases[GET_UREG_NR(dest)] = p->nr_tex_indirect;
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p->nr_tex_insn++;
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}
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if (temp >= 0)
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i915_release_temp(p, temp);
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return dest;
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}
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uint
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i915_emit_const1f(struct i915_fp_compile *p, float c0)
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{
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struct i915_fragment_shader *ifs = p->shader;
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unsigned reg, idx;
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if (c0 == 0.0)
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return swizzle(UREG(REG_TYPE_R, 0), ZERO, ZERO, ZERO, ZERO);
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if (c0 == 1.0)
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return swizzle(UREG(REG_TYPE_R, 0), ONE, ONE, ONE, ONE);
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for (reg = 0; reg < I915_MAX_CONSTANT; reg++) {
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if (ifs->constant_flags[reg] == I915_CONSTFLAG_USER)
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continue;
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for (idx = 0; idx < 4; idx++) {
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if (!(ifs->constant_flags[reg] & (1 << idx)) ||
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ifs->constants[reg][idx] == c0) {
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ifs->constants[reg][idx] = c0;
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ifs->constant_flags[reg] |= 1 << idx;
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if (reg + 1 > ifs->num_constants)
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ifs->num_constants = reg + 1;
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return swizzle(UREG(REG_TYPE_CONST, reg), idx, ZERO, ZERO, ONE);
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}
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}
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}
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i915_program_error(p, "i915_emit_const1f: out of constants");
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return 0;
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}
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uint
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i915_emit_const2f(struct i915_fp_compile *p, float c0, float c1)
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{
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struct i915_fragment_shader *ifs = p->shader;
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unsigned reg, idx;
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if (c0 == 0.0)
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return swizzle(i915_emit_const1f(p, c1), ZERO, X, Z, W);
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if (c0 == 1.0)
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return swizzle(i915_emit_const1f(p, c1), ONE, X, Z, W);
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if (c1 == 0.0)
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return swizzle(i915_emit_const1f(p, c0), X, ZERO, Z, W);
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if (c1 == 1.0)
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return swizzle(i915_emit_const1f(p, c0), X, ONE, Z, W);
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// XXX emit swizzle here for 0, 1, -1 and any combination thereof
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// we can use swizzle + neg for that
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for (reg = 0; reg < I915_MAX_CONSTANT; reg++) {
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if (ifs->constant_flags[reg] == 0xf ||
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ifs->constant_flags[reg] == I915_CONSTFLAG_USER)
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continue;
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for (idx = 0; idx < 3; idx++) {
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if (!(ifs->constant_flags[reg] & (3 << idx))) {
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ifs->constants[reg][idx + 0] = c0;
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ifs->constants[reg][idx + 1] = c1;
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ifs->constant_flags[reg] |= 3 << idx;
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if (reg + 1 > ifs->num_constants)
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ifs->num_constants = reg + 1;
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return swizzle(UREG(REG_TYPE_CONST, reg), idx, idx + 1, ZERO, ONE);
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}
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}
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}
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i915_program_error(p, "i915_emit_const2f: out of constants");
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return 0;
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}
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uint
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i915_emit_const4f(struct i915_fp_compile *p, float c0, float c1, float c2,
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float c3)
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{
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struct i915_fragment_shader *ifs = p->shader;
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unsigned reg;
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// XXX emit swizzle here for 0, 1, -1 and any combination thereof
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// we can use swizzle + neg for that
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for (reg = 0; reg < I915_MAX_CONSTANT; reg++) {
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if (ifs->constant_flags[reg] == 0xf && ifs->constants[reg][0] == c0 &&
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ifs->constants[reg][1] == c1 && ifs->constants[reg][2] == c2 &&
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ifs->constants[reg][3] == c3) {
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return UREG(REG_TYPE_CONST, reg);
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} else if (ifs->constant_flags[reg] == 0) {
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ifs->constants[reg][0] = c0;
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ifs->constants[reg][1] = c1;
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ifs->constants[reg][2] = c2;
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ifs->constants[reg][3] = c3;
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ifs->constant_flags[reg] = 0xf;
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if (reg + 1 > ifs->num_constants)
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ifs->num_constants = reg + 1;
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return UREG(REG_TYPE_CONST, reg);
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}
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}
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i915_program_error(p, "i915_emit_const4f: out of constants");
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return 0;
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}
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uint
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i915_emit_const4fv(struct i915_fp_compile *p, const float *c)
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{
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return i915_emit_const4f(p, c[0], c[1], c[2], c[3]);
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}
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