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gallium: use temp reg for storing color to avoid reading 'result.color'

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This commit is contained in:
Brian 2008-01-22 20:52:48 -07:00
parent 59e8f3e5e9
commit 286380020b
1 changed files with 37 additions and 28 deletions
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65
src/mesa/state_tracker/st_atom_pixeltransfer.c
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@ -109,6 +109,7 @@ get_pixel_transfer_program(GLcontext *ctx, const struct state_key *key)
struct gl_program_parameter_list *params;
struct gl_fragment_program *fp;
GLuint ic = 0;
const GLuint colorTemp = 0;
fp = (struct gl_fragment_program *)
ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
@ -117,11 +118,11 @@ get_pixel_transfer_program(GLcontext *ctx, const struct state_key *key)
params = _mesa_new_parameter_list();
/* TEX result.color, fragment.texcoord[0], texture[0], 2D; */
/* TEX colorTemp, fragment.texcoord[0], texture[0], 2D; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_TEX;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].DstReg.File = PROGRAM_TEMPORARY;
inst[ic].DstReg.Index = colorTemp;
inst[ic].SrcReg[0].File = PROGRAM_INPUT;
inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
inst[ic].TexSrcUnit = 0;
@ -130,7 +131,7 @@ get_pixel_transfer_program(GLcontext *ctx, const struct state_key *key)
fp->Base.InputsRead = (1 << FRAG_ATTRIB_TEX0);
fp->Base.OutputsWritten = (1 << FRAG_RESULT_COLR);
/* MAD result.color, result.color, scale, bias; */
/* MAD colorTemp, colorTemp, scale, bias; */
if (key->scaleAndBias) {
static const gl_state_index scale_state[STATE_LENGTH] =
{ STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
@ -153,10 +154,10 @@ get_pixel_transfer_program(GLcontext *ctx, const struct state_key *key)
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_MAD;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].SrcReg[0].File = PROGRAM_OUTPUT;
inst[ic].SrcReg[0].Index = FRAG_RESULT_COLR;
inst[ic].DstReg.File = PROGRAM_TEMPORARY;
inst[ic].DstReg.Index = colorTemp;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = colorTemp;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = scale_p;
inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
@ -178,67 +179,75 @@ get_pixel_transfer_program(GLcontext *ctx, const struct state_key *key)
GLint row1_p = _mesa_add_state_reference(params, row1_state);
GLint row2_p = _mesa_add_state_reference(params, row2_state);
GLint row3_p = _mesa_add_state_reference(params, row3_state);
const GLuint temp = 1;
/* MOV temp0, result.color; */
/* MOV temp, colorTemp; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_MOV;
inst[ic].DstReg.File = PROGRAM_TEMPORARY;
inst[ic].DstReg.Index = 0;
inst[ic].SrcReg[0].File = PROGRAM_OUTPUT;
inst[ic].SrcReg[0].Index = FRAG_RESULT_COLR;
inst[ic].DstReg.Index = temp;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = colorTemp;
ic++;
/* XXX reimplement in terms of MUL/MAD (see t_vp_build.c) */
/* DP4 result.color.x, tmp0, matrow0; */
/* DP4 colorTemp.x, temp, matrow0; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_DP4;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].DstReg.File = PROGRAM_TEMPORARY;
inst[ic].DstReg.Index = colorTemp;
inst[ic].DstReg.WriteMask = WRITEMASK_X;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = 0;
inst[ic].SrcReg[0].Index = temp;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = row0_p;
ic++;
/* DP4 result.color.y, tmp0, matrow1; */
/* DP4 colorTemp.y, temp, matrow1; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_DP4;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].DstReg.File = PROGRAM_TEMPORARY;
inst[ic].DstReg.Index = colorTemp;
inst[ic].DstReg.WriteMask = WRITEMASK_Y;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = 0;
inst[ic].SrcReg[0].Index = temp;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = row1_p;
ic++;
/* DP4 result.color.z, tmp0, matrow2; */
/* DP4 colorTemp.z, temp, matrow2; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_DP4;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].DstReg.File = PROGRAM_TEMPORARY;
inst[ic].DstReg.Index = colorTemp;
inst[ic].DstReg.WriteMask = WRITEMASK_Z;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = 0;
inst[ic].SrcReg[0].Index = temp;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = row2_p;
ic++;
/* DP4 result.color.w, tmp0, matrow3; */
/* DP4 colorTemp.w, temp, matrow3; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_DP4;
inst[ic].DstReg.File = PROGRAM_OUTPUT;
inst[ic].DstReg.Index = FRAG_RESULT_COLR;
inst[ic].DstReg.File = PROGRAM_TEMPORARY;
inst[ic].DstReg.Index =colorTemp;
inst[ic].DstReg.WriteMask = WRITEMASK_W;
inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
inst[ic].SrcReg[0].Index = 0;
inst[ic].SrcReg[0].Index = temp;
inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
inst[ic].SrcReg[1].Index = row3_p;
ic++;
}
/* Modify last instruction's dst reg to write to result.color */
{
struct prog_instruction *last = &inst[ic - 1];
last->DstReg.File = PROGRAM_OUTPUT;
last->DstReg.Index = FRAG_RESULT_COLR;
}
/* END; */
_mesa_init_instructions(inst + ic, 1);
inst[ic].Opcode = OPCODE_END;