AlexIndustrial/mesa
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

svga: test register W component in emit_kil()

Browse Source 
Only the XYZ components are checked to be negative by SVGA3DOP_TEXKILL.
GL_ARB_fp requires all four components be checked.  Emit a second texkill
for W if needed.
This commit is contained in:
Brian Paul
2011-07-27 09:13:32 -06:00
parent 7d09df0cbc
commit 2b2a69e088
1 changed files with 43 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/gallium/drivers/svga/svga_tgsi_insn.c
+43 -15
View File
@@ -1225,28 +1225,56 @@ static boolean emit_sub(struct svga_shader_emitter *emit,
static boolean emit_kil(struct svga_shader_emitter *emit,
const struct tgsi_full_instruction *insn )
{
SVGA3dShaderInstToken inst;
const struct tgsi_full_src_register *reg = &insn->Src[0];
struct src_register src0;
struct src_register src0, srcIn;
/* is the W component tested in another position? */
const boolean w_tested = (reg->Register.SwizzleW == reg->Register.SwizzleX ||
reg->Register.SwizzleW == reg->Register.SwizzleY ||
reg->Register.SwizzleW == reg->Register.SwizzleZ);
const boolean special = (reg->Register.Absolute ||
reg->Register.Negate ||
reg->Register.Indirect ||
reg->Register.SwizzleX != 0 ||
reg->Register.SwizzleY != 1 ||
reg->Register.SwizzleZ != 2 ||
reg->Register.File != TGSI_FILE_TEMPORARY);
SVGA3dShaderDestToken temp;
inst = inst_token( SVGA3DOP_TEXKILL );
src0 = translate_src_register( emit, reg );
src0 = srcIn = translate_src_register( emit, reg );
if (reg->Register.Absolute ||
reg->Register.Negate ||
reg->Register.Indirect ||
reg->Register.SwizzleX != 0 ||
reg->Register.SwizzleY != 1 ||
reg->Register.SwizzleZ != 2 ||
reg->Register.File != TGSI_FILE_TEMPORARY)
{
SVGA3dShaderDestToken temp = get_temp( emit );
if (special || !w_tested) {
/* need a temp reg */
temp = get_temp( emit );
}
if (special) {
/* move the source into a temp register */
submit_op1( emit, inst_token( SVGA3DOP_MOV ),
writemask( temp, TGSI_WRITEMASK_XYZ ),
src0 );
submit_op1( emit, inst_token( SVGA3DOP_MOV ), temp, src0 );
src0 = src( temp );
}
return submit_op0( emit, inst, dst(src0) );
/* do the texkill (on the xyz components) */
if (!submit_op0( emit, inst_token( SVGA3DOP_TEXKILL ), dst(src0) ))
return FALSE;
if (!w_tested) {
/* need to emit a second texkill to test the W component */
/* put src.wwww into temp register */
if (!submit_op1(emit,
inst_token( SVGA3DOP_MOV ),
writemask( temp, TGSI_WRITEMASK_XYZ ),
scalar(srcIn, TGSI_SWIZZLE_W)))
return FALSE;
/* second texkill */
if (!submit_op0( emit, inst_token( SVGA3DOP_TEXKILL ), temp ))
return FALSE;
}
return TRUE;
}