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st_glsl_to_tgsi: use ISSG and fixup IABS 

It doesn't look like the GLSL compiler will produce sign op
for an unsigned anyways (seems insane anyways).

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2012-01-09 11:50:14 +00:00
parent b6cbc28533
commit cc94f0541c
1 changed files with 4 additions and 4 deletions
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8
src/mesa/state_tracker/st_glsl_to_tgsi.cpp
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@ -664,6 +664,9 @@ glsl_to_tgsi_visitor::get_opcode(ir_instruction *ir, unsigned op,
case3(SLT, ISLT, USLT);
case2iu(ISHR, USHR);
case2fi(SSG, ISSG);
case3(ABS, IABS, IABS);
default: break;
}
@ -1410,10 +1413,7 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
}
break;
case ir_unop_abs:
if (result_dst.type == GLSL_TYPE_INT || result_dst.type == GLSL_TYPE_UINT)
emit(ir, TGSI_OPCODE_IABS, result_dst, op[0]);
else
emit(ir, TGSI_OPCODE_ABS, result_dst, op[0]);
emit(ir, TGSI_OPCODE_ABS, result_dst, op[0]);
break;
case ir_unop_sign:
emit(ir, TGSI_OPCODE_SSG, result_dst, op[0]);