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nv50/ir: use round toward 0 when converting doubles to integers

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Like floats, we should use the round toward 0 mode instead of the
nearest one (which is the default) for doubles to integers.

This fixes all arb_gpu_shader_fp64 piglits which convert doubles to
integers (16 tests).

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "11.2 12.0" <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Samuel Pitoiset 2016-06-06 21:12:15 +02:00
parent 00e6899ae5
commit 08ddfe7b2f
1 changed files with 3 additions and 1 deletions
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4
src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
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@ -3598,7 +3598,9 @@ Converter::handleInstruction(const struct tgsi_full_instruction *insn)
src0 = fetchSrc(0, pos);
src1 = fetchSrc(0, pos + 1);
mkOp2(OP_MERGE, TYPE_U64, dreg, src0, src1);
mkCvt(OP_CVT, dstTy, dst0[c], srcTy, dreg);
Instruction *cvt = mkCvt(OP_CVT, dstTy, dst0[c], srcTy, dreg);
if (!isFloatType(dstTy))
cvt->rnd = ROUND_Z;
pos += 2;
}
break;