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r300/compiler: fix the saturate modifier when applied to TEX instructions

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This bug can only be triggered if the source texture is either signed or float.
(cherry picked from commit e4707604ab)
This commit is contained in:
Marek Olšák 2011-03-12 06:07:24 +01:00
parent 6ea13078fb
commit 90292b8001
1 changed files with 5 additions and 1 deletions
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6
src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c
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@ -401,17 +401,21 @@ int radeonTransformTEX(
}
}
/* Cannot write texture to output registers (all chips) or with masks (non-r500) */
/* Cannot write texture to output registers or with saturate (all chips),
* or with masks (non-r500). */
if (inst->U.I.Opcode != RC_OPCODE_KIL &&
(inst->U.I.DstReg.File != RC_FILE_TEMPORARY ||
inst->U.I.SaturateMode ||
(!c->is_r500 && inst->U.I.DstReg.WriteMask != RC_MASK_XYZW))) {
struct rc_instruction * inst_mov = rc_insert_new_instruction(c, inst);
inst_mov->U.I.Opcode = RC_OPCODE_MOV;
inst_mov->U.I.SaturateMode = inst->U.I.SaturateMode;
inst_mov->U.I.DstReg = inst->U.I.DstReg;
inst_mov->U.I.SrcReg[0].File = RC_FILE_TEMPORARY;
inst_mov->U.I.SrcReg[0].Index = rc_find_free_temporary(c);
inst->U.I.SaturateMode = 0;
inst->U.I.DstReg.File = RC_FILE_TEMPORARY;
inst->U.I.DstReg.Index = inst_mov->U.I.SrcReg[0].Index;
inst->U.I.DstReg.WriteMask = RC_MASK_XYZW;