diff options
| -rw-r--r-- | src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c b/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c index 8ad2175eadf..654f9a070d5 100644 --- a/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c +++ b/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c @@ -273,6 +273,7 @@ static void ei_mad(struct r300_vertex_program_code *vp, struct rc_sub_instruction *vpi, unsigned int * inst) { + unsigned int i; /* Remarks about hardware limitations of MAD * (please preserve this comment, as this information is _NOT_ * in the documentation provided by AMD). @@ -318,6 +319,23 @@ static void ei_mad(struct r300_vertex_program_code *vp, t_dst_index(vp, &vpi->DstReg), t_dst_mask(vpi->DstReg.WriteMask), t_dst_class(vpi->DstReg.File)); + + /* Arguments with constant swizzles still count as a unique + * temporary, so we should make sure these arguments share a + * register index with one of the other arguments. */ + for (i = 0; i < 3; i++) { + unsigned int j; + if (vpi->SrcReg[i].File != RC_FILE_NONE) + continue; + + for (j = 0; j < 3; j++) { + if (i != j) { + vpi->SrcReg[i].Index = + vpi->SrcReg[j].Index; + break; + } + } + } } inst[1] = t_src(vp, &vpi->SrcReg[0]); inst[2] = t_src(vp, &vpi->SrcReg[1]); |