diff options
Diffstat (limited to 'src/gallium/auxiliary/tgsi/tgsi_sse2.c')
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_sse2.c | 50 |
1 files changed, 30 insertions, 20 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_sse2.c b/src/gallium/auxiliary/tgsi/tgsi_sse2.c index 2e13a7aaf9..a85cc4659e 100644 --- a/src/gallium/auxiliary/tgsi/tgsi_sse2.c +++ b/src/gallium/auxiliary/tgsi/tgsi_sse2.c @@ -2146,40 +2146,50 @@ emit_instruction( break; case TGSI_OPCODE_XPD: + /* Note: we do all stores after all operands have been fetched + * to avoid src/dst register aliasing issues for an instruction + * such as: XPD TEMP[2].xyz, TEMP[0], TEMP[2]; + */ if( IS_DST0_CHANNEL_ENABLED( *inst, CHAN_X ) || IS_DST0_CHANNEL_ENABLED( *inst, CHAN_Y ) ) { - FETCH( func, *inst, 1, 1, CHAN_Z ); - FETCH( func, *inst, 3, 0, CHAN_Z ); + FETCH( func, *inst, 1, 1, CHAN_Z ); /* xmm[1] = src[1].z */ + FETCH( func, *inst, 3, 0, CHAN_Z ); /* xmm[3] = src[0].z */ } if( IS_DST0_CHANNEL_ENABLED( *inst, CHAN_X ) || IS_DST0_CHANNEL_ENABLED( *inst, CHAN_Z ) ) { - FETCH( func, *inst, 0, 0, CHAN_Y ); - FETCH( func, *inst, 4, 1, CHAN_Y ); + FETCH( func, *inst, 0, 0, CHAN_Y ); /* xmm[0] = src[0].y */ + FETCH( func, *inst, 4, 1, CHAN_Y ); /* xmm[4] = src[1].y */ } IF_IS_DST0_CHANNEL_ENABLED( *inst, CHAN_X ) { - emit_MOV( func, 2, 0 ); - emit_mul( func, 2, 1 ); - emit_MOV( func, 5, 3 ); - emit_mul( func, 5, 4 ); - emit_sub( func, 2, 5 ); - STORE( func, *inst, 2, 0, CHAN_X ); + emit_MOV( func, 7, 0 ); /* xmm[7] = xmm[0] */ + emit_mul( func, 7, 1 ); /* xmm[7] = xmm[2] * xmm[1] */ + emit_MOV( func, 5, 3 ); /* xmm[5] = xmm[3] */ + emit_mul( func, 5, 4 ); /* xmm[5] = xmm[5] * xmm[4] */ + emit_sub( func, 7, 5 ); /* xmm[7] = xmm[2] - xmm[5] */ + /* store xmm[7] in dst.x below */ } if( IS_DST0_CHANNEL_ENABLED( *inst, CHAN_Y ) || IS_DST0_CHANNEL_ENABLED( *inst, CHAN_Z ) ) { - FETCH( func, *inst, 2, 1, CHAN_X ); - FETCH( func, *inst, 5, 0, CHAN_X ); + FETCH( func, *inst, 2, 1, CHAN_X ); /* xmm[2] = src[1].x */ + FETCH( func, *inst, 5, 0, CHAN_X ); /* xmm[5] = src[0].x */ } IF_IS_DST0_CHANNEL_ENABLED( *inst, CHAN_Y ) { - emit_mul( func, 3, 2 ); - emit_mul( func, 1, 5 ); - emit_sub( func, 3, 1 ); - STORE( func, *inst, 3, 0, CHAN_Y ); + emit_mul( func, 3, 2 ); /* xmm[3] = xmm[3] * xmm[2] */ + emit_mul( func, 1, 5 ); /* xmm[1] = xmm[1] * xmm[5] */ + emit_sub( func, 3, 1 ); /* xmm[3] = xmm[3] - xmm[1] */ + /* store xmm[3] in dst.y below */ } IF_IS_DST0_CHANNEL_ENABLED( *inst, CHAN_Z ) { - emit_mul( func, 5, 4 ); - emit_mul( func, 0, 2 ); - emit_sub( func, 5, 0 ); - STORE( func, *inst, 5, 0, CHAN_Z ); + emit_mul( func, 5, 4 ); /* xmm[5] = xmm[5] * xmm[4] */ + emit_mul( func, 0, 2 ); /* xmm[0] = xmm[0] * xmm[2] */ + emit_sub( func, 5, 0 ); /* xmm[5] = xmm[5] - xmm[0] */ + STORE( func, *inst, 5, 0, CHAN_Z ); /* dst.z = xmm[5] */ + } + IF_IS_DST0_CHANNEL_ENABLED( *inst, CHAN_X ) { + STORE( func, *inst, 7, 0, CHAN_X ); /* dst.x = xmm[7] */ + } + IF_IS_DST0_CHANNEL_ENABLED( *inst, CHAN_Y ) { + STORE( func, *inst, 3, 0, CHAN_Y ); /* dst.y = xmm[3] */ } IF_IS_DST0_CHANNEL_ENABLED( *inst, CHAN_W ) { emit_tempf( |