diff options
| -rw-r--r-- | src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp index f4870a1c606..0daf5a14285 100644 --- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp +++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp @@ -2897,7 +2897,15 @@ glsl_to_tgsi_visitor::emit_block_mov(ir_assignment *ir, const struct glsl_type * r->type = type->base_type; if (cond) { st_src_reg l_src = st_src_reg(*l); - l_src.swizzle = swizzle_for_size(type->vector_elements); + + if (l_src.file == PROGRAM_OUTPUT && + this->prog->Target == GL_FRAGMENT_PROGRAM_ARB && + (l_src.index == FRAG_RESULT_DEPTH || l_src.index == FRAG_RESULT_STENCIL)) { + /* This is a special case because the source swizzles will be shifted + * later to account for the difference between GLSL (where they're + * plain floats) and TGSI (where they're Z and Y components). */ + l_src.swizzle = SWIZZLE_XXXX; + } if (native_integers) { emit_asm(ir, TGSI_OPCODE_UCMP, *l, *cond, |