diff options
author | Brian Paul <brian.paul@tungstengraphics.com> | 2008-07-22 18:27:56 -0600 |
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committer | Brian Paul <brian.paul@tungstengraphics.com> | 2008-07-22 18:27:56 -0600 |
commit | 7f3d6e74817e8880a0712c85f2b41fd88cf6a347 (patch) | |
tree | 7b058447c29d4040cf3ad83f027d897083ae3a45 /src/mesa/shader/slang/slang_emit.c | |
parent | 0d1ed45cbfd555330c8746b0fc046bdb41d767d0 (diff) |
mesa: glsl: rework swizzle storage handling
Build on the heirarchal approach implemented for arrays/structs.
Diffstat (limited to 'src/mesa/shader/slang/slang_emit.c')
-rw-r--r-- | src/mesa/shader/slang/slang_emit.c | 57 |
1 files changed, 13 insertions, 44 deletions
diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c index dc02b2f491..912c325bb2 100644 --- a/src/mesa/shader/slang/slang_emit.c +++ b/src/mesa/shader/slang/slang_emit.c @@ -1505,57 +1505,18 @@ emit_cont_break_if_true(slang_emit_info *emitInfo, slang_ir_node *n) } -/** - * Return the number of components actually named by the swizzle. - * Recall that swizzles may have undefined/don't-care values. - */ -static GLuint -swizzle_size(GLuint swizzle) -{ - GLuint size = 0, i; - for (i = 0; i < 4; i++) { - GLuint swz = GET_SWZ(swizzle, i); - size += (swz >= 0 && swz <= 3); - } - return size; -} - - static struct prog_instruction * emit_swizzle(slang_emit_info *emitInfo, slang_ir_node *n) { - GLuint swizzle; struct prog_instruction *inst; inst = emit(emitInfo, n->Children[0]); - /* For debug: n->Var = n->Children[0]->Var; */ + /* setup storage info, if needed */ + if (!n->Store->Parent) + n->Store->Parent = n->Children[0]->Store; - /* "pull-up" the child's storage info, applying our swizzle info */ - n->Store->File = n->Children[0]->Store->File; - n->Store->Index = n->Children[0]->Store->Index; - n->Store->Size = swizzle_size(n->Store->Swizzle); -#if 0 - printf("Emit Swizzle %s reg %d chSize %d mySize %d\n", - _mesa_swizzle_string(n->Store->Swizzle, 0, 0), - n->Store->Index, n->Children[0]->Store->Size, - n->Store->Size); -#endif - - /* apply this swizzle to child's swizzle to get composed swizzle */ - swizzle = fix_swizzle(n->Store->Swizzle); /* remove the don't care terms */ - -#ifdef DEBUG - { - assert(GET_SWZ(swizzle, 0) != SWIZZLE_NIL); - assert(GET_SWZ(swizzle, 1) != SWIZZLE_NIL); - assert(GET_SWZ(swizzle, 2) != SWIZZLE_NIL); - assert(GET_SWZ(swizzle, 3) != SWIZZLE_NIL); - } -#endif - - n->Store->Swizzle = _slang_swizzle_swizzle(n->Children[0]->Store->Swizzle, - swizzle); + assert(n->Store->Parent); return inst; } @@ -1614,7 +1575,11 @@ emit_array_element(slang_emit_info *emitInfo, slang_ir_node *n) /* resolve new absolute storage location */ assert(n->Store); n->Store->File = root->File; - n->Store->Index = index; + if (root->File == PROGRAM_STATE_VAR) + n->Store->Index = 0; + else + n->Store->Index = index; + n->Store->Parent = NULL; } else { @@ -1639,6 +1604,10 @@ emit_array_element(slang_emit_info *emitInfo, slang_ir_node *n) n->Store->RelAddr = GL_TRUE; } + /* if array element size is one, make sure we only access X */ + if (n->Store->Size == 1) + n->Store->Swizzle = SWIZZLE_XXXX; + return NULL; /* no instruction */ } |