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i965/vs: Apply the gen6 math workaround for math1 instructions.

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Fixes glsl-vs-masked-cos.
This commit is contained in:
Eric Anholt
2011-08-05 20:16:21 -07:00
parent 2b7632aeaa
commit cda28bca0d
1 changed files with 4 additions and 6 deletions
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10
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
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@@ -122,14 +122,12 @@ vec4_visitor::emit_math1_gen6(enum opcode opcode, dst_reg dst, src_reg src)
{
/* The gen6 math instruction ignores the source modifiers --
* swizzle, abs, negate, and at least some parts of the register
* region description. Move the source to the corresponding slots
* of the destination generally work.
* region description.
*/
src_reg expanded = src_reg(this, glsl_type::float_type);
emit(BRW_OPCODE_MOV, dst, src);
src = expanded;
src_reg temp_src = src_reg(this, glsl_type::vec4_type);
emit(BRW_OPCODE_MOV, dst_reg(temp_src), src);
emit(opcode, dst, src);
emit(opcode, dst, temp_src);
}
void