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i965/fs: Fix misleading comment regarding the message header in emit_texture_gen7.

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This hasn't been overallocating space for the header for a long time.
It still leaves the header uninitialized though until the generator
fixes it.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Francisco Jerez 2015-07-24 16:41:19 +03:00
parent fc2273a340
commit a69332a312
1 changed files with 3 additions and 2 deletions
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5
src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
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@ -473,8 +473,9 @@ fs_visitor::emit_texture_gen7(ir_texture_opcode op, fs_reg dst,
if (op == ir_tg4 || offset_value.file != BAD_FILE ||
is_high_sampler(devinfo, sampler)) {
/* For general texture offsets (no txf workaround), we need a header to
* put them in. Note that for SIMD16 we're making space for two actual
* hardware registers here, so the emit will have to fix up for this.
* put them in. Note that we're only reserving space for it in the
* message payload as it will be initialized implicitly by the
* generator.
*
* * ir4_tg4 needs to place its channel select in the header,
* for interaction with ARB_texture_swizzle