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i965/vec4: Add non-mutating helper functions to modify src_reg::swizzle and ::negate.

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Reviewed-by: Paul Berry <stereotype441@gmail.com>
This commit is contained in:
Francisco Jerez
2014-02-19 15:20:27 +01:00
parent 2337820d49
commit 98306e727b
1 changed files with 24 additions and 0 deletions
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src/mesa/drivers/dri/i965/brw_vec4.h
+24
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@@ -148,6 +148,30 @@ offset(src_reg reg, unsigned delta)
return reg;
}
/**
* Reswizzle a given source register.
* \sa brw_swizzle().
*/
static inline src_reg
swizzle(src_reg reg, unsigned swizzle)
{
assert(reg.file != HW_REG);
reg.swizzle = BRW_SWIZZLE4(
BRW_GET_SWZ(reg.swizzle, BRW_GET_SWZ(swizzle, 0)),
BRW_GET_SWZ(reg.swizzle, BRW_GET_SWZ(swizzle, 1)),
BRW_GET_SWZ(reg.swizzle, BRW_GET_SWZ(swizzle, 2)),
BRW_GET_SWZ(reg.swizzle, BRW_GET_SWZ(swizzle, 3)));
return reg;
}
static inline src_reg
negate(src_reg reg)
{
assert(reg.file != HW_REG && reg.file != IMM);
reg.negate = !reg.negate;
return reg;
}
class dst_reg : public reg
{
public: