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tnl: Optimize SSE load[23]f_1 since they don't need the identity swizzle.

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SSE movss from memory zeroes out everything above the destination dword, so
we get the (a, 0) or (a, 0, 0) result that these functions needed.

Bug #16520.
This commit is contained in:
Guillaume Melquiond 2008-12-09 13:10:56 -08:00 • committed by Eric Anholt
parent 6e29a3c8e2
commit b66495a0d9
1 changed files with 4 additions and 2 deletions
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6
src/mesa/tnl/t_vertex_sse.c
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@ -146,7 +146,8 @@ static void emit_load3f_1( struct x86_program *p,
struct x86_reg dest,
struct x86_reg arg0 )
{
emit_load4f_1(p, dest, arg0);
/* Loading from memory erases the upper bits. */
sse_movss(&p->func, dest, arg0);
}
static void emit_load2f_2( struct x86_program *p,
@ -160,7 +161,8 @@ static void emit_load2f_1( struct x86_program *p,
struct x86_reg dest,
struct x86_reg arg0 )
{
emit_load4f_1(p, dest, arg0);
/* Loading from memory erases the upper bits. */
sse_movss(&p->func, dest, arg0);
}
static void emit_load1f_1( struct x86_program *p,