diff options
| author | Eric Anholt <eric@anholt.net> | 2010-03-10 15:32:05 -0800 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-03-12 15:12:01 -0800 |
| commit | ba541b0769768ffa09562938d3b49690669948b8 (patch) | |
| tree | 853f4bdb86ffb9bec82f5f5c2880347ab643e319 /src | |
| parent | 13a13fcb8054ed2d1138f6754fc67b014cc5cd5d (diff) | |
i965: Use the SEL instruction to implement MIN and MAX.
Saves an instruction over doing conditional moves.
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm_emit.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c index 412e09b76a..b169576017 100644 --- a/src/mesa/drivers/dri/i965/brw_wm_emit.c +++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c @@ -633,14 +633,10 @@ void emit_max(struct brw_compile *p, for (i = 0; i < 4; i++) { if (mask & (1<<i)) { - brw_set_saturate(p, (mask & SATURATE) ? 1 : 0); - brw_MOV(p, dst[i], arg0[i]); - brw_set_saturate(p, 0); - - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_L, arg0[i], arg1[i]); + brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_GE, arg0[i], arg1[i]); brw_set_saturate(p, (mask & SATURATE) ? 1 : 0); - brw_MOV(p, dst[i], arg1[i]); + brw_SEL(p, dst[i], arg0[i], arg1[i]); brw_set_saturate(p, 0); brw_set_predicate_control_flag_value(p, 0xff); } @@ -657,14 +653,10 @@ void emit_min(struct brw_compile *p, for (i = 0; i < 4; i++) { if (mask & (1<<i)) { - brw_set_saturate(p, (mask & SATURATE) ? 1 : 0); - brw_MOV(p, dst[i], arg1[i]); - brw_set_saturate(p, 0); - brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_L, arg0[i], arg1[i]); brw_set_saturate(p, (mask & SATURATE) ? 1 : 0); - brw_MOV(p, dst[i], arg0[i]); + brw_SEL(p, dst[i], arg0[i], arg1[i]); brw_set_saturate(p, 0); brw_set_predicate_control_flag_value(p, 0xff); } |