Module: Mesa Branch: master Commit: ba541b0769768ffa09562938d3b49690669948b8 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ba541b0769768ffa09562938d3b49690669948b8
Author: Eric Anholt <[email protected]> Date: Wed Mar 10 15:32:05 2010 -0800 i965: Use the SEL instruction to implement MIN and MAX. Saves an instruction over doing conditional moves. --- 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 412e09b..b169576 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); } _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
