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[965] Fix inversion of SLT/SGE results in vertex programs.

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The WM code had this right, so copy its behavior.  This reverts a flipping
of the arguments to SLT in brw_vs_tnl which came in with the GLSL code that
probably occurred to work around the flipped results, and brings the code back
in line with t_vp_build.c.
This commit is contained in:
Eric Anholt 2008-01-16 15:07:10 -08:00
parent 6a5e86b344
commit 9bae03a583
2 changed files with 4 additions and 7 deletions
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9
src/mesa/drivers/dri/i965/brw_vs_emit.c
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@ -229,13 +229,10 @@ static void emit_sop( struct brw_compile *p,
struct brw_reg arg1,
GLuint cond)
{
brw_push_insn_state(p);
brw_CMP(p, brw_null_reg(), cond, arg0, arg1);
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
brw_MOV(p, dst, brw_imm_f(1.0f));
brw_set_predicate_control(p, BRW_PREDICATE_NORMAL);
brw_MOV(p, dst, brw_imm_f(0.0f));
brw_pop_insn_state(p);
brw_CMP(p, brw_null_reg(), cond, arg0, arg1);
brw_MOV(p, dst, brw_imm_f(1.0f));
brw_set_predicate_control_flag_value(p, 0xff);
}
static void emit_seq( struct brw_compile *p,

2
src/mesa/drivers/dri/i965/brw_vs_tnl.c
View file

@ -855,7 +855,7 @@ static struct ureg calculate_light_attenuation( struct tnl_program *p,
struct ureg slt = get_temp(p);
emit_op2(p, OPCODE_DP3, spot, 0, ureg_negate(VPpli), spot_dir_norm);
emit_op2(p, OPCODE_SLT, slt, 0, spot, swizzle1(spot_dir_norm,W));
emit_op2(p, OPCODE_SLT, slt, 0, swizzle1(spot_dir_norm,W), spot);
emit_op2(p, OPCODE_POW, spot, 0, spot, swizzle1(attenuation, W));
emit_op2(p, OPCODE_MUL, att, 0, slt, spot);