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i965: Add support for OPCODE_CMP in the VS to fix GLSL sqrt()

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Bug #25628.  Fixes piglit case glsl-vs-sqrt-zero.
This commit is contained in:
Eric Anholt
2009-12-15 14:32:47 -08:00
parent 325f045c04
commit f06c8bd8dd
1 changed files with 14 additions and 0 deletions
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src/mesa/drivers/dri/i965/brw_vs_emit.c
+14
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@@ -392,6 +392,17 @@ static void emit_sge( struct brw_vs_compile *c,
emit_sop(c, dst, arg0, arg1, BRW_CONDITIONAL_GE);
}
static void emit_cmp( struct brw_compile *p,
struct brw_reg dst,
struct brw_reg arg0,
struct brw_reg arg1,
struct brw_reg arg2 )
{
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_L, arg0, brw_imm_f(0));
brw_SEL(p, dst, arg1, arg2);
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
}
static void emit_max( struct brw_compile *p,
struct brw_reg dst,
struct brw_reg arg0,
@@ -1485,6 +1496,9 @@ void brw_vs_emit(struct brw_vs_compile *c )
brw_MOV(p, brw_acc_reg(), args[2]);
brw_MAC(p, dst, args[0], args[1]);
break;
case OPCODE_CMP:
emit_cmp(p, dst, args[0], args[1], args[2]);
break;
case OPCODE_MAX:
emit_max(p, dst, args[0], args[1]);
break;