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i965: Add support for OPCODE_SSG.

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The old compiler didn't use SSG, and instead emitted SGT/SGT/SUB.  We
can do a little better for SSG than we do for the SGT series.
This commit is contained in:
Eric Anholt
2010-06-30 17:05:11 -07:00
parent d6ebe9b16b
commit e558786a3e
5 changed files with 54 additions and 0 deletions
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src/mesa/drivers/dri/i965/brw_vs_emit.c
+20
View File
@@ -485,6 +485,23 @@ static void emit_cmp( struct brw_compile *p,
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
}
static void emit_sign(struct brw_vs_compile *c,
struct brw_reg dst,
struct brw_reg arg0)
{
struct brw_compile *p = &c->func;
brw_MOV(p, dst, brw_imm_f(0));
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_L, arg0, brw_imm_f(0));
brw_MOV(p, dst, brw_imm_f(-1.0));
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_G, arg0, brw_imm_f(0));
brw_MOV(p, dst, brw_imm_f(1.0));
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
}
static void emit_max( struct brw_compile *p,
struct brw_reg dst,
struct brw_reg arg0,
@@ -1719,6 +1736,9 @@ void brw_vs_emit(struct brw_vs_compile *c )
case OPCODE_SLE:
unalias2(c, dst, args[0], args[1], emit_sle);
break;
case OPCODE_SSG:
unalias1(c, dst, args[0], emit_sign);
break;
case OPCODE_SUB:
brw_ADD(p, dst, args[0], negate(args[1]));
break;
src/mesa/drivers/dri/i965/brw_wm.h
+4
View File
@@ -425,6 +425,10 @@ void emit_sop(struct brw_compile *p,
GLuint cond,
const struct brw_reg *arg0,
const struct brw_reg *arg1);
void emit_sign(struct brw_compile *p,
const struct brw_reg *dst,
GLuint mask,
const struct brw_reg *arg0);
void emit_tex(struct brw_wm_compile *c,
struct brw_reg *dst,
GLuint dst_flags,
src/mesa/drivers/dri/i965/brw_wm_emit.c
+26
View File
@@ -668,6 +668,28 @@ void emit_cmp(struct brw_compile *p,
}
}
void emit_sign(struct brw_compile *p,
const struct brw_reg *dst,
GLuint mask,
const struct brw_reg *arg0)
{
GLuint i;
for (i = 0; i < 4; i++) {
if (mask & (1<<i)) {
brw_MOV(p, dst[i], brw_imm_f(0.0));
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_L, arg0[i], brw_imm_f(0));
brw_MOV(p, dst[i], brw_imm_f(-1.0));
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_G, arg0[i], brw_imm_f(0));
brw_MOV(p, dst[i], brw_imm_f(1.0));
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
}
}
}
void emit_max(struct brw_compile *p,
const struct brw_reg *dst,
GLuint mask,
@@ -1673,6 +1695,10 @@ void brw_wm_emit( struct brw_wm_compile *c )
emit_sne(p, dst, dst_flags, args[0], args[1]);
break;
case OPCODE_SSG:
emit_sign(p, dst, dst_flags, args[0]);
break;
case OPCODE_LIT:
emit_lit(c, dst, dst_flags, args[0]);
break;
src/mesa/drivers/dri/i965/brw_wm_glsl.c
+3
View File
@@ -1971,6 +1971,9 @@ static void brw_wm_emit_glsl(struct brw_context *brw, struct brw_wm_compile *c)
emit_sop(p, dst, dst_flags,
BRW_CONDITIONAL_NEQ, args[0], args[1]);
break;
case OPCODE_SSG:
emit_sign(p, dst, dst_flags, args[0]);
break;
case OPCODE_MUL:
emit_alu2(p, brw_MUL, dst, dst_flags, args[0], args[1]);
break;
src/mesa/drivers/dri/i965/brw_wm_pass1.c
+1
View File
@@ -158,6 +158,7 @@ void brw_wm_pass1( struct brw_wm_compile *c )
case OPCODE_FLR:
case OPCODE_FRC:
case OPCODE_MOV:
case OPCODE_SSG:
case OPCODE_SWZ:
case OPCODE_TRUNC:
read0 = writemask;