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authorEric Anholt <[email protected]>2019-02-13 13:42:41 -0800
committerEric Anholt <[email protected]>2019-02-18 18:09:06 -0800
commit6186a8d44e954c35b32cd9628bb2de7e4ab271a8 (patch)
tree726c16bf7f8e530506ce7693f8eed020e55c3b39 /src
parent718eef62cb7f3379ea6c64c68d58f5fa613f08ac (diff)
v3d: Do bool-to-cond for discard_if as well.
Turns this minimal conditional discard (glsl-fs-discard-01.shader_test): 0x3de0b086c5fe9000 fcmp.pushn -, r1, r5; mov r2, 0 0x3dec3086bbfc001f nop ; mov.ifa r2, -1 0x3c047186bbe80000 nop ; mov.pushz -, r2 0x3dea3186ba837000 setmsf.ifna -, 0 ; nop into: 0x3c00b186c582a000 fcmp.pushn -, r2, r5; nop 0x3de83186ba837000 setmsf.ifa -, 0 ; nop total instructions in shared programs: 6229820 -> 6226247 (-0.06%)
Diffstat (limited to 'src')
-rw-r--r--src/broadcom/compiler/nir_to_vir.c28
1 files changed, 12 insertions, 16 deletions
diff --git a/src/broadcom/compiler/nir_to_vir.c b/src/broadcom/compiler/nir_to_vir.c
index dbd612f6682..c0a606d8ef5 100644
--- a/src/broadcom/compiler/nir_to_vir.c
+++ b/src/broadcom/compiler/nir_to_vir.c
@@ -1897,26 +1897,22 @@ ntq_emit_intrinsic(struct v3d_compile *c, nir_intrinsic_instr *instr)
break;
case nir_intrinsic_discard_if: {
- /* true (~0) if we're discarding */
- struct qreg cond = ntq_get_src(c, instr->src[0], 0);
+ enum v3d_qpu_cond cond = ntq_emit_bool_to_cond(c, instr->src[0]);
if (c->execute.file != QFILE_NULL) {
- /* execute == 0 means the channel is active. Invert
- * the condition so that we can use zero as "executing
- * and discarding."
- */
- vir_PF(c, vir_OR(c, c->execute, vir_NOT(c, cond)),
- V3D_QPU_PF_PUSHZ);
- vir_set_cond(vir_SETMSF_dest(c, vir_nop_reg(),
- vir_uniform_ui(c, 0)),
- V3D_QPU_COND_IFA);
- } else {
- vir_PF(c, cond, V3D_QPU_PF_PUSHZ);
- vir_set_cond(vir_SETMSF_dest(c, vir_nop_reg(),
- vir_uniform_ui(c, 0)),
- V3D_QPU_COND_IFNA);
+ struct qinst *exec_flag = vir_MOV_dest(c, vir_nop_reg(),
+ c->execute);
+ if (cond == V3D_QPU_COND_IFA) {
+ vir_set_uf(exec_flag, V3D_QPU_UF_ANDZ);
+ } else {
+ vir_set_uf(exec_flag, V3D_QPU_UF_NORNZ);
+ cond = V3D_QPU_COND_IFA;
+ }
}
+ vir_set_cond(vir_SETMSF_dest(c, vir_nop_reg(),
+ vir_uniform_ui(c, 0)), cond);
+
break;
}