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Diffstat (limited to 'src/compiler/nir/nir_lower_idiv.c')
-rw-r--r--src/compiler/nir/nir_lower_idiv.c48
1 files changed, 23 insertions, 25 deletions
diff --git a/src/compiler/nir/nir_lower_idiv.c b/src/compiler/nir/nir_lower_idiv.c
index 96e9412c80e..c59a3eb8b3d 100644
--- a/src/compiler/nir/nir_lower_idiv.c
+++ b/src/compiler/nir/nir_lower_idiv.c
@@ -39,7 +39,7 @@
static bool
convert_instr(nir_builder *bld, nir_alu_instr *alu)
{
- nir_ssa_def *numer, *denom, *af, *bf, *a, *b, *q, *r;
+ nir_ssa_def *numer, *denom, *af, *bf, *a, *b, *q, *r, *rt;
nir_op op = alu->op;
bool is_signed;
@@ -97,35 +97,33 @@ convert_instr(nir_builder *bld, nir_alu_instr *alu)
/* correction: if modulus >= divisor, add 1 */
r = nir_imul(bld, q, b);
r = nir_isub(bld, a, r);
+ rt = nir_uge(bld, r, b);
- r = nir_uge(bld, r, b);
- r = nir_b2i32(bld, r);
-
- q = nir_iadd(bld, q, r);
- if (is_signed) {
- /* fix the sign: */
- r = nir_ixor(bld, numer, denom);
- r = nir_ilt(bld, r, nir_imm_int(bld, 0));
- b = nir_ineg(bld, q);
- q = nir_bcsel(bld, r, b, q);
-
- if (op == nir_op_imod || op == nir_op_irem) {
- q = nir_imul(bld, q, denom);
- q = nir_isub(bld, numer, q);
- if (op == nir_op_imod) {
- q = nir_bcsel(bld, nir_ieq(bld, q, nir_imm_int(bld, 0)),
- nir_imm_int(bld, 0),
- nir_bcsel(bld, r, nir_iadd(bld, q, denom), q));
+ if (op == nir_op_umod) {
+ q = nir_bcsel(bld, rt, nir_isub(bld, r, b), r);
+ } else {
+ r = nir_b2i32(bld, rt);
+
+ q = nir_iadd(bld, q, r);
+ if (is_signed) {
+ /* fix the sign: */
+ r = nir_ixor(bld, numer, denom);
+ r = nir_ilt(bld, r, nir_imm_int(bld, 0));
+ b = nir_ineg(bld, q);
+ q = nir_bcsel(bld, r, b, q);
+
+ if (op == nir_op_imod || op == nir_op_irem) {
+ q = nir_imul(bld, q, denom);
+ q = nir_isub(bld, numer, q);
+ if (op == nir_op_imod) {
+ q = nir_bcsel(bld, nir_ieq(bld, q, nir_imm_int(bld, 0)),
+ nir_imm_int(bld, 0),
+ nir_bcsel(bld, r, nir_iadd(bld, q, denom), q));
+ }
}
}
}
- if (op == nir_op_umod) {
- /* division result in q */
- r = nir_imul(bld, q, b);
- q = nir_isub(bld, a, r);
- }
-
assert(alu->dest.dest.is_ssa);
nir_ssa_def_rewrite_uses(&alu->dest.dest.ssa, nir_src_for_ssa(q));