From: Jose Maria Casanova Crespo <jmcasan...@igalia.com>
SpvOpFConvert now manages the FPRoundingMode decorator for the
returning values enabling the nir_rounding_mode in the conversion
operation to fp16 values.
v2: Fixed breaking of specialization constants. (Jason Ekstrand)
---
src/compiler/spirv/vtn_alu.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/src/compiler/spirv/vtn_alu.c b/src/compiler/spirv/vtn_alu.c
index 7ec30b8a631..b7e1b728895 100644
--- a/src/compiler/spirv/vtn_alu.c
+++ b/src/compiler/spirv/vtn_alu.c
@@ -381,6 +381,26 @@ handle_no_contraction(struct vtn_builder *b, struct
vtn_value *val, int member,
b->nb.exact = true;
}
+static void
+handle_rounding_mode(struct vtn_builder *b, struct vtn_value *val, int member,
+ const struct vtn_decoration *dec, void
*_out_rounding_mode)
+{
+ assert(dec->scope == VTN_DEC_DECORATION);
+ if (dec->decoration != SpvDecorationFPRoundingMode)
+ return;
+ switch (dec->literals[0]) {
+ case SpvFPRoundingModeRTE:
+ *((nir_rounding_mode *) _out_rounding_mode) = nir_rounding_mode_rtne;
+ break;
+ case SpvFPRoundingModeRTZ:
+ *((nir_rounding_mode *) _out_rounding_mode) = nir_rounding_mode_rtz;
+ break;
+ default:
+ unreachable("Not supported rounding mode");
+ break;
+ }
+}
+
void
vtn_handle_alu(struct vtn_builder *b, SpvOp opcode,
const uint32_t *w, unsigned count)
@@ -568,6 +588,18 @@ vtn_handle_alu(struct vtn_builder *b, SpvOp opcode,
vtn_handle_bitcast(b, val->ssa, src[0]);
break;
+ case SpvOpFConvert: {
+ nir_alu_type src_alu_type =
nir_get_nir_type_for_glsl_type(vtn_src[0]->type);
+ nir_alu_type dst_alu_type = nir_get_nir_type_for_glsl_type(type);
+ nir_rounding_mode rounding_mode = nir_rounding_mode_undef;
+
+ vtn_foreach_decoration(b, val, handle_rounding_mode, &rounding_mode);
+ nir_op op = nir_type_conversion_op(src_alu_type, dst_alu_type,
rounding_mode);
+
+ val->ssa->def = nir_build_alu(&b->nb, op, src[0], src[1], NULL, NULL);
+ break;
+ }
+
default: {
bool swap;
nir_alu_type src_alu_type =
nir_get_nir_type_for_glsl_type(vtn_src[0]->type);
--
2.11.0
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