etnaviv: isa: Add rouding to etna_inst

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28183>

src/etnaviv/isa/asm.h

@@ -56,6 +56,7 @@ struct etna_inst_src {
 struct etna_inst {
    enum isa_opc opcode;
    enum isa_type type;
+   enum isa_rounding rounding;
    enum isa_cond cond : 5;
    unsigned sat       : 1;                 /* saturate result between 0..1 */
    unsigned sel_bit0  : 1;                 /* select low half mediump */

src/gallium/drivers/etnaviv/etnaviv_compiler_nir_emit.c

@@ -154,8 +154,10 @@ etna_emit_alu(struct etna_compile *c, nir_op op, struct etna_inst_dst dst,
    case nir_op_flog2:
    case nir_op_fsin:
    case nir_op_fcos:
-      if (c->specs->has_new_transcendentals)
+      if (c->specs->has_new_transcendentals) {
          inst.tex.amode = 1;
+         inst.rounding = ISA_ROUNDING_RTZ;
+      }
       FALLTHROUGH;
    case nir_op_frsq:
    case nir_op_frcp: