@@ -62,7 +62,7 @@
reg_field_info[FIELD].offset)
#define SET_USR_FIELD(FIELD, VAL) \
- fINSERT_BITS(env->gpr[HEX_REG_USR], reg_field_info[FIELD].width, \
+ fINSERT_BITS(env->new_value[HEX_REG_USR], reg_field_info[FIELD].width, \
reg_field_info[FIELD].offset, (VAL))
#endif
@@ -64,6 +64,7 @@ DEF_ATTRIB(IMPLICIT_WRITES_P1, "Writes Predicate 1", "", "UREG.P1")
DEF_ATTRIB(IMPLICIT_WRITES_P2, "Writes Predicate 1", "", "UREG.P2")
DEF_ATTRIB(IMPLICIT_WRITES_P3, "May write Predicate 3", "", "UREG.P3")
DEF_ATTRIB(IMPLICIT_READS_PC, "Reads the PC register", "", "")
+DEF_ATTRIB(IMPLICIT_WRITES_USR, "May write USR", "", "")
DEF_ATTRIB(WRITES_PRED_REG, "Writes a predicate register", "", "")
DEF_ATTRIB(CRSLOT23, "Can execute in slot 2 or slot 3 (CR)", "", "")
@@ -210,7 +210,12 @@ static void mark_implicit_reg_write(DisasContext *ctx, Insn *insn,
int attrib, int rnum)
{
if (GET_ATTRIB(insn->opcode, attrib)) {
- bool is_predicated = GET_ATTRIB(insn->opcode, A_CONDEXEC);
+ /*
+ * USR is used to set overflow and FP exceptions,
+ * so treat it as conditional
+ */
+ bool is_predicated = GET_ATTRIB(insn->opcode, A_CONDEXEC) ||
+ rnum == HEX_REG_USR;
if (is_predicated && !is_preloaded(ctx, rnum)) {
tcg_gen_mov_tl(hex_new_value[rnum], hex_gpr[rnum]);
}
@@ -236,6 +241,8 @@ static void mark_implicit_reg_writes(DisasContext *ctx, Insn *insn)
mark_implicit_reg_write(ctx, insn, A_IMPLICIT_WRITES_SA0, HEX_REG_SA0);
mark_implicit_reg_write(ctx, insn, A_IMPLICIT_WRITES_LC1, HEX_REG_LC1);
mark_implicit_reg_write(ctx, insn, A_IMPLICIT_WRITES_SA1, HEX_REG_SA1);
+ mark_implicit_reg_write(ctx, insn, A_IMPLICIT_WRITES_USR, HEX_REG_USR);
+ mark_implicit_reg_write(ctx, insn, A_FPOP, HEX_REG_USR);
}
static void mark_implicit_pred_writes(DisasContext *ctx, Insn *insn)
@@ -73,6 +73,8 @@ def calculate_attribs():
add_qemu_macro_attrib('fWRITE_P1', 'A_WRITES_PRED_REG')
add_qemu_macro_attrib('fWRITE_P2', 'A_WRITES_PRED_REG')
add_qemu_macro_attrib('fWRITE_P3', 'A_WRITES_PRED_REG')
+ add_qemu_macro_attrib('fSET_OVERFLOW', 'A_IMPLICIT_WRITES_USR')
+ add_qemu_macro_attrib('fSET_LPCFG', 'A_IMPLICIT_WRITES_USR')
# Recurse down macros, find attributes from sub-macros
macroValues = list(macros.values())
Change SET_USR_FIELD to write to hex_new_value[HEX_REG_USR] instead of hex_gpr[HEX_REG_USR]. Then, we need code to mark the instructions that can set implicitly set USR - Macros added to hex_common.py - A_FPOP added in translate.c Signed-off-by: Taylor Simpson <tsimpson@quicinc.com> --- target/hexagon/macros.h | 2 +- target/hexagon/attribs_def.h.inc | 1 + target/hexagon/translate.c | 9 ++++++++- target/hexagon/hex_common.py | 2 ++ 4 files changed, 12 insertions(+), 2 deletions(-)