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Hexagon (target/hexagon) put writes to USR into temp until commit

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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

Test case added in tests/tcg/hexagon/overflow.c

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
This commit is contained in:
Taylor Simpson 2021-10-04 19:12:31 -05:00
parent f448397a51
commit b9dd6ff91d
6 changed files with 120 additions and 2 deletions
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9
target/hexagon/translate.c
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@ -204,7 +204,12 @@ 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]);
}
@ -230,6 +235,8 @@ 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)