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| author | Richard Henderson <richard.henderson@linaro.org> | 2025-01-14 13:58:39 -0800 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2025-04-28 13:40:17 -0700 |
| commit | 76f42780292c16a0d2f36cbbfbaf57495cd4d5e8 (patch) | |
| tree | 9fd19c976d38ce664cf8a61deae0dc1379848e91 /include | |
| parent | 3e3689df4e05eb76b64a9e45247d87f9dad03177 (diff) | |
| download | focaccia-qemu-76f42780292c16a0d2f36cbbfbaf57495cd4d5e8.tar.gz focaccia-qemu-76f42780292c16a0d2f36cbbfbaf57495cd4d5e8.zip | |
tcg: Add add/sub with carry opcodes and infrastructure
Liveness needs to track carry-live state in order to determine if the (hidden) output of the opcode is used. Code generation needs to track carry-live state in order to avoid clobbering cpu flags when loading constants. So far, output routines and backends are unchanged. Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/tcg/tcg-opc.h | 10 | ||||
| -rw-r--r-- | include/tcg/tcg.h | 13 |
2 files changed, 21 insertions, 2 deletions
diff --git a/include/tcg/tcg-opc.h b/include/tcg/tcg-opc.h index 1f995c54be..9cc20cd62c 100644 --- a/include/tcg/tcg-opc.h +++ b/include/tcg/tcg-opc.h @@ -82,6 +82,16 @@ DEF(shr, 1, 2, 0, TCG_OPF_INT) DEF(sub, 1, 2, 0, TCG_OPF_INT) DEF(xor, 1, 2, 0, TCG_OPF_INT) +DEF(addco, 1, 2, 0, TCG_OPF_INT | TCG_OPF_CARRY_OUT) +DEF(addc1o, 1, 2, 0, TCG_OPF_INT | TCG_OPF_CARRY_OUT) +DEF(addci, 1, 2, 0, TCG_OPF_INT | TCG_OPF_CARRY_IN) +DEF(addcio, 1, 2, 0, TCG_OPF_INT | TCG_OPF_CARRY_IN | TCG_OPF_CARRY_OUT) + +DEF(subbo, 1, 2, 0, TCG_OPF_INT | TCG_OPF_CARRY_OUT) +DEF(subb1o, 1, 2, 0, TCG_OPF_INT | TCG_OPF_CARRY_OUT) +DEF(subbi, 1, 2, 0, TCG_OPF_INT | TCG_OPF_CARRY_IN) +DEF(subbio, 1, 2, 0, TCG_OPF_INT | TCG_OPF_CARRY_IN | TCG_OPF_CARRY_OUT) + /* load/store */ DEF(ld8u_i32, 1, 1, 1, 0) DEF(ld8s_i32, 1, 1, 1, 0) diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h index c6b50b5226..aa300a2f8b 100644 --- a/include/tcg/tcg.h +++ b/include/tcg/tcg.h @@ -418,6 +418,11 @@ struct TCGContext { MemOp riscv_cur_vsew; TCGType riscv_cur_type; #endif + /* + * During the tcg_reg_alloc_op loop, we are within a sequence of + * carry-using opcodes like addco+addci. + */ + bool carry_live; GHashTable *const_table[TCG_TYPE_COUNT]; TCGTempSet free_temps[TCG_TYPE_COUNT]; @@ -749,13 +754,17 @@ enum { /* Instruction operands are vectors. */ TCG_OPF_VECTOR = 0x40, /* Instruction is a conditional branch. */ - TCG_OPF_COND_BRANCH = 0x80 + TCG_OPF_COND_BRANCH = 0x80, + /* Instruction produces carry out. */ + TCG_OPF_CARRY_OUT = 0x100, + /* Instruction consumes carry in. */ + TCG_OPF_CARRY_IN = 0x200, }; typedef struct TCGOpDef { const char *name; uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args; - uint8_t flags; + uint16_t flags; } TCGOpDef; extern const TCGOpDef tcg_op_defs[]; |