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| author | Richard Henderson <richard.henderson@linaro.org> | 2025-01-14 18:58:05 -0800 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2025-04-28 13:40:17 -0700 |
| commit | 7a89deae635ceaf687973dd95e4714af27a3f9d2 (patch) | |
| tree | 638abec05461e191544f78dc9f7bc922c1ca3813 | |
| parent | c4d2e3d736197bb2d82bd37de0de1819222d9768 (diff) | |
| download | qemu-7a89deae635ceaf687973dd95e4714af27a3f9d2.zip qemu-7a89deae635ceaf687973dd95e4714af27a3f9d2.tar.gz qemu-7a89deae635ceaf687973dd95e4714af27a3f9d2.tar.bz2 | |
tcg: Use sub carry opcodes to expand sub2
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| -rw-r--r-- | tcg/tcg-op.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index f17ec65..447b0eb 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -1126,7 +1126,13 @@ void tcg_gen_add2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 al, void tcg_gen_sub2_i32(TCGv_i32 rl, TCGv_i32 rh, TCGv_i32 al, TCGv_i32 ah, TCGv_i32 bl, TCGv_i32 bh) { - if (TCG_TARGET_HAS_sub2_i32) { + if (tcg_op_supported(INDEX_op_subbi, TCG_TYPE_I32, 0)) { + TCGv_i32 t0 = tcg_temp_ebb_new_i32(); + tcg_gen_op3_i32(INDEX_op_subbo, t0, al, bl); + tcg_gen_op3_i32(INDEX_op_subbi, rh, ah, bh); + tcg_gen_mov_i32(rl, t0); + tcg_temp_free_i32(t0); + } else if (TCG_TARGET_HAS_sub2_i32) { tcg_gen_op6_i32(INDEX_op_sub2_i32, rl, rh, al, ah, bl, bh); } else { TCGv_i32 t0 = tcg_temp_ebb_new_i32(); @@ -2865,7 +2871,26 @@ void tcg_gen_add2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al, void tcg_gen_sub2_i64(TCGv_i64 rl, TCGv_i64 rh, TCGv_i64 al, TCGv_i64 ah, TCGv_i64 bl, TCGv_i64 bh) { - if (TCG_TARGET_HAS_sub2_i64) { + if (tcg_op_supported(INDEX_op_subbi, TCG_TYPE_REG, 0)) { + TCGv_i64 t0 = tcg_temp_ebb_new_i64(); + + if (TCG_TARGET_REG_BITS == 32) { + tcg_gen_op3_i32(INDEX_op_subbo, TCGV_LOW(t0), + TCGV_LOW(al), TCGV_LOW(bl)); + tcg_gen_op3_i32(INDEX_op_subbio, TCGV_HIGH(t0), + TCGV_HIGH(al), TCGV_HIGH(bl)); + tcg_gen_op3_i32(INDEX_op_subbio, TCGV_LOW(rh), + TCGV_LOW(ah), TCGV_LOW(bh)); + tcg_gen_op3_i32(INDEX_op_subbi, TCGV_HIGH(rh), + TCGV_HIGH(ah), TCGV_HIGH(bh)); + } else { + tcg_gen_op3_i64(INDEX_op_subbo, t0, al, bl); + tcg_gen_op3_i64(INDEX_op_subbi, rh, ah, bh); + } + + tcg_gen_mov_i64(rl, t0); + tcg_temp_free_i64(t0); + } else if (TCG_TARGET_HAS_sub2_i64) { tcg_gen_op6_i64(INDEX_op_sub2_i64, rl, rh, al, ah, bl, bh); } else { TCGv_i64 t0 = tcg_temp_ebb_new_i64(); |