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tcg: Use sub carry opcodes to expand sub2

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Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2025-04-28 13:40:17 -07:00
parent c4d2e3d736
commit 7a89deae63
1 changed files with 27 additions and 2 deletions
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tcg/tcg-op.c
+27 -2
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@@ -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();