| author | Paul Cercueil <paul@crapouillou.net> | 2023年10月03日 23:36:38 +0200 |
|---|---|---|
| committer | pcpa <paulo.cesar.pereira.de.andrade@gmail.com> | 2023年10月04日 14:31:38 -0300 |
| commit | 928cd32ce67bc83480009090506b1f7661ad44ee (patch) | |
| tree | da023a30be6f59e883f257b66305a40a70d343b3 /lib/jit_mips-cpu.c | |
| parent | 1a76e90c58ca6aa9ca8691230d8c99cf39f7e5e4 (diff) | |
| download | lightning-928cd32ce67bc83480009090506b1f7661ad44ee.tar.gz | |
| -rw-r--r-- | lib/jit_mips-cpu.c | 79 |
diff --git a/lib/jit_mips-cpu.c b/lib/jit_mips-cpu.c index e59743e..cfbcd7e 100644 --- a/lib/jit_mips-cpu.c +++ b/lib/jit_mips-cpu.c @@ -2425,72 +2425,47 @@ static void _xrshr(jit_state_t *_jit, jit_bool_t sign, jit_int32_t r0, jit_int32_t r1, jit_int32_t r2, jit_int32_t r3) { - jit_bool_t branch; - jit_word_t over, zero, done, done_over; - jit_int32_t t0, s0, t1, s1, t2, s2, t3, s3; + jit_int32_t t0, s0, t2, s2, t3, s3; s0 = jit_get_reg(jit_class_gpr); t0 = rn(s0); if (r0 == r2 || r1 == r2) { - s2 = jit_get_reg(jit_class_gpr); - t2 = rn(s2); - movr(t2, r2); + s2 = jit_get_reg(jit_class_gpr); + t2 = rn(s2); + movr(t2, r2); } else - t2 = r2; + t2 = r2; if (r0 == r3 || r1 == r3) { - s3 = jit_get_reg(jit_class_gpr); - t3 = rn(s3); - movr(t3, r3); + s3 = jit_get_reg(jit_class_gpr); + t3 = rn(s3); + movr(t3, r3); } else - t3 = r3; - if ((s1 = jit_get_reg(jit_class_gpr|jit_class_nospill|jit_class_chk))) { - t1 = rn(s1); - branch = 0; + t3 = r3; + + if (sign) { + /* underflow? */ + eqi(t0, t3, __WORDSIZE); + subr(t0, t3, t0); + rshr(r0, t2, t0); + } else { + /* underflow? */ + nei(t0, t3, __WORDSIZE); + rshr_u(r0, t2, t3); + movzr(r0, t0, t0); } - else - branch = 1; + rsbi(t0, t3, __WORDSIZE); - if (sign) - rshr(r0, t2, t3); - else - rshr_u(r0, t2, t3); lshr(r1, t2, t0); - if (branch) { - zero = beqi(_jit->pc.w, t3, 0); - over = beqi(_jit->pc.w, t3, __WORDSIZE); - done = jmpi(_jit->pc.w, 1); - flush(); - patch_at(over, _jit->pc.w); - /* underflow */ - if (sign) - rshi(r0, t2, __WORDSIZE - 1); - else - movi(r0, 0); - done_over = jmpi(_jit->pc.w, 1); - /* zero */ - flush(); - patch_at(zero, _jit->pc.w); - movi(r1, 0); - flush(); - patch_at(done, _jit->pc.w); - patch_at(done_over, _jit->pc.w); - jit_unget_reg(s1); - } - else { - /* zero? */ - movi(t0, 0); - movzr(r1, t0, t3); - /* underflow? */ - eqi(t1, t3, __WORDSIZE); - movnr(r0, t0, t1); - jit_unget_reg(s1); - } + + /* zero? */ + movzr(r1, t3, t3); + jit_unget_reg(s0); if (t2 != r2) - jit_unget_reg(s2); + jit_unget_reg(s2); if (t3 != r3) - jit_unget_reg(s3); + jit_unget_reg(s3); } static void |