host-utils: add 128-bit quotient support to divu128/divs128

These will be used to implement new decimal floating point
instructions from Power ISA 3.1.

The remainder is now returned directly by divu128/divs128,
freeing up phigh to receive the high 64 bits of the quotient.

Signed-off-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211025191154.350831-4-luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 1 insertions, 5 deletions

diff --git a/include/hw/clock.h b/include/hw/clock.h
index 7443e6c4ab..5c927cee7f 100644
--- a/include/hw/clock.h
+++ b/include/hw/clock.h
@@ -323,11 +323,7 @@ static inline uint64_t clock_ns_to_ticks(const Clock *clk, uint64_t ns)
     if (clk->period == 0) {
         return 0;
     }
-    /*
-     * BUG: when CONFIG_INT128 is not defined, the current implementation of
-     * divu128 does not return a valid truncated quotient, so the result will
-     * be wrong.
-     */
+
     divu128(&lo, &hi, clk->period);
     return lo;
 }