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Fix calculation of 2**30

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In exponent(), 'base *= base;' should not run
when base is 65536, since it overflows an int32_t.

This also optimizes exponent() based on
gcc and clang -O3 test cases in godbolt.org.
This commit is contained in:
Rangi
2021-02-17 09:25:02 -05:00
parent d049ffc0f0
commit 748e7dd4c7
3 changed files with 11 additions and 5 deletions
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4
test/asm/math.asm
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@@ -12,7 +12,9 @@ v equs "Y +"
ENDM
test (v 2)*(v 10)**(v 2)*(v 2) == (v 400)
test -(v 3)**(v 4) == v -81
test -(v 3)**(v 4) == (v -81)
test (v 1) << (v 30) == (v $4000_0000)
test (v 2)**(v 30) == (v $4000_0000)
assert DIV(5.0, 2.0) == 2.5
assert DIV(-5.0, 2.0) == -2.5