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move normalise function, add lowbits param, call it
author
Luke Kenneth Casson Leighton
<lkcl@lkcl.net>
Tue, 30 Apr 2019 20:54:18 +0000
(21:54 +0100)
committer
Luke Kenneth Casson Leighton
<lkcl@lkcl.net>
Tue, 30 Apr 2019 20:54:18 +0000
(21:54 +0100)
src/add/fsqrt.py
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diff --git
a/src/add/fsqrt.py
b/src/add/fsqrt.py
index 8e11666705d85aedcdae3c07fa9bb76faee1994f..02449b0f75b41b0ba2e004711d9570ccca49ca3d 100644
(file)
--- a/
src/add/fsqrt.py
+++ b/
src/add/fsqrt.py
@@
-80,6
+80,15
@@
def main(mantissa, exponent):
return m, r, exponent >> 1
return m, r, exponent >> 1
+#normalization function
+def normalise(s, m, e, lowbits):
+ if (lowbits >= 2):
+ m += 1
+ if get_mantissa(m) == ((1<<24)-1):
+ e += 1
+ return s, m, e
+
+
def fsqrt_test(x):
xbits = x.bits
def fsqrt_test(x):
xbits = x.bits
@@
-99,6
+108,9
@@
def fsqrt_test(x):
sm >>= 2
sm = get_mantissa(sm)
#sm += 2
sm >>= 2
sm = get_mantissa(sm)
#sm += 2
+
+ s, sm, se = normalise(s, sm, se, lowbits)
+
print("our sqrt", s, se, sm, hex(sm), bin(sm), "lowbits", lowbits,
"rem", hex(sr))
if lowbits >= 2:
print("our sqrt", s, se, sm, hex(sm), bin(sm), "lowbits", lowbits,
"rem", hex(sr))
if lowbits >= 2:
@@
-141,13
+153,6
@@
if __name__ == '__main__':
fsqrt_test(x)
fsqrt_test(x)
-#normalization function
-def normalise(s, m, e):
- if (lowbits >= 2):
- m += 1
- if get_mantissa(m) == ((1<<24)-1):
- e += 1
-
"""
"""