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Zero-extend UFLOAT operand first

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Otherwise, int2float would consider the MSB a sign.
This commit is contained in:
Sebastian Schmidt
2020-01-04 18:14:02 +01:00
parent 66fc608881
commit 9a837fe2dd
1 changed files with 3 additions and 2 deletions
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5
data/languages/xtensaInstructions.sinc
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@@ -1202,9 +1202,10 @@ macro extract_bit(val, bit, result) {
br = nan(fs) || nan(ft) || fs f== ft;
}
# UFLOAT.S - Convert Unsigned Fixed to Single, pg. 550. XXX: How is this different from float.as?
# UFLOAT.S - Convert Unsigned Fixed to Single, pg. 550.
:ufloat.s fr, as, u4_4.7 is op2 = 0b1101 & op1 = 0b1010 & fr & as & u4_4.7 & op0 = 0 {
local f = int2float(as);
local tmp:8 = zext(as);
local f = int2float(tmp);
local d = int2float(1:2 << u4_4.7:2);
fr = d f/ f;
}