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| author | H. Peter Anvin <hpa@zytor.com> | 2018-11-26 21:38:14 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2018-11-26 21:38:14 -0800 |
| commit | d7498067ca06e01b73e9cca6712efa20c11b23b5 (patch) | |
| tree | 3e35226b7182b056cb10e1464fab5de5352323ea | |
| parent | 8fa279954c41f73eb7fd8fe3e0bf4a2546916193 (diff) | |
| download | nasm-d7498067ca06e01b73e9cca6712efa20c11b23b5.tar.gz | |
BR 3392368: actually fix the documentation; add test case
Add a mimimal test case for this bug; correct the documentation.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | doc/changes.src | 10 | ||||
| -rw-r--r-- | test/floatb.asm | 29 |
2 files changed, 29 insertions, 10 deletions
diff --git a/doc/changes.src b/doc/changes.src index a3bd0cc5..eab31a9c 100644 --- a/doc/changes.src +++ b/doc/changes.src @@ -20,11 +20,11 @@ macro. See \k{dfmtm}. operator refers to an \c{EXTERN} symbol declared further down in the code. -\b Fix a corner case in the floating-point code where a -binary/octal/hexadecimal floating-point constant starting with a digit -for which the upper bit is 1 (1, 4-7, 8-F respectively) and having at -least 33 mantissa bits would sometimes produce incorrect results for -the quad-precision format. +\b Fix a corner case in the floating-point code where a binary, octal +or hexadecimal floating-point constant starting with digits 1, 1-3, or +8-F, respectively, and having at least 32, 11, or 8 mantissa digits, +could produce incorrect results for the 80-bit and 128-bit +floating-point formats. \S{cl-2.14} Version 2.14 diff --git a/test/floatb.asm b/test/floatb.asm index a4235d08..68bf4aed 100644 --- a/test/floatb.asm +++ b/test/floatb.asm @@ -26,11 +26,30 @@ dq 0xd0b29a67e95dcb60 dw 0x4057 - do 0xf.ffffff8 - dt 0xf.ffffff8 - dq 0xf.ffffff8 - dd 0xf.ffffff8 - dw 0xf.ffffff8 + do 0xf.ffffff8p-4 + do 0q3.7777777774p-2 + do 0b1.1111_1111_1111_1111_1111_1111_1111_111p-1 + + dt 0xf.ffffff8p-4 + dt 0q3.7777777774p-2 + dt 0b1.1111_1111_1111_1111_1111_1111_1111_111p-1 + + dq 0xf.ffffff8p-4 + dq 0q3.7777777774p-2 + dq 0b1.1111_1111_1111_1111_1111_1111_1111_111p-1 + + dd 0xf.ffffff8p-4 + dd 0q3.7777777774p-2 + dd 0b1.1111_1111_1111_1111_1111_1111_1111_111p-1 + + dw 0xf.ffffff8p-4 + dw 0q3.7777777774p-2 + dw 0b1.1111_1111_1111_1111_1111_1111_1111_111p-1 + + db 0xf.ffffff8p-4 + db 0q3.7777777774p-2 + db 0b1.1111_1111_1111_1111_1111_1111_1111_111p-1 + ;; Way too big numbers, should overflow to +Inf dd 1.0E646456955 |