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fpu: Pass float_status to floatx80_is_infinity()

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Unlike the other float formats, whether a floatx80 value is
considered to be an Infinity is target-dependent.  (On x86 if the
explicit integer bit is clear this is a "pseudo-infinity" and not a
valid infinity; m68k does not care about the value of the integer
bit.)

Currently we select this target-specific logic at compile time with
an ifdef.  We're going to want to do this at runtime, so change the
floatx80_is_infinity() function to take a float_status.

This commit doesn't change any logic; we'll do that in the
next commit.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250224111524.1101196-5-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2025-02-24 11:15:16 +00:00
parent 165ce008d7
commit 9ea6d1f141
3 changed files with 13 additions and 11 deletions
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2
include/fpu/softfloat.h
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@ -996,7 +996,7 @@ static inline floatx80 floatx80_chs(floatx80 a)
return a;
}
static inline bool floatx80_is_infinity(floatx80 a)
static inline bool floatx80_is_infinity(floatx80 a, float_status *status)
{
#if defined(TARGET_M68K)
return (a.high & 0x7fff) == floatx80_infinity.high && !(a.low << 1);