From 6603d50648901e8b9e6d66ec1142accf0b1df1e6 Mon Sep 17 00:00:00 2001 From: Petr Tesarik Date: Fri, 11 May 2018 09:10:52 +0200 Subject: fpu/softfloat: Fix conversion from uint64 to float128 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The significand is passed to normalizeRoundAndPackFloat128() as high first, low second. The current code passes the integer first, so the result is incorrectly shifted left by 64 bits. This bug affects the emulation of s390x instruction CXLGBR (convert from logical 64-bit binary-integer operand to extended BFP result). Cc: qemu-stable@nongnu.org Tested-by: Alex Bennée Reviewed-by: Alex Bennée Reviewed-by: Peter Maydell Signed-off-by: Petr Tesarik Message-Id: <20180511071052.1443-1-ptesarik@suse.com> Signed-off-by: Richard Henderson --- fpu/softfloat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fpu') diff --git a/fpu/softfloat.c b/fpu/softfloat.c index bc0f52f..d074193 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -3147,7 +3147,7 @@ float128 uint64_to_float128(uint64_t a, float_status *status) if (a == 0) { return float128_zero; } - return normalizeRoundAndPackFloat128(0, 0x406E, a, 0, status); + return normalizeRoundAndPackFloat128(0, 0x406E, 0, a, status); } -- cgit v1.1