05a4212cc7
Use of long double can be error-prone since it could be one of 80-bit extended precision float, IEEE 128-bit float, or IBM 128-bit float. Instead use an explicit xf_float typedef for the remaining cases where long double is being used in the implementation. This patch does not touch the PPC specializations which still use long double.
48 lines
1.0 KiB
ArmAsm
48 lines
1.0 KiB
ArmAsm
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "../assembly.h"
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// xf_float __floatundixf(du_int a);16
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#ifdef __i386__
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CONST_SECTION
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.balign 16
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twop52:
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.quad 0x4330000000000000
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.balign 16
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twop84_plus_twop52_neg:
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.quad 0xc530000000100000
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.balign 16
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twop84:
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.quad 0x4530000000000000
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#define REL_ADDR(_a) (_a)-0b(%eax)
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.text
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.balign 4
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DEFINE_COMPILERRT_FUNCTION(__floatundixf)
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calll 0f
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0: popl %eax
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movss 8(%esp), %xmm0 // hi 32 bits of input
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movss 4(%esp), %xmm1 // lo 32 bits of input
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orpd REL_ADDR(twop84), %xmm0 // 2^84 + hi (as a double)
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orpd REL_ADDR(twop52), %xmm1 // 2^52 + lo (as a double)
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addsd REL_ADDR(twop84_plus_twop52_neg), %xmm0 // hi - 2^52 (no rounding occurs)
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movsd %xmm1, 4(%esp)
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fldl 4(%esp)
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movsd %xmm0, 4(%esp)
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faddl 4(%esp)
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ret
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END_COMPILERRT_FUNCTION(__floatundixf)
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#endif // __i386__
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NO_EXEC_STACK_DIRECTIVE
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