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590e85b575
These routines do not require executable stacks. However, by default ELFish linkers may assume an executable stack on GNUish environments (and some non-GNU ones too!). The GNU extension to add a note to indicate a non-executable stack is honoured by these environments to mark the stack as non-executable (the compiler normally emits this directive on appropriate targets whenever possible). This allows normal builds from getting executable stacks due to linking to the compiler rt builtins. llvm-svn: 273500
47 lines
963 B
ArmAsm
47 lines
963 B
ArmAsm
// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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#include "../assembly.h"
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// long double __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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