Szabolcs Nagy
a732e80d33
Some early x86_64 cpus (released before 2006) did not support sahf/lahf instructions so they should be avoided (intel manual says they are only supported if CPUID.80000001H:ECX.LAHF-SAHF[bit 0] = 1). The workaround simplifies exp2l and expm1l because fucomip can be used instead of the fucomp;fnstsw;sahf sequence copied from i386. In fmodl and remainderl sahf is replaced by a simple bit test.
12 lines
132 B
ArmAsm
12 lines
132 B
ArmAsm
.global fmodl
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.type fmodl,@function
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fmodl:
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fldt 24(%esp)
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fldt 8(%esp)
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1: fprem
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fstsw %ax
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testb $4,%ah
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jnz 1b
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fstp %st(1)
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ret
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