forked from KolibriOS/kolibrios
34 lines
755 B
ArmAsm
34 lines
755 B
ArmAsm
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/*
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* Written by J.T. Conklin <jtc@netbsd.org>.
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* Public domain.
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*
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* Changes for long double by Ulrich Drepper <drepper@cygnus.com>
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*
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*/
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.file "floor.s"
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.text
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.align 4
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.globl _floor
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.def _floor; .scl 2; .type 32; .endef
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_floor:
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fldl 4(%esp)
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subl $8,%esp
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fstcw 4(%esp) /* store fpu control word */
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/* We use here %edx although only the low 1 bits are defined.
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But none of the operations should care and they are faster
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than the 16 bit operations. */
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movl $0x400,%edx /* round towards -oo */
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orl 4(%esp),%edx
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andl $0xf7ff,%edx
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movl %edx,(%esp)
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fldcw (%esp) /* load modified control word */
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frndint /* round */
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fldcw 4(%esp) /* restore original control word */
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addl $8,%esp
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ret
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