dmax.asm
来自「关于linux环境下的nasm代码的生成和使用」· 汇编 代码 · 共 43 行
ASM
43 行
;; file: dmax.asmglobal dmaxsegment .text; function dmax; returns the larger of its two double arguments; C prototype; double dmax( double d1, double d2 ); Parameters:; d1 - first double; d2 - second double; Return value:; larger of d1 and d2 (in ST0); next, some helpful symbols are defined%define d1 [ebp+8]%define d2 [ebp+16]dmax: enter 0, 0 fld qword d2 fld qword d1 ; ST0 = d1, ST1 = d2 fcomip st1 ; ST0 = d2 jna short d2_bigger fcomp st0 ; pop d2 from stack fld qword d1 ; ST0 = d1d2_bigger: ; if d2 is bigger, nothing to doexit: leave ret
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