diff options
Diffstat (limited to 'libc/i386fp/fpulld.x')
| -rw-r--r-- | libc/i386fp/fpulld.x | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/libc/i386fp/fpulld.x b/libc/i386fp/fpulld.x new file mode 100644 index 0000000..928a846 --- /dev/null +++ b/libc/i386fp/fpulld.x @@ -0,0 +1,20 @@ +! bcc 386 floating point routines (version 2) -- Fpulld +! authors: Timothy Murphy (tim@maths.tcd.ie), Bruce Evans + +#include "fplib.h" + +! Pop double from stack and store at address [ebx] + + .globl Fpulld + .align ALIGNMENT +Fpulld: + pop ecx + pop dword D_LOW[ebx] + pop dword D_HIGH[ebx] + jmp ecx ! return + +! This popping method is much slower on 486's because popping to memory +! takes 5+ while moving twice takes 2 and the return address doesn't +! have to be moved. However, popping is a little faster on a non-cached +! 386/20 with static column RAM although the memory access pattern is +! better for a double-width move than for popping. What about a cached 386? |