pnx/m16vm
1
0
Fork 0
mirror of https://github.com/pnx/m16vm synced 2026-06-16 03:44:55 +02:00
Code Releases Activity

adding asm/mov_test.as

Browse source
This commit is contained in:
Henrik Hautakoski 2018-12-14 14:04:52 +01:00
parent 2c734dc300
commit 2c1c832493
No known key found for this signature in database
GPG key ID: 839F3A7EAFAEAFAA
1 changed files with 15 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

15
asm/mov_test.as Normal file
View file

@ -0,0 +1,15 @@
; mov h/l test.
; Using 2 instructions to store a 16-bit words is abit tricky to write code for
; Storing 32767 = (2^15) - 1 (highest value in 2's complement 16-bit).
; MSB (signed flag) = 0, rest 1.
; H [0111 1111] L [1111 1111]
movl $0x0, -1
movh $0x0, 127
; Storing -32768 = (2^15) (highest value in 2's complement 16-bit).
; MSB (signed flag) = 1, rest 0.
; H [1000 0000] L [0000 0000]
movl $0x1, 0
movh $0x1, -128