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drz80: don't use swp

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swp is not available and sometimes emulated on newer ARMs
on older ARMs it does some bus locking that we don't need
This commit is contained in:
notaz 2013-09-08 19:03:53 +03:00
parent ecc8036ee2
commit 15b5b52505
1 changed files with 15 additions and 10 deletions
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25
cpu/DrZ80/drz80.s
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@ -4294,10 +4294,12 @@ opcode_0_7:
fetch 4
;@EX AF,AF'
opcode_0_8:
add r1,cpucontext,#z80a2
swp z80a,z80a,[r1]
add r1,cpucontext,#z80f2
swp z80f,z80f,[r1]
ldr r0,[cpucontext,#z80a2]
ldr r1,[cpucontext,#z80f2]
str z80a,[cpucontext,#z80a2]
str z80f,[cpucontext,#z80f2]
mov z80a,r0
mov z80f,r1
fetch 4
;@ADD HL,BC
opcode_0_9:
@ -5336,12 +5338,15 @@ opcode_D_8:
fetch 5
;@EXX
opcode_D_9:
add r1,cpucontext,#z80bc2
swp z80bc,z80bc,[r1]
add r1,cpucontext,#z80de2
swp z80de,z80de,[r1]
add r1,cpucontext,#z80hl2
swp z80hl,z80hl,[r1]
ldr r0,[cpucontext,#z80bc2]
ldr r1,[cpucontext,#z80de2]
ldr r2,[cpucontext,#z80hl2]
str z80bc,[cpucontext,#z80bc2]
str z80de,[cpucontext,#z80de2]
str z80hl,[cpucontext,#z80hl2]
mov z80bc,r0
mov z80de,r1
mov z80hl,r2
fetch 4
;@JP C,$+3
opcode_D_A: