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ARM: add some compatibility macros

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This adds some macros simplifying Thumb and pre-v6T2 compatibility.

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2012-03-20 17:04:54 +00:00
parent 949d942eef
commit dac78fd1d7
1 changed files with 19 additions and 0 deletions
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19
libavcodec/arm/asm.S
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@ -88,6 +88,13 @@ ELF .size \name, . - \name
\name:
.endm
#if !HAVE_ARMV6T2
.macro movw rd, val
mov \rd, \val & 255
orr \rd, \val & ~255
.endm
#endif
.macro mov32 rd, val
#if HAVE_ARMV6T2
movw \rd, #(\val) & 0xffff
@ -120,6 +127,12 @@ T sub \rn, \rn, \rm
T ldr \rt, [\rn]
.endm
.macro ldr_nreg rt, rn, rm:vararg
A ldr \rt, [\rn, -\rm]
T sub \rt, \rn, \rm
T ldr \rt, [\rt]
.endm
.macro ldr_post rt, rn, rm:vararg
A ldr \rt, [\rn], \rm
T ldr \rt, [\rn]
@ -156,6 +169,12 @@ T ldrh \rt, [\rn]
T add \rn, \rn, \rm
.endm
.macro ldrb_post rt, rn, rm
A ldrb \rt, [\rn], \rm
T ldrb \rt, [\rn]
T add \rn, \rn, \rm
.endm
.macro str_post rt, rn, rm:vararg
A str \rt, [\rn], \rm
T str \rt, [\rn]