D - inline asm again
- Sean L. Palmer (6/6) Apr 06 2003 Another small problem: the inline assembler doesn't support the "xmmwor...
- Serge K (1/4) Apr 07 2003 How about "oword" (octa-word), as it was in the VAX assembly?
- Walter (3/8) Apr 07 2003 movdqa xmm0, [eax]
- Sean L. Palmer (10/20) Apr 08 2003 Already found that. I think it's great that you don't have to use dword...
- Walter (9/15) Apr 08 2003 ptr
- Sean L. Palmer (5/15) Apr 08 2003 Ah yes. Well there are no immediate operands for XMM registers. So the
- Walter (7/26) Apr 09 2003 The syntax is a poor choice, a better one would have been:
- Sean L. Palmer (18/29) Apr 09 2003 I agree. The Motorola way looks nicer.
- chris jones (11/33) Apr 11 2003 you need it for..
Another small problem: the inline assembler doesn't support the "xmmword ptr [x]" construct. movdqa xmm0, xmmword ptr [eax] I tried dqword ptr also; no dice. Is there an alternative or does this just need added? Sean
Apr 06 2003
"Serge K" <skarebo programmer.net> movdqa xmm0, xmmword ptr [eax] I tried dqword ptr also; no dice. Is there an alternative or does this just need added?How about "oword" (octa-word), as it was in the VAX assembly?
Apr 07 2003
"Sean L. Palmer" <palmer.sean verizon.net> wrote in message news:b6qldj$km5$1 digitaldaemon.com...Another small problem: the inline assembler doesn't support the "xmmword ptr [x]" construct. movdqa xmm0, xmmword ptr [eax] I tried dqword ptr also; no dice. Is there an alternative or does this just need added?movdqa xmm0, [eax]
Apr 07 2003
Already found that. I think it's great that you don't have to use dword ptr etc; it's inferred from the register's size. It's just not standard Intel asm syntax. dword ptr works, xmmword ptr doesn't. I can't think of a reason why you'd ever need the 'byte ptr' syntax anyway. It's entirely redundant, no? I guess if you have a macro that moves memory to memory or something you might need it. Sean "Walter" <walter digitalmars.com> wrote in message news:b6tto4$1bmh$1 digitaldaemon.com..."Sean L. Palmer" <palmer.sean verizon.net> wrote in message news:b6qldj$km5$1 digitaldaemon.com..."xmmwordAnother small problem: the inline assembler doesn't support theptr [x]" construct. movdqa xmm0, xmmword ptr [eax] I tried dqword ptr also; no dice. Is there an alternative or does this just need added?movdqa xmm0, [eax]
Apr 08 2003
"Sean L. Palmer" <palmer.sean verizon.net> wrote in message news:b6usdl$22g2$1 digitaldaemon.com...Already found that. I think it's great that you don't have to use dwordptretc; it's inferred from the register's size. It's just not standardIntelasm syntax. dword ptr works, xmmword ptr doesn't. I can't think of a reason why you'd ever need the 'byte ptr' syntaxanyway.It's entirely redundant, no? I guess if you have a macro that movesmemoryto memory or something you might need it.It's needed to distinguish: cmp [EAX],0 is it a byte, word or dword operation?
Apr 08 2003
Ah yes. Well there are no immediate operands for XMM registers. So the only issue really is consistency. Sean "Walter" <walter digitalmars.com> wrote in message news:b6v844$2b4q$1 digitaldaemon.com..."Sean L. Palmer" <palmer.sean verizon.net> wrote in message news:b6usdl$22g2$1 digitaldaemon.com...I can't think of a reason why you'd ever need the 'byte ptr' syntaxanyway.It's entirely redundant, no? I guess if you have a macro that movesmemoryto memory or something you might need it.It's needed to distinguish: cmp [EAX],0 is it a byte, word or dword operation?
Apr 08 2003
The syntax is a poor choice, a better one would have been:
cmpb [EAX],0
cmpw [EAX],0
cmpd [EAX],0
but oh well, the xxx ptr thing is how Intel did it.
"Sean L. Palmer" <palmer.sean verizon.net> wrote in message
news:b708vd$5n$1 digitaldaemon.com...
Ah yes. Well there are no immediate operands for XMM registers. So the
only issue really is consistency.
Sean
"Walter" <walter digitalmars.com> wrote in message
news:b6v844$2b4q$1 digitaldaemon.com...
"Sean L. Palmer" <palmer.sean verizon.net> wrote in message
news:b6usdl$22g2$1 digitaldaemon.com...
I can't think of a reason why you'd ever need the 'byte ptr' syntax
anyway.
It's entirely redundant, no? I guess if you have a macro that moves
memory
to memory or something you might need it.
It's needed to distinguish:
cmp [EAX],0
is it a byte, word or dword operation?
Apr 09 2003
I agree. The Motorola way looks nicer.
Out of curiosity, do you have any plans to support SIMD registers as
intrinsic types, with intrinsic functions representing the XMM opcodes? See
<xmmintrin.h> in the VC6 Processor Pack for an example of how MS/Intel did
it.
I just heard the new SN compiler for PS2 has intrinsics for its SIMD
capabilities. It seems the right way to handle this stuff. Then the
compiler can do what it does best... register allocation and pipelining.
The first step is done; inline asm support for the registers and
instruction types.
The intrinsics are just the second step. They allow us programmers to
access the low level machine types without resorting to asm any more than we
have to.
The next step is having the compiler emit SIMD automatically thru unrolling
loops or thru array operations.
Sean
"Walter" <walter digitalmars.com> wrote in message
news:b70k2m$8e1$1 digitaldaemon.com...
The syntax is a poor choice, a better one would have been:
cmpb [EAX],0
cmpw [EAX],0
cmpd [EAX],0
but oh well, the xxx ptr thing is how Intel did it.
"Sean L. Palmer" <palmer.sean verizon.net> wrote in message
news:b708vd$5n$1 digitaldaemon.com...
Ah yes. Well there are no immediate operands for XMM registers. So the
only issue really is consistency.
Sean
Apr 09 2003
you need it for.. movzx eax, [???] is that a zero extended word or a zero extended byte? chris "Sean L. Palmer" <palmer.sean verizon.net> wrote in message news:b6usdl$22g2$1 digitaldaemon.com...Already found that. I think it's great that you don't have to use dwordptretc; it's inferred from the register's size. It's just not standardIntelasm syntax. dword ptr works, xmmword ptr doesn't. I can't think of a reason why you'd ever need the 'byte ptr' syntaxanyway.It's entirely redundant, no? I guess if you have a macro that movesmemoryto memory or something you might need it. Sean "Walter" <walter digitalmars.com> wrote in message news:b6tto4$1bmh$1 digitaldaemon.com...this"Sean L. Palmer" <palmer.sean verizon.net> wrote in message news:b6qldj$km5$1 digitaldaemon.com..."xmmwordAnother small problem: the inline assembler doesn't support theptr [x]" construct. movdqa xmm0, xmmword ptr [eax] I tried dqword ptr also; no dice. Is there an alternative or doesjust need added?movdqa xmm0, [eax]
Apr 11 2003