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ppc: Fix xsmaddmdp and friends 

A class of instructions of the form:
  op Target,A,B
which operate like:
  Target = Target * A + B
have a bit set which distinguishes them from instructions that operate as:
  Target = Target * B + A

This bit is not being checked properly (using PPC_BIT macro), so all
instructions in this class are operating incorrectly as the second form
above.  The bit was being checked as if it were part of a 64-bit
instruction opcode, rather than a proper 32-bit opcode.  Fix by using the
macro (PPC_BIT32) which treats the opcode as a 32-bit quantity.

Fixes: c9f4e4d8b6 ("target/ppc: improve VSX_FMADD with new GEN_VSX_HELPER_VSX_MADD macro")

Signed-off-by: Paul A. Clarke <pc@us.ibm.com>
Message-Id: <1566401321-22419-1-git-send-email-pc@us.ibm.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Tested-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Paul A. Clarke 2019-08-21 10:28:41 -05:00 committed by David Gibson
parent 5185a5b6c7
commit 256be7d07a
1 changed files with 1 additions and 1 deletions
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2
target/ppc/translate/vsx-impl.inc.c
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@ -1308,7 +1308,7 @@ static void gen_##name(DisasContext *ctx) \
} \
xt = gen_vsr_ptr(xT(ctx->opcode)); \
xa = gen_vsr_ptr(xA(ctx->opcode)); \
if (ctx->opcode & PPC_BIT(25)) { \
if (ctx->opcode & PPC_BIT32(25)) { \
/* \
* AxT + B \
*/ \