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ppc: compute mask from BI using right shift 

This will match the code we use in fpu_helper.c when we flip
CRF_* bit-endianness.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Tested-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Paolo Bonzini 2014-08-28 19:15:09 +02:00 committed by Alexander Graf
parent e57d02022c
commit 8f9fb7ac49
1 changed files with 3 additions and 3 deletions
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6
target-ppc/translate.c
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@ -784,7 +784,7 @@ static void gen_isel(DisasContext *ctx)
l1 = gen_new_label();
l2 = gen_new_label();
mask = 1 << (3 - (bi & 0x03));
mask = 0x08 >> (bi & 0x03);
t0 = tcg_temp_new_i32();
tcg_gen_andi_i32(t0, cpu_crf[bi >> 2], mask);
tcg_gen_brcondi_i32(TCG_COND_EQ, t0, 0, l1);
@ -3889,7 +3889,7 @@ static inline void gen_bcond(DisasContext *ctx, int type)
if ((bo & 0x10) == 0) {
/* Test CR */
uint32_t bi = BI(ctx->opcode);
uint32_t mask = 1 << (3 - (bi & 0x03));
uint32_t mask = 0x08 >> (bi & 0x03);
TCGv_i32 temp = tcg_temp_new_i32();
if (bo & 0x8) {
@ -3971,7 +3971,7 @@ static void glue(gen_, name)(DisasContext *ctx)
else \
tcg_gen_mov_i32(t1, cpu_crf[crbB(ctx->opcode) >> 2]); \
tcg_op(t0, t0, t1); \
bitmask = 1 << (3 - (crbD(ctx->opcode) & 0x03)); \
bitmask = 0x08 >> (crbD(ctx->opcode) & 0x03); \
tcg_gen_andi_i32(t0, t0, bitmask); \
tcg_gen_andi_i32(t1, cpu_crf[crbD(ctx->opcode) >> 2], ~bitmask); \
tcg_gen_or_i32(cpu_crf[crbD(ctx->opcode) >> 2], t0, t1); \