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target/microblaze: Convert dec_sub to decodetree

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Use tcg_gen_add2_i32 for computing carry.
This removes the last use of helper_carry, so remove that.

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-08-17 11:29:24 -07:00
parent 2080017965
commit a2b0b90e79
4 changed files with 65 additions and 75 deletions
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16
target/microblaze/op_helper.c
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@ -69,17 +69,6 @@ void helper_raise_exception(CPUMBState *env, uint32_t index)
cpu_loop_exit(cs);
}
static inline uint32_t compute_carry(uint32_t a, uint32_t b, uint32_t cin)
{
uint32_t cout = 0;
if ((b == ~0) && cin)
cout = 1;
else if ((~0 - a) < (b + cin))
cout = 1;
return cout;
}
uint32_t helper_cmp(uint32_t a, uint32_t b)
{
uint32_t t;
@ -100,11 +89,6 @@ uint32_t helper_cmpu(uint32_t a, uint32_t b)
return t;
}
uint32_t helper_carry(uint32_t a, uint32_t b, uint32_t cf)
{
return compute_carry(a, b, cf);
}
static inline int div_prepare(CPUMBState *env, uint32_t a, uint32_t b)
{
MicroBlazeCPU *cpu = env_archcpu(env);