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target/microblaze: Implement cmp and cmpu inline 

These are simple enough operations; we do not need to
call an out-of-line helper.

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 2020-08-25 07:31:29 -07:00
parent a2b0b90e79
commit 58b48b637d
3 changed files with 22 additions and 24 deletions
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2
target/microblaze/helper.h
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@ -1,6 +1,4 @@
DEF_HELPER_FLAGS_2(raise_exception, TCG_CALL_NO_WG, noreturn, env, i32)
DEF_HELPER_2(cmp, i32, i32, i32)
DEF_HELPER_2(cmpu, i32, i32, i32)
DEF_HELPER_3(divs, i32, env, i32, i32)
DEF_HELPER_3(divu, i32, env, i32, i32)

20
target/microblaze/op_helper.c
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@ -69,26 +69,6 @@ void helper_raise_exception(CPUMBState *env, uint32_t index)
cpu_loop_exit(cs);
}
uint32_t helper_cmp(uint32_t a, uint32_t b)
{
uint32_t t;
t = b + ~a + 1;
if ((b & 0x80000000) ^ (a & 0x80000000))
t = (t & 0x7fffffff) | (b & 0x80000000);
return t;
}
uint32_t helper_cmpu(uint32_t a, uint32_t b)
{
uint32_t t;
t = b + ~a + 1;
if ((b & 0x80000000) ^ (a & 0x80000000))
t = (t & 0x7fffffff) | (a & 0x80000000);
return t;
}
static inline int div_prepare(CPUMBState *env, uint32_t a, uint32_t b)
{
MicroBlazeCPU *cpu = env_archcpu(env);

24
target/microblaze/translate.c
View File

@ -327,8 +327,28 @@ DO_TYPEBV(addic, true, gen_addc)
DO_TYPEBI(addik, false, tcg_gen_addi_i32)
DO_TYPEBV(addikc, true, gen_addkc)
DO_TYPEA(cmp, false, gen_helper_cmp)
DO_TYPEA(cmpu, false, gen_helper_cmpu)
static void gen_cmp(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
TCGv_i32 lt = tcg_temp_new_i32();
tcg_gen_setcond_i32(TCG_COND_LT, lt, inb, ina);
tcg_gen_sub_i32(out, inb, ina);
tcg_gen_deposit_i32(out, out, lt, 31, 1);
tcg_temp_free_i32(lt);
}
static void gen_cmpu(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)
{
TCGv_i32 lt = tcg_temp_new_i32();
tcg_gen_setcond_i32(TCG_COND_LTU, lt, inb, ina);
tcg_gen_sub_i32(out, inb, ina);
tcg_gen_deposit_i32(out, out, lt, 31, 1);
tcg_temp_free_i32(lt);
}
DO_TYPEA(cmp, false, gen_cmp)
DO_TYPEA(cmpu, false, gen_cmpu)
/* No input carry, but output carry. */
static void gen_rsub(TCGv_i32 out, TCGv_i32 ina, TCGv_i32 inb)