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target-arm: Fix VCLE.F32 #0, VCLT.F32 #0 NaN handling

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Implementing the floating-point versions of VCLE #0 and VCLT #0 by
doing a GT comparison and inverting the result gives the wrong
result if the input is a NaN. Implement as a GT comparison with the
operands swapped instead.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Peter Maydell 2011-03-11 08:12:23 +00:00 committed by Aurelien Jarno
parent c7498daea7
commit 0e3261098f
1 changed files with 12 additions and 6 deletions
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18
target-arm/translate.c
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@ -5677,25 +5677,31 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
gen_neon_rsb(size, tmp, tmp2);
tcg_temp_free(tmp2);
break;
case 24: case 27: /* Float VCGT #0, Float VCLE #0 */
case 24: /* Float VCGT #0 */
tmp2 = tcg_const_i32(0);
gen_helper_neon_cgt_f32(tmp, tmp, tmp2);
tcg_temp_free(tmp2);
if (op == 27)
tcg_gen_not_i32(tmp, tmp);
break;
case 25: case 28: /* Float VCGE #0, Float VCLT #0 */
case 25: /* Float VCGE #0 */
tmp2 = tcg_const_i32(0);
gen_helper_neon_cge_f32(tmp, tmp, tmp2);
tcg_temp_free(tmp2);
if (op == 28)
tcg_gen_not_i32(tmp, tmp);
break;
case 26: /* Float VCEQ #0 */
tmp2 = tcg_const_i32(0);
gen_helper_neon_ceq_f32(tmp, tmp, tmp2);
tcg_temp_free(tmp2);
break;
case 27: /* Float VCLE #0 */
tmp2 = tcg_const_i32(0);
gen_helper_neon_cge_f32(tmp, tmp2, tmp);
tcg_temp_free(tmp2);
break;
case 28: /* Float VCLT #0 */
tmp2 = tcg_const_i32(0);
gen_helper_neon_cgt_f32(tmp, tmp2, tmp);
tcg_temp_free(tmp2);
break;
case 30: /* Float VABS */
gen_vfp_abs(0);
break;