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-- Min/Max Select (FMIN/FMAX) -------------------------------------------------------------
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-- Min/Max Select (FMIN/FMAX) -------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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min_max_select: process(fpu_operands, comp_less_ff, fu_compare, ctrl_i)
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min_max_select: process(fpu_operands, comp_less_ff, fu_compare, ctrl_i)
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variable cond_v : std_ulogic_vector(2 downto 0);
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variable cond_v : std_ulogic_vector(2 downto 0);
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begin
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begin
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-- comparison restul - check for special cases: -0 is less than +0
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-- comparison result - check for special cases: -0 is less than +0
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if ((fpu_operands.rs1_class(fp_class_neg_zero_c) = '1') and (fpu_operands.rs2_class(fp_class_pos_zero_c) = '1')) then
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if ((fpu_operands.rs1_class(fp_class_neg_zero_c) = '1') and (fpu_operands.rs2_class(fp_class_pos_zero_c) = '1')) then
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cond_v(0) := ctrl_i(ctrl_ir_funct3_0_c);
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cond_v(0) := ctrl_i(ctrl_ir_funct3_0_c);
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elsif ((fpu_operands.rs1_class(fp_class_pos_zero_c) = '1') and (fpu_operands.rs2_class(fp_class_neg_zero_c) = '1')) then
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elsif ((fpu_operands.rs1_class(fp_class_pos_zero_c) = '1') and (fpu_operands.rs2_class(fp_class_neg_zero_c) = '1')) then
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cond_v(0) := not ctrl_i(ctrl_ir_funct3_0_c);
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cond_v(0) := not ctrl_i(ctrl_ir_funct3_0_c);
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else -- "normal= comparison
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else -- "normal= comparison
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cond_v(0) := comp_less_ff xnor ctrl_i(ctrl_ir_funct3_0_c); -- min/max select
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cond_v(0) := comp_less_ff xnor ctrl_i(ctrl_ir_funct3_0_c); -- min/max select
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end if;
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end if;
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-- nmumber NaN check --
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-- number NaN check --
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cond_v(2) := fpu_operands.rs1_class(fp_class_snan_c) or fpu_operands.rs1_class(fp_class_qnan_c);
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cond_v(2) := fpu_operands.rs1_class(fp_class_snan_c) or fpu_operands.rs1_class(fp_class_qnan_c);
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cond_v(1) := fpu_operands.rs2_class(fp_class_snan_c) or fpu_operands.rs2_class(fp_class_qnan_c);
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cond_v(1) := fpu_operands.rs2_class(fp_class_snan_c) or fpu_operands.rs2_class(fp_class_qnan_c);
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-- data output --
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-- data output --
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case cond_v is
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case cond_v is
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