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fmax optimization bundle (250 MHz).

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This commit is contained in:
Blaise Tine
2021-09-08 02:26:39 -07:00
parent 05bc970900
commit 3d052e9428
9 changed files with 71 additions and 65 deletions
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5
hw/rtl/fp_cores/VX_fp_cvt.v
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@@ -85,8 +85,7 @@ module VX_fp_cvt #(
assign int_mantissa = int_sign ? (-dataa[i]) : dataa[i];
assign fmt_mantissa = INT_MAN_WIDTH'({fp_clss[i].is_normal, dataa[i][MAN_BITS-1:0]});
assign fmt_exponent[i] = {1'b0, dataa[i][MAN_BITS +: EXP_BITS]} +
{1'b0, fp_clss[i].is_subnormal} +
(FMT_SHIFT_COMPENSATION - EXP_BIAS);
{1'b0, fp_clss[i].is_subnormal};
assign encoded_mant[i] = is_itof ? int_mantissa : fmt_mantissa;
assign input_sign[i] = is_itof ? int_sign : fmt_sign;
`IGNORE_WARNINGS_END
@@ -144,7 +143,7 @@ module VX_fp_cvt #(
assign input_mant_s0[i] = encoded_mant_s0[i] << renorm_shamt_s0[i];
// Unbias exponent and compensate for shift
wire [INT_EXP_WIDTH-1:0] fp_input_exp = fmt_exponent_s0[i] - {1'b0, renorm_shamt_s0[i]};
wire [INT_EXP_WIDTH-1:0] fp_input_exp = fmt_exponent_s0[i] + (FMT_SHIFT_COMPENSATION - EXP_BIAS) - {1'b0, renorm_shamt_s0[i]};
wire [INT_EXP_WIDTH-1:0] int_input_exp = (INT_MAN_WIDTH-1) - {1'b0, renorm_shamt_s0[i]};
assign input_exp_s0[i] = is_itof_s0 ? int_input_exp : fp_input_exp;

2
hw/rtl/fp_cores/VX_fp_ncomp.v
View File

@@ -100,7 +100,7 @@ module VX_fp_ncomp #(
VX_pipe_register #(
.DATAW (1 + TAGW + `INST_FPU_BITS + `INST_FRM_BITS + LANES * (2 * 32 + 1 + 1 + 8 + 23 + 2 * $bits(fp_class_t) + 1 + 1)),
.RESETW (1),
.DEPTH (0)
.DEPTH (1)
) pipe_reg0 (
.clk (clk),
.reset (reset),