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FPU detect illegal instructions

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This commit is contained in:
David Harris 2023-03-24 08:12:32 -07:00
parent 59f948d47c
commit 25a1ea7d23
1 changed files with 3 additions and 2 deletions
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5
src/fpu/fctrl.sv
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@ -123,7 +123,7 @@ module fctrl (
7'b00001??: ControlsD = `FCTRLW'b1_0_01_10_111_0_0_0; // fsub
7'b00010??: ControlsD = `FCTRLW'b1_0_01_10_100_0_0_0; // fmul
7'b00011??: ControlsD = `FCTRLW'b1_0_01_01_xx0_1_0_0; // fdiv
7'b01011??: ControlsD = `FCTRLW'b1_0_01_01_xx1_1_0_0; // fsqrt
7'b01011??: if (Rs2D == 5'b0000) ControlsD = `FCTRLW'b1_0_01_01_xx1_1_0_0; // fsqrt
7'b00100??: case(Funct3D)
3'b000: ControlsD = `FCTRLW'b1_0_00_xx_000_0_0_0; // fsgnj
3'b001: ControlsD = `FCTRLW'b1_0_00_xx_001_0_0_0; // fsgnjn
@ -141,7 +141,8 @@ module fctrl (
3'b000: ControlsD = `FCTRLW'b0_1_00_xx_011_0_0_0; // fle
default: ControlsD = `FCTRLW'b0_0_00_xx_000__0_1_0; // non-implemented instruction
endcase
7'b11100??: if (Funct3D == 3'b001) ControlsD = `FCTRLW'b0_1_10_xx_000_0_0_0; // fclass
7'b11100??: if (Funct3D == 3'b001 & Rs2D == 5'b00000)
ControlsD = `FCTRLW'b0_1_10_xx_000_0_0_0; // fclass
else if (Funct3D[1:0] == 2'b00) ControlsD = `FCTRLW'b0_1_11_xx_000_0_0_0; // fmv.x.w to int reg
else if (Funct3D[1:0] == 2'b01) ControlsD = `FCTRLW'b0_1_11_xx_000_0_0_0; // fmv.x.d to int reg
else ControlsD = `FCTRLW'b0_0_00_xx_000_0_1_0; // non-implemented instruction