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fixed FPU handshake, optimized writeback's critical path

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This commit is contained in:
Blaise Tine
2020-08-07 10:11:54 -07:00
parent ffd9515881
commit cd29362d10
26 changed files with 212 additions and 2368 deletions
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19
hw/rtl/VX_define.vh
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@@ -38,7 +38,7 @@
///////////////////////////////////////////////////////////////////////////////
`define LATENCY_IDIV 22
`define LATENCY_IDIV 23
`define LATENCY_IMUL 2
`define LATENCY_FDIV 16
@@ -201,13 +201,6 @@
`define FRM_DYN 3'b111 // dynamic mode
`define FRM_BITS 3
`define FFG_NX 0 // inexact
`define FFG_UF 1 // underflow
`define FFG_OF 2 // overflow
`define FFG_DZ 3 // division by zero
`define FFG_NV 4 // invalid
`define FFG_BITS 5
`define GPU_TMC 3'h0
`define GPU_WSPAWN 3'h1
`define GPU_SPLIT 3'h2
@@ -440,4 +433,14 @@ typedef struct packed {
logic is_quiet;
} fp_type_t;
typedef struct packed {
logic NV; // Invalid
logic DZ; // Divide by zero
logic OF; // Overflow
logic UF; // Underflow
logic NX; // Inexact
} fflags_t;
`define FFG_BITS $bits(fflags_t)
`endif