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(Updated Aug. 1, 2016, 3:57 p.m.) Review request for Default. Changes ------- Format summary and description Summary (updated) ----------------- cpu, arm: Separate Float* from SimdFloat*, add FloatMem* opClass Repository: gem5 Description (updated) ------- Modify the opClass assigned to AArch64 FP instructions from SimdFloat* to Float*. Also create the FloatMemRead and FloatMemWrite opClasses, which distinguishes writes to the INT and FP register banks. Change the latency of (Simd)FloatMultAcc to 5, based on the Cortex-A72, where the "latency" of FMADD is 3 if the next instruction is a FMADD and has only the augend to destination dependency, otherwise it's 7 cycles. Diffs ----- configs/common/O3_ARM_v7a.py cdb94f2332a6 src/arch/arm/isa/insts/fp64.isa cdb94f2332a6 src/arch/isa_parser.py cdb94f2332a6 src/cpu/FuncUnit.py cdb94f2332a6 src/cpu/minor/MinorCPU.py cdb94f2332a6 src/cpu/o3/FuncUnitConfig.py cdb94f2332a6 src/cpu/op_class.hh cdb94f2332a6 Diff: http://reviews.gem5.org/r/3547/diff/ Testing ------- The changes from SimdFloat* to Float* were quickly tested, indeed the neon64.isa and fp64.isa files already separate the implementations, so it should not be buggy. Load and store instructions tested, followed by #uops and opClass from stats.txt: asm("ldr X2, [X30], #0"); // 1 MemRead asm("ldp X2, X3, [X30], #0"); // 1 MemRead asm("ldpsw X2, X3, [X30], #0"); // 1 MemRead asm("ldr W2, [X30], #0"); // 1 MemRead asm("ldp W2, W3, [X30], #0"); // 1 MemRead asm("ldp Q0, Q1, [SP], #0"); // 2 FloatMemRead asm("ldp D2, D3, [SP], #0"); // 1 FloatMemRead asm("ldp S2, S3, [X30], #0"); // 1 FloatMemRead asm("ldr Q4, [SP], #0"); // 1 FloatMemRead asm("ldr Q4, [SP, X28]"); // 1 FloatMemRead asm("ldr D5, [SP], #0"); // 1 FloatMemRead asm("ldr D5, [SP, X28]"); // 1 FloatMemRead asm("ldr S6, [SP], #0"); // 1 FloatMemRead asm("ldr S2, [X30, X28]"); // 1 FloatMemRead asm("ldr H7, [X30], #0"); // 1 FloatMemRead asm("ldr B8, [SP], #0"); // 1 FloatMemRead asm("ldur B0, [X30, #0]"); // 1 FloatMemRead asm("ldur H0, [X30, #0]"); // 1 FloatMemRead asm("ldur S0, [X30, #0]"); // 1 FloatMemRead asm("ldur D0, [X30, #0]"); // 1 FloatMemRead asm("ldur Q0, [X30, #0]"); // 1 FloatMemRead asm("ld1 {V9.B}[0], [X30]"); // 1 FloatMemRead asm("ld1 {V9.B}[15], [X30]"); // 1 FloatMemRead asm("ld1 {V9.H}[0], [X30]"); // 1 FloatMemRead asm("ld1 {V9.H}[7], [X30]"); // 1 FloatMemRead asm("ld1 {V9.S}[0], [X30]"); // 1 FloatMemRead asm("ld1 {V9.S}[3], [X30]"); // 1 FloatMemRead asm("ld1 {V9.D}[0], [X30]"); // 1 FloatMemRead asm("ld1 {V9.D}[1], [X30]"); // 1 FloatMemRead asm("ld2 {V9.B, V10.B}[0], [X30]"); // 1 FloatMemRead asm("ld2 {V9.B, V10.B}[15], [X30]"); // 1 FloatMemRead asm("ld2 {V9.H, V10.H}[0], [X30]"); // 1 FloatMemRead asm("ld2 {V9.H, V10.H}[7], [X30]"); // 1 FloatMemRead asm("ld2 {V9.S, V10.S}[0], [X30]"); // 1 FloatMemRead asm("ld2 {V9.S, V10.S}[3], [X30]"); // 1 FloatMemRead asm("ld2 {V9.D, V10.D}[0], [X30]"); // 1 FloatMemRead asm("ld2 {V9.D, V10.D}[1], [X30]"); // 1 FloatMemRead asm("ld3 {V9.B, V10.B, V11.B}[0], [X30]"); // 1 FloatMemRead asm("ld3 {V9.B, V10.B, V11.B}[15], [X30]"); // 1 FloatMemRead asm("ld3 {V9.H, V10.H, V11.H}[0], [X30]"); // 1 FloatMemRead asm("ld3 {V9.H, V10.H, V11.H}[7], [X30]"); // 1 FloatMemRead asm("ld3 {V9.S, V10.S, V11.S}[0], [X30]"); // 1 FloatMemRead asm("ld3 {V9.S, V10.S, V11.S}[3], [X30]"); // 1 FloatMemRead asm("ld3 {V9.D, V10.D, V11.D}[0], [X30]"); // 2 FloatMemRead asm("ld3 {V9.D, V10.D, V11.D}[1], [X30]"); // 2 FloatMemRead asm("ld4 {V9.B, V10.B, V11.B, V12.B}[0], [X30]"); // 1 FloatMemRead asm("ld4 {V9.B, V10.B, V11.B, V12.B}[15], [X30]"); // 1 FloatMemRead asm("ld4 {V9.H, V10.H, V11.H, V12.H}[0], [X30]"); // 1 FloatMemRead asm("ld4 {V9.H, V10.H, V11.H, V12.H}[7], [X30]"); // 1 FloatMemRead asm("ld4 {V9.S, V10.S, V11.S, V12.S}[0], [X30]"); // 1 FloatMemRead asm("ld4 {V9.S, V10.S, V11.S, V12.S}[3], [X30]"); // 1 FloatMemRead asm("ld4 {V9.D, V10.D, V11.D, V12.D}[0], [X30]"); // 2 FloatMemRead asm("ld4 {V9.D, V10.D, V11.D, V12.D}[1], [X30]"); // 2 FloatMemRead asm("ld1 {V9.16B}, [X30], #16"); // 1 FloatMemRead asm("ld1 {V9.8H, V10.8H}, [X30], #32"); // 2 FloatMemRead asm("ld1 {V9.4S, V10.4S, V11.4S}, [X30], #48"); // 3 FloatMemRead asm("ld1 {V9.2D, V10.2D, V11.2D, V12.2D}, [X30], #64"); // 4 FloatMemRead asm("ld2 {V9.8H, V10.8H}, [X30], #32"); // 2 FloatMemRead asm("ld3 {V9.4S, V10.4S, V11.4S}, [X30], #48"); // 3 FloatMemRead asm("ld4 {V9.2D, V10.2D, V11.2D, V12.2D}, [X30], #64"); // 4 FloatMemRead asm("ld1r {V9.16B}, [X30]"); // 1 FloatMemRead asm("ld1r {V9.8H}, [X30]"); // 1 FloatMemRead asm("ld1r {V9.4S}, [X30]"); // 1 FloatMemRead asm("ld1r {V9.2D}, [X30]"); // 1 FloatMemRead asm("ld2r {V9.16B, V10.16B}, [X30]"); // 1 FloatMemRead asm("ld2r {V9.8H, V10.8H}, [X30]"); // 1 FloatMemRead asm("ld2r {V9.4S, V10.4S}, [X30]"); // 1 FloatMemRead asm("ld2r {V9.2D, V10.2D}, [X30]"); // 1 FloatMemRead asm("ld3r {V9.16B, V10.16B, V11.16B}, [X30]"); // 1 FloatMemRead asm("ld3r {V9.8H, V10.8H, V11.8H}, [X30]"); // 1 FloatMemRead asm("ld3r {V9.4S, V10.4S, V11.4S}, [X30]"); // 1 FloatMemRead asm("ld3r {V9.2D, V10.2D, V11.2D}, [X30]"); // 2 FloatMemRead asm("ld4r {V9.16B, V10.16B, V11.16B, V12.16B}, [X30]"); // 1 FloatMemRead asm("ld4r {V9.8H, V10.8H, V11.8H, V12.8H}, [X30]"); // 1 FloatMemRead asm("ld4r {V9.4S, V10.4S, V11.4S, V12.4S}, [X30]"); // 1 FloatMemRead asm("ld4r {V9.2D, V10.2D, V11.2D, V12.2D}, [X30]"); // 2 FloatMemRead asm("str X2, [X30], #0"); // 1 MemWrite asm("stp X2, X3, [X30], #0"); // 2 MemWrite asm("str W2, [X30], #0"); // 1 MemWrite asm("stp W2, W3, [X30], #0"); // 1 MemWrite asm("stp Q0, Q1, [X29], #0"); // 4 FloatMemWrite asm("stp D2, D3, [X29], #0"); // 2 FloatMemWrite asm("stp S2, S3, [X29], #0"); // 1 FloatMemWrite asm("str Q4, [X29], #0"); // 2 FloatMemWrite asm("str D5, [X29], #0"); // 1 FloatMemWrite asm("str S6, [X29], #0"); // 1 FloatMemWrite asm("str H7, [X29], #0"); // 1 FloatMemWrite asm("str B8, [X29], #0"); // 1 FloatMemWrite asm("stur B0, [X29, #0]"); // 1 FloatMemWrite asm("stur H0, [X29, #0]"); // 1 FloatMemWrite asm("stur S0, [X29, #0]"); // 1 FloatMemWrite asm("stur D0, [X29, #0]"); // 1 FloatMemWrite asm("stur Q0, [X29, #0]"); // 2 FloatMemWrite asm("st1 {V9.B}[0], [X29]"); // 1 FloatMemWrite asm("st1 {V9.B}[15], [X29]"); // 1 FloatMemWrite asm("st1 {V9.H}[0], [X29]"); // 1 FloatMemWrite asm("st1 {V9.H}[7], [X29]"); // 1 FloatMemWrite asm("st1 {V9.S}[0], [X29]"); // 1 FloatMemWrite asm("st1 {V9.S}[3], [X29]"); // 1 FloatMemWrite asm("st1 {V9.D}[0], [X29]"); // 1 FloatMemWrite asm("st1 {V9.D}[1], [X29]"); // 1 FloatMemWrite asm("st2 {V9.B, V10.B}[0], [X29]"); // 1 FloatMemWrite asm("st2 {V9.B, V10.B}[15], [X29]"); // 1 FloatMemWrite asm("st2 {V9.H, V10.H}[0], [X29]"); // 1 FloatMemWrite asm("st2 {V9.H, V10.H}[7], [X29]"); // 1 FloatMemWrite asm("st2 {V9.S, V10.S}[0], [X29]"); // 1 FloatMemWrite asm("st2 {V9.S, V10.S}[3], [X29]"); // 1 FloatMemWrite asm("st2 {V9.D, V10.D}[0], [X29]"); // 1 FloatMemWrite asm("st2 {V9.D, V10.D}[1], [X29]"); // 1 FloatMemWrite asm("st3 {V9.B, V10.B, V11.B}[0], [X29]"); // 1 FloatMemWrite asm("st3 {V9.B, V10.B, V11.B}[15], [X29]"); // 1 FloatMemWrite asm("st3 {V9.H, V10.H, V11.H}[0], [X29]"); // 1 FloatMemWrite asm("st3 {V9.H, V10.H, V11.H}[7], [X29]"); // 1 FloatMemWrite asm("st3 {V9.S, V10.S, V11.S}[0], [X29]"); // 1 FloatMemWrite asm("st3 {V9.S, V10.S, V11.S}[3], [X29]"); // 1 FloatMemWrite asm("st3 {V9.D, V10.D, V11.D}[0], [X29]"); // 2 FloatMemWrite asm("st3 {V9.D, V10.D, V11.D}[1], [X29]"); // 2 FloatMemWrite asm("st4 {V9.B, V10.B, V11.B, V12.B}[0], [X29]"); // 1 FloatMemWrite asm("st4 {V9.B, V10.B, V11.B, V12.B}[15], [X29]"); // 1 FloatMemWrite asm("st4 {V9.H, V10.H, V11.H, V12.H}[0], [X29]"); // 1 FloatMemWrite asm("st4 {V9.H, V10.H, V11.H, V12.H}[7], [X29]"); // 1 FloatMemWrite asm("st4 {V9.S, V10.S, V11.S, V12.S}[0], [X29]"); // 1 FloatMemWrite asm("st4 {V9.S, V10.S, V11.S, V12.S}[3], [X29]"); // 1 FloatMemWrite asm("st4 {V9.D, V10.D, V11.D, V12.D}[0], [X29]"); // 2 FloatMemWrite asm("st4 {V9.D, V10.D, V11.D, V12.D}[1], [X29]"); // 2 FloatMemWrite asm("st1 {V9.16B}, [X29], #16"); // 1 FloatMemWrite asm("st1 {V9.8H, V10.8H}, [X29], #32"); // 2 FloatMemWrite asm("st1 {V9.4S, V10.4S, V11.4S}, [X29], #48"); // 3 FloatMemWrite asm("st1 {V9.2D, V10.2D, V11.2D, V12.2D}, [X29], #64"); // 4 FloatMemWrite asm("st2 {V9.8H, V10.8H}, [X29], #32"); // 2 FloatMemWrite asm("st3 {V9.4S, V10.4S, V11.4S}, [X29], #48"); // 3 FloatMemWrite asm("st4 {V9.2D, V10.2D, V11.2D, V12.2D}, [X29], #64"); // 4 FloatMemWrite Thanks, Fernando Endo _______________________________________________ gem5-dev mailing list gem5-dev@gem5.org http://m5sim.org/mailman/listinfo/gem5-dev
