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UNRATIFIED RISC-V: Add 'Zjpm' extension and its TENTATIVE CSRs
[DO NOT MERGE] Until 'Zjpm' extension is frozen/ratified and final version number is determined, this patch should not be merged upstream. This commit uses unratified version 0.3 as in the documentation (instead of possible 1.0 after ratification). This commit adds pointer masking proposal (Zjpm) and its CSRs based on the document version 0.3. <riscv/riscv-j-extension@2ba018a> ***Note*** Because CSR addresses are not fixed yet, this commit uses tentative addresses (a part of custom CSR space). bfd/ChangeLog: * elfxx-riscv.c (riscv_implicit_subsets) Add implication 'Zjpm' -> 'Zicsr'. (riscv_supported_std_z_ext): Add 'Zjpm' extension to valid 'Z' extension list. gas/ChangeLog: * config/tc-riscv.c (enum riscv_csr_class): Add CSR classes for the 'Zjpm' extension. (riscv_csr_address): Add handling for new CSR classes. * testsuite/gas/riscv/csr-dw-regnums.d: Add new CSRs. * testsuite/gas/riscv/csr-dw-regnums.s: Likewise. * testsuite/gas/riscv/csr.s: Add new CSRs. * testsuite/gas/riscv/csr-version-1p9p1.d: Likewise. * testsuite/gas/riscv/csr-version-1p9p1.l: Likewise. * testsuite/gas/riscv/csr-version-1p10.d: Likewise. * testsuite/gas/riscv/csr-version-1p10.l: Likewise. * testsuite/gas/riscv/csr-version-1p11.d: Likewise. * testsuite/gas/riscv/csr-version-1p11.l: Likewise. * testsuite/gas/riscv/csr-version-1p12.d: Likewise. * testsuite/gas/riscv/csr-version-1p12.l: Likewise. include/ChangeLog: * opcode/riscv-opc.h (CSR_MPM, CSR_HSPM, CSR_SPM, CSR_UPM): New CSR macros.
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‎bfd/elfxx-riscv.c‎

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@@ -1101,6 +1101,7 @@ static struct riscv_implicit_subset riscv_implicit_subsets[] =
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{"zks", "zbkx", check_implicit_always},
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{"zks", "zksed", check_implicit_always},
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{"zks", "zksh", check_implicit_always},
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{"zjpm", "zicsr", check_implicit_always}, /* TODO: ask J-ext TG for Zicsr dependency. */
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{"smaia", "ssaia", check_implicit_always},
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{"smstateen", "ssstateen", check_implicit_always},
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{"smepmp", "zicsr", check_implicit_always},
@@ -1199,6 +1200,7 @@ static struct riscv_supported_ext riscv_supported_std_z_ext[] =
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{"zksed", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
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{"zksh", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
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{"zkt", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
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{"zjpm", ISA_SPEC_CLASS_DRAFT, 0, 3, 0 },
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{"zve32x", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
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{"zve32f", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
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{"zve32d", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },

‎gas/config/tc-riscv.c‎

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@@ -68,6 +68,8 @@ enum riscv_csr_class
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CSR_CLASS_I_32, /* rv32 only */
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CSR_CLASS_F, /* f-ext only */
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CSR_CLASS_ZKR, /* zkr only */
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CSR_CLASS_ZJPM, /* zjpm only */
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CSR_CLASS_ZJPM_AND_H, /* zjpm only (with H) */
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CSR_CLASS_V, /* rvv only */
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CSR_CLASS_DEBUG, /* debug CSR */
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CSR_CLASS_H, /* hypervisor */
@@ -1040,6 +1042,12 @@ riscv_csr_address (const char *csr_name,
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case CSR_CLASS_ZKR:
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extension = "zkr";
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break;
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case CSR_CLASS_ZJPM_AND_H:
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is_h_required = true;
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/* Fall through. */
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case CSR_CLASS_ZJPM:
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extension = "zjpm";
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break;
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case CSR_CLASS_V:
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extension = "zve32x";
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break;

‎gas/testsuite/gas/riscv/csr-dw-regnums.d‎

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@@ -456,4 +456,8 @@ Contents of the .* section:
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DW_CFA_offset_extended_sf: r7200 \(vl\) at cfa\+12416
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DW_CFA_offset_extended_sf: r7201 \(vtype\) at cfa\+12420
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DW_CFA_offset_extended_sf: r7202 \(vlenb\) at cfa\+12424
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DW_CFA_offset_extended_sf: r7104 \(mpm\) at cfa\+12032
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DW_CFA_offset_extended_sf: r6592 \(spm\) at cfa\+9984
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DW_CFA_offset_extended_sf: r6336 \(upm\) at cfa\+8960
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DW_CFA_offset_extended_sf: r6848 \(hspm\) at cfa\+11008
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#...

‎gas/testsuite/gas/riscv/csr-dw-regnums.s‎

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@@ -459,5 +459,10 @@ _start:
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.cfi_offset vl, 12416
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.cfi_offset vtype, 12420
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.cfi_offset vlenb, 12424
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# Zjpm extension (both privileged and unprivileged)
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.cfi_offset mpm, 12032
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.cfi_offset spm, 9984
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.cfi_offset upm, 8960
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.cfi_offset hspm, 11008
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nop
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.cfi_endproc

‎gas/testsuite/gas/riscv/csr-version-1p10.d‎

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@@ -887,3 +887,11 @@ Disassembly of section .text:
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[ ]+[0-9a-f]+:[ ]+c2159073[ ]+csrw[ ]+vtype,a1
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[ ]+[0-9a-f]+:[ ]+c2202573[ ]+csrr[ ]+a0,vlenb
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[ ]+[0-9a-f]+:[ ]+c2259073[ ]+csrw[ ]+vlenb,a1
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[ ]+[0-9a-f]+:[ ]+bc002573[ ]+csrr[ ]+a0,mpm
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[ ]+[0-9a-f]+:[ ]+bc059073[ ]+csrw[ ]+mpm,a1
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[ ]+[0-9a-f]+:[ ]+9c002573[ ]+csrr[ ]+a0,spm
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[ ]+[0-9a-f]+:[ ]+9c059073[ ]+csrw[ ]+spm,a1
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[ ]+[0-9a-f]+:[ ]+8c002573[ ]+csrr[ ]+a0,upm
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[ ]+[0-9a-f]+:[ ]+8c059073[ ]+csrw[ ]+upm,a1
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[ ]+[0-9a-f]+:[ ]+ac002573[ ]+csrr[ ]+a0,hspm
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[ ]+[0-9a-f]+:[ ]+ac059073[ ]+csrw[ ]+hspm,a1

‎gas/testsuite/gas/riscv/csr-version-1p10.l‎

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@@ -794,3 +794,13 @@
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.*Warning: invalid CSR `vlenb', needs `zve32x' extension
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.*Warning: invalid CSR `vlenb', needs `zve32x' extension
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.*Warning: read-only CSR is written `csrw vlenb,a1'
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.*Warning: invalid CSR `mpm', needs `zjpm' extension
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.*Warning: invalid CSR `mpm', needs `zjpm' extension
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.*Warning: invalid CSR `spm', needs `zjpm' extension
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.*Warning: invalid CSR `spm', needs `zjpm' extension
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.*Warning: invalid CSR `upm', needs `zjpm' extension
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.*Warning: invalid CSR `upm', needs `zjpm' extension
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.*Warning: invalid CSR `hspm', needs `h' extension
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.*Warning: invalid CSR `hspm', needs `zjpm' extension
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.*Warning: invalid CSR `hspm', needs `h' extension
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.*Warning: invalid CSR `hspm', needs `zjpm' extension

‎gas/testsuite/gas/riscv/csr-version-1p11.d‎

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@@ -887,3 +887,11 @@ Disassembly of section .text:
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[ ]+[0-9a-f]+:[ ]+c2159073[ ]+csrw[ ]+vtype,a1
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[ ]+[0-9a-f]+:[ ]+c2202573[ ]+csrr[ ]+a0,vlenb
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[ ]+[0-9a-f]+:[ ]+c2259073[ ]+csrw[ ]+vlenb,a1
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[ ]+[0-9a-f]+:[ ]+bc002573[ ]+csrr[ ]+a0,mpm
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[ ]+[0-9a-f]+:[ ]+bc059073[ ]+csrw[ ]+mpm,a1
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[ ]+[0-9a-f]+:[ ]+9c002573[ ]+csrr[ ]+a0,spm
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[ ]+[0-9a-f]+:[ ]+9c059073[ ]+csrw[ ]+spm,a1
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[ ]+[0-9a-f]+:[ ]+8c002573[ ]+csrr[ ]+a0,upm
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[ ]+[0-9a-f]+:[ ]+8c059073[ ]+csrw[ ]+upm,a1
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[ ]+[0-9a-f]+:[ ]+ac002573[ ]+csrr[ ]+a0,hspm
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[ ]+[0-9a-f]+:[ ]+ac059073[ ]+csrw[ ]+hspm,a1

‎gas/testsuite/gas/riscv/csr-version-1p11.l‎

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@@ -792,3 +792,13 @@
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.*Warning: invalid CSR `vlenb', needs `zve32x' extension
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.*Warning: invalid CSR `vlenb', needs `zve32x' extension
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.*Warning: read-only CSR is written `csrw vlenb,a1'
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.*Warning: invalid CSR `mpm', needs `zjpm' extension
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.*Warning: invalid CSR `mpm', needs `zjpm' extension
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.*Warning: invalid CSR `spm', needs `zjpm' extension
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.*Warning: invalid CSR `spm', needs `zjpm' extension
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.*Warning: invalid CSR `upm', needs `zjpm' extension
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.*Warning: invalid CSR `upm', needs `zjpm' extension
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.*Warning: invalid CSR `hspm', needs `h' extension
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.*Warning: invalid CSR `hspm', needs `zjpm' extension
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.*Warning: invalid CSR `hspm', needs `h' extension
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.*Warning: invalid CSR `hspm', needs `zjpm' extension

‎gas/testsuite/gas/riscv/csr-version-1p12.d‎

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@@ -887,3 +887,11 @@ Disassembly of section .text:
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[ ]+[0-9a-f]+:[ ]+c2159073[ ]+csrw[ ]+vtype,a1
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[ ]+[0-9a-f]+:[ ]+c2202573[ ]+csrr[ ]+a0,vlenb
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[ ]+[0-9a-f]+:[ ]+c2259073[ ]+csrw[ ]+vlenb,a1
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[ ]+[0-9a-f]+:[ ]+bc002573[ ]+csrr[ ]+a0,mpm
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[ ]+[0-9a-f]+:[ ]+bc059073[ ]+csrw[ ]+mpm,a1
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[ ]+[0-9a-f]+:[ ]+9c002573[ ]+csrr[ ]+a0,spm
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[ ]+[0-9a-f]+:[ ]+9c059073[ ]+csrw[ ]+spm,a1
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[ ]+[0-9a-f]+:[ ]+8c002573[ ]+csrr[ ]+a0,upm
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[ ]+[0-9a-f]+:[ ]+8c059073[ ]+csrw[ ]+upm,a1
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[ ]+[0-9a-f]+:[ ]+ac002573[ ]+csrr[ ]+a0,hspm
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[ ]+[0-9a-f]+:[ ]+ac059073[ ]+csrw[ ]+hspm,a1

‎gas/testsuite/gas/riscv/csr-version-1p12.l‎

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@@ -674,3 +674,13 @@
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.*Warning: invalid CSR `vlenb', needs `zve32x' extension
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.*Warning: invalid CSR `vlenb', needs `zve32x' extension
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.*Warning: read-only CSR is written `csrw vlenb,a1'
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.*Warning: invalid CSR `mpm', needs `zjpm' extension
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.*Warning: invalid CSR `mpm', needs `zjpm' extension
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.*Warning: invalid CSR `spm', needs `zjpm' extension
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.*Warning: invalid CSR `spm', needs `zjpm' extension
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.*Warning: invalid CSR `upm', needs `zjpm' extension
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.*Warning: invalid CSR `upm', needs `zjpm' extension
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.*Warning: invalid CSR `hspm', needs `h' extension
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.*Warning: invalid CSR `hspm', needs `zjpm' extension
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.*Warning: invalid CSR `hspm', needs `h' extension
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.*Warning: invalid CSR `hspm', needs `zjpm' extension

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