add byte width amo instructions

riscv/insns/amoadd_b.h

@@ -0,0 +1,3 @@
+require_extension('A');
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo<uint8_t>(RS1, [&](uint8_t lhs) { return lhs + RS2; })));

riscv/insns/amoand_b.h

@@ -0,0 +1,3 @@
+require_extension('A');
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo<uint8_t>(RS1, [&](uint8_t lhs) { return lhs & RS2; })));

riscv/insns/amocas_b.h

@@ -0,0 +1,4 @@
+require_extension('A');
+require_extension(EXT_ZACAS);
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo_compare_and_swap<uint8_t>(RS1, RD, RS2)));

riscv/insns/amomax_b.h

@@ -0,0 +1,3 @@
+require_extension('A');
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo<uint8_t>(RS1, [&](int8_t lhs) { return std::max(lhs, int8_t(RS2)); })));

riscv/insns/amomaxu_b.h

@@ -0,0 +1,3 @@
+require_extension('A');
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo<uint8_t>(RS1, [&](uint8_t lhs) { return std::max(lhs, uint8_t(RS2)); })));

riscv/insns/amomin_b.h

@@ -0,0 +1,3 @@
+require_extension('A');
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo<uint8_t>(RS1, [&](int8_t lhs) { return std::min(lhs, int8_t(RS2)); })));

riscv/insns/amominu_b.h

@@ -0,0 +1,3 @@
+require_extension('A');
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo<uint8_t>(RS1, [&](uint8_t lhs) { return std::min(lhs, uint8_t(RS2)); })));

riscv/insns/amoor_b.h

@@ -0,0 +1,3 @@
+require_extension('A');
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo<uint8_t>(RS1, [&](uint8_t lhs) { return lhs | RS2; })));

riscv/insns/amoswap_b.h

@@ -0,0 +1,3 @@
+require_extension('A');
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo<uint8_t>(RS1, [&](uint8_t UNUSED lhs) { return RS2; })));

riscv/insns/amoxor_b.h

@@ -0,0 +1,3 @@
+require_extension('A');
+require_extension(EXT_ZABHA);
+WRITE_RD((sreg_t)(int8_t)(MMU.amo<uint8_t>(RS1, [&](uint8_t lhs) { return lhs ^ RS2; })));