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feat(arch): scale and exponent-extract the scalar FP16 in the extension layer

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Assisted-by: GLM 5.3 Flash
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petrbalvin committed 2026-10-07 00:07:58 +02:00
1 parent 127e52de69
commit 0354a1f4c1
3 files changed
+20 -4
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arch/amd64_ext.go
+6
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@@ -364,6 +364,12 @@ var amd64Extensions = []ExtInstr{
{Name: "VSQRTSH", Summary: "Compute the square root of a scalar FP16 value",
Bytes: []byte{0x62, 0x05, 0x06, 0x00, 0x51, 0xC0}, Form: ExtFormAmdVec3, Feature: ExtFeatureFP16,
Ref: "Intel SDM Vol. 2C, VSQRTSH (EVEX.NDS.LIG.F3.MAP5.W0 51 /r)"},
{Name: "VSCALEFSH", Summary: "Scale a scalar FP16 value by the ratio of two others",
Bytes: []byte{0x62, 0x06, 0x05, 0x00, 0x2D, 0xC0}, Form: ExtFormAmdVec3, Feature: ExtFeatureFP16,
Ref: "Intel SDM Vol. 2C, VSCALEFSH (EVEX.NDS.LIG.66.MAP6.W0 2D /r)"},
{Name: "VGETEXPSH", Summary: "Convert the exponent of a scalar FP16 value to an FP16 value",
Bytes: []byte{0x62, 0x06, 0x05, 0x00, 0x43, 0xC0}, Form: ExtFormAmdVec3, Feature: ExtFeatureFP16,
Ref: "Intel SDM Vol. 2C, VGETEXPSH (EVEX.NDS.LIG.66.MAP6.W0 43 /r)"},
{Name: "VCOMISH", Summary: "Compare a scalar FP16 value and set EFLAGS",
Bytes: []byte{0x62, 0x05, 0x04, 0x00, 0x2F, 0xC0}, Form: ExtFormAmdVec2, Feature: ExtFeatureFP16,
Ref: "Intel SDM Vol. 2C, VCOMISH (EVEX.LIG.MAP5.W0 2F /r)"},